[692] | 1 | /*
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| 2 | -----------------------------------------------------------------------------
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| 3 | This source file is part of OGRE
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| 4 | (Object-oriented Graphics Rendering Engine)
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| 5 | For the latest info, see http://www.ogre3d.org/
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| 6 |
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| 7 | Copyright (c) 2000-2005 The OGRE Team
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| 8 | Also see acknowledgements in Readme.html
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| 9 |
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| 10 | This program is free software; you can redistribute it and/or modify it under
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software
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| 12 | Foundation; either version 2 of the License, or (at your option) any later
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| 13 | version.
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| 14 |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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| 18 |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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| 22 | http://www.gnu.org/copyleft/lesser.txt.
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| 23 | -----------------------------------------------------------------------------
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| 24 | */
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| 25 | #ifndef __DirectionRandomiserAffector_H__
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| 26 | #define __DirectionRandomiserAffector_H__
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| 27 |
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| 28 | #include "OgreParticleFXPrerequisites.h"
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| 29 | #include "OgreParticleAffector.h"
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| 30 | #include "OgreVector3.h"
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| 31 |
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| 32 |
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| 33 | namespace Ogre {
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| 34 |
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| 35 | /** This class defines a ParticleAffector which applies randomness to the movement of the particles.
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| 36 | @remarks
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| 37 | This affector (see ParticleAffector) applies randomness to the movement of the particles by
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| 38 | changing the direction vectors.
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| 39 | @par
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| 40 | The most important parameter to control the effect is randomness. It controls the range in which changes
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| 41 | are applied to each axis of the direction vector.
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| 42 | The parameter scope can be used to limit the effect to a certain percentage of the particles.
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| 43 | */
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| 44 | class _OgreParticleFXExport DirectionRandomiserAffector : public ParticleAffector
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| 45 | {
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| 46 | public:
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| 47 | /** Command object for randomness (see ParamCommand).*/
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| 48 | class CmdRandomness : public ParamCommand
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| 49 | {
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| 50 | public:
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| 51 | String doGet(const void* target) const;
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| 52 | void doSet(void* target, const String& val);
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| 53 | };
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| 54 |
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| 55 | /** Command object for scope (see ParamCommand).*/
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| 56 | class CmdScope : public ParamCommand
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| 57 | {
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| 58 | public:
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| 59 | String doGet(const void* target) const;
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| 60 | void doSet(void* target, const String& val);
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| 61 | };
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| 62 |
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| 63 | /** Command object for keep_velocity (see ParamCommand).*/
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| 64 | class CmdKeepVelocity : public ParamCommand
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| 65 | {
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| 66 | public:
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| 67 | String doGet(const void* target) const;
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| 68 | void doSet(void* target, const String& val);
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| 69 | };
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| 70 |
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| 71 | /// Default constructor
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| 72 | DirectionRandomiserAffector(ParticleSystem* psys);
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| 73 |
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| 74 | /** See ParticleAffector. */
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| 75 | void _affectParticles(ParticleSystem* pSystem, Real timeElapsed);
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| 76 |
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| 77 |
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| 78 | /** Sets the randomness to apply to the particles in a system. */
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| 79 | void setRandomness(Real force);
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| 80 | /** Sets the scope (percentage of particles which are randomised). */
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| 81 | void setScope(Real force);
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| 82 | /** Set flag which detemines whether particle speed is changed. */
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| 83 | void setKeepVelocity(bool keepVelocity);
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| 84 |
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| 85 | /** Gets the randomness to apply to the particles in a system. */
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| 86 | Real getRandomness(void) const;
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| 87 | /** Gets the scope (percentage of particles which are randomised). */
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| 88 | Real getScope(void) const;
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| 89 | /** Gets flag which detemines whether particle speed is changed. */
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| 90 | bool getKeepVelocity(void) const;
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| 91 |
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| 92 | /// Command objects
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| 93 | static CmdRandomness msRandomnessCmd;
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| 94 | static CmdScope msScopeCmd;
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| 95 | static CmdKeepVelocity msKeepVelocityCmd;
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| 96 |
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| 97 | protected:
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| 98 | Real mRandomness;
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| 99 | Real mScope;
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| 100 | bool mKeepVelocity;
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| 101 |
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| 102 | };
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| 103 |
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| 104 | }
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| 105 |
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| 106 | #endif
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