146 lines
5.5 KiB
C++
146 lines
5.5 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 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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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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#ifndef vtk_m_rendering_SceneRendererGL_h
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#define vtk_m_rendering_SceneRendererGL_h
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/CoordinateSystem.h>
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#include <vtkm/cont/DynamicArrayHandle.h>
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#include <vtkm/rendering/SceneRenderer.h>
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#include <vtkm/rendering/ColorTable.h>
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#include <vtkm/rendering/View.h>
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#include <vtkm/rendering/Triangulator.h>
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#include <GL/gl.h>
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#include <stdio.h>
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#include <iostream>
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#include <fstream>
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namespace vtkm {
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namespace rendering {
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template<typename DeviceAdapter = VTKM_DEFAULT_DEVICE_ADAPTER_TAG>
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class SceneRendererGL : public SceneRenderer
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{
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public:
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VTKM_CONT_EXPORT
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SceneRendererGL() {}
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VTKM_CONT_EXPORT
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virtual void RenderCells(const vtkm::cont::DynamicCellSet &cellset,
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const vtkm::cont::CoordinateSystem &coords,
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vtkm::cont::Field &scalarField,
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const vtkm::rendering::ColorTable &colorTable,
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vtkm::rendering::View &,
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vtkm::Float64 *scalarBounds)
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{
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vtkm::cont::ArrayHandle< vtkm::Vec<vtkm::Id, 4> > indices;
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vtkm::Id numTri;
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Triangulator<DeviceAdapter> triangulator;
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triangulator.run(cellset, indices, numTri);
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vtkm::cont::ArrayHandle<vtkm::Float32> sf;
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sf = scalarField.GetData().Cast<vtkm::cont::ArrayHandle<vtkm::Float32> >();
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vtkm::cont::DynamicArrayHandleCoordinateSystem dcoords = coords.GetData();
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vtkm::cont::ArrayHandleUniformPointCoordinates uVerts;
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vtkm::cont::ArrayHandle< vtkm::Vec<vtkm::Float32,3> > eVerts;
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if(dcoords.IsSameType(vtkm::cont::ArrayHandleUniformPointCoordinates()))
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{
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uVerts = dcoords.Cast<vtkm::cont::ArrayHandleUniformPointCoordinates>();
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RenderTriangles(numTri, uVerts, indices, sf, colorTable, scalarBounds);
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}
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else if(dcoords.IsSameType(vtkm::cont::ArrayHandle< vtkm::Vec<vtkm::Float32,3> >()))
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{
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eVerts = dcoords.Cast<vtkm::cont::ArrayHandle< vtkm::Vec<vtkm::Float32,3> > > ();
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RenderTriangles(numTri, eVerts, indices, sf, colorTable, scalarBounds);
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}
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else if(dcoords.IsSameType(vtkm::cont::ArrayHandleCartesianProduct<
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> >()))
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{
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vtkm::cont::ArrayHandleCartesianProduct<
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> > rVerts;
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rVerts = dcoords.Cast<vtkm::cont::ArrayHandleCartesianProduct<
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault>,
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> > > ();
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RenderTriangles(numTri, rVerts, indices, sf, colorTable, scalarBounds);
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}
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glFinish();
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glFlush();
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}
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template <typename PtType>
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VTKM_CONT_EXPORT
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void RenderTriangles(vtkm::Id numTri, const PtType &verts,
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const vtkm::cont::ArrayHandle< vtkm::Vec<vtkm::Id, 4> > &indices,
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const vtkm::cont::ArrayHandle<vtkm::Float32> &scalar,
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const vtkm::rendering::ColorTable &ct,
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vtkm::Float64 *scalarBounds)
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{
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vtkm::Float32 sMin = vtkm::Float32(scalarBounds[0]);
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vtkm::Float32 sMax = vtkm::Float32(scalarBounds[1]);
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vtkm::Float32 sDiff = sMax-sMin;
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glBegin(GL_TRIANGLES);
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for (int i = 0; i < numTri; i++)
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{
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vtkm::Vec<vtkm::Id, 4> idx = indices.GetPortalConstControl().Get(i);
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vtkm::Id i1 = idx[1];
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vtkm::Id i2 = idx[2];
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vtkm::Id i3 = idx[3];
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vtkm::Vec<vtkm::Float32, 3> p1 = verts.GetPortalConstControl().Get(idx[1]);
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vtkm::Vec<vtkm::Float32, 3> p2 = verts.GetPortalConstControl().Get(idx[2]);
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vtkm::Vec<vtkm::Float32, 3> p3 = verts.GetPortalConstControl().Get(idx[3]);
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vtkm::Float32 s = scalar.GetPortalConstControl().Get(i1);
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s = (s-sMin)/sDiff;
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Color color = ct.MapRGB(s);
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glColor3fv(color.Components);
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glVertex3f(p1[0],p1[1],p1[2]);
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s = scalar.GetPortalConstControl().Get(i2);
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s = (s-sMin)/sDiff;
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color = ct.MapRGB(s);
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glColor3fv(color.Components);
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glVertex3f(p2[0],p2[1],p2[2]);
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s = scalar.GetPortalConstControl().Get(i3);
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s = (s-sMin)/sDiff;
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color = ct.MapRGB(s);
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glColor3fv(color.Components);
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glVertex3f(p3[0],p3[1],p3[2]);
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}
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glEnd();
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}
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};
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}} //namespace vtkm::rendering
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#endif //vtk_m_rendering_SceneRendererGL_h
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