bool IsShadowed(int currPrimitiveNum, Ray &rayToLight, float distanceToLight, Primitive *primitives, int numPrimitives)
{
TraceResult traceResult;
traceResult.hit=false;
// check all spheres
for(int i=0; i<numPrimitives; i++)
{
if( i == currPrimitiveNum ) continue;//no auto
switch(primitives[i].type)
{
case SPHERE_TYPE:
traceResult = IntersectSphere(*primitives[i].sphereProperties, rayToLight);
break;
case PLANE_TYPE:
traceResult = IntersectPlane(*primitives[i].planeProperties, rayToLight);
break;
case CYLINDER_TYPE:
traceResult = IntersectCylinder(*primitives[i].cylinderProperties, rayToLight);
break;
case TRIANGLE_TYPE:
traceResult = IntersectTriangle(*primitives[i].triangleProperties, rayToLight);
break;
default:
continue;
break;
}
if( traceResult.hit && (traceResult.distance < distanceToLight) )
return true;
}
return false;
}
void KDTree::TraversalRope(KDTreeNode *N, Ray &ray,Point3 ray_Pos)
{
if(N==NULL)
return ;
N = findLeaf(N,ray_Pos);
Intersect(N->m_List->GetHead(),ray);
Point3 Pos[8];
Point3 hitPoint;
int i;
GetBoxVertex(N->box,Pos);
for(i=0;i<6;i++)
if(IntersectPlane(ray,ray_Pos,Pos[index[i][0]],Pos[index[i][1]],Pos[index[i][2]],Pos[index[i][3]],hitPoint))
break;
if(i>5)
i++;
ray_Pos = hitPoint;
N = N->ropes[i];
TraversalRope(N,ray,ray_Pos);
}