mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
270 lines
7.6 KiB
C++
270 lines
7.6 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/Math.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/Initialize.h>
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#include <vtkm/filter/Tetrahedralize.h>
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#include <vtkm/cont/testing/Testing.h>
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//Suppress warnings about glut being deprecated on OSX
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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#endif
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#if defined(__APPLE__)
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#include <GLUT/glut.h>
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#else
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#include <GL/glut.h>
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#endif
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#include "../isosurface/quaternion.h"
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// Default size of the example
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static vtkm::Id3 dims(4, 4, 4);
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static vtkm::Id cellsToDisplay = 64;
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// Takes input uniform grid and outputs unstructured grid of tets
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static vtkm::cont::DataSet tetDataSet;
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// OpenGL display variables
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static Quaternion qrot;
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static int lastx, lasty;
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static int mouse_state = 1;
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//
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// Construct an input data set with uniform grid of indicated dimensions, origin and spacing
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//
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vtkm::cont::DataSet MakeTetrahedralizeTestDataSet(vtkm::Id3 dim)
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{
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vtkm::cont::DataSet dataSet;
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// Place uniform grid on a set physical space so OpenGL drawing is easier
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const vtkm::Id3 vdims(dim[0] + 1, dim[1] + 1, dim[2] + 1);
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const vtkm::Vec<vtkm::Float32, 3> origin = vtkm::make_Vec(0.0f, 0.0f, 0.0f);
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const vtkm::Vec<vtkm::Float32, 3> spacing =
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vtkm::make_Vec(1.0f / static_cast<vtkm::Float32>(dim[0]),
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1.0f / static_cast<vtkm::Float32>(dim[1]),
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1.0f / static_cast<vtkm::Float32>(dim[2]));
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// Generate coordinate system
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vtkm::cont::ArrayHandleUniformPointCoordinates coordinates(vdims, origin, spacing);
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dataSet.AddCoordinateSystem(vtkm::cont::CoordinateSystem("coordinates", coordinates));
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// Generate cell set
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vtkm::cont::CellSetStructured<3> cellSet("cells");
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cellSet.SetPointDimensions(vdims);
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dataSet.AddCellSet(cellSet);
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return dataSet;
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}
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//
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// Initialize the OpenGL state
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//
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void initializeGL()
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{
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glEnable(GL_DEPTH_TEST);
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glShadeModel(GL_SMOOTH);
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float white[] = { 0.8f, 0.8f, 0.8f, 1.0f };
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float black[] = { 0.0f, 0.0f, 0.0f, 1.0f };
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float lightPos[] = { 10.0f, 10.0f, 10.5f, 1.0f };
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glLightfv(GL_LIGHT0, GL_AMBIENT, white);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
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glLightfv(GL_LIGHT0, GL_SPECULAR, black);
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glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glEnable(GL_NORMALIZE);
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glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
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glEnable(GL_COLOR_MATERIAL);
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}
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//
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// Render the output using simple OpenGL
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//
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void displayCall()
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glEnable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0f, 1.0f, 1.0f, 20.0f);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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gluLookAt(0.0f, 0.0f, 3.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
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glLineWidth(3.0f);
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glPushMatrix();
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float rotationMatrix[16];
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qrot.getRotMat(rotationMatrix);
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glMultMatrixf(rotationMatrix);
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glTranslatef(-0.5f, -0.5f, -0.5f);
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// Get the cell set, coordinate system and coordinate data
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vtkm::cont::CellSetSingleType<> cellSet;
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tetDataSet.GetCellSet(0).CopyTo(cellSet);
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auto vertexArray = tetDataSet.GetCoordinateSystem().GetData();
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// Draw the five tetrahedra belonging to each hexadron
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vtkm::Id tetra = 0;
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vtkm::Float32 color[5][3] = { { 1.0f, 0.0f, 0.0f },
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{ 0.0f, 1.0f, 0.0f },
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{ 0.0f, 0.0f, 1.0f },
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{ 1.0f, 0.0f, 1.0f },
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{ 1.0f, 1.0f, 0.0f } };
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for (vtkm::Id hex = 0; hex < cellsToDisplay; hex++)
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{
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for (vtkm::Id j = 0; j < 5; j++)
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{
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vtkm::Id indx = tetra % 5;
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glColor3f(color[indx][0], color[indx][1], color[indx][2]);
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// Get the indices of the vertices that make up this tetrahedron
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vtkm::Vec<vtkm::Id, 4> tetIndices;
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cellSet.GetIndices(tetra, tetIndices);
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// Get the vertex points for this tetrahedron
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auto pt0 = vertexArray.GetPortalConstControl().Get(tetIndices[0]);
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auto pt1 = vertexArray.GetPortalConstControl().Get(tetIndices[1]);
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auto pt2 = vertexArray.GetPortalConstControl().Get(tetIndices[2]);
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auto pt3 = vertexArray.GetPortalConstControl().Get(tetIndices[3]);
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// Draw the tetrahedron filled with alternating colors
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glBegin(GL_TRIANGLE_STRIP);
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glVertex3d(pt0[0], pt0[1], pt0[2]);
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glVertex3d(pt1[0], pt1[1], pt1[2]);
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glVertex3d(pt2[0], pt2[1], pt2[2]);
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glVertex3d(pt3[0], pt3[1], pt3[2]);
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glVertex3d(pt0[0], pt0[1], pt0[2]);
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glVertex3d(pt1[0], pt1[1], pt1[2]);
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glEnd();
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// Draw the tetrahedron wireframe
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glColor3f(1.0f, 1.0f, 1.0f);
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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glBegin(GL_TRIANGLE_STRIP);
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glVertex3d(pt0[0], pt0[1], pt0[2]);
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glVertex3d(pt1[0], pt1[1], pt1[2]);
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glVertex3d(pt2[0], pt2[1], pt2[2]);
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glVertex3d(pt3[0], pt3[1], pt3[2]);
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glVertex3d(pt0[0], pt0[1], pt0[2]);
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glVertex3d(pt1[0], pt1[1], pt1[2]);
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glEnd();
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tetra++;
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}
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}
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glPopMatrix();
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glutSwapBuffers();
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}
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// Allow rotations of the view
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void mouseMove(int x, int y)
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{
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vtkm::Float32 dx = static_cast<vtkm::Float32>(x - lastx);
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vtkm::Float32 dy = static_cast<vtkm::Float32>(y - lasty);
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if (mouse_state == 0)
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{
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Quaternion newRotX;
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newRotX.setEulerAngles(-0.2f * dx * vtkm::Pi_180f(), 0.0f, 0.0f);
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qrot.mul(newRotX);
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Quaternion newRotY;
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newRotY.setEulerAngles(0.0f, 0.0f, -0.2f * dy * vtkm::Pi_180f());
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qrot.mul(newRotY);
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}
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lastx = x;
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lasty = y;
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glutPostRedisplay();
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}
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// Respond to mouse button
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void mouseCall(int button, int state, int x, int y)
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{
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if (button == 0)
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mouse_state = state;
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if ((button == 0) && (state == 0))
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{
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lastx = x;
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lasty = y;
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}
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}
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// Tetrahedralize and render uniform grid example
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int main(int argc, char* argv[])
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{
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// Process vtk-m general args
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auto opts = vtkm::cont::InitializeOptions::DefaultAnyDevice;
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auto config = vtkm::cont::Initialize(argc, argv, opts);
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std::cout << "TetrahedralizeUniformGrid Example" << std::endl;
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std::cout << "Parameters are [options] [xdim ydim zdim [# of cellsToDisplay]]" << std::endl;
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std::cout << config.Usage << std::endl << std::endl;
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// Set the problem size and number of cells to display from command line
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if (argc >= 4)
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{
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dims[0] = atoi(argv[1]);
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dims[1] = atoi(argv[2]);
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dims[2] = atoi(argv[3]);
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cellsToDisplay = dims[0] * dims[1] * dims[2];
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}
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if (argc == 5)
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{
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cellsToDisplay = atoi(argv[4]);
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}
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// Create the input uniform cell set
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vtkm::cont::DataSet inDataSet = MakeTetrahedralizeTestDataSet(dims);
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vtkm::filter::Tetrahedralize tetrahedralize;
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tetDataSet = tetrahedralize.Execute(inDataSet);
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// Render the output dataset of tets
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lastx = lasty = 0;
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glutInit(&argc, argv);
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glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
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glutInitWindowSize(1000, 1000);
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glutCreateWindow("VTK-m Uniform Tetrahedralize");
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initializeGL();
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glutDisplayFunc(displayCall);
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glutMotionFunc(mouseMove);
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glutMouseFunc(mouseCall);
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glutMainLoop();
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tetDataSet.Clear();
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return 0;
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}
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#if (defined(VTKM_GCC) || defined(VTKM_CLANG))
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#pragma GCC diagnostic pop
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#endif
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