101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 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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// Written by Wang Rui, (C) 2010
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#ifndef OSGPARTICLE_SINKOPERATOR
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#define OSGPARTICLE_SINKOPERATOR
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#include <osgParticle/Particle>
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#include <osgParticle/DomainOperator>
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namespace osgParticle
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{
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/** A sink operator kills particles if positions or velocities inside/outside the specified domain.
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Refer to David McAllister's Particle System API (http://www.particlesystems.org)
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*/
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class OSGPARTICLE_EXPORT SinkOperator : public DomainOperator
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{
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public:
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enum SinkTarget { SINK_POSITION, SINK_VELOCITY, SINK_ANGULAR_VELOCITY };
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enum SinkStrategy { SINK_INSIDE, SINK_OUTSIDE };
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SinkOperator()
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: DomainOperator(), _sinkTarget(SINK_POSITION), _sinkStrategy(SINK_INSIDE)
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{}
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SinkOperator( const SinkOperator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY )
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: DomainOperator(copy, copyop), _sinkTarget(copy._sinkTarget), _sinkStrategy(copy._sinkStrategy)
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{}
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META_Object( osgParticle, SinkOperator );
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/// Set the sink strategy
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void setSinkTarget( SinkTarget so ) { _sinkTarget = so; }
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/// Get the sink strategy
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SinkTarget getSinkTarget() const { return _sinkTarget; }
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/// Set the sink strategy
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void setSinkStrategy( SinkStrategy ss ) { _sinkStrategy = ss; }
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/// Get the sink strategy
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SinkStrategy getSinkStrategy() const { return _sinkStrategy; }
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/// Perform some initializations. Do not call this method manually.
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void beginOperate( Program* prg );
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protected:
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virtual ~SinkOperator() {}
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SinkOperator& operator=( const SinkOperator& ) { return *this; }
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virtual void handlePoint( const Domain& domain, Particle* P, double dt );
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virtual void handleLineSegment( const Domain& domain, Particle* P, double dt );
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virtual void handleTriangle( const Domain& domain, Particle* P, double dt );
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virtual void handleRectangle( const Domain& domain, Particle* P, double dt );
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virtual void handlePlane( const Domain& domain, Particle* P, double dt );
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virtual void handleSphere( const Domain& domain, Particle* P, double dt );
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virtual void handleBox( const Domain& domain, Particle* P, double dt );
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virtual void handleDisk( const Domain& domain, Particle* P, double dt );
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inline const osg::Vec3& getValue( Particle* P );
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inline void kill( Particle* P, bool insideDomain );
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SinkTarget _sinkTarget;
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SinkStrategy _sinkStrategy;
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};
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// INLINE METHODS
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inline const osg::Vec3& SinkOperator::getValue( Particle* P )
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{
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switch ( _sinkTarget )
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{
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case SINK_VELOCITY: return P->getVelocity();
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case SINK_ANGULAR_VELOCITY: return P->getAngularVelocity();
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case SINK_POSITION: default: return P->getPosition();
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}
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}
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inline void SinkOperator::kill( Particle* P, bool insideDomain )
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{
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if ( !((_sinkStrategy==SINK_INSIDE) ^ insideDomain) )
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P->kill();
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}
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}
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#endif
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