deflect on edge hit

animationMario.go

@@ -69,11 +69,16 @@ func (a *Animation) updateMarioPosition() {
 	marioY += centerY
 
 	// Check for edge collision and change direction if necessary
-	if marioX < 0 || marioX >= a.ctx.Width() {
-		a.mario.angle = -a.mario.angle
+	if marioX < 0 {
+		a.mario.angle = -a.mario.angle + math.Pi // Reflect horizontally and adjust angle
+	} else if marioX >= a.ctx.Width() {
+		a.mario.angle = -a.mario.angle + math.Pi // Reflect horizontally and adjust angle
 	}
-	if marioY < 0 || marioY >= a.ctx.Height() {
-		a.mario.angle = math.Pi + (math.Pi - a.mario.angle)
+
+	if marioY < 0 {
+		a.mario.angle = math.Pi - a.mario.angle // Flip vertically and adjust angle
+	} else if marioY >= a.ctx.Height() {
+		a.mario.angle = math.Pi - a.mario.angle // Flip vertically and adjust angle
 	}
 
 	a.mario.position.X = marioX