Move all engine stuff to GoRetro. Still many interactions between game and engine code that there should not be.

component_bounder_screen.go

@@ -0,0 +1,39 @@
+package GoRetro
+
+/*
+ * --------------------
+ * BounderScreen
+ * --------------------
+ * A bounder which sets active = false on anything which
+ * has left the screen
+ */
+
+type bounderScreen struct {
+	container *Element
+}
+
+func NewBounderScreen(container *Element) *bounderScreen {
+	return &bounderScreen{container: container}
+}
+
+func (bounder *bounderScreen) onDraw() error {
+	return nil
+}
+
+func (bounder *bounderScreen) onUpdate() error {
+	b := bounder.container
+
+	// If the position is outside the screen bounds then set it as inactive
+	// and mark for deletion
+	if b.Position.X > ScreenWidth || b.Position.X < 0 ||
+		b.Position.Y > ScreenHeight || b.Position.Y < 0 {
+		b.Active = false
+		b.Delete = true
+	}
+
+	return nil
+}
+
+func (bounder *bounderScreen) onCollision(other *Element) error {
+	return nil
+}