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panda/src/particlesystem/ringEmitter.h

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// Filename: ringEmitter.h
// Created by:  charles (22Jun00)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef RINGEMITTER_H
#define RINGEMITTER_H

#include "baseParticleEmitter.h"

////////////////////////////////////////////////////////////////////
//       Class : RingEmitter
// Description : Describes a planar ring region in which
//               particles are generated.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDAPHYSICS RingEmitter : public BaseParticleEmitter {
private:
  float _radius;

  // CUSTOM EMISSION PARAMETERS
  float _aoe;  // angle of elevation

  ///////////////////////////////
  // scratch variables that carry over from position calc to velocity calc
  float _sin_theta;
  float _cos_theta;
  ///////////////////////////////

  virtual void assign_initial_position(LPoint3f& pos);
  virtual void assign_initial_velocity(LVector3f& vel);

PUBLISHED:
  RingEmitter(void);
  RingEmitter(const RingEmitter &copy);
  virtual ~RingEmitter(void);

  virtual BaseParticleEmitter *make_copy(void);

  INLINE void set_radius(float r);
  INLINE void set_angle(float angle);

  INLINE float get_radius(void) const;
  INLINE float get_angle(void) const;
};

#include "ringEmitter.I"

#endif // RINGEMITTER_H

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