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feat(renderer): integrate SSGI output into deferred lighting pass

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Adds t_ssgi/s_ssgi bindings (group 2, bindings 5-6) to
lighting_shadow_bind_group_layout and deferred_lighting.wgsl. Replaces the
simple ambient term with SSGI-modulated ambient: ao*ssgi_ao applied to IBL
diffuse+specular, plus ssgi_indirect for indirect color bleeding.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
tolelom
2026-03-25 12:05:08 +09:00
parent eea6194d86
commit 3248cd3529
1 changed files with 6 additions and 1 deletions
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7
crates/voltex_renderer/src/deferred_lighting.wgsl
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@@ -49,6 +49,8 @@ struct ShadowUniform {
@group(2) @binding(2) var<uniform> shadow: ShadowUniform; @group(2) @binding(2) var<uniform> shadow: ShadowUniform;
@group(2) @binding(3) var t_brdf_lut: texture_2d<f32>; @group(2) @binding(3) var t_brdf_lut: texture_2d<f32>;
@group(2) @binding(4) var s_brdf_lut: sampler; @group(2) @binding(4) var s_brdf_lut: sampler;
@group(2) @binding(5) var t_ssgi: texture_2d<f32>;
@group(2) @binding(6) var s_ssgi: sampler;
// ── Vertex / Fragment structs ───────────────────────────────────────────────── // ── Vertex / Fragment structs ─────────────────────────────────────────────────
@@ -294,7 +296,10 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
let brdf_val = textureSample(t_brdf_lut, s_brdf_lut, vec2<f32>(NdotV_ibl, roughness)); let brdf_val = textureSample(t_brdf_lut, s_brdf_lut, vec2<f32>(NdotV_ibl, roughness));
let specular_ibl = prefiltered * (F0 * brdf_val.r + vec3<f32>(brdf_val.g)); let specular_ibl = prefiltered * (F0 * brdf_val.r + vec3<f32>(brdf_val.g));
let ambient = (diffuse_ibl + specular_ibl) * ao; let ssgi_data = textureSample(t_ssgi, s_ssgi, uv);
let ssgi_ao = ssgi_data.r;
let ssgi_indirect = ssgi_data.gba;
let ambient = (diffuse_ibl + specular_ibl) * ao * ssgi_ao + ssgi_indirect;
var color = ambient + Lo; var color = ambient + Lo;