JellyMesh.cpp

/***************************************************************************
 *   This file is part of OpenCAL: Open Computer Animation Library         *
 *   I created OpenCAL as my master's thesis Computer Science (multimedia) *
 *   at the tUL university in Diepenbeek, Belgium                          *
 *                                                                         *
 *   Copyright (C) 2003-2004 by Jeroen Dierckx                             *
 *   jeroen.dierckx@student.luc.ac.be                                      *
 *                                                                         *
 ***************************************************************************/

// Includes
#include "JellyMesh.h"
#include <OpenCAL/System.h>
#include <OpenCAL/Vertex.h>
#include <OpenCAL/PointMass.h>
#include <OpenCAL/Spring.h>
using namespace OpenCAL;

using namespace std;


/******************************
* Constructors and destructor *
******************************/

JellyMesh::JellyMesh(System *parent, const string &filename, const Vector3 &position)
: MassSpringSystem(parent), m_filename(filename)
{
    constructMesh(position);
}

JellyMesh::~JellyMesh()
{
}


/**********************
* Protected functions *
**********************/

void JellyMesh::constructMesh(const Vector3 &position)
{
    const float stiffness = 10.0f;
    const float damping = 0.2f;
    const float mass = 1.0f; // Mass of the mesh
    float massEach = 1.0f;

    unsigned int i, j;
    Vertex *vertex;
    PointMass *point, *point2;
    Spring *spring;


    // Load the triangle mesh
    m_surface.loadFromFile(m_filename);
    if(m_surface.numVertices() > 0)
        massEach = mass / m_surface.numVertices();


    /*********
    * Points *
    *********/

    for(i = 0; i < m_surface.numVertices(); ++i)
    {
        vertex = m_surface.getVertex(i);
        point = new PointMass(this, massEach);
        point->setPosition(vertex->getPosition() + position);
        vertex->linkPosition(point->getPositionP());
    }


    /**********
    * Springs *
    **********/

    for(i = 0; i < numObjects(); ++i)
    {
        point = getPoint(i);

        for(j = i + 1; j < numObjects(); ++j)
        {
            point2 = getPoint(j);

            spring = new Spring(this, point, point2);
            spring->setStiffness(stiffness);
            spring->setDamping(damping);
        }
    }
}

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