mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 09:59:12 +00:00
225 lines
6.8 KiB
C++
225 lines
6.8 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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#include <vtkm/rendering/MapperCylinder.h>
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#include <vtkm/cont/Timer.h>
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#include <vtkm/cont/TryExecute.h>
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#include <vtkm/rendering/CanvasRayTracer.h>
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#include <vtkm/rendering/Cylinderizer.h>
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#include <vtkm/rendering/raytracing/Camera.h>
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#include <vtkm/rendering/raytracing/CylinderExtractor.h>
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#include <vtkm/rendering/raytracing/CylinderIntersector.h>
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#include <vtkm/rendering/raytracing/Logger.h>
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#include <vtkm/rendering/raytracing/RayOperations.h>
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#include <vtkm/rendering/raytracing/RayTracer.h>
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#include <vtkm/rendering/raytracing/Worklets.h>
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namespace vtkm
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{
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namespace rendering
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{
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class CalcDistance : public vtkm::worklet::WorkletMapField
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{
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public:
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VTKM_CONT
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CalcDistance(const vtkm::Vec3f_32& _eye_pos)
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: eye_pos(_eye_pos)
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{
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}
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typedef void ControlSignature(FieldIn, FieldOut);
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typedef void ExecutionSignature(_1, _2);
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template <typename VecType, typename OutType>
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VTKM_EXEC inline void operator()(const VecType& pos, OutType& out) const
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{
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VecType tmp = eye_pos - pos;
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out = static_cast<OutType>(vtkm::Sqrt(vtkm::dot(tmp, tmp)));
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}
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const vtkm::Vec3f_32 eye_pos;
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}; //class CalcDistance
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struct MapperCylinder::InternalsType
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{
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vtkm::rendering::CanvasRayTracer* Canvas;
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vtkm::rendering::raytracing::RayTracer Tracer;
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vtkm::rendering::raytracing::Camera RayCamera;
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vtkm::rendering::raytracing::Ray<vtkm::Float32> Rays;
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bool CompositeBackground;
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vtkm::Float32 Radius;
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vtkm::Float32 Delta;
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bool UseVariableRadius;
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VTKM_CONT
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InternalsType()
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: Canvas(nullptr)
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, CompositeBackground(true)
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, Radius(-1.0f)
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, Delta(0.5)
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, UseVariableRadius(false)
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{
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}
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};
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MapperCylinder::MapperCylinder()
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: Internals(new InternalsType)
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{
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}
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MapperCylinder::~MapperCylinder() {}
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void MapperCylinder::SetCanvas(vtkm::rendering::Canvas* canvas)
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{
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if (canvas != nullptr)
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{
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this->Internals->Canvas = dynamic_cast<CanvasRayTracer*>(canvas);
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if (this->Internals->Canvas == nullptr)
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{
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throw vtkm::cont::ErrorBadValue("Ray Tracer: bad canvas type. Must be CanvasRayTracer");
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}
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}
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else
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{
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this->Internals->Canvas = nullptr;
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}
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}
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vtkm::rendering::Canvas* MapperCylinder::GetCanvas() const
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{
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return this->Internals->Canvas;
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}
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void MapperCylinder::UseVariableRadius(bool useVariableRadius)
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{
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this->Internals->UseVariableRadius = useVariableRadius;
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}
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void MapperCylinder::SetRadius(const vtkm::Float32& radius)
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{
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if (radius <= 0.f)
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{
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throw vtkm::cont::ErrorBadValue("MapperCylinder: radius must be positive");
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}
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this->Internals->Radius = radius;
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}
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void MapperCylinder::SetRadiusDelta(const vtkm::Float32& delta)
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{
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this->Internals->Delta = delta;
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}
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void MapperCylinder::RenderCellsImpl(const vtkm::cont::UnknownCellSet& cellset,
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const vtkm::cont::CoordinateSystem& coords,
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const vtkm::cont::Field& scalarField,
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const vtkm::cont::ColorTable& vtkmNotUsed(colorTable),
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const vtkm::rendering::Camera& camera,
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const vtkm::Range& scalarRange,
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const vtkm::cont::Field& vtkmNotUsed(ghostField))
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{
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raytracing::Logger* logger = raytracing::Logger::GetInstance();
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logger->OpenLogEntry("mapper_cylinder");
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vtkm::cont::Timer tot_timer;
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tot_timer.Start();
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vtkm::cont::Timer timer;
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vtkm::Bounds shapeBounds;
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raytracing::CylinderExtractor cylExtractor;
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vtkm::Float32 baseRadius = this->Internals->Radius;
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if (baseRadius == -1.f)
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{
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// set a default radius
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vtkm::cont::ArrayHandle<vtkm::Float32> dist;
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vtkm::worklet::DispatcherMapField<CalcDistance>(CalcDistance(camera.GetPosition()))
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.Invoke(coords, dist);
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vtkm::Float32 min_dist =
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vtkm::cont::Algorithm::Reduce(dist, vtkm::Infinity<vtkm::Float32>(), vtkm::Minimum());
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baseRadius = 0.576769694f * min_dist - 0.603522029f * vtkm::Pow(vtkm::Float32(min_dist), 2.f) +
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0.232171175f * vtkm::Pow(vtkm::Float32(min_dist), 3.f) -
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0.038697244f * vtkm::Pow(vtkm::Float32(min_dist), 4.f) +
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0.002366979f * vtkm::Pow(vtkm::Float32(min_dist), 5.f);
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baseRadius /= min_dist;
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vtkm::worklet::DispatcherMapField<vtkm::rendering::raytracing::MemSet<vtkm::Float32>>(
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vtkm::rendering::raytracing::MemSet<vtkm::Float32>(baseRadius))
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.Invoke(cylExtractor.GetRadii());
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}
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if (this->Internals->UseVariableRadius)
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{
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vtkm::Float32 minRadius = baseRadius - baseRadius * this->Internals->Delta;
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vtkm::Float32 maxRadius = baseRadius + baseRadius * this->Internals->Delta;
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cylExtractor.ExtractCells(cellset, scalarField, minRadius, maxRadius);
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}
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else
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{
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cylExtractor.ExtractCells(cellset, baseRadius);
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}
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//
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// Add supported shapes
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//
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if (cylExtractor.GetNumberOfCylinders() > 0)
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{
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auto cylIntersector = std::make_shared<raytracing::CylinderIntersector>();
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cylIntersector->SetData(coords, cylExtractor.GetCylIds(), cylExtractor.GetRadii());
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this->Internals->Tracer.AddShapeIntersector(cylIntersector);
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shapeBounds.Include(cylIntersector->GetShapeBounds());
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}
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//
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// Create rays
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//
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vtkm::Int32 width = (vtkm::Int32)this->Internals->Canvas->GetWidth();
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vtkm::Int32 height = (vtkm::Int32)this->Internals->Canvas->GetHeight();
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this->Internals->RayCamera.SetParameters(camera, width, height);
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this->Internals->RayCamera.CreateRays(this->Internals->Rays, shapeBounds);
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this->Internals->Rays.Buffers.at(0).InitConst(0.f);
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raytracing::RayOperations::MapCanvasToRays(
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this->Internals->Rays, camera, *this->Internals->Canvas);
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this->Internals->Tracer.SetField(scalarField, scalarRange);
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this->Internals->Tracer.GetCamera() = this->Internals->RayCamera;
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this->Internals->Tracer.SetColorMap(this->ColorMap);
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this->Internals->Tracer.Render(this->Internals->Rays);
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timer.Start();
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this->Internals->Canvas->WriteToCanvas(
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this->Internals->Rays, this->Internals->Rays.Buffers.at(0).Buffer, camera);
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if (this->Internals->CompositeBackground)
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{
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this->Internals->Canvas->BlendBackground();
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}
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vtkm::Float64 time = timer.GetElapsedTime();
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logger->AddLogData("write_to_canvas", time);
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time = tot_timer.GetElapsedTime();
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logger->CloseLogEntry(time);
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}
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void MapperCylinder::SetCompositeBackground(bool on)
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{
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this->Internals->CompositeBackground = on;
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}
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vtkm::rendering::Mapper* MapperCylinder::NewCopy() const
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{
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return new vtkm::rendering::MapperCylinder(*this);
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}
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}
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} // vtkm::rendering
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