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    <p>I recently needed to do the same, and didn't want to deal with pixel shaders. I figured I could mess with how the texture is blended into the scene to get some sort of white flash out of it.</p> <p>So, I figured out a reasonable light-flash effect by repeatedly changing the sprite's Destination glBlend function from GL_ONE_MINUS_SRC_ALPHA to GL_ONE, and then back.</p> <p>Here's my toggle method:</p> <pre><code>-(void)toggleBlendFlash { if (sprite_) { ccBlendFunc blendFunc = sprite_.blendFunc; if (blendFunc.dst == GL_ONE_MINUS_SRC_ALPHA) { blendFunc.dst = GL_ONE; //flash white } else { blendFunc.dst = GL_ONE_MINUS_SRC_ALPHA; //default } sprite_.blendFunc = blendFunc; } } </code></pre> <p>Here's my flashing sequence:</p> <pre><code>CCSequence *sequence = [CCSequence actions: [CCCallFunc actionWithTarget:targetEnemy selector:@selector(toggleBlendFlash)], [CCDelayTime actionWithDuration:0.3], [CCCallFunc actionWithTarget:targetEnemy selector:@selector(toggleBlendFlash)], [CCDelayTime actionWithDuration:0.2], nil ]; </code></pre> <p>It may not look perfect for your situation, but give it a try! </p> <hr> <p>EDIT 1: Also, check these links out for more info/resources:</p> <ul> <li><a href="http://digitallybold.com/314/cocos2d-additive-sprite-color-tinting" rel="nofollow">http://digitallybold.com/314/cocos2d-additive-sprite-color-tinting</a> </li> <li><a href="http://www.andersriggelsen.dk/glblendfunc.php" rel="nofollow">http://www.andersriggelsen.dk/glblendfunc.php</a> </li> </ul> <p>EDIT 2: </p> <p>Of course, I just realized that if your sprite is animating between different CCTexture2D objects (e.g. you have 1 file per frame), then it resets your blendFunc for every frame, which means you have to either create a category or a subclass for CCSprite or CCAnimate to re-apply your custom blendFunc... so I guess its not as quick of a solution as I had originally thought.</p>
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    1. POiPhone game development with Cocos2d: how to generate a cool light effect when an entity gets hit?
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