[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 | #include "OgreDeflectorPlaneAffector.h"
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| 26 | #include "OgreParticleSystem.h"
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| 27 | #include "OgreParticle.h"
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| 28 | #include "OgreStringConverter.h"
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| 29 |
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| 30 |
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| 31 | namespace Ogre {
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| 32 |
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| 33 | // Instantiate statics
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| 34 | DeflectorPlaneAffector::CmdPlanePoint DeflectorPlaneAffector::msPlanePointCmd;
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| 35 | DeflectorPlaneAffector::CmdPlaneNormal DeflectorPlaneAffector::msPlaneNormalCmd;
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| 36 | DeflectorPlaneAffector::CmdBounce DeflectorPlaneAffector::msBounceCmd;
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| 37 |
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| 38 | //-----------------------------------------------------------------------
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| 39 | DeflectorPlaneAffector::DeflectorPlaneAffector(ParticleSystem* psys)
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| 40 | : ParticleAffector(psys)
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| 41 | {
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| 42 | mType = "DeflectorPlane";
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| 43 |
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| 44 | // defaults
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| 45 | mPlanePoint = Vector3::ZERO;
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| 46 | mPlaneNormal = Vector3::UNIT_Y;
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| 47 | mBounce = 1.0;
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| 48 |
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| 49 | // Set up parameters
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| 50 | if (createParamDictionary("DeflectorPlaneAffector"))
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| 51 | {
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| 52 | addBaseParameters();
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| 53 | // Add extra paramaters
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| 54 | ParamDictionary* dict = getParamDictionary();
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| 55 | dict->addParameter(ParameterDef("plane_point",
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| 56 | "A point on the deflector plane. Together with the normal vector it defines the plane.",
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| 57 | PT_VECTOR3), &msPlanePointCmd);
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| 58 | dict->addParameter(ParameterDef("plane_normal",
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| 59 | "The normal vector of the deflector plane. Together with the point it defines the plane.",
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| 60 | PT_VECTOR3), &msPlaneNormalCmd);
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| 61 | dict->addParameter(ParameterDef("bounce",
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| 62 | "The amount of bouncing when a particle is deflected. 0 means no deflection and 1 stands for 100 percent reflection.",
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| 63 | PT_REAL), &msBounceCmd);
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| 64 | }
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| 65 | }
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| 66 | //-----------------------------------------------------------------------
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| 67 | void DeflectorPlaneAffector::_affectParticles(ParticleSystem* pSystem, Real timeElapsed)
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| 68 | {
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| 69 | // precalculate distance of plane from origin
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| 70 | Real planeDistance = - mPlaneNormal.dotProduct(mPlanePoint) / Math::Sqrt(mPlaneNormal.dotProduct(mPlaneNormal));
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| 71 | Vector3 directionPart;
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| 72 |
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| 73 | ParticleIterator pi = pSystem->_getIterator();
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| 74 | Particle *p;
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| 75 |
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| 76 | while (!pi.end())
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| 77 | {
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| 78 | p = pi.getNext();
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| 79 |
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| 80 | Vector3 direction(p->direction * timeElapsed);
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| 81 | if (mPlaneNormal.dotProduct(p->position + direction) + planeDistance <= 0.0)
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| 82 | {
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| 83 | Real a = mPlaneNormal.dotProduct(p->position) + planeDistance;
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| 84 | if (a > 0.0)
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| 85 | {
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| 86 | // for intersection point
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| 87 | directionPart = direction * (- a / direction.dotProduct( mPlaneNormal ));
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| 88 | // set new position
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| 89 | p->position = (p->position + ( directionPart )) + (((directionPart) - direction) * mBounce);
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| 90 |
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| 91 | // reflect direction vector
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| 92 | p->direction = (p->direction - (2.0 * p->direction.dotProduct( mPlaneNormal ) * mPlaneNormal)) * mBounce;
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| 93 | }
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| 94 | }
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| 95 | }
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| 96 | }
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| 97 | //-----------------------------------------------------------------------
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| 98 | void DeflectorPlaneAffector::setPlanePoint(const Vector3& pos)
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| 99 | {
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| 100 | mPlanePoint = pos;
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| 101 | }
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| 102 | //-----------------------------------------------------------------------
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| 103 | void DeflectorPlaneAffector::setPlaneNormal(const Vector3& normal)
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| 104 | {
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| 105 | mPlaneNormal = normal;
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| 106 | }
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| 107 | //-----------------------------------------------------------------------
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| 108 | void DeflectorPlaneAffector::setBounce(Real bounce)
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| 109 | {
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| 110 | mBounce = bounce;
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| 111 | }
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| 112 |
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| 113 | //-----------------------------------------------------------------------
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| 114 | Vector3 DeflectorPlaneAffector::getPlanePoint(void) const
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| 115 | {
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| 116 | return mPlanePoint;
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| 117 | }
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| 118 | //-----------------------------------------------------------------------
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| 119 | Vector3 DeflectorPlaneAffector::getPlaneNormal(void) const
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| 120 | {
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| 121 | return mPlaneNormal;
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| 122 | }
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| 123 | //-----------------------------------------------------------------------
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| 124 | Real DeflectorPlaneAffector::getBounce(void) const
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| 125 | {
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| 126 | return mBounce;
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| 127 | }
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| 128 |
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| 129 | //-----------------------------------------------------------------------
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| 130 | //-----------------------------------------------------------------------
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| 131 | // Command objects
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| 132 | //-----------------------------------------------------------------------
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| 133 | //-----------------------------------------------------------------------
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| 134 | String DeflectorPlaneAffector::CmdPlanePoint::doGet(const void* target) const
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| 135 | {
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| 136 | return StringConverter::toString(
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| 137 | static_cast<const DeflectorPlaneAffector*>(target)->getPlanePoint() );
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| 138 | }
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| 139 | void DeflectorPlaneAffector::CmdPlanePoint::doSet(void* target, const String& val)
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| 140 | {
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| 141 | static_cast<DeflectorPlaneAffector*>(target)->setPlanePoint(
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| 142 | StringConverter::parseVector3(val));
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| 143 | }
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| 144 | //-----------------------------------------------------------------------
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| 145 | String DeflectorPlaneAffector::CmdPlaneNormal::doGet(const void* target) const
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| 146 | {
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| 147 | return StringConverter::toString(
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| 148 | static_cast<const DeflectorPlaneAffector*>(target)->getPlaneNormal() );
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| 149 | }
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| 150 | void DeflectorPlaneAffector::CmdPlaneNormal::doSet(void* target, const String& val)
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| 151 | {
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| 152 | static_cast<DeflectorPlaneAffector*>(target)->setPlaneNormal(
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| 153 | StringConverter::parseVector3(val));
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| 154 | }
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| 155 | //-----------------------------------------------------------------------
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| 156 | String DeflectorPlaneAffector::CmdBounce::doGet(const void* target) const
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| 157 | {
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| 158 | return StringConverter::toString(
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| 159 | static_cast<const DeflectorPlaneAffector*>(target)->getBounce() );
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| 160 |
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| 161 | }
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| 162 | void DeflectorPlaneAffector::CmdBounce::doSet(void* target, const String& val)
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| 163 | {
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| 164 | static_cast<DeflectorPlaneAffector*>(target)->setBounce(
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| 165 | StringConverter::parseReal(val));
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| 166 | }
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| 167 |
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| 168 | }
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