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87 lines
3.2 KiB
87 lines
3.2 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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* |
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* This library is open source and may be redistributed and/or modified under |
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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* (at your option) any later version. The full license is in LICENSE file |
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* included with this distribution, and on the openscenegraph.org website. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* OpenSceneGraph Public License for more details. |
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*/ |
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//osgParticle - Copyright (C) 2002 Marco Jez |
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#ifndef OSGPARTICLE_INTERPOLATOR |
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#define OSGPARTICLE_INTERPOLATOR |
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#include <osgParticle/range> |
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#include <osg/CopyOp> |
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#include <osg/Object> |
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#include <osg/Vec2> |
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#include <osg/Vec3> |
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#include <osg/Vec4> |
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namespace osgParticle |
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{ |
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/// An abstract base class for implementing interpolators. |
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class Interpolator : public osg::Object { |
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public: |
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Interpolator() |
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: osg::Object() {} |
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Interpolator(const Interpolator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) |
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: osg::Object(copy, copyop) {} |
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virtual const char* libraryName() const { return "osgParticle"; } |
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virtual const char* className() const { return "Interpolator"; } |
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const Interpolator* >(obj) != 0; } |
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/// Interpolate between floats. Must be overriden in descendant classes. |
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virtual float interpolate(float t, float y1, float y2) const = 0; |
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/// Interpolate between 2-dimensional vectors. Default behavior is to interpolate each component separately. |
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virtual osg::Vec2 interpolate(float t, const osg::Vec2& y1, const osg::Vec2& y2) const |
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{ |
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return osg::Vec2( |
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interpolate(t, y1.x(), y2.x()), |
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interpolate(t, y1.y(), y2.y()) |
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); |
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} |
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/// Interpolate between 3-dimensional vectors. Default behavior is to interpolate each component separately. |
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virtual osg::Vec3 interpolate(float t, const osg::Vec3& y1, const osg::Vec3& y2) const |
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{ |
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return osg::Vec3( |
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interpolate(t, y1.x(), y2.x()), |
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interpolate(t, y1.y(), y2.y()), |
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interpolate(t, y1.z(), y2.z()) |
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); |
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} |
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/// Interpolate between 4-dimensional vectors. Default behavior is to interpolate each component separately. |
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virtual osg::Vec4 interpolate(float t, const osg::Vec4& y1, const osg::Vec4& y2) const |
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{ |
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return osg::Vec4( |
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interpolate(t, y1.x(), y2.x()), |
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interpolate(t, y1.y(), y2.y()), |
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interpolate(t, y1.z(), y2.z()), |
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interpolate(t, y1.w(), y2.w()) |
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); |
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} |
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template<class ValueType> |
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ValueType interpolate(float t, const range<ValueType>& r) const |
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{ |
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return interpolate(t, r.minimum, r.maximum); |
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} |
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protected: |
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virtual ~Interpolator() {} |
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}; |
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} |
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#endif
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