88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
/*******************************************************************************************
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*
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* raylib [shapes] example - draw circle sector (with gui options)
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*
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* Example originally created with raylib 2.5, last time updated with raylib 2.5
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*
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* Example contributed by Vlad Adrian (@demizdor) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2018-2024 Vlad Adrian (@demizdor) and Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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package main
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import (
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"fmt"
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"math"
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gui "git.terah.dev/UnrealXR/raylib-go/raygui"
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rl "git.terah.dev/UnrealXR/raylib-go/raylib"
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)
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const (
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screenWidth = 800
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screenHeight = 450
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)
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func main() {
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rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - draw circle sector")
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center := rl.Vector2{X: (float32(screenWidth) - 300) / 2.0, Y: float32(screenHeight / 2.0)}
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var outerRadius, startAngle, endAngle, segments, minSegments float32 = 180.0, 0.0, 180.0, 10.0, 4
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rl.SetTargetFPS(60) // Set our game to run at 60 frames-per-second
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// Main game loop
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for !rl.WindowShouldClose() { // Detect window close button or ESC key
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// Draw
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rl.BeginDrawing()
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rl.ClearBackground(rl.RayWhite)
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rl.DrawLine(500, 0, 500, screenWidth, rl.Fade(rl.LightGray, 0.6))
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rl.DrawRectangle(500, 0, screenWidth-500, screenHeight, rl.Fade(rl.LightGray, 0.3))
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rl.DrawCircleSector(center, outerRadius, startAngle, endAngle, int32(segments), rl.Fade(rl.Maroon, 0.3))
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rl.DrawCircleSectorLines(center, outerRadius, startAngle, endAngle, int32(segments), rl.Fade(rl.Maroon, 0.6))
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// Draw GUI controls
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r := rl.Rectangle{X: 600, Y: 40, Width: 120, Height: 20}
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msg := fmt.Sprintf("%.2f", startAngle)
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startAngle = gui.Slider(r, "StartAngle", msg, startAngle, 0, 720)
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r = rl.Rectangle{X: 600, Y: 70, Width: 120, Height: 20}
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msg = fmt.Sprintf("%.2f", endAngle)
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endAngle = gui.Slider(r, "EndAngle", msg, endAngle, 0, 720)
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r = rl.Rectangle{X: 600, Y: 140, Width: 120, Height: 20}
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msg = fmt.Sprintf("%.2f", outerRadius)
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outerRadius = gui.Slider(r, "Radius", msg, outerRadius, 0, 200)
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r = rl.Rectangle{X: 600, Y: 170, Width: 120, Height: 20}
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msg = fmt.Sprintf("%.2f", segments)
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segments = gui.Slider(r, "Segments", msg, segments, 0, 100)
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minSegments = calculateMinSegments(startAngle, endAngle)
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text := "MODE: AUTO"
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color := rl.DarkGray
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if segments >= minSegments {
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text = "MODE: MANUAL"
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color = rl.Maroon
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}
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rl.DrawText(text, 600, 200, 10, color)
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rl.DrawFPS(10, 10)
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rl.EndDrawing()
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}
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// De-Initialization
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rl.CloseWindow() // Close window and OpenGL context
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}
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func calculateMinSegments(startAngle, endAngle float32) float32 {
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return float32(math.Trunc(math.Ceil((float64(endAngle - startAngle)) / 90)))
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}
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