LNTintBy.java

/**
 * Copyright 2008 - 2012
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loon
 * @author cping
 * @email：javachenpeng@yahoo.com
 * @version 0.3.3
 */
package loon.action.sprite.node;

import loon.core.graphics.device.LColor;

public class LNTintBy extends LNAction {

	LNTintBy() {

	}

	protected LColor _delta;

	protected LColor _from;

	public static LNTintBy Action(float t, LColor c) {
		LNTintBy tint = new LNTintBy();
		tint._duration = t;
		tint._delta = c;
		return tint;
	}

	public void setTarget(LNNode node) {
		super._firstTick = true;
		super._isEnd = false;
		super._target = node;
		_from = node.getColor();
	}

	public void update(float t) {
		final int fred = _from.getRed();
		final int fgreen = _from.getGreen();
		final int fblue = _from.getBlue();
		final int dred = _delta.getRed();
		final int dgreen = _delta.getGreen();
		final int dblue = _delta.getBlue();
		final int r = (int) (fred + dred * t);
		final int g = (int) (fgreen + dgreen * t);
		final int b = (int) (fblue + dblue * t);
		super._target.setColor(r, g, b);
	}

	public LNAction copy() {
		return Action(_duration, _delta);
	}

	public LNTintBy reverse() {
		return Action(_duration, new LColor(-_delta.r, -_delta.g, -_delta.b));
	}
}