playcanvas

Version:
PlayCanvas WebGL game engine
29 lines (27 loc) • 856 B
JavaScript
var opacityDitherPS = `
#if STD_OPACITY_DITHER == BAYER8
	#include "bayerPS"
#endif
uniform vec4 blueNoiseJitter;
#if STD_OPACITY_DITHER == BLUENOISE
	uniform sampler2D blueNoiseTex32;
#endif
void opacityDither(float alpha, float id) {
	#if STD_OPACITY_DITHER == BAYER8
		float noise = bayer8(floor(mod(gl_FragCoord.xy + blueNoiseJitter.xy + id, 8.0))) / 64.0;
	#else
		#if STD_OPACITY_DITHER == BLUENOISE
			vec2 uv = fract(gl_FragCoord.xy / 32.0 + blueNoiseJitter.xy + id);
			float noise = texture2DLod(blueNoiseTex32, uv, 0.0).y;
		#endif
		#if STD_OPACITY_DITHER == IGNNOISE
			vec3 magic = vec3(0.06711056, 0.00583715, 52.9829189);
			float noise = fract(magic.z * fract(dot(gl_FragCoord.xy + blueNoiseJitter.xy + id, magic.xy)));
		#endif
	#endif
	noise = pow(noise, 2.2);
	if (alpha < noise)
		discard;
}
`;

export { opacityDitherPS as default };