Dynamically Modify Sprite or CCLayer with bunch of Sprites in it

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Dynamically Modify Sprite or CCLayer with bunch of Sprites in it

(3 posts) (3 voices)

Started 5 months ago by CyberJoe
Latest reply from veryfatmarmot

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CyberJoe
Member

So let's say I have a png image, and it is some kind of image or texture.
Or better say there is a bunch of them in one CCLayer.
How can I:
1) Modify HUE and Saturation of that CCLayer, (make it more black and white, or making it more colorful). In Photoshop you can modify colors of entire image by playing with HUE/Saturation sliders, Is there a way to achieve this with code in cocos2d for given CCLayer?
2) Overlay Other texture over CCLayer so their colors would mix like you do in Photoshop when you put a layer on top of another and set Layer properties to overlay.

Is there a way to achieve it with Cocos2D functions only? or it's only possible with playing with render functions of OpenGL, if it is the second option, could you please bring some code samples?

If this kind of stuff would become possible, it would be possible to create really beautiful auto-generated landscapes in ios game, which is an asset.

Thanks.

Posted 5 months ago #
bryce
Member
Kind of, you can just use the setColor and setOpacity methods to change the colors a bit:
```
CCLayerColor *myLayerColor = [CCLayerColor layerWithColor:ccc4(100, 100, 100, 100)];
[myLayerColor setColor:ccc3(255, 50, 50)];
[myLayerColor setOpacity:50];
```
That would make a semi transparent gray layer red and even more transparent...
Posted 5 months ago #
veryfatmarmot
Member

Hi. Take a look at CCRenderTexture. You can modify the image in your way in initialization and then use it like a texture or sprite. You can even combine images like Photoshop layers, just play with blending mode. Here is the good tutorial by Ray Wenderlich : http://www.raywenderlich.com/3857/how-to-create-dynamic-textures-with-ccrendertexture

Cheers.

Posted 5 months ago #

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