void Ray::SetFlags(RayType rt, const Ray& other)
{
primaryRay = (rt == PrimaryRay);
reflectionRay = (rt == ReflectionRay) || ((rt == RefractionRay) && other.IsReflectionRay()); // TODO FIXME - just a kludge for now! [CLi]
refractionRay = (rt == RefractionRay) || ((rt == ReflectionRay) && other.IsRefractionRay()); // TODO FIXME - just a kludge for now! [CLi]
subsurfaceRay = (rt == SubsurfaceRay);
shadowTestRay = other.IsShadowTestRay();
photonRay = other.IsPhotonRay();
radiosityRay = other.IsRadiosityRay();
monochromaticRay = other.IsMonochromaticRay();
pretraceRay = other.IsPretraceRay();
}
bool IsoSurface::All_Intersections(const Ray& ray, IStack& Depth_Stack, TraceThreadData *Thread)
{
int Side1 = 0, Side2 = 0, itrace = 0;
DBL Depth1 = 0.0, Depth2 = 0.0;
BasicRay New_Ray;
Vector3d IPoint;
Vector3d Plocal, Dlocal;
DBL tmax = 0.0, tmin = 0.0, tmp = 0.0;
DBL maxg = max_gradient;
int i = 0 ; /* count of intervals in stack - 1 */
int IFound = false;
int begin = 0, end = 0;
bool in_shadow_test = false;
Vector3d VTmp;
Thread->Stats()[Ray_IsoSurface_Bound_Tests]++;
if(container->Intersect(ray, Trans, Depth1, Depth2, Side1, Side2)) /* IsoSurface_Bound_Tests */
{
Thread->Stats()[Ray_IsoSurface_Bound_Tests_Succeeded]++;
in_shadow_test = ray.IsShadowTestRay();
if(Depth1 < 0.0)
Depth1 = 0.0;
if(Trans != NULL)
{
MInvTransPoint(Plocal, ray.Origin, Trans);
MInvTransDirection(Dlocal, ray.Direction, Trans);
}
else
{
Plocal = ray.Origin;
Dlocal = ray.Direction;
}
Thread->isosurfaceData->Inv3 = 1;
if(closed != false)
{
VTmp = Plocal + Depth1 * Dlocal;
tmp = Vector_Function(Thread->functionContext, VTmp);
if(Depth1 > accuracy)
{
if(tmp < 0.0) /* The ray hits the bounding shape */
{
IPoint = ray.Evaluate(Depth1);
if(Clip.empty() || Point_In_Clip(IPoint, Clip, Thread))
{
Depth_Stack->push(Intersection(Depth1, IPoint, this, 1, Side1));
IFound = true;
itrace++;
Thread->isosurfaceData->Inv3 *= -1;
}
}
}
else
{
if(tmp < (maxg * accuracy * 4.0))
{
Depth1 = accuracy * 5.0;
VTmp = Plocal + Depth1 * Dlocal;
if(Vector_Function(Thread->functionContext, VTmp) < 0)
Thread->isosurfaceData->Inv3 = -1;
/* Change the sign of the function (IPoint is in the bounding shpae.)*/
}
VTmp = Plocal + Depth2 * Dlocal;
if(Vector_Function(Thread->functionContext, VTmp) < 0.0)
{
IPoint = ray.Evaluate(Depth2);
if(Clip.empty() || Point_In_Clip(IPoint, Clip, Thread))
{
Depth_Stack->push(Intersection(Depth2, IPoint, this, 1, Side2));
IFound = true;
}
}
}
}
/* METHOD 2 by R. Suzuki */
tmax = Depth2 = min(Depth2, BOUND_HUGE);
tmin = Depth1 = min(Depth2, Depth1);
if((tmax - tmin) < accuracy)
{
if (IFound)
Depth_Stack->pop(); // we added an intersection already, so we need to undo that
return (false);
}
Thread->Stats()[Ray_IsoSurface_Tests]++;
if((Depth1 < accuracy) && (Thread->isosurfaceData->Inv3 == 1))
{
/* IPoint is on the isosurface */
VTmp = Plocal + tmin * Dlocal;
if(fabs(Vector_Function(Thread->functionContext, VTmp)) < (maxg * accuracy * 4.0))
{
tmin = accuracy * 5.0;
VTmp = Plocal + tmin * Dlocal;
if(Vector_Function(Thread->functionContext, VTmp) < 0)
Thread->isosurfaceData->Inv3 = -1;
/* change the sign and go into the isosurface */
}
}
Thread->isosurfaceData->ctx = Thread->functionContext;
for (; itrace < max_trace; itrace++)
{
if(Function_Find_Root(*(Thread->isosurfaceData), Plocal, Dlocal, &tmin, &tmax, maxg, in_shadow_test, Thread) == false)
break;
else
{
IPoint = ray.Evaluate(tmin);
if(Clip.empty() || Point_In_Clip(IPoint, Clip, Thread))
{
Depth_Stack->push(Intersection(tmin, IPoint, this, 0, 0 /*Side1*/));
IFound = true;
}
}
tmin += accuracy * 5.0;
if((tmax - tmin) < accuracy)
break;
Thread->isosurfaceData->Inv3 *= -1;
}
if(IFound)
Thread->Stats()[Ray_IsoSurface_Tests_Succeeded]++;
}
if(eval == true)
{
DBL temp_max_gradient = max_gradient; // TODO FIXME - works around nasty gcc (found using 4.0.1) bug failing to honor casting away of volatile on pass by value on template argument lookup [trf]
max_gradient = max((DBL)temp_max_gradient, maxg); // TODO FIXME - This is not thread-safe but should be!!! [trf]
}
return (IFound);
}