mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//============================================================================
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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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//
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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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#ifndef vtk_m_worklet_WarpVector_h
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#define vtk_m_worklet_WarpVector_h
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/DeviceAdapter.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/VecTraits.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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// A functor that modify points by moving points along a vector
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// then timing a scale factor. It's a VTK-m version of the vtkWarpVector in VTK.
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// Useful for showing flow profiles or mechanical deformation.
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// This worklet does not modify the input points but generate new point coordinate
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// instance that has been warped.
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class WarpVector
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{
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public:
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class WarpVectorImp : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn, FieldIn, FieldOut);
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using ExecutionSignature = _3(_1, _2);
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VTKM_CONT
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WarpVectorImp(vtkm::FloatDefault scale)
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: Scale(scale)
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{
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}
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VTKM_EXEC
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vtkm::Vec3f operator()(const vtkm::Vec3f& point, const vtkm::Vec3f& vector) const
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{
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return point + this->Scale * vector;
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}
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template <typename T>
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VTKM_EXEC vtkm::Vec<T, 3> operator()(const vtkm::Vec<T, 3>& point,
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const vtkm::Vec<T, 3>& vector) const
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{
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return point + static_cast<T>(this->Scale) * vector;
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}
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private:
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vtkm::FloatDefault Scale;
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};
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// Execute the WarpVector worklet given the points, vector and a scale factor.
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// Returns:
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// warped points
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template <typename PointType, typename VectorType, typename ResultType>
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void Run(PointType point, VectorType vector, vtkm::FloatDefault scale, ResultType warpedPoint)
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{
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WarpVectorImp warpVectorImp(scale);
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vtkm::worklet::DispatcherMapField<WarpVectorImp> dispatcher(warpVectorImp);
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dispatcher.Invoke(point, vector, warpedPoint);
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}
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};
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}
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} // namespace vtkm::worklet
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#endif // vtk_m_worklet_WarpVector_h
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