92 lines
2.9 KiB
Python
92 lines
2.9 KiB
Python
"""
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raylib [physac] example - physics demo
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"""
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from pyray import Vector2
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from raylib import *
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from raylib.colors import (
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BLACK,
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GREEN,
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WHITE
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)
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SCREEN_WIDTH = 800
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SCREEN_HEIGHT = 450
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SetConfigFlags(FLAG_MSAA_4X_HINT)
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InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, b'[physac] Basic demo')
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InitPhysics()
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floor = CreatePhysicsBodyRectangle(Vector2(SCREEN_WIDTH/2, SCREEN_HEIGHT), 500, 100, 10)
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floor.enabled = False
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circle = CreatePhysicsBodyCircle(Vector2(SCREEN_WIDTH/2, SCREEN_HEIGHT/2), 45, 10)
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circle.enabled = False
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SetTargetFPS(60)
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while not WindowShouldClose():
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# Update
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# ----------------------------------------------------------------------
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UpdatePhysics() # Update physics system
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if IsKeyPressed(KEY_R): # Reset physics system
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ResetPhysics()
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floor = CreatePhysicsBodyRectangle(Vector2(SCREEN_WIDTH/2, SCREEN_HEIGHT), 500, 100, 10)
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floor.enabled = False
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circle = CreatePhysicsBodyCircle(Vector2(SCREEN_WIDTH/2, SCREEN_HEIGHT/2), 45, 10)
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circle.enabled = False
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# Physics body creation inputs
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if IsMouseButtonPressed(MOUSE_BUTTON_LEFT):
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CreatePhysicsBodyPolygon(GetMousePosition(), GetRandomValue(20, 80), GetRandomValue(3, 8), 10)
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elif IsMouseButtonPressed(MOUSE_BUTTON_RIGHT):
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CreatePhysicsBodyCircle(GetMousePosition(), GetRandomValue(10, 45), 10)
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# Destroy falling physics bodies
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bodies_count = GetPhysicsBodiesCount()
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for i in reversed(range(bodies_count)):
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body = GetPhysicsBody(i)
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if body and body.position.y > SCREEN_HEIGHT * 2:
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DestroyPhysicsBody(body)
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# ----------------------------------------------------------------------
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# Draw
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# ----------------------------------------------------------------------
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BeginDrawing()
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ClearBackground(BLACK)
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DrawFPS(SCREEN_WIDTH - 90, SCREEN_HEIGHT - 30)
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# Draw created physics bodies
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bodies_count = GetPhysicsBodiesCount()
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for i in range(bodies_count):
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body = GetPhysicsBody(i)
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if body:
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vertex_count = GetPhysicsShapeVerticesCount(i)
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for j in range(vertex_count):
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# Get physics bodies shape vertices to draw lines
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# Note: GetPhysicsShapeVertex() already calculates rotation transformations
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vertexA = GetPhysicsShapeVertex(body, j)
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# Get next vertex or first to close the shape
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jj = (j + 1) if (j+1) < vertex_count else 0
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vertexB = GetPhysicsShapeVertex(body, jj)
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# Draw a line between two vertex positions
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DrawLineV(vertexA, vertexB, GREEN)
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DrawText(b'Left mouse button to create a polygon', 10, 10, 10, WHITE)
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DrawText(b'Right mouse button to create a circle', 10, 25, 10, WHITE)
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DrawText(b"Press 'R' to reset example", 10, 40, 10, WHITE)
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EndDrawing()
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# ----------------------------------------------------------------------
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ClosePhysics()
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CloseWindow()
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