120 lines
3.3 KiB
Plaintext
120 lines
3.3 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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//osgParticle - Copyright (C) 2002 Marco Jez
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#ifndef OSGPARTICLE_MULTISEGMENTPLACER_
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#define OSGPARTICLE_MULTISEGMENTPLACER_ 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 ©, const osg::CopyOp ©op = 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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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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}
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#endif
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