source: GTP/trunk/Lib/Vis/Preprocessing/src/InternalRayCaster.cpp @ 1521

#include "InternalRayCaster.h"
#include "VssRay.h"
#include "KdTree.h"
#include "Preprocessor.h"

#define DEBUG_RAYCAST 0


namespace GtpVisibilityPreprocessor {


InternalRayCaster::InternalRayCaster(const Preprocessor &preprocessor, KdTree *kdTree):
RayCaster(preprocessor), mKdTree(kdTree)
{
}


InternalRayCaster::~InternalRayCaster()
{
}


int InternalRayCaster::CastRay(const Vector3 &viewPoint,
                                                           const Vector3 &direction,
                                                           const float probability,
                                                           VssRayContainer &vssRays,
                                                           const AxisAlignedBox3 &box,
                                                           const bool castDoubleRay
                                                           )
{
        //cout << "internal ray" << endl;
        int hits = 0;
        static Ray ray;
        Intersectable *objectA = NULL, *objectB = NULL;
        Vector3 pointA, pointB;
        Vector3 normalA, normalB;

#if 0
        AxisAlignedBox3 sbox = box;
        sbox.Enlarge(Vector3(-Limits::Small));
        if (!sbox.IsInside(viewPoint))
                return 0;
#endif

        mPreprocessor.SetupRay(ray, viewPoint, direction);
        ray.mFlags &= ~Ray::CULL_BACKFACES;

        if (mKdTree->CastRay(ray)) 
        {
                objectA = ray.intersections[0].mObject;
                pointA = ray.Extrap(ray.intersections[0].mT);
                normalA = ray.intersections[0].mNormal;
        }
        
        mPreprocessor.SetupRay(ray, viewPoint, -direction);
        ray.mFlags &= ~Ray::CULL_BACKFACES;

        if (castDoubleRay && mKdTree->CastRay(ray)) 
        {
                objectB = ray.intersections[0].mObject;
                pointB = ray.Extrap(ray.intersections[0].mT);
                normalB = ray.intersections[0].mNormal;
        }
        
        return ProcessRay(
                viewPoint,
                direction,
                objectA, pointA, normalA,
                objectB, pointB, normalB,
                probability,
                vssRays,
                box
                );
}


void InternalRayCaster::CastRays16(const int index,
                                                                   SimpleRayContainer &rays, 
                                                                   VssRayContainer &vssRays,
                                                                   const AxisAlignedBox3 &sbox,
                                                                   const bool castDoubleRays)
{
        const int num = 16;

#if DEBUG_RAYCAST
        Debug<<"C16 "<<flush;
#endif

        // no acceleration for ray bundles implemented right now
        for (int i=index; i < index + num; i++) 
        {
                CastRay(rays[i].mOrigin,
                        rays[i].mDirection,
                        rays[i].mPdf,
                        vssRays,
                        sbox,
                        castDoubleRays);
        }

#if DEBUG_RAYCAST
        Debug<<"C16F\n"<<flush;
#endif
}

}