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144 lines
4.2 KiB
144 lines
4.2 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_SEGMENT_PLACER |
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#define OSGPARTICLE_SEGMENT_PLACER 1 |
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#include <osgParticle/Placer> |
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#include <osgParticle/Particle> |
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#include <osg/CopyOp> |
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#include <osg/Object> |
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#include <osg/Vec3> |
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namespace osgParticle { |
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/** A segment-shaped particle placer. |
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To use this placer you have to define a segment, by setting its two vertices (<B>A</B> and <B>B</B>); |
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when an emitter requests a <CODE>SegmentPlacer</CODE> to place a particle, the position is chosen randomly |
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within that segment. |
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*/ |
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class SegmentPlacer: public Placer { |
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public: |
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inline SegmentPlacer(); |
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inline SegmentPlacer(const SegmentPlacer& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY); |
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META_Object(osgParticle, SegmentPlacer); |
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/// get vertex <B>A</B>. |
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inline const osg::Vec3& getVertexA() const; |
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/// Set vertex <B>A</B> of the segment as a vector. |
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inline void setVertexA(const osg::Vec3& v); |
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/// Set vertex <B>A</B> of the segment as three floats. |
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inline void setVertexA(float x, float y, float z); |
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/// get vertex <B>B</B>. |
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inline const osg::Vec3& getVertexB() const; |
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/// Set vertex <B>B</B> of the segment as a vector. |
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inline void setVertexB(const osg::Vec3& v); |
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/// Set vertex <B>B</B> of the segment as three floats. |
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inline void setVertexB(float x, float y, float z); |
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/// Set both vertices. |
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inline void setSegment(const osg::Vec3& A, const osg::Vec3& B); |
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/// Place a particle. This method is called by <CODE>ModularEmitter</CODE>, do not call it manually. |
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inline void place(Particle* P) const; |
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/// return the length of the segment |
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inline float volume() const; |
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/// return the control position |
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inline osg::Vec3 getControlPosition() const; |
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protected: |
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virtual ~SegmentPlacer() {} |
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SegmentPlacer& operator=(const SegmentPlacer&) { return *this; } |
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private: |
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osg::Vec3 _vertexA; |
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osg::Vec3 _vertexB; |
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}; |
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// INLINE FUNCTIONS |
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inline SegmentPlacer::SegmentPlacer() |
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: Placer(), _vertexA(-1, 0, 0), _vertexB(1, 0, 0) |
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{ |
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} |
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inline SegmentPlacer::SegmentPlacer(const SegmentPlacer& copy, const osg::CopyOp& copyop) |
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: Placer(copy, copyop), _vertexA(copy._vertexA), _vertexB(copy._vertexB) |
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{ |
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} |
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inline const osg::Vec3& SegmentPlacer::getVertexA() const |
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{ |
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return _vertexA; |
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} |
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inline const osg::Vec3& SegmentPlacer::getVertexB() const |
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{ |
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return _vertexB; |
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} |
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inline void SegmentPlacer::setSegment(const osg::Vec3& A, const osg::Vec3& B) |
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{ |
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_vertexA = A; |
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_vertexB = B; |
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} |
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inline void SegmentPlacer::place(Particle* P) const |
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{ |
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P->setPosition(rangev3(_vertexA, _vertexB).get_random()); |
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} |
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inline float SegmentPlacer::volume() const |
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{ |
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return (_vertexB - _vertexA).length(); |
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} |
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inline void SegmentPlacer::setVertexA(const osg::Vec3& v) |
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{ |
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_vertexA = v; |
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} |
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inline void SegmentPlacer::setVertexA(float x, float y, float z) |
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{ |
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_vertexA.set(x, y, z); |
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} |
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inline void SegmentPlacer::setVertexB(const osg::Vec3& v) |
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{ |
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_vertexB = v; |
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} |
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inline void SegmentPlacer::setVertexB(float x, float y, float z) |
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{ |
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_vertexB.set(x, y, z); |
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} |
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inline osg::Vec3 SegmentPlacer::getControlPosition() const |
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{ |
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return (_vertexA+_vertexB)*0.5f; |
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} |
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} |
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#endif
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