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#include "VecGeom/volumes/UnplacedVolume.h"
#include "VecGeom/volumes/PlacedVolume.h"
#include "VecGeom/base/SOA3D.h"
#include "VecGeom/volumes/utilities/VolumeUtilities.h"
#ifdef VECGEOM_ENABLE_CUDA
#include "VecGeom/backend/cuda/Interface.h"
#endif
namespace vecgeom {
inline namespace VECGEOM_IMPL_NAMESPACE {
using Vec3D = Vector3D<Precision>;
using Real_v = vecgeom::VectorBackend::Real_v;
// generic implementation for SamplePointOnSurface
Vector3D<Precision> VUnplacedVolume::SamplePointOnSurface() const
{
Vector3D<Precision> surfacepoint;
SOA3D<Precision> points(1);
volumeUtilities::FillRandomPoints(*this, points);
Vector3D<Precision> dir = volumeUtilities::SampleDirection();
surfacepoint = points[0] + DistanceToOut(points[0], dir) * dir;
// assert( Inside(surfacepoint) == vecgeom::kSurface );
return surfacepoint;
}
// trivial implementations for the interface functions
// (since we are moving to these interfaces only gradually)
// ---------------- DistanceToOut functions -----------------------------------------------------
// the USolid/GEANT4-like interface for DistanceToOut (returning also exiting normal)
VECCORE_ATT_HOST_DEVICE
Precision VUnplacedVolume::DistanceToOut(Vector3D<Precision> const &p, Vector3D<Precision> const &d,
Vector3D<Precision> &normal, bool &convex, Precision step_max) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return -1.;
}
// an explicit SIMD interface
VECCORE_ATT_HOST_DEVICE
Real_v VUnplacedVolume::DistanceToOutVec(Vector3D<Real_v> const &p, Vector3D<Real_v> const &d,
Real_v const &step_max) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return Real_v(-1.);
}
// the container/basket interface (possibly to be deprecated)
void VUnplacedVolume::DistanceToOut(SOA3D<Precision> const &points, SOA3D<Precision> const &directions,
Precision const *const step_max, Precision *const output) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
}
// ---------------- SafetyToOut functions -----------------------------------------------------
// an explicit SIMD interface
VECCORE_ATT_HOST_DEVICE
Real_v VUnplacedVolume::SafetyToOutVec(Vector3D<Real_v> const &p) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return Real_v(-1.);
}
// the container/basket interface (possibly to be deprecated)
void VUnplacedVolume::SafetyToOut(SOA3D<Precision> const &points, Precision *const output) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
}
// ---------------- DistanceToIn functions -----------------------------------------------------
VECCORE_ATT_HOST_DEVICE
Real_v VUnplacedVolume::DistanceToInVec(Vector3D<Real_v> const &position, Vector3D<Real_v> const &direction,
const Real_v &step_max) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return Real_v(-1.);
}
// ---------------- SafetyToIn functions -------------------------------------------------------
// explicit SIMD interface
VECCORE_ATT_HOST_DEVICE
Real_v VUnplacedVolume::SafetyToInVec(Vector3D<Real_v> const &p) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return Real_v(-1.);
}
// ---------------- Normal ---------------------------------------------------------------------
VECCORE_ATT_HOST_DEVICE
bool VUnplacedVolume::Normal(Vector3D<Precision> const &p, Vector3D<Precision> &normal) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
return false;
}
// ----------------- Extent --------------------------------------------------------------------
VECCORE_ATT_HOST_DEVICE
void VUnplacedVolume::Extent(Vector3D<Precision> &aMin, Vector3D<Precision> &aMax) const
{
#ifndef VECCORE_CUDA
throw std::runtime_error("unimplemented function called");
#endif
}
// estimating the surface area by sampling
// based on the six-point method of G4
Precision VUnplacedVolume::EstimateSurfaceArea(int nStat) const
{
static const Precision s2 = 1. / Sqrt(2.);
static const Precision s3 = 1. / Sqrt(3.);
// Predefined directions
//
static const Vec3D directions[64] = {
Vec3D(0, 0, 0), Vec3D(-1, 0, 0), // ( , , ) ( -, , )
Vec3D(1, 0, 0), Vec3D(-1, 0, 0), // ( +, , ) (-+, , )
Vec3D(0, -1, 0), Vec3D(-s2, -s2, 0), // ( , -, ) ( -, -, )
Vec3D(s2, -s2, 0), Vec3D(0, -1, 0), // ( +, -, ) (-+, -, )
Vec3D(0, 1, 0), Vec3D(-s2, s2, 0), // ( , +, ) ( -, +, )
Vec3D(s2, s2, 0), Vec3D(0, 1, 0), // ( +, +, ) (-+, +, )
Vec3D(0, -1, 0), Vec3D(-1, 0, 0), // ( ,-+, ) ( -,-+, )
Vec3D(1, 0, 0), Vec3D(-1, 0, 0), // ( +,-+, ) (-+,-+, )
Vec3D(0, 0, -1), Vec3D(-s2, 0, -s2), // ( , , -) ( -, , -)
Vec3D(s2, 0, -s2), Vec3D(0, 0, -1), // ( +, , -) (-+, , -)
Vec3D(0, -s2, -s2), Vec3D(-s3, -s3, -s3), // ( , -, -) ( -, -, -)
Vec3D(s3, -s3, -s3), Vec3D(0, -s2, -s2), // ( +, -, -) (-+, -, -)
Vec3D(0, s2, -s2), Vec3D(-s3, s3, -s3), // ( , +, -) ( -, +, -)
Vec3D(s3, s3, -s3), Vec3D(0, s2, -s2), // ( +, +, -) (-+, +, -)
Vec3D(0, 0, -1), Vec3D(-s2, 0, -s2), // ( ,-+, -) ( -,-+, -)
Vec3D(s2, 0, -s2), Vec3D(0, 0, -1), // ( +,-+, -) (-+,-+, -)
Vec3D(0, 0, 1), Vec3D(-s2, 0, s2), // ( , , +) ( -, , +)
Vec3D(s2, 0, s2), Vec3D(0, 0, 1), // ( +, , +) (-+, , +)
Vec3D(0, -s2, s2), Vec3D(-s3, -s3, s3), // ( , -, +) ( -, -, +)
Vec3D(s3, -s3, s3), Vec3D(0, -s2, s2), // ( +, -, +) (-+, -, +)
Vec3D(0, s2, s2), Vec3D(-s3, s3, s3), // ( , +, +) ( -, +, +)
Vec3D(s3, s3, s3), Vec3D(0, s2, s2), // ( +, +, +) (-+, +, +)
Vec3D(0, 0, 1), Vec3D(-s2, 0, s2), // ( ,-+, +) ( -,-+, +)
Vec3D(s2, 0, s2), Vec3D(0, 0, 1), // ( +,-+, +) (-+,-+, +)
Vec3D(0, 0, -1), Vec3D(-1, 0, 0), // ( , ,-+) ( -, ,-+)
Vec3D(1, 0, 0), Vec3D(-1, 0, 0), // ( +, ,-+) (-+, ,-+)
Vec3D(0, -1, 0), Vec3D(-s2, -s2, 0), // ( , -,-+) ( -, -,-+)
Vec3D(s2, -s2, 0), Vec3D(0, -1, 0), // ( +, -,-+) (-+, -,-+)
Vec3D(0, 1, 0), Vec3D(-s2, s2, 0), // ( , +,-+) ( -, +,-+)
Vec3D(s2, s2, 0), Vec3D(0, 1, 0), // ( +, +,-+) (-+, +,-+)
Vec3D(0, -1, 0), Vec3D(-1, 0, 0), // ( ,-+,-+) ( -,-+,-+)
Vec3D(1, 0, 0), Vec3D(-1, 0, 0), // ( +,-+,-+) (-+,-+,-+)
};
// Get bounding box
//
Vec3D bmin, bmax;
this->Extent(bmin, bmax);
Vec3D bdim = bmax - bmin;
// Define statistics and shell thickness
//
int npoints = (nStat < 1000) ? 1000 : nStat;
Precision coeff = 0.5 / Cbrt(Precision(npoints));
Precision eps = coeff * bdim.Min(); // half thickness
Precision twoeps = 2. * eps;
Precision del = 1.8 * eps; // six-point offset - should be more than sqrt(3.)
// Enlarge bounding box by eps
//
bmin -= Vec3D(eps);
bdim += Vec3D(twoeps);
// Calculate surface area
//
int icount = 0;
for (int i = 0; i < npoints; ++i) {
Precision px = bmin.x() + bdim.x() * RNG::Instance().uniform();
Precision py = bmin.y() + bdim.y() * RNG::Instance().uniform();
Precision pz = bmin.z() + bdim.z() * RNG::Instance().uniform();
Vec3D p(px, py, pz);
EnumInside in = this->Inside(p);
Precision dist = 0;
if (in == EInside::kInside) {
if (this->SafetyToOut(p) >= eps) continue;
int icase = 0;
if (this->Inside(Vec3D(px - del, py, pz)) != EInside::kInside) icase += 1;
if (this->Inside(Vec3D(px + del, py, pz)) != EInside::kInside) icase += 2;
if (this->Inside(Vec3D(px, py - del, pz)) != EInside::kInside) icase += 4;
if (this->Inside(Vec3D(px, py + del, pz)) != EInside::kInside) icase += 8;
if (this->Inside(Vec3D(px, py, pz - del)) != EInside::kInside) icase += 16;
if (this->Inside(Vec3D(px, py, pz + del)) != EInside::kInside) icase += 32;
if (icase == 0) continue;
Vec3D v = directions[icase];
dist = this->DistanceToOut(p, v);
Vec3D n;
this->Normal(p + v * dist, n);
dist *= v.Dot(n);
} else if (in == EInside::kOutside) {
if (this->SafetyToIn(p) >= eps) continue;
int icase = 0;
if (this->Inside(Vec3D(px - del, py, pz)) != EInside::kOutside) icase += 1;
if (this->Inside(Vec3D(px + del, py, pz)) != EInside::kOutside) icase += 2;
if (this->Inside(Vec3D(px, py - del, pz)) != EInside::kOutside) icase += 4;
if (this->Inside(Vec3D(px, py + del, pz)) != EInside::kOutside) icase += 8;
if (this->Inside(Vec3D(px, py, pz - del)) != EInside::kOutside) icase += 16;
if (this->Inside(Vec3D(px, py, pz + del)) != EInside::kOutside) icase += 32;
if (icase == 0) continue;
Vec3D v = directions[icase];
dist = this->DistanceToIn(p, v);
if (dist == kInfLength) continue;
Vec3D n;
this->Normal(p + v * dist, n);
dist *= -(v.Dot(n));
}
if (dist < eps) icount++;
}
return bdim.x() * bdim.y() * bdim.z() * icount / npoints / twoeps;
}
// estimating the cubic volume by sampling
// based on the method of G4
Precision VUnplacedVolume::EstimateCapacity(int nStat) const
{
Precision epsilon = 1E-4;
// limits
if (nStat < 100) nStat = 100;
Vector3D<Precision> lower, upper, offset;
this->Extent(lower, upper);
offset = 0.5 * (upper + lower);
const Vector3D<Precision> dim = 0.5 * (upper - lower);
int insidecounter = 0;
for (int i = 0; i < nStat; i++) {
auto p = offset + volumeUtilities::SamplePoint(dim);
if (this->Contains(p)) insidecounter++;
}
return 8. * (dim[0] + epsilon) * (dim[1] + epsilon) * (dim[2] + epsilon) * insidecounter / nStat;
}
std::ostream &operator<<(std::ostream &os, VUnplacedVolume const &vol)
{
vol.Print(os);
return os;
}
#ifndef VECCORE_CUDA
VPlacedVolume *VUnplacedVolume::PlaceVolume(LogicalVolume const *const volume,
Transformation3D const *const transformation,
VPlacedVolume *const placement) const
{
const TranslationCode trans_code = transformation->GenerateTranslationCode();
const RotationCode rot_code = transformation->GenerateRotationCode();
return SpecializedVolume(volume, transformation, trans_code, rot_code, placement);
}
VPlacedVolume *VUnplacedVolume::PlaceVolume(char const *const label, LogicalVolume const *const volume,
Transformation3D const *const transformation,
VPlacedVolume *const placement) const
{
VPlacedVolume *const placed = PlaceVolume(volume, transformation, placement);
placed->set_label(label);
return placed;
}
#endif
#ifdef VECGEOM_CUDA_INTERFACE
void VUnplacedVolume::CopyBBoxesToGpu(const std::vector<VUnplacedVolume const *> &volumes,
const std::vector<DevicePtr<cuda::VUnplacedVolume>> &gpu_ptrs)
{
assert(volumes.size() == gpu_ptrs.size() && "Unequal CPU/GPU vectors for copying bounding boxes.");
// Copy boxes data in a contiguous array, box icrt starting at index 6*icrt
std::vector<Precision> boxesData(6 * gpu_ptrs.size());
int icrt = 0;
for (auto vol : volumes) {
Vector3D<Precision> amin, amax;
vol->GetBBox(amin, amax);
assert((amax - amin).Mag() > 0);
for (unsigned int i = 0; i < 3; ++i) {
boxesData[6 * icrt + i] = amin[i];
boxesData[6 * icrt + i + 3] = amax[i];
}
icrt++;
}
// Dispatch to the GPU interface helper
CopyBBoxesToGpuImpl<cuda::VUnplacedVolume, DevicePtr<cuda::VUnplacedVolume>>(gpu_ptrs.size(), gpu_ptrs.data(),
boxesData.data());
}
#endif
} // namespace VECGEOM_IMPL_NAMESPACE
#ifdef VECCORE_CUDA
namespace cxx {
template void CopyBBoxesToGpuImpl<cuda::VUnplacedVolume, DevicePtr<cuda::VUnplacedVolume>>(
std::size_t, DevicePtr<cuda::VUnplacedVolume> const *, cuda::Precision *);
} // namespace cxx
#endif // VECCORE_CUDA
} // namespace vecgeom
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