Add coordinate system transformation.
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@ -25,6 +25,7 @@ set(headers
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CellMeasure.h
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Clip.h
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ContourTreeUniform.h
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CoordinateSystemTransform.h
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CosmoTools.h
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CrossProduct.h
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DispatcherMapField.h
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224
vtkm/worklet/CoordinateSystemTransform.h
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224
vtkm/worklet/CoordinateSystemTransform.h
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@ -0,0 +1,224 @@
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//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_worklet_CoordinateSystemTransform_h
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#define vtk_m_worklet_CoordinateSystemTransform_h
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#include <vtkm/Math.h>
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#include <vtkm/Matrix.h>
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#include <vtkm/Transform3D.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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namespace vtkm
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{
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namespace worklet
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{
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template <typename T>
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class CylindricalCoordinateTransform
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{
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public:
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struct CylToCar : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn<Vec3>, FieldOut<Vec3>);
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using ExecutionSignature = _2(_1);
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//Functor
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VTKM_EXEC vtkm::Vec<T, 3> operator()(const vtkm::Vec<T, 3>& vec) const
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{
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vtkm::Vec<T, 3> res(vec[0] * static_cast<T>(vtkm::Cos(vec[1])),
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vec[0] * static_cast<T>(vtkm::Sin(vec[1])),
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vec[2]);
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return res;
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}
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};
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struct CarToCyl : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn<Vec3>, FieldOut<Vec3>);
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using ExecutionSignature = _2(_1);
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//Functor
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VTKM_EXEC vtkm::Vec<T, 3> operator()(const vtkm::Vec<T, 3>& vec) const
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{
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T R = vtkm::Sqrt(vec[0] * vec[0] + vec[1] * vec[1]);
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T Theta = 0;
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if (vec[0] == 0 && vec[1] == 0)
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Theta = 0;
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else if (vec[0] < 0)
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Theta = -vtkm::ASin(vec[1] / R) + static_cast<T>(vtkm::Pi());
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else
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Theta = vtkm::ASin(vec[1] / R);
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vtkm::Vec<T, 3> res(R, Theta, vec[2]);
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return res;
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}
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};
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VTKM_CONT
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CylindricalCoordinateTransform()
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: cartesianToCylindrical(true)
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{
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}
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VTKM_CONT void SetCartesianToCylindrical() { cartesianToCylindrical = true; }
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VTKM_CONT void SetCylindricalToCartesian() { cartesianToCylindrical = false; }
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template <typename CoordsStorageType>
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void Run(const vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& inPoints,
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& outPoints)
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{
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if (cartesianToCylindrical)
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{
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vtkm::worklet::DispatcherMapField<CarToCyl> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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else
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{
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vtkm::worklet::DispatcherMapField<CylToCar> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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}
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template <typename CoordsStorageType>
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void Run(const vtkm::cont::CoordinateSystem& inPoints,
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& outPoints)
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{
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if (cartesianToCylindrical)
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{
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vtkm::worklet::DispatcherMapField<CarToCyl> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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else
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{
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vtkm::worklet::DispatcherMapField<CylToCar> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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}
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private:
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bool cartesianToCylindrical;
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};
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template <typename T>
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class SphericalCoordinateTransform
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{
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public:
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struct SphereToCar : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn<Vec3>, FieldOut<Vec3>);
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using ExecutionSignature = _2(_1);
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//Functor
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VTKM_EXEC vtkm::Vec<T, 3> operator()(const vtkm::Vec<T, 3>& vec) const
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{
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T R = vec[0];
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T Theta = vec[1];
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T Phi = vec[2];
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T sinTheta = static_cast<T>(vtkm::Sin(Theta));
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T cosTheta = static_cast<T>(vtkm::Cos(Theta));
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T sinPhi = static_cast<T>(vtkm::Sin(Phi));
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T cosPhi = static_cast<T>(vtkm::Cos(Phi));
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T x = R * sinTheta * cosPhi;
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T y = R * sinTheta * sinPhi;
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T z = R * cosTheta;
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vtkm::Vec<T, 3> r(x, y, z);
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return r;
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}
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};
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struct CarToSphere : public vtkm::worklet::WorkletMapField
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{
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using ControlSignature = void(FieldIn<Vec3>, FieldOut<Vec3>);
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using ExecutionSignature = _2(_1);
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//Functor
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VTKM_EXEC vtkm::Vec<T, 3> operator()(const vtkm::Vec<T, 3>& vec) const
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{
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T x = vec[0];
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T y = vec[1];
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T z = vec[2];
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T R = vtkm::Sqrt(x * x + y * y + z * z);
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T Theta = 0;
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if (R > 0)
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Theta = vtkm::ACos(z / R);
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T Phi = vtkm::ATan2(y, x);
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if (Phi < 0)
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Phi += static_cast<T>(vtkm::TwoPi());
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return vtkm::Vec<T, 3>(R, Theta, Phi);
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}
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};
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VTKM_CONT
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SphericalCoordinateTransform()
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: CartesianToSpherical(true)
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{
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}
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VTKM_CONT void SetCartesianToSpherical() { CartesianToSpherical = true; }
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VTKM_CONT void SetSphericalToCartesian() { CartesianToSpherical = false; }
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template <typename CoordsStorageType>
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void Run(const vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& inPoints,
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& outPoints)
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{
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if (CartesianToSpherical)
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{
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vtkm::worklet::DispatcherMapField<CarToSphere> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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else
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{
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vtkm::worklet::DispatcherMapField<SphereToCar> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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}
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template <typename CoordsStorageType>
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void Run(const vtkm::cont::CoordinateSystem& inPoints,
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vtkm::cont::ArrayHandle<vtkm::Vec<T, 3>, CoordsStorageType>& outPoints)
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{
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if (CartesianToSpherical)
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{
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vtkm::worklet::DispatcherMapField<CarToSphere> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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else
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{
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vtkm::worklet::DispatcherMapField<SphereToCar> dispatcher;
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dispatcher.Invoke(inPoints, outPoints);
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}
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}
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private:
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bool CartesianToSpherical;
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};
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}
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} // namespace vtkm::worklet
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#endif // vtk_m_worklet_CoordinateSystemTransform_h
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@ -28,6 +28,7 @@ set(unit_tests
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UnitTestCellMeasure.cxx
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UnitTestClipping.cxx
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UnitTestContourTreeUniform.cxx
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UnitTestCoordinateSystemTransform.cxx
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UnitTestCosmoTools.cxx
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UnitTestCrossProduct.cxx
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UnitTestDotProduct.cxx
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vtkm/worklet/testing/UnitTestCoordinateSystemTransform.cxx
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214
vtkm/worklet/testing/UnitTestCoordinateSystemTransform.cxx
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@ -0,0 +1,214 @@
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//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/cont/CellSetExplicit.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <vtkm/worklet/CoordinateSystemTransform.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <random>
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#include <vector>
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namespace
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{
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std::mt19937 randGenerator;
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enum CoordinateType
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{
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CART = 0,
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CYL,
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SPH
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};
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vtkm::cont::DataSet MakeTestDataSet(const CoordinateType& cType)
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{
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vtkm::cont::DataSet dataSet;
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std::vector<vtkm::Vec<vtkm::FloatDefault, 3>> coordinates;
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const vtkm::Id dim = 5;
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if (cType == CART)
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{
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for (vtkm::Id j = 0; j < dim; ++j)
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{
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vtkm::FloatDefault z =
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static_cast<vtkm::FloatDefault>(j) / static_cast<vtkm::FloatDefault>(dim - 1);
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for (vtkm::Id i = 0; i < dim; ++i)
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{
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vtkm::FloatDefault x =
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static_cast<vtkm::FloatDefault>(i) / static_cast<vtkm::FloatDefault>(dim - 1);
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vtkm::FloatDefault y = (x * x + z * z) / 2.0f;
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coordinates.push_back(vtkm::make_Vec(x + 0, y + 0, z + 0));
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}
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}
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}
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else if (cType == CYL)
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{
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vtkm::FloatDefault R = 1.0f;
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for (vtkm::Id j = 0; j < dim; j++)
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{
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vtkm::FloatDefault Z =
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static_cast<vtkm::FloatDefault>(j) / static_cast<vtkm::FloatDefault>(dim - 1);
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for (vtkm::Id i = 0; i < dim; i++)
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{
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vtkm::FloatDefault Theta = vtkm::TwoPif() *
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(static_cast<vtkm::FloatDefault>(i) / static_cast<vtkm::FloatDefault>(dim - 1));
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coordinates.push_back(vtkm::make_Vec(R, Theta, Z));
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}
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}
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}
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else if (cType == SPH)
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{
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//Spherical coordinates have some degenerate cases, so provide some good cases.
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vtkm::FloatDefault R = 1.0f;
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vtkm::FloatDefault eps = vtkm::Epsilon<float>();
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std::vector<vtkm::FloatDefault> Thetas = {
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eps, vtkm::Pif() / 4, vtkm::Pif() / 3, vtkm::Pif() / 2, vtkm::Pif() - eps
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};
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std::vector<vtkm::FloatDefault> Phis = {
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eps, vtkm::TwoPif() / 4, vtkm::TwoPif() / 3, vtkm::TwoPif() / 2, vtkm::TwoPif() - eps
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};
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for (std::size_t i = 0; i < Thetas.size(); i++)
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for (std::size_t j = 0; j < Phis.size(); j++)
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coordinates.push_back(vtkm::make_Vec(R, Thetas[i], Phis[j]));
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}
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vtkm::Id numCells = (dim - 1) * (dim - 1);
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dataSet.AddCoordinateSystem(
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vtkm::cont::make_CoordinateSystem("coordinates", coordinates, vtkm::CopyFlag::On));
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vtkm::cont::CellSetExplicit<> cellSet("cells");
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cellSet.PrepareToAddCells(numCells, numCells * 4);
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for (vtkm::Id j = 0; j < dim - 1; ++j)
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{
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for (vtkm::Id i = 0; i < dim - 1; ++i)
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{
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cellSet.AddCell(vtkm::CELL_SHAPE_QUAD,
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4,
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vtkm::make_Vec<vtkm::Id>(
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j * dim + i, j * dim + i + 1, (j + 1) * dim + i + 1, (j + 1) * dim + i));
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}
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}
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cellSet.CompleteAddingCells(vtkm::Id(coordinates.size()));
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dataSet.AddCellSet(cellSet);
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return dataSet;
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}
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void ValidateCoordTransform(
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const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>>& transform,
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const vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>>& doubleTransform,
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const std::vector<bool>& isAngle)
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{
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auto points = coords.GetData();
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VTKM_TEST_ASSERT(points.GetNumberOfValues() == transform.GetNumberOfValues() &&
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points.GetNumberOfValues() == doubleTransform.GetNumberOfValues(),
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"Incorrect number of points in point transform");
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//The double transform should produce the same result.
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auto pointsPortal = points.GetPortalConstControl();
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auto resultsPortal = doubleTransform.GetPortalConstControl();
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for (vtkm::Id i = 0; i < points.GetNumberOfValues(); i++)
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{
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vtkm::Vec<vtkm::FloatDefault, 3> p = pointsPortal.Get(i);
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vtkm::Vec<vtkm::FloatDefault, 3> r = resultsPortal.Get(i);
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bool isEqual = true;
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for (vtkm::IdComponent j = 0; j < 3; j++)
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{
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if (isAngle[static_cast<std::size_t>(j)])
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isEqual &= (test_equal(p[j], r[j]) || test_equal(p[j] + vtkm::TwoPif(), r[j]) ||
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test_equal(p[j], r[j] + vtkm::TwoPif()));
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else
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isEqual &= test_equal(p[j], r[j]);
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}
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VTKM_TEST_ASSERT(isEqual, "Wrong result for PointTransform worklet");
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}
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}
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}
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void TestCoordinateSystemTransform()
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{
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std::cout << "Testing CylindricalCoordinateTransform Worklet" << std::endl;
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//Test cartesian to cyl
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vtkm::cont::DataSet dsCart = MakeTestDataSet(CART);
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vtkm::worklet::CylindricalCoordinateTransform<vtkm::FloatDefault> cylTrn;
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> carToCylPts;
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> revResult;
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cylTrn.SetCartesianToCylindrical();
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cylTrn.Run(dsCart.GetCoordinateSystem(), carToCylPts);
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cylTrn.SetCylindricalToCartesian();
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cylTrn.Run(carToCylPts, revResult);
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ValidateCoordTransform(
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dsCart.GetCoordinateSystem(), carToCylPts, revResult, { false, false, false });
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//Test cylindrical to cartesian
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vtkm::cont::DataSet dsCyl = MakeTestDataSet(CYL);
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> cylToCarPts;
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cylTrn.SetCylindricalToCartesian();
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cylTrn.Run(dsCyl.GetCoordinateSystem(), cylToCarPts);
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cylTrn.SetCartesianToCylindrical();
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cylTrn.Run(cylToCarPts, revResult);
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ValidateCoordTransform(
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dsCyl.GetCoordinateSystem(), cylToCarPts, revResult, { false, true, false });
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//Spherical transform
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//Test cartesian to sph
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vtkm::worklet::SphericalCoordinateTransform<vtkm::FloatDefault> sphTrn;
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> carToSphPts;
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sphTrn.SetCartesianToSpherical();
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sphTrn.Run(dsCart.GetCoordinateSystem(), carToSphPts);
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sphTrn.SetSphericalToCartesian();
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sphTrn.Run(carToSphPts, revResult);
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ValidateCoordTransform(
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dsCart.GetCoordinateSystem(), carToSphPts, revResult, { false, true, true });
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//Test spherical to cartesian
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> sphToCarPts;
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vtkm::cont::DataSet dsSph = MakeTestDataSet(SPH);
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sphTrn.SetSphericalToCartesian();
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sphTrn.Run(dsSph.GetCoordinateSystem(), sphToCarPts);
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sphTrn.SetCartesianToSpherical();
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sphTrn.Run(sphToCarPts, revResult);
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ValidateCoordTransform(
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dsSph.GetCoordinateSystem(), sphToCarPts, revResult, { false, true, true });
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sphTrn.SetSphericalToCartesian();
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sphTrn.Run(dsSph.GetCoordinateSystem(), sphToCarPts);
|
||||
sphTrn.SetCartesianToSpherical();
|
||||
sphTrn.Run(sphToCarPts, revResult);
|
||||
ValidateCoordTransform(
|
||||
dsSph.GetCoordinateSystem(), sphToCarPts, revResult, { false, true, true });
|
||||
}
|
||||
|
||||
int UnitTestCoordinateSystemTransform(int, char* [])
|
||||
{
|
||||
return vtkm::cont::testing::Testing::Run(TestCoordinateSystemTransform);
|
||||
}
|
Loading…
Reference in New Issue
Block a user