mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
88 lines
2.8 KiB
C++
88 lines
2.8 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_WarpScalar_h
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#define vtk_m_worklet_WarpScalar_h
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#include <vtkm/cont/ArrayHandle.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 point normals by the scalar
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// amount times the scalar factor. It's a VTK-m version of the vtkWarpScalar in VTK.
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// Useful for creating carpet or x-y-z plots.
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// It doesn't modify the point coordinates, but creates a new point coordinates
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// that have been warped.
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class WarpScalar
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{
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public:
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class WarpScalarImp : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn, FieldIn, FieldIn, FieldOut);
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using ExecutionSignature = void(_1, _2, _3, _4);
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VTKM_CONT
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WarpScalarImp(vtkm::FloatDefault scaleAmount)
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: ScaleAmount(scaleAmount)
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{
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}
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VTKM_EXEC
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void operator()(const vtkm::Vec3f& point,
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const vtkm::Vec3f& normal,
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const vtkm::FloatDefault& scaleFactor,
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vtkm::Vec3f& result) const
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{
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result = point + this->ScaleAmount * scaleFactor * normal;
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}
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template <typename T1, typename T2, typename T3>
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VTKM_EXEC void operator()(const vtkm::Vec<T1, 3>& point,
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const vtkm::Vec<T2, 3>& normal,
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const T3& scaleFactor,
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vtkm::Vec<T1, 3>& result) const
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{
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result = point + static_cast<T1>(this->ScaleAmount * scaleFactor) * normal;
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}
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private:
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vtkm::FloatDefault ScaleAmount;
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};
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// Execute the WarpScalar worklet given the points, vector and a scale factor.
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// Scale factor can differs per point.
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template <typename PointType,
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typename NormalType,
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typename ScaleFactorType,
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typename ResultType,
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typename ScaleAmountType>
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void Run(PointType point,
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NormalType normal,
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ScaleFactorType scaleFactor,
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ScaleAmountType scale,
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ResultType warpedPoint)
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{
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WarpScalarImp warpScalarImp(scale);
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vtkm::worklet::DispatcherMapField<WarpScalarImp> dispatcher(warpScalarImp);
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dispatcher.Invoke(point, normal, scaleFactor, 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_WarpScalar_h
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