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/*
* SimpleLevelLocator.h
*
* Created on: Aug 27, 2015
* Author: swenzel
*/
#ifndef NAVIGATION_SIMPLELEVELLOCATOR_H_
#define NAVIGATION_SIMPLELEVELLOCATOR_H_
#include "VecGeom/navigation/VLevelLocator.h"
#include "VecGeom/volumes/LogicalVolume.h"
#include "VecGeom/navigation/NavigationState.h"
#include "VecGeom/volumes/PlacedAssembly.h"
namespace vecgeom {
inline namespace VECGEOM_IMPL_NAMESPACE {
// shared kernel for many locators
// treats the actual final check (depending on which interface to serve)
template <bool IsAssemblyAware, bool ModifyState>
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
static bool CheckCandidateVol(VPlacedVolume const *nextvolume,
Vector3D<Precision> const &localpoint,
NavigationState *state, VPlacedVolume const *&pvol,
Vector3D<Precision> &daughterlocalpoint)
{
if (IsAssemblyAware && ModifyState) {
if (nextvolume->GetUnplacedVolume()->IsAssembly()) {
// in this case we call a special version of Contains
// offered by the assembly
assert(ModifyState == true);
if (((PlacedAssembly *)nextvolume)->Contains(localpoint, daughterlocalpoint, *state)) {
return true;
}
} else {
if (nextvolume->Contains(localpoint, daughterlocalpoint)) {
state->Push(nextvolume);
return true;
}
}
} else {
if (nextvolume->Contains(localpoint, daughterlocalpoint)) {
if (ModifyState) {
state->Push(nextvolume);
} else {
pvol = nextvolume;
}
return true;
}
}
return false;
}
// shared kernel for many locators
// treats the actual final check (depending on which interface to serve)
template <bool IsAssemblyAware, bool ModifyState>
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
static bool CheckCandidateVolWithDirection(
VPlacedVolume const *nextvolume, Vector3D<Precision> const &localpoint, Vector3D<Precision> const &localdirection,
NavigationState *state, VPlacedVolume const *&pvol, Vector3D<Precision> &daughterlocalpoint)
{
if (IsAssemblyAware && ModifyState) {
/* if (nextvolume->GetUnplacedVolume()->IsAssembly()) { */
/* // in this case we call a special version of Contains */
/* // offered by the assembly */
/* assert(ModifyState == true); */
/* if (((PlacedAssembly *)nextvolume)->Inside(localpoint, daughterlocalpoint, *state)) { */
/* return true; */
/* } */
/* } else { */
/* if (nextvolume->Inside(localpoint, daughterlocalpoint)) { */
/* state->Push(nextvolume); */
/* return true; */
/* } */
/* } */
assert(false && "not implemented yet");
} else {
//
const auto transf = nextvolume->GetTransformation();
const auto testdaughterlocal = transf->Transform(localpoint);
const auto inside = nextvolume->GetUnplacedVolume()->Inside(testdaughterlocal);
auto CheckEntering = [&transf, &testdaughterlocal, &localdirection, &nextvolume]() {
const auto unpl = nextvolume->GetUnplacedVolume();
Vector3D<Precision> normal;
unpl->Normal(testdaughterlocal, normal);
const auto directiondaughterlocal = transf->TransformDirection(localdirection);
const auto dot = normal.Dot(directiondaughterlocal);
if (dot >= 0) {
return false;
}
return true;
};
if (inside == kInside || ((inside == kSurface) && CheckEntering())) {
if (ModifyState) {
state->Push(nextvolume);
daughterlocalpoint = testdaughterlocal;
} else {
pvol = nextvolume;
daughterlocalpoint = testdaughterlocal;
}
return true;
}
}
return false;
}
// a simple version of a LevelLocator offering a generic brute force algorithm
template <bool IsAssemblyAware = false>
class TSimpleLevelLocator : public VLevelLocator {
public:
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
TSimpleLevelLocator() {}
private:
// the actual implementation kernel
// the template "ifs" should be optimized away
// arguments are pointers to allow for nullptr
template <bool ExclV, bool ModifyState>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
bool LevelLocateKernel(LogicalVolume const *lvol, VPlacedVolume const *exclvol,
Vector3D<Precision> const &localpoint, NavigationState *state,
VPlacedVolume const *&pvol,
Vector3D<Precision> &daughterlocalpoint) const
{
auto daughters = lvol->GetDaughtersp();
for (size_t i = 0; i < daughters->size(); ++i) {
VPlacedVolume const *nextvolume = (*daughters)[i];
if (ExclV) {
if (exclvol == nextvolume) continue;
}
if (CheckCandidateVol<IsAssemblyAware, ModifyState>(nextvolume, localpoint, state, pvol, daughterlocalpoint)) {
return true;
}
}
return false;
}
// the actual implementation kernel
// the template "ifs" should be optimized away
// arguments are pointers to allow for nullptr
template <bool ExclV, bool ModifyState>
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
bool LevelLocateKernelWithDirection(LogicalVolume const *lvol,
VPlacedVolume const *exclvol,
Vector3D<Precision> const &localpoint,
Vector3D<Precision> const &localdir,
NavigationState *state, VPlacedVolume const *&pvol,
Vector3D<Precision> &daughterlocalpoint) const
{
auto daughters = lvol->GetDaughtersp();
for (size_t i = 0; i < daughters->size(); ++i) {
VPlacedVolume const *nextvolume = (*daughters)[i];
if (ExclV) {
if (exclvol == nextvolume) continue;
}
if (CheckCandidateVolWithDirection<IsAssemblyAware, ModifyState>(nextvolume, localpoint, localdir, state, pvol,
daughterlocalpoint)) {
return true;
}
}
return false;
}
public:
VECCORE_ATT_HOST_DEVICE
virtual bool LevelLocate(LogicalVolume const *lvol, Vector3D<Precision> const &localpoint, VPlacedVolume const *&pvol,
Vector3D<Precision> &daughterlocalpoint) const override
{
return LevelLocateKernel<false, false>(lvol, nullptr, localpoint, nullptr, pvol, daughterlocalpoint);
}
VECCORE_ATT_HOST_DEVICE
virtual bool LevelLocate(LogicalVolume const *lvol, Vector3D<Precision> const &localpoint, NavigationState &state,
Vector3D<Precision> &daughterlocalpoint) const override
{
VPlacedVolume const *pvol = nullptr;
return LevelLocateKernel<false, true>(lvol, nullptr, localpoint, &state, pvol, daughterlocalpoint);
}
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
virtual bool LevelLocateExclVol(LogicalVolume const *lvol, VPlacedVolume const *exclvol,
Vector3D<Precision> const &localpoint, VPlacedVolume const *&pvol,
Vector3D<Precision> &daughterlocalpoint) const override
{
return LevelLocateKernel<true, false>(lvol, exclvol, localpoint, nullptr, pvol, daughterlocalpoint);
}
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
virtual bool LevelLocateExclVol(LogicalVolume const *lvol, VPlacedVolume const *exclvol,
Vector3D<Precision> const &localpoint, Vector3D<Precision> const &localdirection,
VPlacedVolume const *&pvol, Vector3D<Precision> &daughterlocalpoint) const override
{
return LevelLocateKernelWithDirection<true, false>(lvol, exclvol, localpoint, localdirection, nullptr, pvol,
daughterlocalpoint);
}
static std::string GetClassName() { return "SimpleLevelLocator"; }
virtual std::string GetName() const override { return GetClassName(); }
#ifndef VECCORE_CUDA
VECGEOM_FORCE_INLINE VECCORE_ATT_HOST_DEVICE
static VLevelLocator const *GetInstance()
{
static TSimpleLevelLocator instance;
return &instance;
}
#endif
}; // end class declaration
using SimpleLevelLocator = TSimpleLevelLocator<>;
template <>
inline std::string TSimpleLevelLocator<true>::GetClassName()
{
return "SimpleAssemblyLevelLocator";
}
using SimpleAssemblyLevelLocator = TSimpleLevelLocator<true>;
} // namespace VECGEOM_IMPL_NAMESPACE
} // namespace vecgeom
#endif /* NAVIGATION_SIMPLELEVELLOCATOR_H_ */
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