Commit 1edc4650 authored by Robert Maynard's avatar Robert Maynard
Browse files

Add a demo for GTC2016 that covers io/filters/rendering.

parent 7543bfe1
......@@ -21,6 +21,7 @@
##=============================================================================
add_subdirectory(clipping)
add_subdirectory(demo)
add_subdirectory(hello_world)
add_subdirectory(isosurface)
add_subdirectory(multi_backend)
......
##=============================================================================
##
## Copyright (c) Kitware, Inc.
## All rights reserved.
## See LICENSE.txt for details.
##
## This software is distributed WITHOUT ANY WARRANTY; without even
## the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
## PURPOSE. See the above copyright notice for more information.
##
## Copyright 2015 Sandia Corporation.
## Copyright 2015 UT-Battelle, LLC.
## Copyright 2015 Los Alamos National Security.
##
## Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
## the U.S. Government retains certain rights in this software.
## Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
## Laboratory (LANL), the U.S. Government retains certain rights in
## this software.
##
##=============================================================================
find_package(MESA REQUIRED)
if(VTKm_CUDA_FOUND)
cuda_add_executable(Demo Demo.cu)
else()
add_executable(Demo Demo.cxx)
endif()
target_include_directories(Demo PRIVATE ${OSMESA_INCLUDE_DIR})
target_link_libraries(Demo ${OSMESA_LIBRARY} ${VTKm_LIBRARIES})
target_compile_options(Demo PRIVATE ${VTKm_COMPILE_OPTIONS})
//============================================================================
// Copyright (c) Kitware, Inc.
// All rights reserved.
// See LICENSE.txt for details.
// This software is distributed WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE. See the above copyright notice for more information.
//
// Copyright 2014 Sandia Corporation.
// Copyright 2014 UT-Battelle, LLC.
// Copyright 2014 Los Alamos National Security.
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
// Laboratory (LANL), the U.S. Government retains certain rights in
// this software.
//============================================================================
#define BOOST_SP_DISABLE_THREADS
#include "Demo.cxx"
\ No newline at end of file
//============================================================================
// Copyright (c) Kitware, Inc.
// All rights reserved.
// See LICENSE.txt for details.
// This software is distributed WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE. See the above copyright notice for more information.
//
// Copyright 2014 Sandia Corporation.
// Copyright 2014 UT-Battelle, LLC.
// Copyright 2014 Los Alamos National Security.
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
// Laboratory (LANL), the U.S. Government retains certain rights in
// this software.
//============================================================================
#include <vtkm/cont/testing/MakeTestDataSet.h>
#include <vtkm/rendering/Window.h>
#include <vtkm/rendering/RenderSurface.h>
#include <vtkm/rendering/Scene.h>
#include <vtkm/rendering/Plot.h>
#include <vtkm/rendering/SceneRendererOSMesa.h>
#include <vtkm/cont/DeviceAdapter.h>
#include <vtkm/cont/testing/Testing.h>
#include <vtkm/io/reader/VTKDataSetReader.h>
#include <vtkm/filter/MarchingCubes.h>
#include <vtkm/cont/DataSetFieldAdd.h>
#include <iostream>
// This example reads an input vtk file specified on the command-line (or generates a default
// input data set if none is provided), uses VTK-m's rendering engine to render it to an
// output file using OS Mesa, instantiates an isosurface filter using VTK-m's filter
// mechanism, computes an isosurface on the input data set, packages the output of the filter
// in a new data set, and renders this output data set in a separate iamge file, again
// using VTK-m's rendering engine with OS Mesa.
int main(int argc, char* argv[])
{
// Input variable declarations
vtkm::cont::DataSet inputData;
vtkm::Float32 isovalue;
std::string fieldName;
// Get input data from specified file, or generate test data set
if (argc < 3)
{
vtkm::cont::testing::MakeTestDataSet maker;
inputData = maker.Make3DUniformDataSet0();
isovalue = 100.0f;
fieldName = "pointvar";
}
else
{
std::cout << "using: " << argv[1] << " as MarchingCubes input file" << std::endl;
vtkm::io::reader::VTKDataSetReader reader(argv[1]);
inputData = reader.ReadDataSet();
isovalue = atof(argv[2]);
fieldName = "SCALARS:pointvar";
}
typedef vtkm::rendering::SceneRendererOSMesa< > SceneRenderer;
typedef vtkm::rendering::RenderSurfaceOSMesa RenderSurface;
// Set up a view for rendering the input data
const vtkm::cont::CoordinateSystem coords = inputData.GetCoordinateSystem();
SceneRenderer sceneRenderer;
vtkm::rendering::View3D &view = sceneRenderer.GetView();
vtkm::Float64 coordsBounds[6];
coords.GetBounds(coordsBounds,VTKM_DEFAULT_DEVICE_ADAPTER_TAG());
vtkm::Vec<vtkm::Float32,3> totalExtent;
totalExtent[0] = vtkm::Float32(coordsBounds[1] - coordsBounds[0]);
totalExtent[1] = vtkm::Float32(coordsBounds[3] - coordsBounds[2]);
totalExtent[2] = vtkm::Float32(coordsBounds[5] - coordsBounds[4]);
vtkm::Float32 mag = vtkm::Magnitude(totalExtent);
vtkm::Normalize(totalExtent);
view.LookAt = totalExtent * (mag * .5f);
view.Up = vtkm::make_Vec(0.f, 1.f, 0.f);
view.NearPlane = 1.f;
view.FarPlane = 100.f;
view.FieldOfView = 60.f;
view.Height = 512;
view.Width = 512;
view.Position = totalExtent * (mag * 2.f);
vtkm::rendering::ColorTable colorTable("thermal");
sceneRenderer.SetActiveColorTable(colorTable);
sceneRenderer.SetView(view);
// Create a scene for rendering the input data
vtkm::rendering::Scene3D scene;
vtkm::rendering::Color bg(0.2f, 0.2f, 0.2f, 1.0f);
vtkm::rendering::RenderSurfaceOSMesa surface(512,512,bg);
scene.plots.push_back(vtkm::rendering::Plot(inputData.GetCellSet(),
inputData.GetCoordinateSystem(),
inputData.GetField(fieldName),
colorTable));
// Create a window and use it to render the input data using OS Mesa
vtkm::rendering::Window3D<SceneRenderer, RenderSurface> w1(scene,
sceneRenderer,
surface,
bg);
w1.Initialize();
w1.Paint();
w1.SaveAs("demo_input.pnm");
// Create an isosurface filter
vtkm::filter::MarchingCubes filter;
filter.SetGenerateNormals(false);
filter.SetMergeDuplicatePoints(false);
filter.SetIsoValue(isovalue);
vtkm::filter::DataSetResult result = filter.Execute( inputData,
inputData.GetField(fieldName) );
filter.MapFieldOntoOutput(result, inputData.GetField(fieldName));
vtkm::cont::DataSet& outputData = result.GetDataSet();
// Render a separate image with the output isosurface
std::cout << "about to plot the results of the MarchingCubes filter" << std::endl;
scene.plots.clear();
scene.plots.push_back(vtkm::rendering::Plot(outputData.GetCellSet(),
outputData.GetCoordinateSystem(),
outputData.GetField(fieldName),
colorTable));
vtkm::rendering::Window3D< SceneRenderer, RenderSurface> w2(scene,
sceneRenderer,
surface,
bg);
w2.Initialize();
w2.Paint();
w2.SaveAs("demo_output.pnm");
return 0;
}
# vtk DataFile Version 1.0
Grid example
ASCII
DATASET STRUCTURED_POINTS
DIMENSIONS 3 2 3
SPACING 1 1 1
ORIGIN 0 0 0
POINT_DATA 18
SCALARS pointvar float 1
LOOKUP_TABLE default
10.1
20.1
30.1
40.1
50.2
60.2
70.2
80.2
90.3
100.3
110.3
120.3
130.4
140.4
150.4
160.4
170.5
180.5
\ No newline at end of file
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