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Adds soft shadows to vk_raytrace

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Magnus Norddahl 2022-12-05 23:38:58 +01:00 committed by Rachael Alexanderson
parent 269431575b
commit 8bcdbc230d
1 changed files with 62 additions and 10 deletions
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72
wadsrc/static/shaders/glsl/main.fp
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@ -347,25 +347,77 @@ float R_DoomLightingEquation(float light)
#ifdef SUPPORTS_RAYTRACING
bool traceHit(vec3 origin, vec3 direction, float dist)
{
rayQueryEXT rayQuery;
rayQueryInitializeEXT(rayQuery, TopLevelAS, gl_RayFlagsTerminateOnFirstHitEXT, 0xFF, origin, 0.01f, direction, dist);
while(rayQueryProceedEXT(rayQuery)) { }
return rayQueryGetIntersectionTypeEXT(rayQuery, true) != gl_RayQueryCommittedIntersectionNoneEXT;
}
vec2 softshadow[9 * 3] = vec2[](
vec2( 0.0, 0.0),
vec2(-2.0,-2.0),
vec2( 2.0, 2.0),
vec2( 2.0,-2.0),
vec2(-2.0, 2.0),
vec2(-1.0,-1.0),
vec2( 1.0, 1.0),
vec2( 1.0,-1.0),
vec2(-1.0, 1.0),
vec2( 0.0, 0.0),
vec2(-1.5,-1.5),
vec2( 1.5, 1.5),
vec2( 1.5,-1.5),
vec2(-1.5, 1.5),
vec2(-0.5,-0.5),
vec2( 0.5, 0.5),
vec2( 0.5,-0.5),
vec2(-0.5, 0.5),
vec2( 0.0, 0.0),
vec2(-1.25,-1.75),
vec2( 1.75, 1.25),
vec2( 1.25,-1.75),
vec2(-1.75, 1.75),
vec2(-0.75,-0.25),
vec2( 0.25, 0.75),
vec2( 0.75,-0.25),
vec2(-0.25, 0.75)
);
float shadowAttenuation(vec4 lightpos, float lightcolorA)
{
float shadowIndex = abs(lightcolorA) - 1.0;
if (shadowIndex >= 1024.0)
return 1.0; // Don't cast rays for this light
vec3 origin = pixelpos.xzy;
vec3 direction = normalize(lightpos.xzy - pixelpos.xzy);
float lightDistance = distance(pixelpos.xzy, lightpos.xzy);
vec3 target = lightpos.xzy + 0.01; // nudge light position slightly as Doom maps tend to have their lights perfectly aligned with planes
rayQueryEXT rayQuery;
rayQueryInitializeEXT(rayQuery, TopLevelAS, gl_RayFlagsTerminateOnFirstHitEXT, 0xFF, origin, 0.01f, direction, lightDistance);
vec3 direction = normalize(target - origin);
float dist = distance(origin, target);
while(rayQueryProceedEXT(rayQuery))
if (uShadowmapFilter <= 0)
{
return traceHit(origin, direction, dist) ? 0.0 : 1.0;
}
if (rayQueryGetIntersectionTypeEXT(rayQuery, true) != gl_RayQueryCommittedIntersectionNoneEXT)
else
{
return 0.0;
}
vec3 v = (abs(direction.x) > abs(direction.y)) ? vec3(0.0, 1.0, 0.0) : vec3(1.0, 0.0, 0.0);
vec3 xdir = normalize(cross(direction, v));
vec3 ydir = cross(direction, xdir);
return 1.0;
float sum = 0.0;
int step_count = uShadowmapFilter * 9;
for (int i = 0; i <= step_count; i++)
{
vec3 pos = target + xdir * softshadow[i].x + ydir * softshadow[i].y;
sum += traceHit(origin, normalize(pos - origin), dist) ? 0.0 : 1.0;
}
return sum / step_count;
}
}
#else