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/// \file UnplacedTorus2.cpp
#include "VecGeom/volumes/UnplacedTorus2.h"
#include "VecGeom/volumes/SpecializedTorus2.h"
#include "VecGeom/volumes/utilities/VolumeUtilities.h"
#include "VecGeom/management/VolumeFactory.h"
namespace vecgeom {
inline namespace VECGEOM_IMPL_NAMESPACE {
VECCORE_ATT_HOST_DEVICE
void UnplacedTorus2::Print() const
{
printf("UnplacedTorus2 {%.2f, %.2f, %.2f, %.2f, %.2f}", rmin(), rmax(), rtor(), sphi(), dphi());
}
void UnplacedTorus2::Print(std::ostream &os) const
{
os << "UnplacedTorus2 {" << rmin() << ", " << rmax() << ", " << rtor() << ", " << sphi() << ", " << dphi();
}
#ifndef VECCORE_CUDA
SolidMesh *UnplacedTorus2::CreateMesh3D(Transformation3D const &trans, size_t nSegments) const
{
typedef Vector3D<Precision> Vec_t;
bool isFull = dphi() == 2 * kPi;
SolidMesh *sm = new SolidMesh();
sm->ResetMesh(2 * (nSegments + 1) * (nSegments + 1), (nSegments * nSegments) + 2);
Vec_t *vertices = new Vec_t[2 * (nSegments + 1) * (nSegments + 1)];
Precision phi_step = dphi() / nSegments;
Precision theta_step = 2 * M_PI / nSegments;
Precision phi = sphi();
Precision theta = 0.;
Precision intermediate1, intermediate2;
for (size_t p = 0, i = 0; i <= nSegments; ++i, theta += theta_step, phi = sphi()) {
intermediate1 = (rtor() + rmax() * std::cos(theta));
intermediate2 = (rtor() + rmin() * std::cos(theta));
for (size_t j = 0; j <= nSegments; ++j, p++, phi += phi_step) {
vertices[p] = Vec_t(intermediate1 * std::cos(phi), intermediate1 * std::sin(phi), rmax() * std::sin(theta));
vertices[p + (nSegments + 1) * (nSegments + 1)] =
Vec_t(intermediate2 * std::cos(phi), intermediate2 * std::sin(phi), rmin() * std::sin(theta));
}
}
sm->SetVertices(vertices, 2 * (nSegments + 1) * (nSegments + 1));
delete[] vertices;
sm->TransformVertices(trans);
// outer surface
for (size_t j = 0, k = 0; j < nSegments; j++, k++) {
for (size_t i = 0, l = k + nSegments + 1; i < nSegments; i++, k++, l++) {
sm->AddPolygon(4, {l + 1, l, k, k + 1}, true);
}
}
// inner surface
for (size_t j = 0, k = (nSegments + 1) * (nSegments + 1); j < nSegments; j++, k++) {
for (size_t i = 0, l = k + nSegments + 1; i < nSegments; i++, k++, l++) {
sm->AddPolygon(4, {k + 1, k, l, l + 1}, true);
}
}
// surfaces due to torus not being full
if (!isFull) {
for (size_t i = 0, j = 0; i < nSegments; i++, j += nSegments + 1) {
sm->AddPolygon(4,
{j, j + nSegments + 1, j + nSegments + 1 + (nSegments + 1) * (nSegments + 1),
j + (nSegments + 1) * (nSegments + 1)},
true);
}
for (size_t i = 0, j = nSegments; i < nSegments; i++, j += nSegments + 1) {
sm->AddPolygon(4,
{j + (nSegments + 1) * (nSegments + 1), j + (nSegments + 1) * (nSegments + 1) + nSegments + 1,
j + nSegments + 1, j},
true);
}
}
return sm;
}
#endif
#ifndef VECCORE_CUDA
VPlacedVolume *UnplacedTorus2::SpecializedVolume(LogicalVolume const *const volume,
Transformation3D const *const transformation,
const TranslationCode trans_code, const RotationCode rot_code,
VPlacedVolume *const placement) const
{
return VolumeFactory::CreateByTransformation<UnplacedTorus2>(volume, transformation, trans_code, rot_code, placement);
}
#else
__device__ VPlacedVolume *UnplacedTorus2::SpecializedVolume(LogicalVolume const *const volume,
Transformation3D const *const transformation,
const TranslationCode trans_code,
const RotationCode rot_code, const int id,
const int copy_no, const int child_id,
VPlacedVolume *const placement) const
{
return VolumeFactory::CreateByTransformation<UnplacedTorus2>(volume, transformation, trans_code, rot_code, id,
copy_no, child_id, placement);
}
#endif
Vector3D<Precision> UnplacedTorus2::SamplePointOnSurface() const
{
// taken from Geant4
Precision cosu, sinu, cosv, sinv, aOut, aIn, aSide, chose, phi, theta, rRand;
phi = RNG::Instance().uniform(fTorus.fSphi, fTorus.fSphi + fTorus.fDphi);
theta = RNG::Instance().uniform(0., vecgeom::kTwoPi);
cosu = std::cos(phi);
sinu = std::sin(phi);
cosv = std::cos(theta);
sinv = std::sin(theta);
// compute the areas
aOut = (fTorus.fDphi) * vecgeom::kTwoPi * fTorus.fRtor * fTorus.fRmax;
aIn = (fTorus.fDphi) * vecgeom::kTwoPi * fTorus.fRtor * fTorus.fRmin;
aSide = vecgeom::kPi * (fTorus.fRmax * fTorus.fRmax - fTorus.fRmin * fTorus.fRmin);
if ((fTorus.fSphi == 0.) && (fTorus.fDphi == vecgeom::kTwoPi)) {
aSide = 0;
}
chose = RNG::Instance().uniform(0., aOut + aIn + 2. * aSide);
if (chose < aOut) {
return Vector3D<Precision>((fTorus.fRtor + fTorus.fRmax * cosv) * cosu, (fTorus.fRtor + fTorus.fRmax * cosv) * sinu,
fTorus.fRmax * sinv);
} else if ((chose >= aOut) && (chose < aOut + aIn)) {
return Vector3D<Precision>((fTorus.fRtor + fTorus.fRmin * cosv) * cosu, (fTorus.fRtor + fTorus.fRmin * cosv) * sinu,
fTorus.fRmin * sinv);
} else if ((chose >= aOut + aIn) && (chose < aOut + aIn + aSide)) {
rRand = volumeUtilities::GetRadiusInRing(fTorus.fRmin, fTorus.fRmax);
return Vector3D<Precision>((fTorus.fRtor + rRand * cosv) * std::cos(fTorus.fSphi),
(fTorus.fRtor + rRand * cosv) * std::sin(fTorus.fSphi), rRand * sinv);
} else {
rRand = volumeUtilities::GetRadiusInRing(fTorus.fRmin, fTorus.fRmax);
return Vector3D<Precision>((fTorus.fRtor + rRand * cosv) * std::cos(fTorus.fSphi + fTorus.fDphi),
(fTorus.fRtor + rRand * cosv) * std::sin(fTorus.fSphi + fTorus.fDphi), rRand * sinv);
}
}
VECCORE_ATT_HOST_DEVICE
void UnplacedTorus2::DetectConvexity()
{
// Default safe convexity value
fGlobalConvexity = false;
// Logic to calculate the convexity
if (fTorus.fRtor == 0.) { // This will turn Torus2 to Spherical Shell
if (fTorus.fRmin == 0.) { // This will turn the Spherical shell to Orb
if (fTorus.fDphi <= kPi || fTorus.fDphi == kTwoPi) fGlobalConvexity = true;
}
}
}
template <TranslationCode transCodeT, RotationCode rotCodeT>
VECCORE_ATT_DEVICE
VPlacedVolume *UnplacedTorus2::Create(LogicalVolume const *const logical_volume,
Transformation3D const *const transformation,
#ifdef VECCORE_CUDA
const int id, const int copy_no, const int child_id,
#endif
VPlacedVolume *const placement)
{
(void)placement;
return new SimpleTorus2(logical_volume, transformation
#ifdef VECCORE_CUDA
,
id, copy_no, child_id
#endif
);
}
#ifdef VECGEOM_CUDA_INTERFACE
DevicePtr<cuda::VUnplacedVolume> UnplacedTorus2::CopyToGpu(DevicePtr<cuda::VUnplacedVolume> const in_gpu_ptr) const
{
return CopyToGpuImpl<UnplacedTorus2>(in_gpu_ptr, fTorus.fRmin, fTorus.fRmax, fTorus.fRtor, fTorus.fSphi,
fTorus.fDphi);
}
DevicePtr<cuda::VUnplacedVolume> UnplacedTorus2::CopyToGpu() const
{
return CopyToGpuImpl<UnplacedTorus2>();
}
#endif // VECGEOM_CUDA_INTERFACE
// Return unit normal of surface closest to p
// - note if point on z axis, ignore phi divided sides
// - unsafe if point close to z axis a rmin=0 - no explicit checks
VECCORE_ATT_HOST_DEVICE
bool UnplacedTorus2::Normal(Vector3D<Precision> const &point, Vector3D<Precision> &norm) const
{
int noSurfaces = 0;
bool valid = true;
Precision rho2, rho, pt2, pt, pPhi;
Precision distRMin = kInfLength;
Precision distSPhi = kInfLength, distEPhi = kInfLength;
// To cope with precision loss
//
const Precision delta = Max(10.0 * kTolerance, 1.0e-8 * (fTorus.fRtor + fTorus.fRmax));
const Precision dAngle = 10.0 * kTolerance;
Vector3D<Precision> nR, nPs, nPe;
Vector3D<Precision> sumnorm(0., 0., 0.);
rho2 = point.x() * point.x() + point.y() * point.y();
rho = Sqrt(rho2);
pt2 = rho2 + point.z() * point.z() + fTorus.fRtor * (fTorus.fRtor - 2 * rho);
pt2 = Max(pt2, Precision(0.)); // std::fabs(pt2);
pt = Sqrt(pt2);
Precision distRMax = Abs(pt - fTorus.fRmax);
if (fTorus.fRmin) distRMin = Abs(pt - fTorus.fRmin);
if (rho > delta && pt != Precision(0.)) {
Precision redFactor = (rho - fTorus.fRtor) / rho;
nR = Vector3D<Precision>(point.x() * redFactor, // p.x()*(1.-fRtor/rho),
point.y() * redFactor, // p.y()*(1.-fRtor/rho),
point.z());
nR *= Precision(1.) / pt;
}
if (fTorus.fDphi < kTwoPi) // && rho ) // old limitation against (0,0,z)
{
if (rho) {
pPhi = std::atan2(point.y(), point.x());
if (pPhi < fTorus.fSphi - delta) {
pPhi += kTwoPi;
} else if (pPhi > fTorus.fSphi + fTorus.fDphi + delta) {
pPhi -= kTwoPi;
}
distSPhi = Abs(pPhi - fTorus.fSphi);
distEPhi = Abs(pPhi - fTorus.fSphi - fTorus.fDphi);
}
nPs = Vector3D<Precision>(sin(fTorus.fSphi), -cos(fTorus.fSphi), 0);
nPe = Vector3D<Precision>(-sin(fTorus.fSphi + fTorus.fDphi), cos(fTorus.fSphi + fTorus.fDphi), 0);
}
if (distRMax <= delta) {
noSurfaces++;
sumnorm += nR;
} else if (fTorus.fRmin && (distRMin <= delta)) // Must not be on both Outer and Inner
{
noSurfaces++;
sumnorm -= nR;
}
// To be on one of the 'phi' surfaces,
// it must be within the 'tube' - with tolerance
if ((fTorus.fDphi < kTwoPi) && (fTorus.fRmin - delta <= pt) && (pt <= (fTorus.fRmax + delta))) {
if (distSPhi <= dAngle) {
noSurfaces++;
sumnorm += nPs;
}
if (distEPhi <= dAngle) {
noSurfaces++;
sumnorm += nPe;
}
}
if (noSurfaces == 0) {
valid = false;
} else if (noSurfaces == 1) {
norm = sumnorm;
} else {
norm = sumnorm.Unit();
}
return valid;
}
} // namespace VECGEOM_IMPL_NAMESPACE
#ifdef VECCORE_CUDA
namespace cxx {
template size_t DevicePtr<cuda::UnplacedTorus2>::SizeOf();
template void DevicePtr<cuda::UnplacedTorus2>::Construct(const Precision rmin, const Precision rmax,
const Precision rtor, const Precision sphi,
const Precision dphi) const;
} // namespace cxx
#endif
} // namespace vecgeom
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