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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_MULTISEGMENT_PLACER |
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#define OSGPARTICLE_MULTISEGMENT_PLACER 1 |
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#include <osgParticle/Export> |
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#include <osgParticle/Placer> |
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#include <osgParticle/Particle> |
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#include <vector> |
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#include <utility> |
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#include <osg/Notify> |
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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 polyline-shaped particle placer. |
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This placer class sets the position of incoming particles by choosing a random point on the |
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specified sequence of connected segments. |
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*/ |
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class OSGPARTICLE_EXPORT MultiSegmentPlacer: public Placer { |
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public: |
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MultiSegmentPlacer(); |
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MultiSegmentPlacer(const MultiSegmentPlacer& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY); |
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META_Object(osgParticle, MultiSegmentPlacer); |
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/// Get the number of vertices which define the segments. |
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inline int numVertices() const; |
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/// Get a vertex. |
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inline const osg::Vec3& getVertex(int i) const; |
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/// Set a vertex. |
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inline void setVertex(int i, const osg::Vec3& v); |
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/// Set a vertex. |
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inline void setVertex(int i, float x, float y, float z); |
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/// Add a vertex. |
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inline void addVertex(const osg::Vec3& v); |
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/// Add a vertex. |
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inline void addVertex(float x, float y, float z); |
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/// Remove a vertex. |
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inline void removeVertex(int i); |
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/// Place a partice. Called automatically by <CODE>ModularEmitter</CODE>, do not call this method manually. |
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void place(Particle* P) const; |
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/// return the length of the multi-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 ~MultiSegmentPlacer() {} |
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MultiSegmentPlacer& operator=(const MultiSegmentPlacer&) { return *this; } |
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private: |
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typedef std::pair<osg::Vec3, float> Vertex_data; |
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typedef std::vector<Vertex_data> Vertex_vector; |
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Vertex_vector _vx; |
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float _total_length; |
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void recompute_length(); |
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}; |
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// INLINE FUNCTIONS |
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inline int MultiSegmentPlacer::numVertices() const |
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{ |
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return static_cast<int>(_vx.size()); |
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} |
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inline const osg::Vec3& MultiSegmentPlacer::getVertex(int i) const |
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{ |
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return _vx[i].first; |
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} |
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inline void MultiSegmentPlacer::setVertex(int i, const osg::Vec3& v) |
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{ |
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_vx[i].first = v; |
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recompute_length(); |
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} |
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inline void MultiSegmentPlacer::setVertex(int i, float x, float y, float z) |
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{ |
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_vx[i].first.set(x, y, z); |
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recompute_length(); |
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} |
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inline void MultiSegmentPlacer::addVertex(const osg::Vec3& v) |
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{ |
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float l = 0; |
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if (_vx.size() > 0) { |
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l = (v - _vx.back().first).length(); |
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} |
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_total_length += l; |
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_vx.push_back(std::make_pair(v, _total_length)); |
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} |
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inline void MultiSegmentPlacer::addVertex(float x, float y, float z) |
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{ |
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addVertex(osg::Vec3(x, y, z)); |
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} |
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inline void MultiSegmentPlacer::removeVertex(int i) |
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{ |
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_vx.erase(_vx.begin()+i); |
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recompute_length(); |
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} |
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inline float MultiSegmentPlacer::volume() const |
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{ |
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return _total_length; |
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} |
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inline osg::Vec3 MultiSegmentPlacer::getControlPosition() const |
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{ |
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return _vx.empty() ? osg::Vec3(0.0f,0.0f,0.0f) : _vx[0].first; |
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} |
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} |
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#endif
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