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Make the StandardMaterial bindless index table have a fixed size regardless of the features that are enabled. (#18771)

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Due to the preprocessor usage in the shader, different combinations of
features could cause the fields of `StandardMaterialBindings` to shift
around. In certain cases, this could cause them to not line up with the
bindings specified in `StandardMaterial`. This resulted in #18104.

This commit fixes the issue by making `StandardMaterialBindings` have a
fixed size. On the CPU side, it uses the
`#[bindless(index_table(range(M..N)))]` feature I added to `AsBindGroup`
in #18025 to do so. Thus this patch has a dependency on #18025.

Closes #18104.

---------

Co-authored-by: Robert Swain <robert.swain@gmail.com>
This commit is contained in:
Patrick Walton 2025-04-09 13:39:42 -07:00 committed by François Mockers
parent 8eb85ea720
commit 76422f71cd
2 changed files with 1 additions and 9 deletions
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2
crates/bevy_pbr/src/pbr_material.rs
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@ -32,7 +32,7 @@ pub enum UvChannel {
#[derive(Asset, AsBindGroup, Reflect, Debug, Clone)]
#[bind_group_data(StandardMaterialKey)]
#[data(0, StandardMaterialUniform, binding_array(10))]
#[bindless]
#[bindless(index_table(range(0..31)))]
#[reflect(Default, Debug, Clone)]
pub struct StandardMaterial {
/// The color of the surface of the material before lighting.

8
crates/bevy_pbr/src/render/pbr_bindings.wgsl
View File

@ -17,32 +17,24 @@ struct StandardMaterialBindings {
normal_map_sampler: u32, // 10
depth_map_texture: u32, // 11
depth_map_sampler: u32, // 12
#ifdef PBR_ANISOTROPY_TEXTURE_SUPPORTED
anisotropy_texture: u32, // 13
anisotropy_sampler: u32, // 14
#endif // PBR_ANISOTROPY_TEXTURE_SUPPORTED
#ifdef PBR_TRANSMISSION_TEXTURES_SUPPORTED
specular_transmission_texture: u32, // 15
specular_transmission_sampler: u32, // 16
thickness_texture: u32, // 17
thickness_sampler: u32, // 18
diffuse_transmission_texture: u32, // 19
diffuse_transmission_sampler: u32, // 20
#endif // PBR_TRANSMISSION_TEXTURES_SUPPORTED
#ifdef PBR_MULTI_LAYER_MATERIAL_TEXTURES_SUPPORTED
clearcoat_texture: u32, // 21
clearcoat_sampler: u32, // 22
clearcoat_roughness_texture: u32, // 23
clearcoat_roughness_sampler: u32, // 24
clearcoat_normal_texture: u32, // 25
clearcoat_normal_sampler: u32, // 26
#endif // PBR_MULTI_LAYER_MATERIAL_TEXTURES_SUPPORTED
#ifdef PBR_SPECULAR_TEXTURES_SUPPORTED
specular_texture: u32, // 27
specular_sampler: u32, // 28
specular_tint_texture: u32, // 29
specular_tint_sampler: u32, // 30
#endif // PBR_SPECULAR_TEXTURES_SUPPORTED
}
@group(2) @binding(0) var<storage> material_indices: array<StandardMaterialBindings>;