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[vulkan] Clear position.w to zero

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This puts pixels that have not been rendered at infinity. I was rather
surprised to see fog in my test scene, but it depended on my position
relative to the origin, so something was definitely off (the pixels were
at the origin).
This commit is contained in:
Bill Currie 2024-02-01 11:27:08 +09:00
parent c1b38196d1
commit 085f56367d
2 changed files with 5 additions and 2 deletions
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3
libs/video/renderer/vulkan/rp_main_def.plist
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@ -2074,6 +2074,9 @@ renderpasses = {
@inherit = $attachment_base;
format = $images.cube_position.format;
view = cube_position;
clearValue = {
color = { int32 = ( 0, 0, 0, 0); };
};
};
light = {
@inherit = $attachment_base;

4
libs/video/renderer/vulkan/shader/compose.frag
View file

@ -25,10 +25,10 @@ main (void)
vec3 c = subpassLoad (color).rgb;
vec3 l = subpassLoad (light).rgb;
vec3 e = subpassLoad (emission).rgb;
vec3 p = subpassLoad (position).xyz;
vec4 p = subpassLoad (position);
vec3 o = max(BlendFrags (vec4 (c * l + e, 1)).xyz, vec3(0));
float d = length (p - camera.xyz);
float d = p.w > 0 ? length (p.xyz - camera.xyz) : 1e36;
o = FogBlend (vec4(o,1), fog, d).xyz;
o = pow (o, vec3(0.83));//FIXME make gamma correction configurable
frag_color = vec4 (o, 1);