radixzz

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    radixzz
  1. Hi guys! I'm trying to figure out how to apply some custom frag shader into a filter. The intented effect is a simple crt warp over a sprite. Here is what I got so far: https://jsfiddle.net/djq6kjx4/1/ but It should look something like the image in the attachment. As you can see from the example above the warp effect is mostly visible to one corner. Now I'm starting with shaders but I think the reason is that vTextureCoord is somehow off? I tried to use the mapCoords and unmapCoords from https://github.com/pixijs/pixi-filters/blob/master/src/pixelate/pixelate.frag similarly without success (I have no Idea what those do). Some time after I tried to use gl_fragCoord directly like this: vec2 coord = gl_FragCoord.xy / dimensions.xy; wich seems to do the trick but the texture comes out flippled. Im sure it can be fixed but I don't think this is a good path to follow. Right? Any hint would be much appreciated Thanks