samples for a blog post on LibGDX programming targeting OUYA

controller-sample.java

public class Cursor {

	public static float DEFAULT_VELOCITY = 500f;

	private final Vector2 position;
	public final Vector2 velocity;

	public Cursor() {
		position = new Vector2(0, 0);
		velocity = new Vector2(0, 0);
	}

	public void updatePosition(float timeDelta) {
		position.add(velocity.tmp().mul(timeDelta));
	}

	public Vector2 getPosition() {
		return position;
	}

	public void setPosition(float x, float y) {
		this.position.set(x, y);
	}
}

public class GameWorld {

	private Vector2 cursorVec = new Vector2(0, 0);
	private final Cursor cursor = new Cursor();

	private void processInput(float timeDelta) {
		cursor.velocity.y = 0;
		cursor.velocity.x = 0;

		for (Controller controller : Controllers.getControllers()) {
			float axisY = 0;
			float axisX = 0;
			if (Ouya.ID.equals(controller.getName())) {
				axisY = controller.getAxis(Ouya.AXIS_LEFT_Y);
				axisX = controller.getAxis(Ouya.AXIS_LEFT_X);
			}
			if (Math.abs(axisY) > 0.2) {
				cursor.velocity.y = -axisY * Cursor.DEFAULT_VELOCITY;
			}
			if (Math.abs(axisX) > 0.2) {
				cursor.velocity.x = axisX * Cursor.DEFAULT_VELOCITY;
			}
		}
	}
  
	public void update(float timeDelta) {
		processInput(timeDelta);
		cursor.updatePosition(timeDelta);
		level.update(timeDelta);
	}

	@Override
	public boolean mouseMoved(int screenX, int screenY) {
		cursorVec.set(screenX, screenY, 0);
		renderer.getCamera().unproject(cursorVec);
		cursor.setPosition(cursorVec.x, cursorVec.y);
	}
}

process-input.java

	private void processInput(float timeDelta) {
		cursor.velocity.y = 0;
		cursor.velocity.x = 0;

		for (Controller controller : Controllers.getControllers()) {
			float axisY = 0;
			float axisX = 0;
			if (Ouya.ID.equals(controller.getName())) {
				axisY = controller.getAxis(Ouya.AXIS_LEFT_Y);
				axisX = controller.getAxis(Ouya.AXIS_LEFT_X);
			}
			if (Math.abs(axisY) > 0.2) {
				cursor.velocity.y = -axisY * Cursor.DEFAULT_VELOCITY;
			}
			if (Math.abs(axisX) > 0.2) {
				cursor.velocity.x = axisX * Cursor.DEFAULT_VELOCITY;
			}
		}
	}

	public void update(float timeDelta) {
		processInput(timeDelta);
		cursor.position.add(cursor.velocity.tmp().mul(timeDelta));
		level.update(timeDelta);
	}

render-example.java

public void drawCursor(Cursor cursor) {
	Vector2 position = cursor.getPosition();
	spriteBatch.setColor(white);
	spriteBatch.draw(cursorTexture, position.x, position.y - cursorHeight, cursorWidth, cursorHeight);
}