More light culling fixes

res/shaders/LightCulling.slang

@@ -99,7 +99,7 @@ void cullLights(ComputeShaderInput in)
     {
         PointLight light = pLightEnv.pointLights[i];
         //TODO: why doesn't this check go through?
-        if(light.insideFrustum(groupFrustum, nearClipVS, maxDepthVS))
+        if(light.insideFrustum(groupFrustum, nearClipVS))
         {
             tAppendLight(i);
             if(!light.insidePlane(minPlane))

res/shaders/MeshletBasePass.slang

@@ -51,7 +51,7 @@ void taskMain(
 		{
 			uint m = mesh.meshletOffset + i;
 			MeshletDescription meshlet = pScene.meshletInfos[m];
-			//if(meshlet.boundingBox.insideFrustum(localToClip, viewFrustum))
+			if(meshlet.boundingBox.insideFrustum(localToClip, viewFrustum))
 			{
 				uint index;
 				InterlockedAdd(head, 1, index);

res/shaders/lib/Common.slang

@@ -39,13 +39,13 @@ struct Frustum
     Plane basePlane;
     bool pointInside(float3 point)
     {
-        if (basePlane.pointInside(point))
+        if (!basePlane.pointInside(point))
         {
             return false;
         }
         for(int p = 0; p < 4; ++p)
         {
-            if(sides[p].pointInside(point))
+            if(!sides[p].pointInside(point))
             {
                 return false;
             }

res/shaders/lib/LightEnv.slang

@@ -33,21 +33,29 @@ struct PointLight : ILightEnv
         return illuminance * brdf.evaluate(params.tbn, params.viewDir_TS, normalize(lightDir_TS), colorRange.xyz);
     }
 
-    bool insidePlane(Plane plane, float3 position_CS)
+    bool insidePlane(Plane plane, float3 center_CS)
     {
+        float3 position_CS = center_CS + plane.n * colorRange.w;
         return plane.pointInside(position_CS);
     }
 
-    bool insideFrustum(Frustum frustum)
+    bool insideFrustum(Frustum frustum, float nearClipVS, float maxDepthVS)
     {
-        bool result = true;
         float4 clipPos = mul(pViewParams.projectionMatrix, mul(pViewParams.viewMatrix, position_WS));
-        float3 position_CS = clipPos.xyz / clipPos.w;
+        float3 center_CS = clipPos.xyz / clipPos.w;
+        if(insidePlane(frustum.basePlane, center_CS))
+        {
+            return true;
+        }
+        uint result = 0;
         for(int i = 0; i < 4; ++i)
         {
-            
+            if(insidePlane(frustum.sides[i], center_CS))
+            {
+                result++;
             }
-        return result;
+        }
+        return result > 0;
     }
 };