mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 06:34:11 +00:00
00cade072c
It's a bit flaky for particles, especially at higher frame rates, but that's due to supporting only 64 overlapping pixels. A reasonable solution is probably switching to a priority heap for the "sort" and upping the limit.
57 lines
1.4 KiB
GLSL
57 lines
1.4 KiB
GLSL
#version 450
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#extension GL_GOOGLE_include_directive : enable
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#include "oit_store.finc"
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layout (set = 3, binding = 0) uniform sampler2DArray Texture;
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layout (push_constant) uniform PushConstants {
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vec4 fog;
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float time;
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float alpha;
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float turb_scale;
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};
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layout (location = 0) in vec4 tl_st;
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layout (location = 1) in vec3 direction;
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layout (location = 2) in vec4 color;
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layout(early_fragment_tests) in;
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//layout (location = 0) out vec4 frag_color;
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const float PI = 3.14159265;
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const float SPEED = 20.0;
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const float CYCLE = 128.0;
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const float FACTOR = PI * 2.0 / CYCLE;
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const vec2 BIAS = vec2 (1.0, 1.0);
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const float SCALE = 8.0;
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vec2
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warp_st (vec2 st, float time)
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{
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vec2 angle = st.ts * CYCLE / 2.0;
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vec2 phase = vec2 (time, time) * SPEED;
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return st + turb_scale * (sin ((angle + phase) * FACTOR) + BIAS) / SCALE;
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}
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vec4
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fogBlend (vec4 color)
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{
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float az = fog.a * gl_FragCoord.z / gl_FragCoord.w;
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vec3 fog_color = fog.rgb;
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float fog_factor = exp (-az * az);
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return vec4 (mix (fog_color.rgb, color.rgb, fog_factor), color.a);
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}
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void
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main (void)
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{
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vec2 st = warp_st (tl_st.xy, time);
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vec4 c = texture (Texture, vec3(st, 0));
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vec4 e = texture (Texture, vec3(st, 1));
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float a = c.a * e.a * alpha;
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c += e;
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c.a = a;
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//frag_color = c * color;//fogBlend (c);
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StoreFrag (c * color, gl_FragCoord.z);
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}
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