Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[Merged by Bors] - bevy_pbr: Fix incorrect and unnecessary normal-mapping code #5766

Closed
wants to merge 4 commits into from
Closed

[Merged by Bors] - bevy_pbr: Fix incorrect and unnecessary normal-mapping code #5766

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
8025c0f
bevy_pbr: Remove incorrect and unnecessary normal-mapping code
superdump Aug 22, 2022
dbf9097
bevy_pbr: Fix negation of normal for back-side when no normal map
superdump Aug 22, 2022
0c04b2a
Minor shader fixes
superdump Aug 22, 2022
009a501
Merge branch 'main' into fix-normals-negative-scale
superdump Nov 3, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
11 changes: 7 additions & 4 deletions assets/shaders/array_texture.wgsl
View file
Open in desktop
Expand Up @@ -34,20 +34,23 @@ fn fragment(in: FragmentInput) -> @location(0) vec4<f32> {

pbr_input.frag_coord = in.frag_coord;
pbr_input.world_position = in.world_position;
pbr_input.world_normal = in.world_normal;
pbr_input.world_normal = prepare_world_normal(
in.world_normal,
(pbr_input.material.flags & STANDARD_MATERIAL_FLAGS_DOUBLE_SIDED_BIT) != 0u,
in.is_front,
);

pbr_input.is_orthographic = view.projection[3].w == 1.0;

pbr_input.N = prepare_normal(
pbr_input.N = apply_normal_mapping(
pbr_input.material.flags,
in.world_normal,
pbr_input.world_normal,
#ifdef VERTEX_TANGENTS
#ifdef STANDARDMATERIAL_NORMAL_MAP
in.world_tangent,
#endif
#endif
in.uv,
in.is_front,
);
pbr_input.V = calculate_view(in.world_position, pbr_input.is_orthographic);

Expand Down
1 change: 0 additions & 1 deletion crates/bevy_pbr/src/render/mesh.wgsl
View file
Open in desktop
Expand Up @@ -70,7 +70,6 @@ fn vertex(vertex: Vertex) -> VertexOutput {
}

struct FragmentInput {
@builtin(front_facing) is_front: bool,
#import bevy_pbr::mesh_vertex_output
};

Expand Down
11 changes: 7 additions & 4 deletions crates/bevy_pbr/src/render/pbr.wgsl
View file
Open in desktop
Expand Up @@ -69,13 +69,17 @@ fn fragment(in: FragmentInput) -> @location(0) vec4<f32> {

pbr_input.frag_coord = in.frag_coord;
pbr_input.world_position = in.world_position;
pbr_input.world_normal = in.world_normal;
pbr_input.world_normal = prepare_world_normal(
in.world_normal,
(material.flags & STANDARD_MATERIAL_FLAGS_DOUBLE_SIDED_BIT) != 0u,
in.is_front,
);

pbr_input.is_orthographic = view.projection[3].w == 1.0;

pbr_input.N = prepare_normal(
pbr_input.N = apply_normal_mapping(
material.flags,
in.world_normal,
pbr_input.world_normal,
#ifdef VERTEX_TANGENTS
#ifdef STANDARDMATERIAL_NORMAL_MAP
in.world_tangent,
Expand All @@ -84,7 +88,6 @@ fn fragment(in: FragmentInput) -> @location(0) vec4<f32> {
#ifdef VERTEX_UVS
in.uv,
#endif
in.is_front,
);
pbr_input.V = calculate_view(in.world_position, pbr_input.is_orthographic);
output_color = pbr(pbr_input);
Expand Down
33 changes: 17 additions & 16 deletions crates/bevy_pbr/src/render/pbr_functions.wgsl
View file
Open in desktop
Expand Up @@ -23,9 +23,23 @@ fn alpha_discard(material: StandardMaterial, output_color: vec4<f32>) -> vec4<f3
return color;
}

// NOTE: This ensures that the world_normal is normalized and if
// vertex tangents and normal maps then normal mapping may be applied.
fn prepare_normal(
fn prepare_world_normal(
world_normal: vec3<f32>,
double_sided: bool,
is_front: bool,
) -> vec3<f32> {
var output: vec3<f32> = world_normal;
#ifndef VERTEX_TANGENTS
#ifndef STANDARDMATERIAL_NORMAL_MAP
// NOTE: When NOT using normal-mapping, if looking at the back face of a double-sided
// material, the normal needs to be inverted. This is a branchless version of that.
output = (f32(!double_sided || is_front) * 2.0 - 1.0) * output;
#endif
#endif
return output;
}

fn apply_normal_mapping(
standard_material_flags: u32,
world_normal: vec3<f32>,
#ifdef VERTEX_TANGENTS
Expand All @@ -36,7 +50,6 @@ fn prepare_normal(
#ifdef VERTEX_UVS
uv: vec2<f32>,
#endif
is_front: bool,
) -> vec3<f32> {
// NOTE: The mikktspace method of normal mapping explicitly requires that the world normal NOT
// be re-normalized in the fragment shader. This is primarily to match the way mikktspace
Expand All @@ -57,18 +70,6 @@ fn prepare_normal(
#endif
#endif

if ((standard_material_flags & STANDARD_MATERIAL_FLAGS_DOUBLE_SIDED_BIT) != 0u) {
if (!is_front) {
N = -N;
#ifdef VERTEX_TANGENTS
#ifdef STANDARDMATERIAL_NORMAL_MAP
T = -T;
B = -B;
#endif
#endif
}
}

#ifdef VERTEX_TANGENTS
#ifdef VERTEX_UVS
#ifdef STANDARDMATERIAL_NORMAL_MAP
Expand Down
1 change: 0 additions & 1 deletion crates/bevy_sprite/src/mesh2d/color_material.wgsl
View file
Open in desktop
Expand Up @@ -19,7 +19,6 @@ var texture_sampler: sampler;
var<uniform> mesh: Mesh2d;

struct FragmentInput {
@builtin(front_facing) is_front: bool,
#import bevy_sprite::mesh2d_vertex_output
};

Expand Down
1 change: 0 additions & 1 deletion crates/bevy_sprite/src/mesh2d/mesh2d.wgsl
View file
Open in desktop
Expand Up @@ -55,7 +55,6 @@ fn vertex(vertex: Vertex) -> VertexOutput {
}

struct FragmentInput {
@builtin(front_facing) is_front: bool,
#import bevy_sprite::mesh2d_vertex_output
};

Expand Down