playcanvas

Version:
PlayCanvas WebGL game engine
59 lines (57 loc) • 1.36 kB
JavaScript
var gsplatPS = `
#ifndef DITHER_NONE
	#include "bayerPS"
	#include "opacityDitherPS"
	varying id: f32;
#endif
#ifdef PICK_PASS
	#include "pickPS"
#endif
#if defined(SHADOW_PASS) || defined(PICK_PASS) || defined(PREPASS_PASS)
	uniform alphaClip: f32;
#endif
#ifdef PREPASS_PASS
	varying vLinearDepth: f32;
	#include "floatAsUintPS"
#endif
const EXP4	  = exp(-4.0);
const INV_EXP4  = 1.0 / (1.0 - EXP4);
fn normExp(x: f32) -> f32 {
	return (exp(x * -4.0) - EXP4) * INV_EXP4;
}
varying gaussianUV: vec2f;
varying gaussianColor: vec4f;
@fragment
fn fragmentMain(input: FragmentInput) -> FragmentOutput {
	var output: FragmentOutput;
	let A: f32 = dot(gaussianUV, gaussianUV);
	if (A > 1.0) {
		discard;
		return output;
	}
	var alpha = normExp(A) * gaussianColor.a;
	#if defined(SHADOW_PASS) || defined(PICK_PASS) || defined(PREPASS_PASS)
		if (alpha < uniform.alphaClip) {
			discard;
			return output;
		}
	#endif
	#ifdef PICK_PASS
		output.color = getPickOutput();
	#elif SHADOW_PASS
		output.color = vec4f(0.0, 0.0, 0.0, 1.0);
	#elif PREPASS_PASS
		output.color = float2vec4(vLinearDepth);
	#else
		if (alpha < (1.0 / 255.0)) {
			discard;
			return output;
		}
		#ifndef DITHER_NONE
			opacityDither(&alpha, id * 0.013);
		#endif
		output.color = vec4f(input.gaussianColor.xyz * alpha, alpha);
	#endif
	return output;
}`;

export { gsplatPS as default };