text: /*************************************************************************
   *                                                                       *
   * Vega FEM Simulation Library Version 4.0                               *
   *                                                                       *
   * "massSpringSystem" library, Copyright (C) 2007 CMU, 2009 MIT,         *
   *                                           2018 USC                    *
   * All rights reserved.                                                  *
   *                                                                       *
   * Code authors: Jernej Barbic, Daniel Schroeder                         *
   * http://www.jernejbarbic.com/vega                                      *
   *                                                                       *
   * Research: Jernej Barbic, Hongyi Xu, Yijing Li,                        *
   *           Danyong Zhao, Bohan Wang,                                   *
   *           Fun Shing Sin, Daniel Schroeder,                            *
   *           Doug L. James, Jovan Popovic                                *
   *                                                                       *
   * Funding: National Science Foundation, Link Foundation,                *
   *          Singapore-MIT GAMBIT Game Lab,                               *
   *          Zumberge Research and Innovation Fund at USC,                *
   *          Sloan Foundation, Okawa Foundation,                          *
   *          USC Annenberg Foundation                                     *
   *                                                                       *
   * This library is free software; you can redistribute it and/or         *
   * modify it under the terms of the BSD-style license that is            *
   * included with this library in the file LICENSE.txt                    *
   *                                                                       *
   * This library is distributed in the hope that it will be useful,       *
   * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the file     *
   * LICENSE.TXT for more details.                                         *
   *                                                                       *
   *************************************************************************/
  
  #include "cubicMesh.h"
  #include "massSpringSystemFromCubicMesh.h"
  
  int MassSpringSystemFromCubicMesh::GenerateMassSpringSystem(CubicMesh * cubicMesh, MassSpringSystem ** massSpringSystem, double density, double tensileStiffness, double damping, int addGravity)
  {
    int numParticles;
    double * restPositions;
    int numCubes;
    int * cubes;
    int numVerticesPerElement;
  
    cubicMesh->exportMeshGeometry(&numParticles, &restPositions, &numCubes, &numVerticesPerElement, &cubes);
  
    if (numVerticesPerElement != 8)
    {
      printf("Sanity check error: mesh is not a cube mesh.\n");
      return 1;
    }
  
    *massSpringSystem = new MassSpringSystem(numParticles, restPositions, CUBE, numCubes, cubes, density, tensileStiffness, damping, addGravity);
  
    free(cubes);
    free(restPositions);
  
    return 0;
  }
  
  