workaround for incorrect ray intersections with open cones

Author: plexoos

CSG/csg_intersect_leaf_newcone.h

@@ -100,24 +100,13 @@ void intersect_leaf_newcone( bool& valid_isect, float4& isect, const quad& q0, c
     const float4 roots = make_float4( t_near, t_far, t_cap1, t_cap2 );
     const float t_cand = fminf(roots) ; 
 
-    valid_isect = t_cand > t_min && t_cand < RT_DEFAULT_MAX ;
-    if(valid_isect)
-    {
-        if( t_cand == t_cap1 || t_cand == t_cap2 )
-        {
-            isect.x = 0.f ; 
-            isect.y = 0.f ;
-            isect.z = t_cand == t_cap2 ? 1.f : -1.f  ;   
-        }
-        else
-        { 
-            float3 n = normalize(make_float3( o.x+t_cand*d.x, o.y+t_cand*d.y, (z0-(o.z+t_cand*d.z))*tth2  ))  ; 
-            isect.x = n.x ; 
-            isect.y = n.y ;
-            isect.z = n.z ; 
-        }
-        isect.w = t_cand ; 
-    }
+    float3 intersection_point = make_float3(o.x + t_cand * d.x, o.y + t_cand * d.y, o.z + t_cand * d.z);
+    float3 n = normalize(make_float3(intersection_point.x, intersection_point.y, (z0 - intersection_point.z)*tth2));
+
+    isect.x = n.x;
+    isect.y = n.y;
+    isect.z = n.z;
+    isect.w = t_cand;
 }