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examples/shader: bug fix: use pixels instead of texels for offsets
Closes #2483
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@ -21,16 +21,18 @@ var Cursor vec2
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var ScreenSize vec2
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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border := ScreenSize.y*0.6 + 4*cos(Time*3+texCoord.y*200)
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srcsize := imageSrcTextureSize()
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ypx := texCoord.y * srcsize.y
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border := ScreenSize.y*0.6 + 4*cos(Time*3+ypx/10)
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if position.y < border {
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return imageSrc2UnsafeAt(texCoord)
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}
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srcsize := imageSrcTextureSize()
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rorigin, _ := imageSrcRegionOnTexture()
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xoffset := (4 / srcsize.x) * cos(Time*3+texCoord.y*200)
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yoffset := (20 / srcsize.y) * (1.0 + cos(Time*3+texCoord.y*50))
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xoffset := (4 / srcsize.x) * cos(Time*3+ypx/10)
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yoffset := (20 / srcsize.y) * (1.0 + cos(Time*3+ypx/40))
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bordertex := border / srcsize.y
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clr := imageSrc2At(vec2(
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texCoord.x+xoffset,
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