libopenscenegraph-3.4-dev 3.4.0+dfsg1-4+b3 / usr / include / osgAnimation / Sampler

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/*  -*-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.
 *
 * Authors:
 *         Cedric Pinson <cedric.pinson@plopbyte.net>
 *         Michael Platings <mplatings@pixelpower.com>
 */

#ifndef OSGANIMATION_SAMPLER
#define OSGANIMATION_SAMPLER 1

#include <vector>
#include <iostream>
#include <osg/Referenced>
#include <osg/ref_ptr>
#include <osgAnimation/Keyframe>
#include <osgAnimation/Interpolator>

namespace osgAnimation
{

    class Sampler : public osg::Referenced
    {
    public:
        virtual KeyframeContainer* getKeyframeContainer() = 0;
        virtual const KeyframeContainer* getKeyframeContainer() const = 0;
    protected:
    };

    // Sampler generic
    template <class F>
    class TemplateSampler : public Sampler
    {
    public:
        typedef typename F::KeyframeType KeyframeType;
        typedef TemplateKeyframeContainer<KeyframeType> KeyframeContainerType;
        typedef typename F::UsingType UsingType;
        typedef F FunctorType;

        TemplateSampler() {}
        ~TemplateSampler() {}

        void getValueAt(double time, UsingType& result) const { _functor.getValue(*_keyframes, time, result);}
        void setKeyframeContainer(KeyframeContainerType* kf) { _keyframes = kf;}

        virtual KeyframeContainer* getKeyframeContainer() { return _keyframes.get(); }
        virtual const KeyframeContainer* getKeyframeContainer() const { return _keyframes.get();}

        KeyframeContainerType* getKeyframeContainerTyped() { return _keyframes.get();}
        const KeyframeContainerType* getKeyframeContainerTyped() const { return _keyframes.get();}
        KeyframeContainerType* getOrCreateKeyframeContainer()
        {
            if (_keyframes != 0)
                return _keyframes.get();
            _keyframes = new KeyframeContainerType;
            return _keyframes.get();
        }

        double getStartTime() const
        {
            if (!_keyframes || _keyframes->empty())
                return 0.0;
            return _keyframes->front().getTime();
        }

        double getEndTime() const
        {
            if (!_keyframes || _keyframes->empty())
                return 0.0;
            return _keyframes->back().getTime();
        }

    protected:

        FunctorType _functor;
        osg::ref_ptr<KeyframeContainerType> _keyframes;
    };


    template<typename VALUESAMPLERTYPE, typename TIMESAMPLERTYPE>
    class TemplateCompositeSampler : public osg::Referenced
    {
        VALUESAMPLERTYPE& _value;
        TIMESAMPLERTYPE& _time;

    public:
        typedef typename VALUESAMPLERTYPE::FunctorType::UsingType UsingType;
        typedef typename VALUESAMPLERTYPE::FunctorType::KeyframeType KeyframeType;

        TemplateCompositeSampler(VALUESAMPLERTYPE& value, TIMESAMPLERTYPE& time) : _value(value), _time(time)
        {
        }

        void getValueAt(double time, typename VALUESAMPLERTYPE::FunctorType::UsingType& result)
        {
            double newtime;
            _time.getValueAt(time, newtime);
            _value.getValueAt(newtime, result);
        }
        float getStartTime() const {return _time.getStartTime(); }
        float getEndTime() const {return _time.getEndTime();}
    };


    typedef TemplateSampler<DoubleStepInterpolator> DoubleStepSampler;
    typedef TemplateSampler<FloatStepInterpolator> FloatStepSampler;
    typedef TemplateSampler<Vec2StepInterpolator> Vec2StepSampler;
    typedef TemplateSampler<Vec3StepInterpolator> Vec3StepSampler;
    typedef TemplateSampler<Vec4StepInterpolator> Vec4StepSampler;
    typedef TemplateSampler<QuatStepInterpolator> QuatStepSampler;

    typedef TemplateSampler<DoubleLinearInterpolator> DoubleLinearSampler;
    typedef TemplateSampler<FloatLinearInterpolator> FloatLinearSampler;
    typedef TemplateSampler<Vec2LinearInterpolator> Vec2LinearSampler;
    typedef TemplateSampler<Vec3LinearInterpolator> Vec3LinearSampler;
    typedef TemplateSampler<Vec4LinearInterpolator> Vec4LinearSampler;
    typedef TemplateSampler<QuatSphericalLinearInterpolator> QuatSphericalLinearSampler;
    typedef TemplateSampler<MatrixLinearInterpolator> MatrixLinearSampler;

    typedef TemplateSampler<FloatCubicBezierInterpolator> FloatCubicBezierSampler;
    typedef TemplateSampler<DoubleCubicBezierInterpolator> DoubleCubicBezierSampler;
    typedef TemplateSampler<Vec2CubicBezierInterpolator> Vec2CubicBezierSampler;
    typedef TemplateSampler<Vec3CubicBezierInterpolator> Vec3CubicBezierSampler;
    typedef TemplateSampler<Vec4CubicBezierInterpolator> Vec4CubicBezierSampler;

}

#endif

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