playcanvas

Version:
PlayCanvas WebGL game engine
31 lines (29 loc) • 961 B
JavaScript
var opacityDitherPS = `
#if STD_OPACITY_DITHER == BAYER8
	#include "bayerPS"
#endif
uniform blueNoiseJitter: vec4f;
#if STD_OPACITY_DITHER == BLUENOISE
	var blueNoiseTex32 : texture_2d<f32>;
	var blueNoiseTex32Sampler : sampler;
#endif
fn opacityDither(alpha: f32, id: f32) {
	#if STD_OPACITY_DITHER == BAYER8
		var noise: f32 = bayer8(floor((pcPosition.xy + uniform.blueNoiseJitter.xy + id) % vec2f(8.0))) / 64.0;
	#else
		#if STD_OPACITY_DITHER == BLUENOISE
			var uv = fract(pcPosition.xy / 32.0 + uniform.blueNoiseJitter.xy + id);
			var noise: f32 = textureSampleLevel(blueNoiseTex32, blueNoiseTex32Sampler, uv, 0.0).y;
		#endif
		#if STD_OPACITY_DITHER == IGNNOISE
			var magic = vec3f(0.06711056, 0.00583715, 52.9829189);
			var noise: f32 = fract(magic.z * fract(dot(pcPosition.xy + uniform.blueNoiseJitter.xy + id, magic.xy)));
		#endif
	#endif
	noise = pow(noise, 2.2);
	if (alpha < noise) {
		discard;
	}
}
`;

export { opacityDitherPS as default };