mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-05 09:59:12 +00:00
236 lines
6.3 KiB
C++
236 lines
6.3 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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#include <vtkm/rendering/MapperPoint.h>
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#include <vtkm/cont/Timer.h>
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#include <vtkm/rendering/CanvasRayTracer.h>
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#include <vtkm/rendering/internal/RunTriangulator.h>
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#include <vtkm/rendering/raytracing/Camera.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/SphereExtractor.h>
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#include <vtkm/rendering/raytracing/SphereIntersector.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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struct MapperPoint::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 PointRadius;
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bool UseNodes;
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vtkm::Float32 PointDelta;
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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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, PointRadius(-1.f)
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, UseNodes(true)
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, PointDelta(0.5f)
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, UseVariableRadius(false)
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{
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}
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};
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MapperPoint::MapperPoint()
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: Internals(new InternalsType)
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{
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}
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MapperPoint::~MapperPoint()
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{
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}
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void MapperPoint::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("MapperPoint: 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* MapperPoint::GetCanvas() const
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{
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return this->Internals->Canvas;
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}
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void MapperPoint::UseCells()
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{
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this->Internals->UseNodes = false;
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}
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void MapperPoint::UseNodes()
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{
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this->Internals->UseNodes = true;
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}
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void MapperPoint::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("MapperPoint: point radius must be positive");
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}
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this->Internals->PointRadius = radius;
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}
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void MapperPoint::SetRadiusDelta(const vtkm::Float32& delta)
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{
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this->Internals->PointDelta = delta;
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}
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void MapperPoint::UseVariableRadius(bool useVariableRadius)
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{
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this->Internals->UseVariableRadius = useVariableRadius;
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}
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void MapperPoint::RenderCells(const vtkm::cont::DynamicCellSet& 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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{
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raytracing::Logger* logger = raytracing::Logger::GetInstance();
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// make sure we start fresh
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this->Internals->Tracer.Clear();
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logger->OpenLogEntry("mapper_ray_tracer");
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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 coordBounds = coords.GetBounds();
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vtkm::Float32 baseRadius = this->Internals->PointRadius;
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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::Float64 lx = coordBounds.X.Length();
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vtkm::Float64 ly = coordBounds.Y.Length();
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vtkm::Float64 lz = coordBounds.Z.Length();
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vtkm::Float64 mag = vtkm::Sqrt(lx * lx + ly * ly + lz * lz);
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// same as used in vtk ospray
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constexpr vtkm::Float64 heuristic = 500.;
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baseRadius = static_cast<vtkm::Float32>(mag / heuristic);
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}
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vtkm::Bounds shapeBounds;
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raytracing::SphereExtractor sphereExtractor;
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if (this->Internals->UseVariableRadius)
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{
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vtkm::Float32 minRadius = baseRadius - baseRadius * this->Internals->PointDelta;
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vtkm::Float32 maxRadius = baseRadius + baseRadius * this->Internals->PointDelta;
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if (this->Internals->UseNodes)
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{
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sphereExtractor.ExtractCoordinates(coords, scalarField, minRadius, maxRadius);
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}
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else
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{
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sphereExtractor.ExtractCells(cellset, scalarField, minRadius, maxRadius);
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}
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}
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else
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{
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if (this->Internals->UseNodes)
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{
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sphereExtractor.ExtractCoordinates(coords, baseRadius);
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}
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else
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{
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sphereExtractor.ExtractCells(cellset, baseRadius);
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}
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}
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if (sphereExtractor.GetNumberOfSpheres() > 0)
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{
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auto sphereIntersector = std::make_shared<raytracing::SphereIntersector>();
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sphereIntersector->SetData(coords, sphereExtractor.GetPointIds(), sphereExtractor.GetRadii());
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this->Internals->Tracer.AddShapeIntersector(sphereIntersector);
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shapeBounds.Include(sphereIntersector->GetShapeBounds());
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}
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//
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// Create rays
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//
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vtkm::rendering::raytracing::Camera& cam = this->Internals->Tracer.GetCamera();
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cam.SetParameters(camera, *this->Internals->Canvas);
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this->Internals->RayCamera.SetParameters(camera, *this->Internals->Canvas);
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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.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 MapperPoint::SetCompositeBackground(bool on)
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{
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this->Internals->CompositeBackground = on;
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}
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void MapperPoint::StartScene()
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{
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// Nothing needs to be done.
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}
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void MapperPoint::EndScene()
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{
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// Nothing needs to be done.
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}
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vtkm::rendering::Mapper* MapperPoint::NewCopy() const
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{
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return new vtkm::rendering::MapperPoint(*this);
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}
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}
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} // vtkm::rendering
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