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// This file is part of VecGeom and is distributed under the
// conditions in the file LICENSE.txt in the top directory.
// For the full list of authors see CONTRIBUTORS.txt and `git log`.
/// This file implements the algorithms for Paralleliped
/// @file volumes/kernel/ParallelepipedImplementation.h
/// @author First version by Johannes de Fine Licht
/// @author Revised by Evgueni Tcherniaev
#ifndef VECGEOM_VOLUMES_KERNEL_PARALLELEPIPEDIMPLEMENTATION_H_
#define VECGEOM_VOLUMES_KERNEL_PARALLELEPIPEDIMPLEMENTATION_H_
#include "VecGeom/base/Vector3D.h"
#include "VecGeom/volumes/ParallelepipedStruct.h"
#include "VecGeom/volumes/kernel/GenericKernels.h"
#include <VecCore/VecCore>
#include <cstdio>
namespace vecgeom {
VECGEOM_DEVICE_FORWARD_DECLARE(struct ParallelepipedImplementation;);
VECGEOM_DEVICE_DECLARE_CONV(struct, ParallelepipedImplementation);
inline namespace VECGEOM_IMPL_NAMESPACE {
class PlacedParallelepiped;
template <typename T>
struct ParallelepipedStruct;
class UnplacedParallelepiped;
struct ParallelepipedImplementation {
using PlacedShape_t = PlacedParallelepiped;
using UnplacedStruct_t = ParallelepipedStruct<Precision>;
using UnplacedVolume_t = UnplacedParallelepiped;
VECCORE_ATT_HOST_DEVICE
static void PrintType()
{
// printf("SpecializedParallelepiped<%i, %i>", transCodeT, rotCodeT);
}
template <typename Stream>
static void PrintType(Stream &s, int transCodeT = translation::kGeneric, int rotCodeT = rotation::kGeneric)
{
s << "SpecializedParallelepiped<" << transCodeT << "," << rotCodeT << ">";
}
template <typename Stream>
static void PrintImplementationType(Stream & /*s*/)
{
// s << "ParallelepipedImplementation<" << transCodeT << "," << rotCodeT << ">";
}
template <typename Stream>
static void PrintUnplacedType(Stream & /*s*/)
{
// s << "UnplacedParallelepiped";
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void Transform(UnplacedStruct_t const &unplaced, Vector3D<Real_v> &point)
{
point.y() -= unplaced.fTanThetaSinPhi * point.z();
point.x() -= unplaced.fTanThetaCosPhi * point.z() + unplaced.fTanAlpha * point.y();
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void SafetyVector(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &localPoint,
Vector3D<Real_v> &safety)
{
safety = localPoint.Abs() - Vector3D<Real_v>(unplaced.fDimensions);
safety.x() *= unplaced.fCtx;
safety.y() *= unplaced.fCty;
}
template <typename Real_v, typename Bool_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void Contains(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point, Bool_v &inside)
{
Vector3D<Real_v> localPoint(point);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, localPoint);
SafetyVector<Real_v>(unplaced, localPoint, safetyVector);
inside = safetyVector.Max() < Real_v(0.0);
}
template <typename Real_v, typename Inside_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void Inside(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point, Inside_v &inside)
{
Vector3D<Real_v> localPoint(point);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, localPoint);
SafetyVector<Real_v>(unplaced, localPoint, safetyVector);
Real_v safety = safetyVector.Max();
inside = vecCore::Blend(safety < Real_v(0.0), Inside_v(kInside), Inside_v(kOutside));
vecCore__MaskedAssignFunc(inside, vecCore::math::Abs(safety) < Real_v(kHalfTolerance), Inside_v(kSurface));
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void SafetyToIn(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point, Real_v &safety)
{
Vector3D<Real_v> localPoint(point);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, localPoint);
SafetyVector<Real_v>(unplaced, localPoint, safetyVector);
safety = safetyVector.Max();
vecCore::MaskedAssign(safety, vecCore::math::Abs(safety) < Real_v(kHalfTolerance), Real_v(0.0));
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void SafetyToOut(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point, Real_v &safety)
{
Vector3D<Real_v> localPoint(point);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, localPoint);
SafetyVector<Real_v>(unplaced, localPoint, safetyVector);
safety = -safetyVector.Max();
vecCore::MaskedAssign(safety, vecCore::math::Abs(safety) < Real_v(kHalfTolerance), Real_v(0.0));
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void DistanceToIn(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point,
Vector3D<Real_v> const &direction, Real_v const & /* stepMax */, Real_v &distance)
{
using Bool_v = vecCore::Mask_v<Real_v>;
// Transform point and direction to local (oblique) system of coordinates,
// compute safety vector
Vector3D<Real_v> p(point);
Vector3D<Real_v> v(direction);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, p);
Transform<Real_v>(unplaced, v);
SafetyVector<Real_v>(unplaced, p, safetyVector);
// Check if point is leaving shape
Bool_v leaving(false);
leaving |= (safetyVector.x() >= -kHalfTolerance && p.x() * v.x() >= Real_v(0.));
leaving |= (safetyVector.y() >= -kHalfTolerance && p.y() * v.y() >= Real_v(0.));
leaving |= (safetyVector.z() >= -kHalfTolerance && p.z() * v.z() >= Real_v(0.));
// Compute distances
const Vector3D<Real_v> invDir(Real_v(1.) / NonZero(v.x()), Real_v(1.) / NonZero(v.y()),
Real_v(1.) / NonZero(v.z()));
const Vector3D<Real_v> signDir(Sign(invDir.x()), Sign(invDir.y()), Sign(invDir.z()));
const Vector3D<Real_v> temp = signDir * unplaced.fDimensions;
const Real_v distIn = ((-temp - p) * invDir).Max();
const Real_v distOut = ((temp - p) * invDir).Min();
// Set distance to in
distance = Real_v(kInfLength);
vecCore__MaskedAssignFunc(distance, !leaving && distOut > distIn + kHalfTolerance, distIn);
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static void DistanceToOut(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point,
Vector3D<Real_v> const &direction, Real_v const & /* stepMax */, Real_v &distance)
{
// Transform point and direction to local (oblique) system of coordinates,
// compute safety vector
Vector3D<Real_v> p(point);
Vector3D<Real_v> v(direction);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, p);
Transform<Real_v>(unplaced, v);
SafetyVector<Real_v>(unplaced, p, safetyVector);
// Compute distance to out
const Vector3D<Real_v> dir(NonZero(v.x()), NonZero(v.y()), NonZero(v.z()));
const Vector3D<Real_v> signDir(Sign(dir.x()), Sign(dir.y()), Sign(dir.z()));
distance = ((signDir * unplaced.fDimensions - p) / dir).Min();
// Set distance to out
vecCore__MaskedAssignFunc(distance, safetyVector.Max() > kHalfTolerance, Real_v(-1.0));
}
template <typename Real_v>
VECGEOM_FORCE_INLINE
VECCORE_ATT_HOST_DEVICE
static Vector3D<Real_v> NormalKernel(UnplacedStruct_t const &unplaced, Vector3D<Real_v> const &point,
typename vecCore::Mask_v<Real_v> &valid)
{
// Compute normal at the point on the surface.
// In case the point is not on the surface, set valid = false.
// Must return a valid vector (even if the point is not on the surface).
// On edge or corner, provide an average normal of all facets within the tolerance.
Vector3D<Real_v> normal(0.);
valid = true;
// Transform point to local (oblique) system of coordinates and compute safety vector
Vector3D<Real_v> p(point);
Vector3D<Real_v> safetyVector;
Transform<Real_v>(unplaced, p);
SafetyVector<Real_v>(unplaced, p, safetyVector);
// Set normal
const Vector3D<Real_v> signs(Sign(p.x()), Sign(p.y()), Sign(p.z()));
vecCore__MaskedAssignFunc(normal, Abs(safetyVector.z()) <= kHalfTolerance, Vector3D<Real_v>(0., 0., signs.z()));
vecCore__MaskedAssignFunc(normal, Abs(safetyVector.y()) <= kHalfTolerance,
normal + signs.y() * unplaced.fNormals[1]);
vecCore__MaskedAssignFunc(normal, Abs(safetyVector.x()) <= kHalfTolerance,
normal + signs.x() * unplaced.fNormals[0]);
Real_v mag2 = normal.Mag2();
vecCore__MaskedAssignFunc(normal, mag2 > 1., normal.Unit());
if (vecCore::MaskFull(mag2 > Real_v(0.))) return normal;
// Point is not on the surface - normally, this should never be.
// Return normal of the nearest face.
vecCore__MaskedAssignFunc(valid, mag2 == Real_v(0.), false);
Real_v safety = safetyVector.Max();
normal = signs.x() * unplaced.fNormals[0];
vecCore__MaskedAssignFunc(normal, safetyVector.y() == safety, signs.y() * unplaced.fNormals[1]);
vecCore__MaskedAssignFunc(normal, safetyVector.z() == safety, signs.z() * unplaced.fNormals[2]);
return normal;
}
};
} // namespace VECGEOM_IMPL_NAMESPACE
} // namespace vecgeom
#endif // VECGEOM_VOLUMES_KERNEL_PARALLELEPIPEDIMPLEMENTATION_H_
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