PointMass.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 "PointMass.h"
#include <OpenCAL/System.h>
#include <OpenCAL/Renderer.h>
#include <OpenCAL/PhaseSpace.h>
using namespace OpenCAL;

#include <OpenCAL/Material.h>
using Utils::Material;

using namespace std;


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

PointMass::PointMass(System *parent, float mass)
: PhysicalObject(parent, mass)
{
    // Don't draw a point mass by default (mostly used in agregates)
    m_draw = false;
}

PointMass::~PointMass()
{
}


/******************
* Other functions *
******************/

void PointMass::render()
{
    Renderer *renderer = m_parent->getRenderer();
    if(!renderer) return;

    renderer->renderPoint(m_position, 2.0f);
}

void PointMass::addToState(PhaseSpace *state)
{
    state->concat(m_position);
    state->concat(m_velocity);
}

void PointMass::addToDerivative(PhaseSpace *deriv)
{
    bool fixed = isFixed();

    deriv->concat(fixed ? Vector3::zero : getVelocity());
    deriv->concat(fixed ? Vector3::zero : getAccelleration());
}

void PointMass::fromState(PhaseSpace *state)
{
    if(isFixed())
        state->skip(6);
    else
    {
        m_position.setX(state->getNext());
        m_position.setY(state->getNext());
        m_position.setZ(state->getNext());

        m_velocity.setX(state->getNext());
        m_velocity.setY(state->getNext());
        m_velocity.setZ(state->getNext());
    }

    // @warning Should this be done here?
    m_force = Vector3::zero;
}

/*
#ifdef USE_OPENGL
void PointMass::drawGL()
{
    //if(!m_draw) return;

    Utils::Material mat;
    mat.applyGL();

    // Draw the point mass
    glBegin(GL_POINTS);
        glVertex3fv(m_position);
    glEnd();
}
#endif // USE_OPENGL
*/


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

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