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shader adjustments

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This commit is contained in:
Dynamitos
2026-03-15 22:37:08 +01:00
parent cd0f6d038f
commit 9109baad18
10 changed files with 172 additions and 105 deletions
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external/vcpkg
Vendored
+1 -1
Submodule external/vcpkg updated: ce35b1a53a...f9a99aa79c
res/shaders/BasePass.slang
+8 -8
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@@ -65,12 +65,12 @@ float4 fragmentMain(in FragmentParameter params) : SV_Target
float shadowFactor = 0.0f;
int count = 0;
int range = 1;
//for (int x = -range; x <= range; ++x) {
// for (int y = -range; y <= range; ++y) {
for (int x = -range; x <= range; ++x) {
for (int y = -range; y <= range; ++y) {
float shadow = 1.0f;
if (currentDepth > 0.0 && currentDepth < 1.0)
{
float dist = pShadowMapping.shadowMaps[cascadeIndex].Sample(pShadowMapping.shadowSampler, float3(shadowCoord.xy, i)).r;
float dist = pShadowMapping.shadowMaps[cascadeIndex].Sample(pShadowMapping.shadowSampler, float3(shadowCoord.xy + float2(dx * x, dy * y), i)).r;
if (shadowCoord.w > 0 && currentDepth < dist)
{
shadow = 0;
@@ -78,16 +78,16 @@ float4 fragmentMain(in FragmentParameter params) : SV_Target
}
shadowFactor += shadow;
count++;
// }
//}
}
}
result = (shadowFactor / count) * pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
}
for (uint i = 0; i < pLightEnv.numPointLights; ++i)
{
//uint lightIndex = pLightCullingData.lightIndexList[startOffset + i];
//result += pLightEnv.pointLights[i].illuminate(lightingParams, brdf);
uint lightIndex = pLightCullingData.lightIndexList[startOffset + i];
result += pLightEnv.pointLights[lightIndex].illuminate(lightingParams, brdf);
}
//result += brdf.evaluateAmbient(lightingParams.viewDir_WS);
result += brdf.evaluateAmbient(lightingParams.viewDir_WS);
return float4(result, brdf.getAlpha());
}
res/shaders/ComputeFrustums.slang
+1
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@@ -1,4 +1,5 @@
import Common;
import Frustum;
import DispatchParams;
struct ComputeShaderInput
res/shaders/DepthCullingTask.slang
+1
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@@ -2,6 +2,7 @@ import Common;
import Scene;
import Bounding;
import DepthCommon;
import Frustum;
groupshared MeshPayload p;
groupshared uint head;
res/shaders/LightCulling.slang
+1
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@@ -1,6 +1,7 @@
import Common;
import DispatchParams;
import LightEnv;
import Frustum;
struct ComputeShaderInput
{
res/shaders/lib/Bounding.slang
+1
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@@ -1,4 +1,5 @@
import Common;
import Frustum;
struct BoundingSphere
{
res/shaders/lib/DispatchParams.slang
+1
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@@ -1,4 +1,5 @@
import Common;
import Frustum;
struct DispatchParams
{
res/shaders/lib/LightEnv.slang
+11
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@@ -1,5 +1,6 @@
import Common;
import MaterialParameter;
import Frustum;
interface ILightEnv
{
@@ -81,6 +82,8 @@ interface IBRDF
float3 evaluateAmbient(float3 viewDir_WS);
float getAlpha();
float3 getEmissive();
float getRoughness();
float getMetallic();
[mutating] void setNormal(float3 n);
};
@@ -134,6 +137,8 @@ struct Phong : IBRDF
{
return emissive;
}
float getRoughness() { return pow(2.0 / (shininess + 2.0), 0.25); }
float getMetallic() { return 0; }
[mutating] void setNormal(float3 n) { normal = n; }
};
@@ -187,6 +192,8 @@ struct BlinnPhong : IBRDF
{
return emissive;
}
float getRoughness() { return pow(2.0 / (shininess + 2.0), 0.25); }
float getMetallic() { return 0; }
[mutating] void setNormal(float3 n) { normal = n; }
};
@@ -240,6 +247,8 @@ struct CelShading : IBRDF
{
return emissive;
}
float getRoughness() { return 1.0; }
float getMetallic() { return 0; }
[mutating] void setNormal(float3 n) { normal = n; }
};
@@ -364,5 +373,7 @@ struct CookTorrance : IBRDF
{
return emissive;
}
float getRoughness() { return roughness; }
float getMetallic() { return metallic; }
[mutating] void setNormal(float3 n) { normal = n; }
};
res/shaders/raytracing/ClosestHit.slang
+146 -95
View File
@@ -19,20 +19,17 @@ import MATERIAL_FILE_NAME;
// Direct Illumination: Next Event Estimation over any present lights
for (int i = spheres.length(); i-->0;) {
Sphere ls = spheres[i];
if (all(equal(ls.e, vec3(0)))) continue; // skip non-emissive spheres
if (all(equal(ls.e, vec3(0)))) continue; // skip non-emissive spheres
vec3 xc = ls.geo.xyz - x;
vec3 sw = normalize(xc), su = normalize(cross((abs(sw.x)>.1 ? vec3(0,1,0) : vec3(1,0,0)), sw)), sv = cross(sw,su);
float cos_a_max = sqrt(float(1 - ls.geo.w*ls.geo.w / dot(xc,xc)));
float cos_a = 1 - rnd.x + rnd.x*cos_a_max, sin_a = sqrt(1 - cos_a*cos_a);
float phi = 2 * pi * rnd.y;
vec3 l = normalize(su*cos(phi)*sin_a + sv*sin(phi)*sin_a + sw*cos_a); // sampled direction towards light
if (intersect(Ray(x,l), matls, paramsls, sphereId, triId) && sphereId == i) { // test if shadow ray hits this light source
float omega = 2 * pi * (1-cos_a_max);
if(useAtt) {
float tau = exp(-kt * length(x - paramsls.x));
result += max(dot(l,nl),0) * ls.e * omega * tau;
} else {
result += accmat / pi * max(dot(l,nl),0) * ls.e * omega; // brdf term obj.c.xyz already in accmat, 1/pi for brdf
if (intersect(Ray(x,l), matls, paramsls, sphereId, triId) && sphereId == i) { // test if shadow ray hits this light
source float omega = 2 * pi * (1-cos_a_max); if(useAtt) { float tau = exp(-kt * length(x - paramsls.x)); result += max(dot(l,nl),0) *
ls.e * omega * tau; } else { result += accmat / pi * max(dot(l,nl),0) * ls.e * omega; // brdf term obj.c.xyz already in accmat, 1/pi
for brdf
}
}
}
@@ -78,11 +75,10 @@ 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)
{
void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttributes attr) {
hitValue.hit = true;
// todo: replace with anyhit shader
if(hitValue.anyHit)
if (hitValue.anyHit)
return;
const float3 barycentricCoords = float3(1.0f - attr.barycentrics.x - attr.barycentrics.y, attr.barycentrics.x, attr.barycentrics.y);
@@ -111,112 +107,167 @@ void closestHit(inout RayPayload hitValue, in BuiltInTriangleIntersectionAttribu
hitValue.params = params.getLightingParameter();
hitValue.materialParams = params.getMaterialParameter();
LightingParameter lightingParams = hitValue.params;
lightingParams.viewDir_WS = -WorldRayDirection();
let brdf = Material.prepare(hitValue.materialParams);
float3 normal_WS = brdf.getNormal();
float3 normalLight_WS = dot(normal_WS,WorldRayDirection())<0 ? normal_WS : -normal_WS;
float3 normalLight_WS = dot(normal_WS, WorldRayDirection()) < 0 ? normal_WS : -normal_WS;
float3 intersection_WS = lightingParams.position_WS;
hitValue.depth++;
float3 rnd = rand01(hitValue.rndSeed);
//float kt = ka + ks;
//float s = -log(rnd.z) / kt;
//if (s < RayTCurrent()) {
// float kt = ka + ks;
// float s = -log(rnd.z) / kt;
// if (s < RayTCurrent()) {
// float3 xs = WorldRayOrigin() + s * WorldRayDirection();
// float p = kt * rnd.z;
// if (hitValue.depth > 5) {
// if (rnd.z >= p) return;
// else brdf.baseColor /= p;
// }
// 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(
// cos(2*PI*rnd.x)*sqrt(1-rnd.y*rnd.y),
// sin(2*PI*rnd.x)*sqrt(1-rnd.y*rnd.y),
// rnd.y
// );
// TraceRay(scene, 0, 0xff, 0, 0, rayDesc);
//}
// float p = kt * rnd.z;
// if (hitValue.depth > 5) {
// if (rnd.z >= p) return;
// else brdf.baseColor /= p;
// }
// 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(
// cos(2*PI*rnd.x)*sqrt(1-rnd.y*rnd.y),
// sin(2*PI*rnd.x)*sqrt(1-rnd.y*rnd.y),
// rnd.y
// );
// TraceRay(scene, 0, 0xff, 0, 0, rayDesc);
// }
float p = max(max(brdf.getBaseColor().x, brdf.getBaseColor().y), brdf.getBaseColor().z);
if(hitValue.depth > 5) {
if (rnd.z >= p) return;
if (hitValue.depth > 5) {
if (rnd.z >= p)
return;
}
hitValue.light += brdf.getEmissive() * hitValue.emissive + brdf.evaluateAmbient(lightingParams.viewDir_WS);
//-- Ideal DIFFUSE reflection
//if(bool(useNEE)) {
// if(bool(useNEE)) {
// accrad += nextEventEstimation(accmat, r.d, params.x, params.nl, kt, false, rnd);
//}
for(uint i = 0; i < pLightEnv.numDirectionalLights; ++i) {
float3 x = intersection_WS;
float3 l = -pLightEnv.directionalLights[i].direction.xyz;
RayDesc rayDesc;
rayDesc.TMax = 10000.0f;
rayDesc.TMin = eps;
rayDesc.Origin = x;
rayDesc.Direction = l;
RayPayload payload;
payload.depth = hitValue.depth;
payload.emissive = 1;
payload.anyHit = true;
payload.hit = false;
payload.rndSeed = hitValue.rndSeed;
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH, 0xff, 0, 0, 0, rayDesc, payload);
// Only trace shadow rays for direct lighting at shallow depths
if (hitValue.depth <= 3) {
for (uint i = 0; i < pLightEnv.numDirectionalLights; ++i) {
float3 x = intersection_WS;
float3 l = -pLightEnv.directionalLights[i].direction.xyz;
RayDesc rayDesc;
rayDesc.TMax = 10000.0f;
rayDesc.TMin = eps;
rayDesc.Origin = x;
rayDesc.Direction = l;
RayPayload payload;
payload.depth = hitValue.depth;
payload.emissive = 1;
payload.anyHit = true;
payload.hit = false;
payload.rndSeed = hitValue.rndSeed;
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH, 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);
// we have missed all geometry, so directional light is affecting us
if (!payload.hit) {
hitValue.light += pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
}
}
}
for(uint i = 0; i < pLightEnv.numPointLights; ++i) {
RayPayload payload;
payload.rndSeed = hitValue.rndSeed;
float3 x = intersection_WS;
float3 l = pLightEnv.pointLights[i].position_WS.xyz - intersection_WS;
if(length(l) > pLightEnv.pointLights[i].colorRange.w) {
continue;
for (uint i = 0; i < pLightEnv.numPointLights; ++i) {
RayPayload payload;
payload.rndSeed = hitValue.rndSeed;
float3 x = intersection_WS;
float3 l = pLightEnv.pointLights[i].position_WS.xyz - intersection_WS;
if (length(l) > pLightEnv.pointLights[i].colorRange.w) {
continue;
}
RayDesc rayDesc;
rayDesc.TMax = 1.0f;
rayDesc.TMin = eps;
rayDesc.Origin = x;
rayDesc.Direction = l;
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH, 0xff, 0, 0, 0,
rayDesc, payload);
// hitting only after the light
if (!payload.hit) {
hitValue.light += pLightEnv.pointLights[i].illuminate(lightingParams, brdf);
}
}
RayDesc rayDesc;
rayDesc.TMax = 1.0f;
rayDesc.TMin = eps;
rayDesc.Origin = x;
rayDesc.Direction = l;
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES | RAY_FLAG_ACCEPT_FIRST_HIT_AND_END_SEARCH, 0xff, 0, 0, 0, rayDesc, payload);
// hitting only after the light
if(!payload.hit) {
hitValue.light += pLightEnv.pointLights[i].illuminate(lightingParams, brdf);
}
}
// Indirect Illumination: cosine-weighted importance sampling
if(hitValue.depth < 1) {
float r1 = 2 * PI * rnd.x, r2 = rnd.y, r2s = sqrt(r2);
float3 w = normalLight_WS;
float3 u = normalize(cross(abs(w.x)>0.1 ? float3(0,1,0) : float3(1,0,0), w));
float3 v = cross(w,u);
} // end depth <= 2 direct lighting guard
// Indirect Illumination: probabilistic diffuse/specular importance sampling
if (hitValue.depth < 3) {
float3 V = -WorldRayDirection();
float3 N = normalLight_WS;
float rough = brdf.getRoughness();
float met = brdf.getMetallic();
float3 F0 = lerp(float3(0.04), brdf.getBaseColor(), met);
float NdotV = max(dot(N, V), 0.001);
float3 F = F0 + (1 - F0) * pow(1 - NdotV, 5.0);
float specProb = clamp((F.x + F.y + F.z) / 3.0, 0.1, 0.9);
RayDesc rayDesc;
rayDesc.TMax = 10000.0f;
rayDesc.TMin = eps;
rayDesc.Origin = intersection_WS;
rayDesc.Direction = normalize(u*cos(r1)*r2s + v * sin(r1)*r2s + w * sqrt(1 - r2));
RayPayload payload;
payload.light = float3(0);
payload.emissive = 1;
payload.hit = false;
//payload.emissive = 0; // in the next bounce, consider reflective part only!
payload.depth = hitValue.depth;
payload.anyHit = false;
payload.rndSeed = hitValue.rndSeed + 1;
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(-WorldRayDirection(), rayDesc.Direction, payload.light / bias);
}
//hitValue.light /= p;
}
float3 bounceWeight = float3(0);
bool validBounce = true;
if (rnd.z < specProb) {
// GGX importance sampling for specular reflection
float a = max(rough * rough, 0.001);
float a2 = a * a;
float phi = 2.0 * PI * rnd.x;
float cosTheta = sqrt((1.0 - rnd.y) / (1.0 + (a2 - 1.0) * rnd.y));
float sinTheta = sqrt(1.0 - cosTheta * cosTheta);
float3 u = normalize(cross(abs(N.x) > 0.1 ? float3(0, 1, 0) : float3(1, 0, 0), N));
float3 v = cross(N, u);
float3 H = normalize(u * cos(phi) * sinTheta + v * sin(phi) * sinTheta + N * cosTheta);
float3 L = reflect(-V, H);
rayDesc.Direction = L;
float NdotL = dot(N, L);
float NdotH = max(dot(N, H), 0.0);
float VdotH = max(dot(V, H), 0.0);
if (NdotL <= 0) {
validBounce = false;
} else {
// Smith G term
float k = (rough + 1);
k = (k * k) / 8;
float G = (NdotV / (NdotV * (1 - k) + k)) * (NdotL / (NdotL * (1 - k) + k));
// Fresnel at half-vector
float3 Fh = F0 + (max(float3(1.0 - rough), F0) - F0) * pow(clamp(1 - VdotH, 0, 1), 5.0);
// Monte Carlo weight: F * G * VdotH / (NdotH * NdotV * specProb)
bounceWeight = Fh * G * VdotH / (NdotH * NdotV * specProb + 0.0001);
}
} else {
// Cosine-weighted importance sampling for diffuse
float r1 = 2 * PI * rnd.x, r2 = rnd.y, r2s = sqrt(r2);
float3 w = N;
float3 u = normalize(cross(abs(w.x) > 0.1 ? float3(0, 1, 0) : float3(1, 0, 0), w));
float3 v = cross(w, u);
rayDesc.Direction = normalize(u * cos(r1) * r2s + v * sin(r1) * r2s + w * sqrt(1 - r2));
// Diffuse weight: kd * baseColor / (1 - specProb)
float3 kd = (1 - F) * (1 - met);
bounceWeight = kd * brdf.getBaseColor() / (1 - specProb);
}
if (validBounce) {
RayPayload payload;
payload.light = float3(0);
payload.hit = false;
payload.emissive = 0;
payload.depth = hitValue.depth;
payload.anyHit = false;
payload.rndSeed = hitValue.rndSeed + 1;
TraceRay(pRayTracingParams.scene, RAY_FLAG_CULL_BACK_FACING_TRIANGLES, 0xff, 0, 0, 0, rayDesc, payload);
hitValue.light += bounceWeight * payload.light;
}
}
// hitValue.light /= p;
}
src/Engine/Graphics/Vulkan/Graphics.cpp
+1 -1
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@@ -819,7 +819,7 @@ void Graphics::pickPhysicalDevice() {
shaderFloatControls = true;
}
}
rayTracingEnabled = false && rayTracingPipelineSupport && accelerationStructureSupport && hostOperationsSupport && deviceAddressSupport &&
rayTracingEnabled = rayTracingPipelineSupport && accelerationStructureSupport && hostOperationsSupport && deviceAddressSupport &&
descriptorIndexingSupport && spirv14Support && shaderFloatControls;
}