OrthoCamController.java

/*
 * Catroid: An on-device visual programming system for Android devices
 * Copyright (C) 2010-2016 The Catrobat Team
 * (<http://developer.catrobat.org/credits>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * An additional term exception under section 7 of the GNU Affero
 * General Public License, version 3, is available at
 * http://developer.catrobat.org/license_additional_term
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.catrobat.catroid.stage;

import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.Vector3;

public class OrthoCamController extends InputAdapter {
	final OrthographicCamera camera;
	final Vector3 curr = new Vector3();
	final Vector3 last = new Vector3(-1, -1, -1);
	final Vector3 delta = new Vector3();

	public OrthoCamController(OrthographicCamera camera) {
		this.camera = camera;
	}

	@Override
	public boolean touchDragged(int x, int y, int pointer) {
		camera.unproject(curr.set(x, y, 0));
		if (!(last.x == -1 && last.y == -1 && last.z == -1)) {
			camera.unproject(delta.set(last.x, last.y, 0));
			delta.sub(curr);
			camera.position.add(delta.x, delta.y, 0);
		}
		last.set(x, y, 0);
		return false;
	}

	@Override
	public boolean touchUp(int x, int y, int pointer, int button) {
		last.set(-1, -1, -1);
		return false;
	}
}