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108 lines
3.1 KiB
108 lines
3.1 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_ACCELOPERATOR |
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#define OSGPARTICLE_ACCELOPERATOR 1 |
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#include <osgParticle/ModularProgram> |
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#include <osgParticle/Operator> |
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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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{ |
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/** An operator class that applies a constant acceleration to the particles. |
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*/ |
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class AccelOperator: public Operator { |
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public: |
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inline AccelOperator(); |
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inline AccelOperator(const AccelOperator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY); |
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META_Object(osgParticle, AccelOperator); |
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/// Get the acceleration vector. |
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inline const osg::Vec3& getAcceleration() const; |
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/// Set the acceleration vector. |
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inline void setAcceleration(const osg::Vec3& v); |
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/** Quickly set the acceleration vector to the gravity on earth (0, 0, -9.81). |
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The acceleration will be multiplied by the <CODE>scale</CODE> parameter. |
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*/ |
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inline void setToGravity(float scale = 1); |
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/// Apply the acceleration to a particle. Do not call this method manually. |
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inline void operate(Particle* P, double dt); |
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/// Perform some initializations. Do not call this method manually. |
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inline void beginOperate(Program *prg); |
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protected: |
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virtual ~AccelOperator() {} |
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AccelOperator &operator=(const AccelOperator &) { return *this; } |
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private: |
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osg::Vec3 _accel; |
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osg::Vec3 _xf_accel; |
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}; |
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// INLINE FUNCTIONS |
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inline AccelOperator::AccelOperator() |
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: Operator(), _accel(0, 0, 0) |
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{ |
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} |
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inline AccelOperator::AccelOperator(const AccelOperator& copy, const osg::CopyOp& copyop) |
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: Operator(copy, copyop), _accel(copy._accel) |
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{ |
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} |
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inline const osg::Vec3& AccelOperator::getAcceleration() const |
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{ |
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return _accel; |
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} |
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inline void AccelOperator::setAcceleration(const osg::Vec3& v) |
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{ |
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_accel = v; |
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} |
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inline void AccelOperator::setToGravity(float scale) |
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{ |
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_accel.set(0, 0, -9.80665f * scale); |
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} |
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inline void AccelOperator::operate(Particle* P, double dt) |
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{ |
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P->addVelocity(_xf_accel * dt); |
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} |
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inline void AccelOperator::beginOperate(Program *prg) |
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{ |
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if (prg->getReferenceFrame() == ModularProgram::RELATIVE_RF) { |
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_xf_accel = prg->rotateLocalToWorld(_accel); |
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} else { |
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_xf_accel = _accel; |
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} |
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} |
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} |
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#endif
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