293 lines
8.5 KiB
C++
293 lines
8.5 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 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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#ifndef VTKM_DEVICE_ADAPTER
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#define VTKM_DEVICE_ADAPTER VTKM_DEVICE_ADAPTER_SERIAL
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#endif
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#include <vtkm/Math.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/StreamLineUniformGrid.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <fstream>
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#include <math.h>
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#include <vector>
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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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using DeviceAdapter = VTKM_DEFAULT_DEVICE_ADAPTER_TAG;
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// Output data set shared with opengl
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static vtkm::worklet::StreamLineFilterUniformGrid<vtkm::Float32, DeviceAdapter>* streamLineFilter;
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static vtkm::cont::DataSet outDataSet;
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// Input parameters
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const vtkm::Id nSeeds = 25;
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const vtkm::Id nSteps = 2000;
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const vtkm::Float32 tStep = 0.5f;
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const vtkm::Id direction = vtkm::worklet::internal::BOTH;
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// Point location of vertices from a CastAndCall but needs a static cast eventually
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static vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32, 3>> vertexArray;
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// OpenGL display variables
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Quaternion qrot;
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int lastx, lasty;
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int mouse_state = 1;
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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(60.0f, 1.0f, 1.0f, 100.0f);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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gluLookAt(0.0f, 0.0f, 100.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
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glLineWidth(1.0f);
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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::CellSetExplicit<> cellSet;
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outDataSet.GetCellSet(0).CopyTo(cellSet);
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auto coordArray = outDataSet.GetCoordinateSystem().GetData();
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vtkm::Id numberOfCells = cellSet.GetNumberOfCells();
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vtkm::cont::ArrayCopy(coordArray, vertexArray);
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// Each cell is a polyline
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glColor3f(1.0f, 0.0f, 0.0f);
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for (vtkm::Id polyline = 0; polyline < numberOfCells; polyline++)
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{
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vtkm::Vec<vtkm::Id, nSteps> polylineIndices;
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vtkm::IdComponent numIndices = cellSet.GetNumberOfPointsInCell(polyline);
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cellSet.GetIndices(polyline, polylineIndices);
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glBegin(GL_LINE_STRIP);
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for (vtkm::IdComponent i = 0; i < numIndices; i++)
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{
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vtkm::Vec<vtkm::Float32, 3> pt = vertexArray.GetPortalConstControl().Get(polylineIndices[i]);
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glVertex3f(pt[0], pt[1], pt[2]);
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}
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glEnd();
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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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vtkm::Float32 pi = static_cast<float>(vtkm::Pi());
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Quaternion newRotX;
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newRotX.setEulerAngles(-0.2f * dx * pi / 180.0f, 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 * pi / 180.0f);
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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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namespace
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{
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template <typename T>
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VTKM_EXEC_CONT vtkm::Vec<T, 3> Normalize(vtkm::Vec<T, 3> v)
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{
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T magnitude = static_cast<T>(sqrt(vtkm::dot(v, v)));
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T zero = static_cast<T>(0.0);
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T one = static_cast<T>(1.0);
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if (magnitude == zero)
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return vtkm::make_Vec(zero, zero, zero);
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else
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return one / magnitude * v;
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}
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}
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// Run streamlines on a uniform grid of vector data
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int main(int argc, char* argv[])
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{
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std::cout << "StreamLineUniformGrid Example" << std::endl;
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std::cout << "Parameters are fileName [numSeeds maxSteps timeStep direction]" << std::endl
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<< std::endl;
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std::cout << "Direction is FORWARD=0 BACKWARD=1 BOTH=2" << std::endl << std::endl;
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std::cout << "File is expected to be binary with xdim ydim zdim as 32 bit integers " << std::endl;
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std::cout << "followed by vector data per dimension point as 32 bit float" << std::endl;
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// Read in the vector data for testing
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FILE* pFile = fopen(argv[1], "rb");
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if (pFile == nullptr)
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perror("Error opening file");
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size_t ret_code = 0;
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// Size of the dataset
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int dims[3];
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ret_code = fread(dims, sizeof(int), 3, pFile);
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if (ret_code != 3)
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{
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perror("Error reading size of data");
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fclose(pFile);
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return 0;
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}
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const vtkm::Id3 vdims(dims[0], dims[1], dims[2]);
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// Read vector data at each point of the uniform grid and store
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vtkm::Id nElements = vdims[0] * vdims[1] * vdims[2] * 3;
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float* data = new float[static_cast<std::size_t>(nElements)];
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ret_code = fread(data, sizeof(float), static_cast<std::size_t>(nElements), pFile);
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if (ret_code != static_cast<size_t>(nElements))
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{
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perror("Error reading vector data");
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fclose(pFile);
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return 0;
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}
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//We are done with the file now, so release the file descriptor
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fclose(pFile);
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std::vector<vtkm::Vec<vtkm::Float32, 3>> field;
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for (vtkm::Id i = 0; i < nElements; i++)
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{
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vtkm::Float32 x = data[i];
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vtkm::Float32 y = data[++i];
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vtkm::Float32 z = data[++i];
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vtkm::Vec<vtkm::Float32, 3> vecData(x, y, z);
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field.push_back(Normalize(vecData));
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}
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32, 3>> fieldArray;
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fieldArray = vtkm::cont::make_ArrayHandle(field);
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// Construct the input dataset (uniform) to hold the input and set vector data
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vtkm::cont::DataSet inDataSet;
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vtkm::cont::ArrayHandleUniformPointCoordinates coordinates(vdims);
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inDataSet.AddCoordinateSystem(vtkm::cont::CoordinateSystem("coordinates", coordinates));
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inDataSet.AddField(vtkm::cont::Field("vecData", vtkm::cont::Field::ASSOC_POINTS, fieldArray));
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vtkm::cont::CellSetStructured<3> inCellSet("cells");
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inCellSet.SetPointDimensions(vtkm::make_Vec(vdims[0], vdims[1], vdims[2]));
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inDataSet.AddCellSet(inCellSet);
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// Create and run the filter
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streamLineFilter = new vtkm::worklet::StreamLineFilterUniformGrid<vtkm::Float32, DeviceAdapter>();
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outDataSet = streamLineFilter->Run(inDataSet, direction, nSeeds, nSteps, tStep);
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// Render the output dataset of polylines
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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 3D StreamLines");
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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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delete streamLineFilter;
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outDataSet.Clear();
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vertexArray.ReleaseResources();
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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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