Coding the moving platform component class

All we need to do to bring this new object to life is code a UpdateComponent. We already have the specification in the GOSpec package and a regular graphics-related component class has already been coded.

MoveableBlockUpdateComponent

Create a new class called MoveableBlockUpdateComponent, extend UpdateComponent and add the required update method as shown next.

import android.graphics.PointF;

class MovableBlockUpdateComponent implements UpdateComponent {

    @Override
    public void update(long fps, 
                       Transform t, 
                       Transform playerTransform) {

        PointF location = t.getLocation();
        if (t.headingUp()) {
            location.y -= t.getSpeed() / fps;
        } else if (t.headingDown()) {
            location.y += t.getSpeed() / fps;
        } else {
            // Must be first update of the game 
            // so start with going down
            t.headDown();
        }

        // Check...