136 lines
5.0 KiB
C++
136 lines
5.0 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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// 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/DeviceAdapter.h>
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#include <vtkm/cont/testing/MakeTestDataSet.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <vtkm/rendering/Actor.h>
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#include <vtkm/rendering/CanvasRayTracer.h>
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#include <vtkm/rendering/MapperRayTracer.h>
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#include <vtkm/rendering/Scene.h>
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#include <vtkm/rendering/View3D.h>
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#include <vtkm/io/reader/VTKDataSetReader.h>
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#include <vtkm/cont/DataSetFieldAdd.h>
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#include <vtkm/filter/MarchingCubes.h>
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#include <iostream>
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void makeScene(const vtkm::cont::DataSet& inputData,
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const vtkm::cont::ColorTable& colorTable,
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const std::string& fieldName,
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vtkm::rendering::Scene& scene)
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{
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scene.AddActor(vtkm::rendering::Actor(inputData.GetCellSet(),
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inputData.GetCoordinateSystem(),
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inputData.GetField(fieldName),
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colorTable));
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}
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// This example reads an input vtk file specified on the command-line (or generates a default
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// input data set if none is provided), uses VTK-m's rendering engine to render it to an
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// output file using OS Mesa, instantiates an isosurface filter using VTK-m's filter
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// mechanism, computes an isosurface on the input data set, packages the output of the filter
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// in a new data set, and renders this output data set in a separate iamge file, again
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// using VTK-m's rendering engine with OS Mesa.
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int main(int argc, char* argv[])
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{
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// Input variable declarations
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vtkm::cont::DataSet inputData;
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vtkm::Float32 isovalue;
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std::string fieldName;
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// Get input data from specified file, or generate test data set
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if (argc < 3)
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{
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vtkm::cont::testing::MakeTestDataSet maker;
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inputData = maker.Make3DUniformDataSet0();
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isovalue = 100.0f;
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fieldName = "pointvar";
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}
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else
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{
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std::cout << "using: " << argv[1] << " as MarchingCubes input file" << std::endl;
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vtkm::io::reader::VTKDataSetReader reader(argv[1]);
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inputData = reader.ReadDataSet();
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isovalue = static_cast<vtkm::Float32>(atof(argv[2]));
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fieldName = "SCALARS:pointvar";
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}
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using Mapper = vtkm::rendering::MapperRayTracer;
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using Canvas = vtkm::rendering::CanvasRayTracer;
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// Set up a camera for rendering the input data
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const vtkm::cont::CoordinateSystem coords = inputData.GetCoordinateSystem();
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Mapper mapper;
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vtkm::rendering::Camera camera = vtkm::rendering::Camera();
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//Set3DView
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vtkm::Bounds coordsBounds = coords.GetBounds();
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camera.ResetToBounds(coordsBounds);
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vtkm::Vec<vtkm::Float32, 3> totalExtent;
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totalExtent[0] = vtkm::Float32(coordsBounds.X.Max - coordsBounds.X.Min);
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totalExtent[1] = vtkm::Float32(coordsBounds.Y.Max - coordsBounds.Y.Min);
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totalExtent[2] = vtkm::Float32(coordsBounds.Z.Max - coordsBounds.Z.Min);
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vtkm::Float32 mag = vtkm::Magnitude(totalExtent);
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vtkm::Normalize(totalExtent);
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camera.SetLookAt(totalExtent * (mag * .5f));
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camera.SetViewUp(vtkm::make_Vec(0.f, 1.f, 0.f));
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camera.SetClippingRange(1.f, 100.f);
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camera.SetFieldOfView(60.f);
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camera.SetPosition(totalExtent * (mag * 2.f));
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vtkm::cont::ColorTable colorTable("inferno");
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// Create a scene for rendering the input data
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vtkm::rendering::Scene scene;
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vtkm::rendering::Color bg(0.2f, 0.2f, 0.2f, 1.0f);
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Canvas canvas(512, 512);
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makeScene(inputData, colorTable, fieldName, scene);
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// Create a view and use it to render the input data using OS Mesa
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vtkm::rendering::View3D view(scene, mapper, canvas, camera, bg);
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view.Initialize();
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view.Paint();
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view.SaveAs("demo_input.pnm");
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// Create an isosurface filter
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vtkm::filter::MarchingCubes filter;
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filter.SetGenerateNormals(false);
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filter.SetMergeDuplicatePoints(false);
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filter.SetIsoValue(0, isovalue);
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filter.SetActiveField(fieldName);
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vtkm::cont::DataSet outputData = filter.Execute(inputData);
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// Render a separate image with the output isosurface
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std::cout << "about to render the results of the MarchingCubes filter" << std::endl;
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vtkm::rendering::Scene scene2;
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makeScene(outputData, colorTable, fieldName, scene2);
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vtkm::rendering::View3D view2(scene2, mapper, canvas, camera, bg);
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view2.Initialize();
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view2.Paint();
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view2.SaveAs("demo_output.pnm");
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return 0;
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}
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