b5fe41f41a
Just for clarification, no plans to remove libc dependency, just did some code analysis to see how much raylib depend on stardard C library. My conclusions: - stdlib.h: primary dependency is for malloc() and free() - stdio.h: primary dependency is for FILE access, maybe it could go through a custom ABI? - string.h: just around 8 functions required - math.h: just around 8 functions required - others: 1-2 functions required for some other headers
1569 lines
67 KiB
C
1569 lines
67 KiB
C
/**********************************************************************************************
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*
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* raylib.shapes - Basic functions to draw 2d Shapes and check collisions
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*
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* CONFIGURATION:
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*
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* #define SUPPORT_FONT_TEXTURE
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* Draw rectangle shapes using font texture white character instead of default white texture
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* Allows drawing rectangles and text with a single draw call, very useful for GUI systems!
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*
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* #define SUPPORT_QUADS_DRAW_MODE
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* Use QUADS instead of TRIANGLES for drawing when possible.
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* Some lines-based shapes could still use lines
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*
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* LICENSE: zlib/libpng
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*
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* Copyright (c) 2013-2020 Ramon Santamaria (@raysan5)
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*
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* This software is provided "as-is", without any express or implied warranty. In no event
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* will the authors be held liable for any damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose, including commercial
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* applications, and to alter it and redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not claim that you
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* wrote the original software. If you use this software in a product, an acknowledgment
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* in the product documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
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* as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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**********************************************************************************************/
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#include "raylib.h" // Declares module functions
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// Check if config flags have been externally provided on compilation line
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#if !defined(EXTERNAL_CONFIG_FLAGS)
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#include "config.h" // Defines module configuration flags
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#endif
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#include "rlgl.h" // raylib OpenGL abstraction layer to OpenGL 1.1, 2.1, 3.3+ or ES2
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#include <stdlib.h> // Required for: fabs()
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#include <math.h> // Required for: sinf(), asinf(), cosf(), acosf(), sqrtf()
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//----------------------------------------------------------------------------------
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// Defines and Macros
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//----------------------------------------------------------------------------------
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// Nop...
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//----------------------------------------------------------------------------------
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// Types and Structures Definition
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//----------------------------------------------------------------------------------
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// Not here...
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//----------------------------------------------------------------------------------
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// Global Variables Definition
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//----------------------------------------------------------------------------------
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// ...
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//----------------------------------------------------------------------------------
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// Module specific Functions Declaration
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//----------------------------------------------------------------------------------
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static float EaseCubicInOut(float t, float b, float c, float d); // Cubic easing
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//----------------------------------------------------------------------------------
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// Module Functions Definition
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//----------------------------------------------------------------------------------
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// Draw a pixel
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void DrawPixel(int posX, int posY, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2i(posX, posY);
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rlVertex2i(posX + 1, posY + 1);
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rlEnd();
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}
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// Draw a pixel (Vector version)
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void DrawPixelV(Vector2 position, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(position.x, position.y);
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rlVertex2f(position.x + 1.0f, position.y + 1.0f);
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rlEnd();
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}
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// Draw a line
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void DrawLine(int startPosX, int startPosY, int endPosX, int endPosY, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2i(startPosX, startPosY);
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rlVertex2i(endPosX, endPosY);
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rlEnd();
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}
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// Draw a line (Vector version)
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void DrawLineV(Vector2 startPos, Vector2 endPos, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(startPos.x, startPos.y);
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rlVertex2f(endPos.x, endPos.y);
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rlEnd();
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}
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// Draw a line defining thickness
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void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color)
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{
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if (startPos.x > endPos.x)
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{
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Vector2 tempPos = startPos;
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startPos = endPos;
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endPos = tempPos;
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}
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float dx = endPos.x - startPos.x;
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float dy = endPos.y - startPos.y;
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float d = sqrtf(dx*dx + dy*dy);
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float angle = asinf(dy/d);
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rlEnableTexture(GetShapesTexture().id);
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rlPushMatrix();
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rlTranslatef((float)startPos.x, (float)startPos.y, 0.0f);
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rlRotatef(RAD2DEG*angle, 0.0f, 0.0f, 1.0f);
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rlTranslatef(0, (thick > 1.0f)? -thick/2.0f : -1.0f, 0.0f);
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rlBegin(RL_QUADS);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlNormal3f(0.0f, 0.0f, 1.0f);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(0.0f, 0.0f);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(0.0f, thick);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(d, thick);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(d, 0.0f);
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rlEnd();
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rlPopMatrix();
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rlDisableTexture();
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}
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// Draw line using cubic-bezier curves in-out
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void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color)
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{
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#define LINE_DIVISIONS 24 // Bezier line divisions
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Vector2 previous = startPos;
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Vector2 current;
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for (int i = 1; i <= LINE_DIVISIONS; i++)
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{
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// Cubic easing in-out
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// NOTE: Easing is calculated only for y position value
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current.y = EaseCubicInOut((float)i, startPos.y, endPos.y - startPos.y, (float)LINE_DIVISIONS);
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current.x = previous.x + (endPos.x - startPos.x)/ (float)LINE_DIVISIONS;
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DrawLineEx(previous, current, thick, color);
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previous = current;
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}
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}
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// Draw lines sequence
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void DrawLineStrip(Vector2 *points, int pointsCount, Color color)
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{
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if (pointsCount >= 2)
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{
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if (rlCheckBufferLimit(pointsCount)) rlglDraw();
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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for (int i = 0; i < pointsCount - 1; i++)
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{
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rlVertex2f(points[i].x, points[i].y);
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rlVertex2f(points[i + 1].x, points[i + 1].y);
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}
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rlEnd();
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}
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}
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// Draw a color-filled circle
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void DrawCircle(int centerX, int centerY, float radius, Color color)
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{
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DrawCircleV((Vector2){ (float)centerX, (float)centerY }, radius, color);
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}
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// Draw a piece of a circle
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void DrawCircleSector(Vector2 center, float radius, int startAngle, int endAngle, int segments, Color color)
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{
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if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero
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// Function expects (endAngle > startAngle)
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if (endAngle < startAngle)
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{
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// Swap values
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int tmp = startAngle;
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startAngle = endAngle;
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endAngle = tmp;
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}
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if (segments < 4)
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{
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// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
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#define CIRCLE_ERROR_RATE 0.5f
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// Calculate the maximum angle between segments based on the error rate.
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float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/radius, 2) - 1);
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segments = (endAngle - startAngle)*ceilf(2*PI/th)/360;
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if (segments <= 0) segments = 4;
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}
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float stepLength = (float)(endAngle - startAngle)/(float)segments;
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float angle = startAngle;
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#if defined(SUPPORT_QUADS_DRAW_MODE)
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if (rlCheckBufferLimit(4*segments/2)) rlglDraw();
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rlEnableTexture(GetShapesTexture().id);
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rlBegin(RL_QUADS);
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// NOTE: Every QUAD actually represents two segments
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for (int i = 0; i < segments/2; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(center.x, center.y);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength*2))*radius, center.y + cosf(DEG2RAD*(angle + stepLength*2))*radius);
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angle += (stepLength*2);
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}
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// NOTE: In case number of segments is odd, we add one last piece to the cake
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if (segments%2)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(center.x, center.y);
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rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
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rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
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rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
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rlVertex2f(center.x, center.y);
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}
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rlEnd();
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rlDisableTexture();
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#else
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if (rlCheckBufferLimit(3*segments)) rlglDraw();
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rlBegin(RL_TRIANGLES);
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for (int i = 0; i < segments; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
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angle += stepLength;
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}
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rlEnd();
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#endif
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}
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void DrawCircleSectorLines(Vector2 center, float radius, int startAngle, int endAngle, int segments, Color color)
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{
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if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero issue
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// Function expects (endAngle > startAngle)
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if (endAngle < startAngle)
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{
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// Swap values
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int tmp = startAngle;
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startAngle = endAngle;
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endAngle = tmp;
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}
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if (segments < 4)
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{
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// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
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#ifndef CIRCLE_ERROR_RATE
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#define CIRCLE_ERROR_RATE 0.5f
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#endif
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// Calculate the maximum angle between segments based on the error rate.
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float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/radius, 2) - 1);
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segments = (endAngle - startAngle)*ceilf(2*PI/th)/360;
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if (segments <= 0) segments = 4;
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}
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float stepLength = (float)(endAngle - startAngle)/(float)segments;
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float angle = startAngle;
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// Hide the cap lines when the circle is full
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bool showCapLines = true;
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int limit = 2*(segments + 2);
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if ((endAngle - startAngle)%360 == 0) { limit = 2*segments; showCapLines = false; }
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if (rlCheckBufferLimit(limit)) rlglDraw();
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rlBegin(RL_LINES);
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if (showCapLines)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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}
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for (int i = 0; i < segments; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
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angle += stepLength;
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}
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if (showCapLines)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
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}
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rlEnd();
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}
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// Draw a gradient-filled circle
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// NOTE: Gradient goes from center (color1) to border (color2)
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void DrawCircleGradient(int centerX, int centerY, float radius, Color color1, Color color2)
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{
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if (rlCheckBufferLimit(3*36)) rlglDraw();
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rlBegin(RL_TRIANGLES);
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for (int i = 0; i < 360; i += 10)
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{
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rlColor4ub(color1.r, color1.g, color1.b, color1.a);
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rlVertex2f(centerX, centerY);
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rlColor4ub(color2.r, color2.g, color2.b, color2.a);
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rlVertex2f(centerX + sinf(DEG2RAD*i)*radius, centerY + cosf(DEG2RAD*i)*radius);
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rlColor4ub(color2.r, color2.g, color2.b, color2.a);
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rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radius, centerY + cosf(DEG2RAD*(i + 10))*radius);
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}
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rlEnd();
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}
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// Draw a color-filled circle (Vector version)
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// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues (view rlglDraw)
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void DrawCircleV(Vector2 center, float radius, Color color)
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{
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DrawCircleSector(center, radius, 0, 360, 36, color);
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}
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// Draw circle outline
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void DrawCircleLines(int centerX, int centerY, float radius, Color color)
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{
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if (rlCheckBufferLimit(2*36)) rlglDraw();
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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// NOTE: Circle outline is drawn pixel by pixel every degree (0 to 360)
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for (int i = 0; i < 360; i += 10)
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{
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rlVertex2f(centerX + sinf(DEG2RAD*i)*radius, centerY + cosf(DEG2RAD*i)*radius);
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rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radius, centerY + cosf(DEG2RAD*(i + 10))*radius);
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}
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rlEnd();
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}
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// Draw ellipse
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void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, Color color)
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{
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if (rlCheckBufferLimit(3*36)) rlglDraw();
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rlBegin(RL_TRIANGLES);
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for (int i = 0; i < 360; i += 10)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(centerX, centerY);
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rlVertex2f(centerX + sinf(DEG2RAD*i)*radiusH, centerY + cosf(DEG2RAD*i)*radiusV);
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rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radiusH, centerY + cosf(DEG2RAD*(i + 10))*radiusV);
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}
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rlEnd();
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}
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// Draw ellipse outline
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void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color)
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{
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if (rlCheckBufferLimit(2*36)) rlglDraw();
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rlBegin(RL_LINES);
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for (int i = 0; i < 360; i += 10)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(centerX + sinf(DEG2RAD*i)*radiusH, centerY + cosf(DEG2RAD*i)*radiusV);
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rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radiusH, centerY + cosf(DEG2RAD*(i + 10))*radiusV);
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}
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rlEnd();
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}
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void DrawRing(Vector2 center, float innerRadius, float outerRadius, int startAngle, int endAngle, int segments, Color color)
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{
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if (startAngle == endAngle) return;
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// Function expects (outerRadius > innerRadius)
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if (outerRadius < innerRadius)
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{
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float tmp = outerRadius;
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outerRadius = innerRadius;
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innerRadius = tmp;
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if (outerRadius <= 0.0f) outerRadius = 0.1f;
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}
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// Function expects (endAngle > startAngle)
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if (endAngle < startAngle)
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{
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// Swap values
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int tmp = startAngle;
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startAngle = endAngle;
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endAngle = tmp;
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}
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|
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if (segments < 4)
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{
|
|
// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
|
|
#ifndef CIRCLE_ERROR_RATE
|
|
#define CIRCLE_ERROR_RATE 0.5f
|
|
#endif
|
|
|
|
// Calculate the maximum angle between segments based on the error rate.
|
|
float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
|
|
segments = (endAngle - startAngle)*ceilf(2*PI/th)/360;
|
|
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
// Not a ring
|
|
if (innerRadius <= 0.0f)
|
|
{
|
|
DrawCircleSector(center, outerRadius, startAngle, endAngle, segments, color);
|
|
return;
|
|
}
|
|
|
|
float stepLength = (float)(endAngle - startAngle)/(float)segments;
|
|
float angle = startAngle;
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
if (rlCheckBufferLimit(4*segments)) rlglDraw();
|
|
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlBegin(RL_QUADS);
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
rlEnd();
|
|
|
|
rlDisableTexture();
|
|
#else
|
|
if (rlCheckBufferLimit(6*segments)) rlglDraw();
|
|
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, int startAngle, int endAngle, int segments, Color color)
|
|
{
|
|
if (startAngle == endAngle) return;
|
|
|
|
// Function expects (outerRadius > innerRadius)
|
|
if (outerRadius < innerRadius)
|
|
{
|
|
float tmp = outerRadius;
|
|
outerRadius = innerRadius;
|
|
innerRadius = tmp;
|
|
|
|
if (outerRadius <= 0.0f) outerRadius = 0.1f;
|
|
}
|
|
|
|
// Function expects (endAngle > startAngle)
|
|
if (endAngle < startAngle)
|
|
{
|
|
// Swap values
|
|
int tmp = startAngle;
|
|
startAngle = endAngle;
|
|
endAngle = tmp;
|
|
}
|
|
|
|
if (segments < 4)
|
|
{
|
|
// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
|
|
#ifndef CIRCLE_ERROR_RATE
|
|
#define CIRCLE_ERROR_RATE 0.5f
|
|
#endif
|
|
|
|
// Calculate the maximum angle between segments based on the error rate.
|
|
float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
|
|
segments = (endAngle - startAngle)*ceilf(2*PI/th)/360;
|
|
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
if (innerRadius <= 0.0f)
|
|
{
|
|
DrawCircleSectorLines(center, outerRadius, startAngle, endAngle, segments, color);
|
|
return;
|
|
}
|
|
|
|
float stepLength = (float)(endAngle - startAngle)/(float)segments;
|
|
float angle = startAngle;
|
|
|
|
bool showCapLines = true;
|
|
int limit = 4*(segments + 1);
|
|
if ((endAngle - startAngle)%360 == 0) { limit = 4*segments; showCapLines = false; }
|
|
|
|
if (rlCheckBufferLimit(limit)) rlglDraw();
|
|
|
|
rlBegin(RL_LINES);
|
|
if (showCapLines)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
}
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
|
|
if (showCapLines)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw a color-filled rectangle
|
|
void DrawRectangle(int posX, int posY, int width, int height, Color color)
|
|
{
|
|
DrawRectangleV((Vector2){ (float)posX, (float)posY }, (Vector2){ (float)width, (float)height }, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle (Vector version)
|
|
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues (view rlglDraw)
|
|
void DrawRectangleV(Vector2 position, Vector2 size, Color color)
|
|
{
|
|
DrawRectanglePro((Rectangle){ position.x, position.y, size.x, size.y }, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle
|
|
void DrawRectangleRec(Rectangle rec, Color color)
|
|
{
|
|
DrawRectanglePro(rec, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle with pro parameters
|
|
void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color)
|
|
{
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlPushMatrix();
|
|
rlTranslatef(rec.x, rec.y, 0.0f);
|
|
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
|
|
rlTranslatef(-origin.x, -origin.y, 0.0f);
|
|
|
|
rlBegin(RL_QUADS);
|
|
rlNormal3f(0.0f, 0.0f, 1.0f);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(0.0f, 0.0f);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(0.0f, rec.height);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(rec.width, rec.height);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(rec.width, 0.0f);
|
|
rlEnd();
|
|
rlPopMatrix();
|
|
|
|
rlDisableTexture();
|
|
}
|
|
|
|
// Draw a vertical-gradient-filled rectangle
|
|
// NOTE: Gradient goes from bottom (color1) to top (color2)
|
|
void DrawRectangleGradientV(int posX, int posY, int width, int height, Color color1, Color color2)
|
|
{
|
|
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, color1, color2, color2, color1);
|
|
}
|
|
|
|
// Draw a horizontal-gradient-filled rectangle
|
|
// NOTE: Gradient goes from bottom (color1) to top (color2)
|
|
void DrawRectangleGradientH(int posX, int posY, int width, int height, Color color1, Color color2)
|
|
{
|
|
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, color1, color1, color2, color2);
|
|
}
|
|
|
|
// Draw a gradient-filled rectangle
|
|
// NOTE: Colors refer to corners, starting at top-lef corner and counter-clockwise
|
|
void DrawRectangleGradientEx(Rectangle rec, Color col1, Color col2, Color col3, Color col4)
|
|
{
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlPushMatrix();
|
|
rlBegin(RL_QUADS);
|
|
rlNormal3f(0.0f, 0.0f, 1.0f);
|
|
|
|
// NOTE: Default raylib font character 95 is a white square
|
|
rlColor4ub(col1.r, col1.g, col1.b, col1.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(rec.x, rec.y);
|
|
|
|
rlColor4ub(col2.r, col2.g, col2.b, col2.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(rec.x, rec.y + rec.height);
|
|
|
|
rlColor4ub(col3.r, col3.g, col3.b, col3.a);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(rec.x + rec.width, rec.y + rec.height);
|
|
|
|
rlColor4ub(col4.r, col4.g, col4.b, col4.a);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(rec.x + rec.width, rec.y);
|
|
rlEnd();
|
|
rlPopMatrix();
|
|
|
|
rlDisableTexture();
|
|
}
|
|
|
|
// Draw rectangle outline
|
|
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues (view rlglDraw)
|
|
void DrawRectangleLines(int posX, int posY, int width, int height, Color color)
|
|
{
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
DrawRectangle(posX, posY, width, 1, color);
|
|
DrawRectangle(posX + width - 1, posY + 1, 1, height - 2, color);
|
|
DrawRectangle(posX, posY + height - 1, width, 1, color);
|
|
DrawRectangle(posX, posY + 1, 1, height - 2, color);
|
|
#else
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2i(posX + 1, posY + 1);
|
|
rlVertex2i(posX + width, posY + 1);
|
|
|
|
rlVertex2i(posX + width, posY + 1);
|
|
rlVertex2i(posX + width, posY + height);
|
|
|
|
rlVertex2i(posX + width, posY + height);
|
|
rlVertex2i(posX + 1, posY + height);
|
|
|
|
rlVertex2i(posX + 1, posY + height);
|
|
rlVertex2i(posX + 1, posY + 1);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw rectangle outline with extended parameters
|
|
void DrawRectangleLinesEx(Rectangle rec, int lineThick, Color color)
|
|
{
|
|
if (lineThick > rec.width || lineThick > rec.height)
|
|
{
|
|
if (rec.width > rec.height) lineThick = (int)rec.height/2;
|
|
else if (rec.width < rec.height) lineThick = (int)rec.width/2;
|
|
}
|
|
|
|
DrawRectangle( (int)rec.x, (int)rec.y, (int)rec.width, lineThick, color);
|
|
DrawRectangle( (int)(rec.x - lineThick + rec.width), (int)(rec.y + lineThick), lineThick, (int)(rec.height - lineThick*2.0f), color);
|
|
DrawRectangle( (int)rec.x, (int)(rec.y + rec.height - lineThick), (int)rec.width, lineThick, color);
|
|
DrawRectangle( (int)rec.x, (int)(rec.y + lineThick), lineThick, (int)(rec.height - lineThick*2), color);
|
|
}
|
|
|
|
// Draw rectangle with rounded edges
|
|
void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Color color)
|
|
{
|
|
// Not a rounded rectangle
|
|
if ((roundness <= 0.0f) || (rec.width < 1) || (rec.height < 1 ))
|
|
{
|
|
DrawRectangleRec(rec, color);
|
|
return;
|
|
}
|
|
|
|
if (roundness >= 1.0f) roundness = 1.0f;
|
|
|
|
// Calculate corner radius
|
|
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
|
|
if (radius <= 0.0f) return;
|
|
|
|
// Calculate number of segments to use for the corners
|
|
if (segments < 4)
|
|
{
|
|
// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
|
|
#ifndef CIRCLE_ERROR_RATE
|
|
#define CIRCLE_ERROR_RATE 0.5f
|
|
#endif
|
|
// Calculate the maximum angle between segments based on the error rate.
|
|
float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/radius, 2) - 1);
|
|
segments = ceilf(2*PI/th)/4;
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
float stepLength = 90.0f/(float)segments;
|
|
|
|
/* Quick sketch to make sense of all of this (there are 9 parts to draw, also mark the 12 points we'll use below)
|
|
* Not my best attempt at ASCII art, just preted it's rounded rectangle :)
|
|
* P0 P1
|
|
* ____________________
|
|
* /| |\
|
|
* /1| 2 |3\
|
|
*P7 /__|____________________|__\ P2
|
|
* | |P8 P9| |
|
|
* | 8 | 9 | 4 |
|
|
* | __|____________________|__ |
|
|
*P6 \ |P11 P10| / P3
|
|
* \7| 6 |5/
|
|
* \|____________________|/
|
|
* P5 P4
|
|
*/
|
|
|
|
const Vector2 point[12] = { // coordinates of the 12 points that define the rounded rect (the idea here is to make things easier)
|
|
{(float)rec.x + radius, rec.y}, {(float)(rec.x + rec.width) - radius, rec.y}, { rec.x + rec.width, (float)rec.y + radius }, // PO, P1, P2
|
|
{rec.x + rec.width, (float)(rec.y + rec.height) - radius}, {(float)(rec.x + rec.width) - radius, rec.y + rec.height}, // P3, P4
|
|
{(float)rec.x + radius, rec.y + rec.height}, { rec.x, (float)(rec.y + rec.height) - radius}, {rec.x, (float)rec.y + radius}, // P5, P6, P7
|
|
{(float)rec.x + radius, (float)rec.y + radius}, {(float)(rec.x + rec.width) - radius, (float)rec.y + radius}, // P8, P9
|
|
{(float)(rec.x + rec.width) - radius, (float)(rec.y + rec.height) - radius}, {(float)rec.x + radius, (float)(rec.y + rec.height) - radius} // P10, P11
|
|
};
|
|
|
|
const Vector2 centers[4] = { point[8], point[9], point[10], point[11] };
|
|
const float angles[4] = { 180.0f, 90.0f, 0.0f, 270.0f };
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
if (rlCheckBufferLimit(16*segments/2 + 5*4)) rlglDraw();
|
|
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlBegin(RL_QUADS);
|
|
// Draw all of the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
// NOTE: Every QUAD actually represents two segments
|
|
for (int i = 0; i < segments/2; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x, center.y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength*2))*radius, center.y + cosf(DEG2RAD*(angle + stepLength*2))*radius);
|
|
angle += (stepLength*2);
|
|
}
|
|
// NOTE: In case number of segments is odd, we add one last piece to the cake
|
|
if (segments%2)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x, center.y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x, center.y);
|
|
}
|
|
}
|
|
|
|
// [2] Upper Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
|
|
// [4] Right Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// [6] Bottom Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
|
|
// [8] Left Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
|
|
// [9] Middle Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
rlEnd();
|
|
rlDisableTexture();
|
|
#else
|
|
if (rlCheckBufferLimit(12*segments + 5*6)) rlglDraw(); // 4 corners with 3 vertices per segment + 5 rectangles with 6 vertices each
|
|
|
|
rlBegin(RL_TRIANGLES);
|
|
// Draw all of the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x, center.y);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// [2] Upper Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
// [4] Right Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// [6] Bottom Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
|
|
// [8] Left Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
|
|
// [9] Middle Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw rectangle with rounded edges outline
|
|
void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, int lineThick, Color color)
|
|
{
|
|
if (lineThick < 0) lineThick = 0;
|
|
|
|
// Not a rounded rectangle
|
|
if (roundness <= 0.0f)
|
|
{
|
|
DrawRectangleLinesEx((Rectangle){rec.x-lineThick, rec.y-lineThick, rec.width+2*lineThick, rec.height+2*lineThick}, lineThick, color);
|
|
return;
|
|
}
|
|
|
|
if (roundness >= 1.0f) roundness = 1.0f;
|
|
|
|
// Calculate corner radius
|
|
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
|
|
if (radius <= 0.0f) return;
|
|
|
|
// Calculate number of segments to use for the corners
|
|
if (segments < 4)
|
|
{
|
|
// Calculate how many segments we need to draw a smooth circle, taken from https://stackoverflow.com/a/2244088
|
|
#ifndef CIRCLE_ERROR_RATE
|
|
#define CIRCLE_ERROR_RATE 0.5f
|
|
#endif
|
|
// Calculate the maximum angle between segments based on the error rate.
|
|
float th = acosf(2*powf(1 - CIRCLE_ERROR_RATE/radius, 2) - 1);
|
|
segments = ceilf(2*PI/th)/2;
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
float stepLength = 90.0f/(float)segments;
|
|
const float outerRadius = radius + (float)lineThick, innerRadius = radius;
|
|
|
|
/* Quick sketch to make sense of all of this (mark the 16 + 4(corner centers P16-19) points we'll use below)
|
|
* Not my best attempt at ASCII art, just preted it's rounded rectangle :)
|
|
* P0 P1
|
|
* ====================
|
|
* // P8 P9 \\
|
|
* // \\
|
|
*P7 // P15 P10 \\ P2
|
|
* || *P16 P17* ||
|
|
* || ||
|
|
* || P14 P11 ||
|
|
*P6 \\ *P19 P18* // P3
|
|
* \\ //
|
|
* \\ P13 P12 //
|
|
* ====================
|
|
* P5 P4
|
|
*/
|
|
const Vector2 point[16] = {
|
|
{(float)rec.x + innerRadius, rec.y - lineThick}, {(float)(rec.x + rec.width) - innerRadius, rec.y - lineThick}, { rec.x + rec.width + lineThick, (float)rec.y + innerRadius }, // PO, P1, P2
|
|
{rec.x + rec.width + lineThick, (float)(rec.y + rec.height) - innerRadius}, {(float)(rec.x + rec.width) - innerRadius, rec.y + rec.height + lineThick}, // P3, P4
|
|
{(float)rec.x + innerRadius, rec.y + rec.height + lineThick}, { rec.x - lineThick, (float)(rec.y + rec.height) - innerRadius}, {rec.x - lineThick, (float)rec.y + innerRadius}, // P5, P6, P7
|
|
{(float)rec.x + innerRadius, rec.y}, {(float)(rec.x + rec.width) - innerRadius, rec.y}, // P8, P9
|
|
{ rec.x + rec.width, (float)rec.y + innerRadius }, {rec.x + rec.width, (float)(rec.y + rec.height) - innerRadius}, // P10, P11
|
|
{(float)(rec.x + rec.width) - innerRadius, rec.y + rec.height}, {(float)rec.x + innerRadius, rec.y + rec.height}, // P12, P13
|
|
{ rec.x, (float)(rec.y + rec.height) - innerRadius}, {rec.x, (float)rec.y + innerRadius} // P14, P15
|
|
};
|
|
|
|
const Vector2 centers[4] = {
|
|
{(float)rec.x + innerRadius, (float)rec.y + innerRadius}, {(float)(rec.x + rec.width) - innerRadius, (float)rec.y + innerRadius}, // P16, P17
|
|
{(float)(rec.x + rec.width) - innerRadius, (float)(rec.y + rec.height) - innerRadius}, {(float)rec.x + innerRadius, (float)(rec.y + rec.height) - innerRadius} // P18, P19
|
|
};
|
|
|
|
const float angles[4] = { 180.0f, 90.0f, 0.0f, 270.0f };
|
|
|
|
if (lineThick > 1)
|
|
{
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
if (rlCheckBufferLimit(4*4*segments + 4*4)) rlglDraw(); // 4 corners with 4 vertices for each segment + 4 rectangles with 4 vertices each
|
|
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlBegin(RL_QUADS);
|
|
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// Upper rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
|
|
// Right rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// Lower rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[12].x, point[12].y);
|
|
|
|
// Left rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[15].x, point[15].y);
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
|
|
rlEnd();
|
|
rlDisableTexture();
|
|
#else
|
|
if (rlCheckBufferLimit(4*6*segments + 4*6)) rlglDraw(); // 4 corners with 6(2*3) vertices for each segment + 4 rectangles with 6 vertices each
|
|
|
|
rlBegin(RL_TRIANGLES);
|
|
|
|
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// Upper rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
// Right rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// Lower rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlVertex2f(point[12].x, point[12].y);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
|
|
// Left rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
rlVertex2f(point[15].x, point[15].y);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
// Use LINES to draw the outline
|
|
if (rlCheckBufferLimit(8*segments + 4*2)) rlglDraw(); // 4 corners with 2 vertices for each segment + 4 rectangles with 2 vertices each
|
|
|
|
rlBegin(RL_LINES);
|
|
|
|
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
// And now the remaining 4 lines
|
|
for(int i = 0; i < 8; i += 2)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[i].x, point[i].y);
|
|
rlVertex2f(point[i + 1].x, point[i + 1].y);
|
|
}
|
|
rlEnd();
|
|
}
|
|
}
|
|
|
|
// Draw a triangle
|
|
// NOTE: Vertex must be provided in counter-clockwise order
|
|
void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
|
|
{
|
|
if (rlCheckBufferLimit(4)) rlglDraw();
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlBegin(RL_QUADS);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(v1.x, v1.y);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlEnd();
|
|
|
|
rlDisableTexture();
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlVertex2f(v2.x, v2.y);
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw a triangle using lines
|
|
// NOTE: Vertex must be provided in counter-clockwise order
|
|
void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
|
|
{
|
|
if (rlCheckBufferLimit(6)) rlglDraw();
|
|
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlVertex2f(v2.x, v2.y);
|
|
rlVertex2f(v3.x, v3.y);
|
|
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw a triangle fan defined by points
|
|
// NOTE: First vertex provided is the center, shared by all triangles
|
|
void DrawTriangleFan(Vector2 *points, int pointsCount, Color color)
|
|
{
|
|
if (pointsCount >= 3)
|
|
{
|
|
if (rlCheckBufferLimit((pointsCount - 2)*4)) rlglDraw();
|
|
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
rlBegin(RL_QUADS);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
for (int i = 1; i < pointsCount - 1; i++)
|
|
{
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(points[0].x, points[0].y);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(points[i + 1].x, points[i + 1].y);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(points[i + 1].x, points[i + 1].y);
|
|
}
|
|
rlEnd();
|
|
rlDisableTexture();
|
|
}
|
|
}
|
|
|
|
// Draw a triangle strip defined by points
|
|
// NOTE: Every new vertex connects with previous two
|
|
void DrawTriangleStrip(Vector2 *points, int pointsCount, Color color)
|
|
{
|
|
if (pointsCount >= 3)
|
|
{
|
|
if (rlCheckBufferLimit(pointsCount)) rlglDraw();
|
|
|
|
rlBegin(RL_TRIANGLES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
for (int i = 2; i < pointsCount; i++)
|
|
{
|
|
if ((i%2) == 0)
|
|
{
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
rlVertex2f(points[i - 2].x, points[i - 2].y);
|
|
rlVertex2f(points[i - 1].x, points[i - 1].y);
|
|
}
|
|
else
|
|
{
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
rlVertex2f(points[i - 1].x, points[i - 1].y);
|
|
rlVertex2f(points[i - 2].x, points[i - 2].y);
|
|
}
|
|
}
|
|
rlEnd();
|
|
}
|
|
}
|
|
|
|
// Draw a regular polygon of n sides (Vector version)
|
|
void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color color)
|
|
{
|
|
if (sides < 3) sides = 3;
|
|
float centralAngle = 0.0f;
|
|
|
|
if (rlCheckBufferLimit(4*(360/sides))) rlglDraw();
|
|
|
|
rlPushMatrix();
|
|
rlTranslatef(center.x, center.y, 0.0f);
|
|
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlEnableTexture(GetShapesTexture().id);
|
|
|
|
rlBegin(RL_QUADS);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(0, 0);
|
|
|
|
rlTexCoord2f(GetShapesTextureRec().x/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, (GetShapesTextureRec().y + GetShapesTextureRec().height)/GetShapesTexture().height);
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
|
|
centralAngle += 360.0f/(float)sides;
|
|
rlTexCoord2f((GetShapesTextureRec().x + GetShapesTextureRec().width)/GetShapesTexture().width, GetShapesTextureRec().y/GetShapesTexture().height);
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
}
|
|
rlEnd();
|
|
rlDisableTexture();
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(0, 0);
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
|
|
centralAngle += 360.0f/(float)sides;
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
}
|
|
rlEnd();
|
|
#endif
|
|
rlPopMatrix();
|
|
}
|
|
|
|
// Draw a polygon outline of n sides
|
|
void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Color color)
|
|
{
|
|
if (sides < 3) sides = 3;
|
|
float centralAngle = 0.0f;
|
|
|
|
if (rlCheckBufferLimit(3*(360/sides))) rlglDraw();
|
|
|
|
rlPushMatrix();
|
|
rlTranslatef(center.x, center.y, 0.0f);
|
|
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
|
|
|
|
rlBegin(RL_LINES);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
centralAngle += 360.0f/(float)sides;
|
|
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
|
|
}
|
|
rlEnd();
|
|
rlPopMatrix();
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Definition - Collision Detection functions
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Check if point is inside rectangle
|
|
bool CheckCollisionPointRec(Vector2 point, Rectangle rec)
|
|
{
|
|
bool collision = false;
|
|
|
|
if ((point.x >= rec.x) && (point.x <= (rec.x + rec.width)) && (point.y >= rec.y) && (point.y <= (rec.y + rec.height))) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if point is inside circle
|
|
bool CheckCollisionPointCircle(Vector2 point, Vector2 center, float radius)
|
|
{
|
|
return CheckCollisionCircles(point, 0, center, radius);
|
|
}
|
|
|
|
// Check if point is inside a triangle defined by three points (p1, p2, p3)
|
|
bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2 p3)
|
|
{
|
|
bool collision = false;
|
|
|
|
float alpha = ((p2.y - p3.y)*(point.x - p3.x) + (p3.x - p2.x)*(point.y - p3.y)) /
|
|
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
|
|
|
|
float beta = ((p3.y - p1.y)*(point.x - p3.x) + (p1.x - p3.x)*(point.y - p3.y)) /
|
|
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
|
|
|
|
float gamma = 1.0f - alpha - beta;
|
|
|
|
if ((alpha > 0) && (beta > 0) & (gamma > 0)) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check collision between two rectangles
|
|
bool CheckCollisionRecs(Rectangle rec1, Rectangle rec2)
|
|
{
|
|
bool collision = false;
|
|
|
|
if ((rec1.x < (rec2.x + rec2.width) && (rec1.x + rec1.width) > rec2.x) &&
|
|
(rec1.y < (rec2.y + rec2.height) && (rec1.y + rec1.height) > rec2.y)) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check collision between two circles
|
|
bool CheckCollisionCircles(Vector2 center1, float radius1, Vector2 center2, float radius2)
|
|
{
|
|
bool collision = false;
|
|
|
|
float dx = center2.x - center1.x; // X distance between centers
|
|
float dy = center2.y - center1.y; // Y distance between centers
|
|
|
|
float distance = sqrtf(dx*dx + dy*dy); // Distance between centers
|
|
|
|
if (distance <= (radius1 + radius2)) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check collision between circle and rectangle
|
|
// NOTE: Reviewed version to take into account corner limit case
|
|
bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec)
|
|
{
|
|
int recCenterX = (int)(rec.x + rec.width/2.0f);
|
|
int recCenterY = (int)(rec.y + rec.height/2.0f);
|
|
|
|
float dx = (float)fabs(center.x - recCenterX);
|
|
float dy = (float)fabs(center.y - recCenterY);
|
|
|
|
if (dx > (rec.width/2.0f + radius)) { return false; }
|
|
if (dy > (rec.height/2.0f + radius)) { return false; }
|
|
|
|
if (dx <= (rec.width/2.0f)) { return true; }
|
|
if (dy <= (rec.height/2.0f)) { return true; }
|
|
|
|
float cornerDistanceSq = (dx - rec.width/2.0f)*(dx - rec.width/2.0f) +
|
|
(dy - rec.height/2.0f)*(dy - rec.height/2.0f);
|
|
|
|
return (cornerDistanceSq <= (radius*radius));
|
|
}
|
|
|
|
// Get collision rectangle for two rectangles collision
|
|
Rectangle GetCollisionRec(Rectangle rec1, Rectangle rec2)
|
|
{
|
|
Rectangle retRec = { 0, 0, 0, 0 };
|
|
|
|
if (CheckCollisionRecs(rec1, rec2))
|
|
{
|
|
float dxx = (float)fabs(rec1.x - rec2.x);
|
|
float dyy = (float)fabs(rec1.y - rec2.y);
|
|
|
|
if (rec1.x <= rec2.x)
|
|
{
|
|
if (rec1.y <= rec2.y)
|
|
{
|
|
retRec.x = rec2.x;
|
|
retRec.y = rec2.y;
|
|
retRec.width = rec1.width - dxx;
|
|
retRec.height = rec1.height - dyy;
|
|
}
|
|
else
|
|
{
|
|
retRec.x = rec2.x;
|
|
retRec.y = rec1.y;
|
|
retRec.width = rec1.width - dxx;
|
|
retRec.height = rec2.height - dyy;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (rec1.y <= rec2.y)
|
|
{
|
|
retRec.x = rec1.x;
|
|
retRec.y = rec2.y;
|
|
retRec.width = rec2.width - dxx;
|
|
retRec.height = rec1.height - dyy;
|
|
}
|
|
else
|
|
{
|
|
retRec.x = rec1.x;
|
|
retRec.y = rec1.y;
|
|
retRec.width = rec2.width - dxx;
|
|
retRec.height = rec2.height - dyy;
|
|
}
|
|
}
|
|
|
|
if (rec1.width > rec2.width)
|
|
{
|
|
if (retRec.width >= rec2.width) retRec.width = rec2.width;
|
|
}
|
|
else
|
|
{
|
|
if (retRec.width >= rec1.width) retRec.width = rec1.width;
|
|
}
|
|
|
|
if (rec1.height > rec2.height)
|
|
{
|
|
if (retRec.height >= rec2.height) retRec.height = rec2.height;
|
|
}
|
|
else
|
|
{
|
|
if (retRec.height >= rec1.height) retRec.height = rec1.height;
|
|
}
|
|
}
|
|
|
|
return retRec;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module specific Functions Definition
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Cubic easing in-out
|
|
// NOTE: Required for DrawLineBezier()
|
|
static float EaseCubicInOut(float t, float b, float c, float d)
|
|
{
|
|
if ((t /= 0.5f*d) < 1) return 0.5f*c*t*t*t + b;
|
|
|
|
t -= 2;
|
|
|
|
return 0.5f*c*(t*t*t + 2.0f) + b;
|
|
}
|