shallower ellipses

animationMario.go

@@ -68,6 +68,14 @@ func (a *Animation) updateMarioPosition() {
 	marioX += centerX
 	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 marioY < 0 || marioY >= a.ctx.Height() {
+		a.mario.angle = math.Pi + (math.Pi - a.mario.angle)
+	}
+
 	a.mario.position.X = marioX
 	a.mario.position.Y = marioY
 
@@ -77,16 +85,15 @@ func (a *Animation) updateMarioPosition() {
 		a.mario.angle -= 2 * math.Pi
 	}
 
-	// Direction logic
+	// Direction logic for up and down movement
 	if math.Sin(t) > 0 {
 		a.mario.dir.X = -1 // Moving left
 	} else {
 		a.mario.dir.X = 1 // Moving right
 	}
-
 	if math.Cos(t) > 0 {
-		a.mario.updown = "marioUp" // Moving downward
+		a.mario.updown = "marioDown" // Moving downward
 	} else {
-		a.mario.updown = "marioDown" // Moving upward
+		a.mario.updown = "marioUp" // Moving upward
 	}
 }