port new texture example

Port of the original example at this link https://www.raylib.com/examples/textures/textures_sprite_explosion.html to Go

examples/textures/sprite_explosion/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+var (
+	numFramesPerLine, numLines = 5, 5
+)
+
+func main() {
+	screenWidth := int32(1280)
+	screenHeight := int32(720)
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [shapes] example - sprite explosion")
+
+	rl.InitAudioDevice()
+	fxBoom := rl.LoadSound("boom.wav")
+	explosion := rl.LoadTexture("explosion.png")
+
+	frameW := float32(explosion.Width / int32(numFramesPerLine))
+	frameH := float32(explosion.Height / int32(numLines))
+
+	currentFrame, currentLine := 0, 0
+
+	frameRec := rl.NewRectangle(0, 0, frameW, frameH)
+	position := rl.NewVector2(0, 0)
+
+	active := false
+	framesCount := 0
+
+	rl.SetTargetFPS(120)
+
+	for !rl.WindowShouldClose() {
+
+		if rl.IsMouseButtonPressed(rl.MouseLeftButton) && !active {
+			position = rl.GetMousePosition()
+			active = true
+			position.X -= frameW / 2
+			position.Y -= frameH / 2
+			rl.PlaySound(fxBoom)
+		}
+
+		if active {
+			framesCount++
+			if framesCount > 2 {
+				currentFrame++
+				if currentFrame >= numFramesPerLine {
+					currentFrame = 0
+					currentLine++
+					if currentLine >= numLines {
+						currentLine = 0
+						active = false
+					}
+				}
+
+				framesCount = 0
+			}
+		}
+
+		frameRec.X = frameW * float32(currentFrame)
+		frameRec.Y = frameH * float32(currentLine)
+
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawText("click left mouse on screen to explode", 19, 21, 20, rl.Red)
+		rl.DrawText("click left mouse on screen to explode", 20, 20, 20, rl.Black)
+
+		if active {
+			rl.DrawTextureRec(explosion, frameRec, position, rl.White)
+		}
+
+		rl.EndDrawing()
+	}
+
+	rl.UnloadTexture(explosion)
+	rl.UnloadSound(fxBoom)
+	rl.CloseAudioDevice()
+
+	rl.CloseWindow()
+}