54701a844e
This reverts commit 0b5302d96a.
# Objective
- Fixes #18158
- #17482 introduced rendering changes and was merged a bit too fast
## Solution
- Revert #17482 so that it can be redone and rendering changes discussed
before being merged. This will make it easier to compare changes with
main in the known "valid" state
This is not an issue with the work done in #17482 that is still
interesting
30 lines
1.1 KiB
WebGPU Shading Language
30 lines
1.1 KiB
WebGPU Shading Language
#define_import_path bevy_pbr::ambient
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#import bevy_pbr::{
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lighting::{EnvBRDFApprox, F_AB},
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mesh_view_bindings::lights,
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}
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// A precomputed `NdotV` is provided because it is computed regardless,
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// but `world_normal` and the view vector `V` are provided separately for more advanced uses.
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fn ambient_light(
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world_position: vec4<f32>,
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world_normal: vec3<f32>,
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V: vec3<f32>,
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NdotV: f32,
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diffuse_color: vec3<f32>,
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specular_color: vec3<f32>,
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perceptual_roughness: f32,
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occlusion: vec3<f32>,
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) -> vec3<f32> {
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let diffuse_ambient = EnvBRDFApprox(diffuse_color, F_AB(1.0, NdotV));
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let specular_ambient = EnvBRDFApprox(specular_color, F_AB(perceptual_roughness, NdotV));
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// No real world material has specular values under 0.02, so we use this range as a
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// "pre-baked specular occlusion" that extinguishes the fresnel term, for artistic control.
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// See: https://google.github.io/filament/Filament.html#specularocclusion
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let specular_occlusion = saturate(dot(specular_color, vec3(50.0 * 0.33)));
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return (diffuse_ambient + specular_ambient * specular_occlusion) * lights.ambient_color.rgb * occlusion;
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}
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