quakeforge/libs/video/renderer/vulkan/shader/particle.frag

#version 450
#extension GL_GOOGLE_include_directive : enable
#include "oit_store.finc"

layout (location = 0) in vec4 uv_tr;
layout (location = 1) in vec4 color;

layout(early_fragment_tests) in;

void
main (void)
{
	vec4        c = color;
	vec2        x = uv_tr.xy;

	float       a = 1 - dot (x, x);
	if (a <= 0) {
		discard;
	}
	c *= (a);
	StoreFrag (c, gl_FragCoord.z);
}