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https://git.code.sf.net/p/quake/quakeforge
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140fe93a9c
It turns out what I thought was a cascade selection bug was just very bad choice of cascade steps: factors of 8 just don't work nicely. I'm not sure that simple factors work all that well, either. I need to make the cascade system configurable and probably support more cascades.
35 lines
847 B
GLSL
35 lines
847 B
GLSL
#version 450
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#extension GL_GOOGLE_include_directive : enable
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#include "lighting.h"
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layout (set = 3, binding = 0) uniform sampler2DArrayShadow shadow_map[32];
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float
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shadow (uint map_id, uint layer, uint mat_id, vec4 pos, vec3 lpos)
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{
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float fd = pos.w;
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uint ind = fd > CascadeDepths[1]
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? fd > CascadeDepths[0] ? 0 : 1
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: fd > CascadeDepths[2] ? 2 : 3;
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vec4 p = shadow_mats[mat_id + ind] * vec4 (pos.xyz, 1);
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p = p / p.w;
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float depth = p.z;
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vec2 uv = (p.xy + vec2(1)) / 2;
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return texture (shadow_map[map_id], vec4 (uv, layer + ind, depth));
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}
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vec4
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debug_shadow (vec4 pos)
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{
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float fd = pos.w;
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uint ind = fd > CascadeDepths[1]
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? fd > CascadeDepths[0] ? 0 : 1
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: fd > CascadeDepths[2] ? 2 : 3;
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ind += 1;
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return vec4 (ind & 1, ind & 2, ind & 4, 1);
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}
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//#define DEBUG_SHADOW(p) debug_shadow(p)
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#include "lighting_main.finc"
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