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[vulkan] Get spotlight shadows working

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They currently have a hard-coded bias of 0.5 pixels (if I'm doing my
math correctly) to combat the shadow acne, but look pretty good.
This commit is contained in:
Bill Currie 2023-08-02 19:34:37 +09:00
parent a626dc7ca8
commit 1fe0f5ffd5
3 changed files with 10 additions and 3 deletions
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2
libs/video/renderer/vulkan/rp_main_def.plist
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@ -1555,7 +1555,7 @@ renderpasses = {
color = { color = {
light = { light = {
layout = color_attachment_optimal; layout = color_attachment_optimal;
blend = $blend_disable; blend = $additive_blend;
}; };
}; };
preserve = (depth, output); preserve = (depth, output);

9
libs/video/renderer/vulkan/shader/lighting_plane.frag
View file

@ -1,12 +1,19 @@
#version 450 #version 450
#extension GL_GOOGLE_include_directive : enable #extension GL_GOOGLE_include_directive : enable
layout (set = 0, binding = 0) buffer ShadowMatrices {
mat4 shadow_mats[];
};
layout (set = 3, binding = 0) uniform sampler2DArrayShadow shadow_map[32]; layout (set = 3, binding = 0) uniform sampler2DArrayShadow shadow_map[32];
float float
shadow (uint map_id, uint layer, uint mat_id, vec3 pos) shadow (uint map_id, uint layer, uint mat_id, vec3 pos)
{ {
return 1; vec4 p = shadow_mats[mat_id] * vec4 (pos, 1);
p = p / (p.w - 0.5); //FIXME hard-coded bias
float depth = p.z;
vec2 uv = (p.xy + vec2(1)) / 2;
return texture (shadow_map[map_id], vec4 (uv, layer, depth));
} }
#include "lighting_main.finc" #include "lighting_main.finc"

2
libs/video/renderer/vulkan/smp_quake.plist
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@ -112,7 +112,7 @@ samplers = {
anisotropyEnable = false; anisotropyEnable = false;
maxAnisotropy = 0; maxAnisotropy = 0;
compareEnable = true; compareEnable = true;
compareOp = less; compareOp = greater_or_equal;
minLod = 0; minLod = 0;
maxLod = 1000; maxLod = 1000;
borderColor = float_opaque_white; borderColor = float_opaque_white;