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rt backface culling

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Dynamitos
2025-01-29 21:55:11 +01:00
parent 09660ab642
commit 44b147084b
7 changed files with 65 additions and 25 deletions
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res/shaders/raytracing/ClosestHit.slang
+24 -20
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@@ -71,7 +71,11 @@ import MATERIAL_FILE_NAME;
*/
static const float eps = 1e-5;
const static float ka = 0;
const static float ks = 0;
const static float3 fogEmm = float3(0, 0.01, 0.01);
const static float eps = 1e-5;
[shader("closesthit")]
void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttributes attr)
{
@@ -116,15 +120,15 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
float3 rnd = rand01(hitValue.rndSeed);
//float kt = ka + ks;
//float s = -log(rnd.z) / kt;
//float3 xs = r.o + s * r.d;
//if (s < t) {
//if (s < RayTCurrent()) {
// float3 xs = WorldRayOrigin() + s * WorldRayDirection();
// float p = kt * rnd.z;
// if (depth > 5) {
// if (rnd.z >= p) break;
// else accmat /= p;
// if (hitValue.depth > 5) {
// if (rnd.z >= p) return;
// else brdf.baseColor /= p;
// }
// float3 ldirect = nextEventEstimation(accmat, r.d, xs, -r.d, kt, true, rnd);
// accrad += (fogEmm + ks * ldirect) / kt;
// float3 ldirect = nextEventEstimation(brdf.baseColor, WorldRayDirection(), xs, -WorldRayDirection(), kt, true, rnd);
// hitValue.light += (fogEmm + ks * ldirect) / kt;
// accmat *= ks / kt;
// rayDesc.Origin = xs;
// rayDesc.Direction = float3(
@@ -132,14 +136,13 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
// sin(2*PI*rnd.x)*sqrt(1-rnd.y*rnd.y),
// rnd.y
// );
// continue;
// TraceRay(scene, 0, 0xff, 0, 0, rayDesc);
//}
//float p = max(max(brdf.baseColor.x, brdf.baseColor.y), brdf.baseColor.z);
//if(hitValue.depth > 5) {
// if (rnd.z >= p) return;
// else hitValue.accmat /= p;
//}
float p = max(max(brdf.baseColor.x, brdf.baseColor.y), brdf.baseColor.z);
if(hitValue.depth > 5) {
if (rnd.z >= p) return;
}
hitValue.light += brdf.emissive * hitValue.emissive + brdf.evaluateAmbient();
//-- Ideal DIFFUSE reflection
@@ -160,12 +163,12 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
payload.anyHit = true;
payload.hit = false;
payload.rndSeed = hitValue.rndSeed;
TraceRay(pRayTracingParams.scene, 0, 0xff, 0, 0, 0, rayDesc, payload);
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES, 0xff, 0, 0, 0, rayDesc, payload);
// we have missed all geometry, so directional light is affecting us
//if(!payload.hit) {
//hitValue.light += pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
//}
if(!payload.hit) {
hitValue.light += pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
}
}
for(uint i = 0; i < pLightEnv.numPointLights; ++i) {
RayPayload payload;
@@ -180,7 +183,7 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
rayDesc.TMin = eps;
rayDesc.Origin = x;
rayDesc.Direction = l;
TraceRay(pRayTracingParams.scene, 0, 0xff, 0, 0, 0, rayDesc, payload);
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES, 0xff, 0, 0, 0, rayDesc, payload);
// hitting only after the light
if(!payload.hit) {
@@ -206,8 +209,9 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
payload.depth = hitValue.depth;
payload.anyHit = false;
payload.rndSeed = hitValue.rndSeed + 1;
TraceRay(pRayTracingParams.scene, 0, 0xff, 0, 0, 0, rayDesc, payload);
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES, 0xff, 0, 0, 0, rayDesc, payload);
float bias = dot(normalLight_WS, rayDesc.Direction);
hitValue.light += brdf.evaluate(params.getTangentToWorld(), -WorldRayDirection(), rayDesc.Direction, payload.light / bias);
}
hitValue.light /= p;
}