cocos2d-iphone - cocos2d 去除色调

Question

我正在尝试为我的精灵实现高亮动画。精灵应该突出显示给定的颜色并逐渐恢复到其原始颜色，使用以下代码：

- (void)highlight {
    CCTintTo *tintAction = [CCTintTo actionWithDuration:0.1 red:255 green:255 blue:255];
    CCTintTo *tintBackAction = [tintAction reverse];

    CCSequence *sequence = [CCSequence actions: tintAction, tintBackAction, nil];
    [self runAction:sequence];
}

现在这个函数引发了一个异常，因为 CCTintTo 似乎没有实现“反向”，这是有道理的。有没有其他方法可以使用 CCAction 在间隔内去除添加的色调？

Answer 1

1. CCSprite's default color is ccWhite, {255, 255, 255}, so if you want to make sprite lighter, you'll have to subclass CCSprite/write shader to use additive coloring.

2. Just tint it back:

   CCColor3B oldColor = sprite.color;
   CCTintTo *tintTo = [CCTintTo actionWithDuration:t red:r green:g blue:b];
   CCTintTo *tintBack = [CCTintTo actionWithDuration:t red:oldColor.r green:oldColor.g blue:oldColor.b];
   [sprite runAction:[CCSequence actions: tintTo, tintBack, nil]];
   

Answer 2

对于 Cocos2dx (C++)

ccColor3B oldColor = sprite->getColor();
        CCTintTo* action = CCTintTo::create(0.5f, 127, 255, 127);
        CCTintTo* actionReverse = CCTintTo::create(0.5f, oldColor.r, oldColor.g, oldColor.b);;
        sprite->runAction(CCSequence::create(action, actionReverse, NULL));

工作正常克雷里，谢谢！我已经给你加分了:)。

Answer 3

您可以在开始着色之前存储以前的颜色，然后只需使用初始 RGB 值创建 CCTintTo。