1import super::{
2    bindings::{globals, view, VertexOutput},
3};
4enable wgpu_mesh_shader;
5
6// TODO: import these functions in the future when doing so does not crash the shader.
7// Convert ndc depth to linear view z.
8// Note: Depth values in front of the camera will be negative as -z is forward
9fn depth_ndc_to_view_z(ndc_depth: f32, clip_from_view: mat4x4<f32>, view_from_clip: mat4x4<f32>) -> f32 {
10// #ifdef VIEW_PROJECTION_PERSPECTIVE
11    return -perspective_camera_near(clip_from_view) / ndc_depth;
12// #else ifdef VIEW_PROJECTION_ORTHOGRAPHIC
13//     return -(clip_from_view[3][2] - ndc_depth) / clip_from_view[2][2];
14// #else
15//     let view_pos = view_from_clip * vec4(0.0, 0.0, ndc_depth, 1.0);
16//     return view_pos.z / view_pos.w;
17// #endif
18}
19
20fn perspective_camera_near(clip_from_view: mat4x4<f32>) -> f32 {
21    return clip_from_view[3][2];
22}
23
24struct PrimitiveInput {
25    @per_primitive @location(3) colorMask: vec4<f32>,
26}
27
28struct Output {
29    @location(0) color: vec4<f32>,
30    @builtin(frag_depth) frag_depth: f32
31}
32
33@fragment
34fn fragment(vertex: VertexOutput, primitive: PrimitiveInput) -> Output {
35    var output: Output;
36    // output.color = vec4(vertex.uv, 0.,1.);
37    // output.color = vec4(vertex.normal,1.);
38    output.color = primitive.colorMask;
39    output.frag_depth = vertex.position.z;
40    return output;
41}