Init, test raylib & math things

bouncing_ball.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	rl.InitWindow(screenWidth, screenHeight, "Bouncing Ball in Go - raylib")
+	defer rl.CloseWindow()
+
+	rl.SetTargetFPS(60)
+
+	// Ball properties
+	ballRadius := float32(20)
+	ballPos := rl.NewVector2(float32(screenWidth)/2.0, float32(screenHeight)/2.0)
+	ballSpeed := rl.NewVector2(4, 3)
+	ballColor := rl.Red
+
+	for !rl.WindowShouldClose() {
+		// Update
+		ballPos.X += ballSpeed.X
+		ballPos.Y += ballSpeed.Y
+
+		// Bounce on edges
+		if ballPos.X >= float32(screenWidth)-ballRadius || ballPos.X <= ballRadius {
+			ballSpeed.X *= -1
+		}
+		if ballPos.Y >= float32(screenHeight)-ballRadius || ballPos.Y <= ballRadius {
+			ballSpeed.Y *= -1
+		}
+
+		// Draw
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawText("Bouncing Ball Example", 10, 10, 20, rl.DarkGray)
+		rl.DrawCircleV(ballPos, ballRadius, ballColor)
+
+		rl.EndDrawing()
+	}
+}