157 lines
4.6 KiB
Plaintext
157 lines
4.6 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_RADIALSHOOTER_
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#define OSGPARTICLE_RADIALSHOOTER_ 1
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#include <osgParticle/Shooter>
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#include <osgParticle/Particle>
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#include <osgParticle/range>
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#include <osg/CopyOp>
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#include <osg/Object>
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#include <osg/Math>
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namespace osgParticle
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{
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/** A shooter class that shoots particles radially.
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This shooter computes the velocity vector of incoming particles by choosing a
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random direction and a random speed. Both direction and speed are chosen within
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specified ranges. The direction is defined by two angles: <B>theta</B>, which
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is the angle between the velocity vector and the Z axis, and <B>phi</B>, which is
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the angle between the X axis and the velocity vector projected onto the X-Y plane.
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*/
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class RadialShooter: public Shooter {
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public:
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inline RadialShooter();
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inline RadialShooter(const RadialShooter ©, const osg::CopyOp ©op = osg::CopyOp::SHALLOW_COPY);
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META_Object(osgParticle, RadialShooter);
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/// Get the range of possible values for <B>theta</B> angle.
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inline const rangef &getThetaRange() const;
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/// Set the range of possible values for <B>theta</B> angle.
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inline void setThetaRange(const rangef &r);
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/// Set the range of possible values for <B>theta</B> angle.
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inline void setThetaRange(float r1, float r2);
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/// Get the range of possible values for <B>phi</B> angle.
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inline const rangef &getPhiRange() const;
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/// Set the range of possible values for <B>phi</B> angle.
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inline void setPhiRange(const rangef &r);
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/// Set the range of possible values for <B>phi</B> angle.
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inline void setPhiRange(float r1, float r2);
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/// Get the range of possible values for initial speed of particles.
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inline const rangef &getInitialSpeedRange() const;
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/// Set the range of possible values for initial speed of particles.
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inline void setInitialSpeedRange(const rangef &r);
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/// Set the range of possible values for initial speed of particles.
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inline void setInitialSpeedRange(float r1, float r2);
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/// Shoot a particle. Do not call this method manually.
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inline void shoot(Particle *P) const;
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protected:
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virtual ~RadialShooter() {}
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RadialShooter &operator=(const RadialShooter &) { return *this; }
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private:
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rangef theta_range_;
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rangef phi_range_;
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rangef speed_range_;
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};
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// INLINE FUNCTIONS
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inline RadialShooter::RadialShooter()
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: Shooter(),
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theta_range_(0, 0.5f*osg::PI_4),
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phi_range_(0, 2*osg::PI),
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speed_range_(10, 10)
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{
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}
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inline RadialShooter::RadialShooter(const RadialShooter ©, const osg::CopyOp ©op)
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: Shooter(copy, copyop),
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theta_range_(copy.theta_range_),
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phi_range_(copy.phi_range_),
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speed_range_(copy.speed_range_)
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{
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}
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inline const rangef &RadialShooter::getThetaRange() const
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{
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return theta_range_;
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}
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inline const rangef &RadialShooter::getPhiRange() const
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{
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return phi_range_;
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}
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inline const rangef &RadialShooter::getInitialSpeedRange() const
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{
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return speed_range_;
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}
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inline void RadialShooter::setThetaRange(const rangef &r)
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{
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theta_range_ = r;
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}
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inline void RadialShooter::setThetaRange(float r1, float r2)
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{
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theta_range_.min = r1;
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theta_range_.max = r2;
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}
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inline void RadialShooter::setPhiRange(const rangef &r)
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{
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phi_range_ = r;
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}
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inline void RadialShooter::setPhiRange(float r1, float r2)
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{
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phi_range_.min = r1;
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phi_range_.max = r2;
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}
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inline void RadialShooter::setInitialSpeedRange(const rangef &r)
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{
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speed_range_ = r;
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}
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inline void RadialShooter::setInitialSpeedRange(float r1, float r2)
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{
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speed_range_.min = r1;
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speed_range_.max = r2;
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}
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inline void RadialShooter::shoot(Particle *P) const
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{
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float theta = theta_range_.get_random();
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float phi = phi_range_.get_random();
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float speed = speed_range_.get_random();
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P->setVelocity(osg::Vec3(
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speed * sinf(theta) * cosf(phi),
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speed * sinf(theta) * sinf(phi),
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speed * cosf(theta)
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));
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}
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}
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#endif
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