OpenSceneGraph/include/osgAnimation/CubicBezier

/*  -*-c++-*- 
 *  Copyright (C) 2008 Cedric Pinson <cedric.pinson@plopbyte.net>
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * 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 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGANIMATION_CUBIC_BEZIER_H
#define OSGANIMATION_CUBIC_BEZIER_H

#include <osg/Vec2>
#include <osg/Vec3>
#include <osg/Vec4>
#include <osg/Quat>

namespace osgAnimation
{

    template <class T>
    struct TemplateCubicBezier
    {
        T mPoint[3];
        const T& getP0() const { return mPoint[0];}
        const T& getP1() const { return mPoint[1];}
        const T& getP2() const { return mPoint[2];}
        TemplateCubicBezier(const T& v0, const T& v1, const T& v2) 
        {
            mPoint[0] = v0;
            mPoint[1] = v1;
            mPoint[2] = v2;
        }
        // Constructor with value only
        TemplateCubicBezier(const T& v0) 
        {
            mPoint[0] = v0;
            mPoint[1] = v0;
            mPoint[2] = v0;
        }

        TemplateCubicBezier() {}

        const T& getPosition() const { return mPoint[0];}
        const T& getTangentPoint1() const { return mPoint[1];}
        const T& getTangentPoint2() const { return mPoint[2];}
        
        // steaming operators.
        friend std::ostream& operator << (std::ostream& output, const TemplateCubicBezier<T>& vec)
        {
            output << vec.mPoint[0] << " "
                   << vec.mPoint[1] << " "
                   << vec.mPoint[2];
            return output; // to enable cascading
        }

        friend std::istream& operator >> (std::istream& input, TemplateCubicBezier<T>& vec)
        {
            input >> vec.mPoint[0] >> vec.mPoint[1] >> vec.mPoint[2];
            return input;
        }
    };


    typedef TemplateCubicBezier<float> FloatCubicBezier;
    typedef TemplateCubicBezier<double> DoubleCubicBezier;
    typedef TemplateCubicBezier<osg::Vec2> Vec2CubicBezier;
    typedef TemplateCubicBezier<osg::Vec3> Vec3CubicBezier;
    typedef TemplateCubicBezier<osg::Vec4> Vec4CubicBezier;

}

#endif