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Fix fog scene depth comparison

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This commit is contained in:
Lauri Räsänen 2023-11-10 20:09:20 +02:00
parent 3676f8fef5
commit c0f41045da
3 changed files with 13 additions and 20 deletions
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22
res/shaders/fog.wgsl
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@ -85,23 +85,18 @@ fn depth_to_linear(depth: f32) -> f32 {
@fragment
fn fs_main(vert: FogVertexOutput) -> @location(0) vec4<f32> {
let cam_to_volume = vert.world_position.xyz - camera.position.xyz;
var distance_to_volume = length(cam_to_volume);
let direction = cam_to_volume / distance_to_volume;
// FIXME: geom depth should always be greater than the volume surface depth...
// why is this broken?
distance_to_volume = depth_to_linear(vert.clip_position.z);
let uv = vert.clip_position.xy / camera.planes.xy;
let depth = textureSample(t_geometry_depth, s_geometry_depth, uv);
let geometry_depth = depth_to_linear(depth) - distance_to_volume;
if (geometry_depth <= 0.0)
let direction = normalize(vert.world_position.xyz - camera.position.xyz);
let volume_depth = depth_to_linear(vert.clip_position.z);
let uv = vert.clip_position.xy / camera.planes.zw;
let geometry_depth = depth_to_linear(textureSample(t_geometry_depth, s_geometry_depth, uv));
let max_fog_depth = geometry_depth - volume_depth;
if (max_fog_depth <= 0.0)
{
return vec4<f32>(0.0);
}
return vec4<f32>(1.0);
/*
let density = ray_march(vert.world_position.xyz, direction, geometry_depth);
let density = ray_march(vert.world_position.xyz, direction, max_fog_depth);
// return vec4<f32>(1.0, 1.0, 1.0, density);
var in_light = 0.0;
if (global_uniforms.use_shadowmaps > 0u) {
@ -153,5 +148,4 @@ fn fs_main(vert: FogVertexOutput) -> @location(0) vec4<f32> {
result = result / (result + vec3(1.0));
return vec4(result, density * FOG_ALPHA);
*/
}