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) 2000-2006 Torus Knot Software Ltd |
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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 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #include "OgreDeflectorPlaneAffector.h" |
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30 | #include "OgreParticleSystem.h" |
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31 | #include "OgreParticle.h" |
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32 | #include "OgreStringConverter.h" |
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33 | |
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34 | |
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35 | namespace Ogre { |
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36 | |
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37 | // Instantiate statics |
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38 | DeflectorPlaneAffector::CmdPlanePoint DeflectorPlaneAffector::msPlanePointCmd; |
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39 | DeflectorPlaneAffector::CmdPlaneNormal DeflectorPlaneAffector::msPlaneNormalCmd; |
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40 | DeflectorPlaneAffector::CmdBounce DeflectorPlaneAffector::msBounceCmd; |
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41 | |
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42 | //----------------------------------------------------------------------- |
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43 | DeflectorPlaneAffector::DeflectorPlaneAffector(ParticleSystem* psys) |
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44 | : ParticleAffector(psys) |
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45 | { |
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46 | mType = "DeflectorPlane"; |
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47 | |
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48 | // defaults |
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49 | mPlanePoint = Vector3::ZERO; |
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50 | mPlaneNormal = Vector3::UNIT_Y; |
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51 | mBounce = 1.0; |
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52 | |
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53 | // Set up parameters |
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54 | if (createParamDictionary("DeflectorPlaneAffector")) |
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55 | { |
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56 | addBaseParameters(); |
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57 | // Add extra paramaters |
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58 | ParamDictionary* dict = getParamDictionary(); |
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59 | dict->addParameter(ParameterDef("plane_point", |
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60 | "A point on the deflector plane. Together with the normal vector it defines the plane.", |
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61 | PT_VECTOR3), &msPlanePointCmd); |
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62 | dict->addParameter(ParameterDef("plane_normal", |
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63 | "The normal vector of the deflector plane. Together with the point it defines the plane.", |
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64 | PT_VECTOR3), &msPlaneNormalCmd); |
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65 | dict->addParameter(ParameterDef("bounce", |
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66 | "The amount of bouncing when a particle is deflected. 0 means no deflection and 1 stands for 100 percent reflection.", |
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67 | PT_REAL), &msBounceCmd); |
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68 | } |
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69 | } |
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70 | //----------------------------------------------------------------------- |
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71 | void DeflectorPlaneAffector::_affectParticles(ParticleSystem* pSystem, Real timeElapsed) |
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72 | { |
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73 | // precalculate distance of plane from origin |
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74 | Real planeDistance = - mPlaneNormal.dotProduct(mPlanePoint) / Math::Sqrt(mPlaneNormal.dotProduct(mPlaneNormal)); |
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75 | Vector3 directionPart; |
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76 | |
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77 | ParticleIterator pi = pSystem->_getIterator(); |
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78 | Particle *p; |
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79 | |
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80 | while (!pi.end()) |
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81 | { |
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82 | p = pi.getNext(); |
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83 | |
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84 | Vector3 direction(p->direction * timeElapsed); |
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85 | if (mPlaneNormal.dotProduct(p->position + direction) + planeDistance <= 0.0) |
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86 | { |
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87 | Real a = mPlaneNormal.dotProduct(p->position) + planeDistance; |
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88 | if (a > 0.0) |
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89 | { |
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90 | // for intersection point |
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91 | directionPart = direction * (- a / direction.dotProduct( mPlaneNormal )); |
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92 | // set new position |
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93 | p->position = (p->position + ( directionPart )) + (((directionPart) - direction) * mBounce); |
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94 | |
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95 | // reflect direction vector |
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96 | p->direction = (p->direction - (2.0 * p->direction.dotProduct( mPlaneNormal ) * mPlaneNormal)) * mBounce; |
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97 | } |
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98 | } |
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99 | } |
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100 | } |
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101 | //----------------------------------------------------------------------- |
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102 | void DeflectorPlaneAffector::setPlanePoint(const Vector3& pos) |
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103 | { |
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104 | mPlanePoint = pos; |
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105 | } |
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106 | //----------------------------------------------------------------------- |
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107 | void DeflectorPlaneAffector::setPlaneNormal(const Vector3& normal) |
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108 | { |
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109 | mPlaneNormal = normal; |
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110 | } |
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111 | //----------------------------------------------------------------------- |
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112 | void DeflectorPlaneAffector::setBounce(Real bounce) |
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113 | { |
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114 | mBounce = bounce; |
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115 | } |
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116 | |
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117 | //----------------------------------------------------------------------- |
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118 | Vector3 DeflectorPlaneAffector::getPlanePoint(void) const |
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119 | { |
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120 | return mPlanePoint; |
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121 | } |
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122 | //----------------------------------------------------------------------- |
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123 | Vector3 DeflectorPlaneAffector::getPlaneNormal(void) const |
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124 | { |
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125 | return mPlaneNormal; |
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126 | } |
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127 | //----------------------------------------------------------------------- |
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128 | Real DeflectorPlaneAffector::getBounce(void) const |
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129 | { |
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130 | return mBounce; |
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131 | } |
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132 | |
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133 | //----------------------------------------------------------------------- |
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134 | //----------------------------------------------------------------------- |
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135 | // Command objects |
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136 | //----------------------------------------------------------------------- |
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137 | //----------------------------------------------------------------------- |
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138 | String DeflectorPlaneAffector::CmdPlanePoint::doGet(const void* target) const |
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139 | { |
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140 | return StringConverter::toString( |
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141 | static_cast<const DeflectorPlaneAffector*>(target)->getPlanePoint() ); |
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142 | } |
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143 | void DeflectorPlaneAffector::CmdPlanePoint::doSet(void* target, const String& val) |
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144 | { |
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145 | static_cast<DeflectorPlaneAffector*>(target)->setPlanePoint( |
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146 | StringConverter::parseVector3(val)); |
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147 | } |
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148 | //----------------------------------------------------------------------- |
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149 | String DeflectorPlaneAffector::CmdPlaneNormal::doGet(const void* target) const |
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150 | { |
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151 | return StringConverter::toString( |
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152 | static_cast<const DeflectorPlaneAffector*>(target)->getPlaneNormal() ); |
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153 | } |
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154 | void DeflectorPlaneAffector::CmdPlaneNormal::doSet(void* target, const String& val) |
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155 | { |
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156 | static_cast<DeflectorPlaneAffector*>(target)->setPlaneNormal( |
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157 | StringConverter::parseVector3(val)); |
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158 | } |
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159 | //----------------------------------------------------------------------- |
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160 | String DeflectorPlaneAffector::CmdBounce::doGet(const void* target) const |
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161 | { |
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162 | return StringConverter::toString( |
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163 | static_cast<const DeflectorPlaneAffector*>(target)->getBounce() ); |
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164 | |
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165 | } |
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166 | void DeflectorPlaneAffector::CmdBounce::doSet(void* target, const String& val) |
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167 | { |
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168 | static_cast<DeflectorPlaneAffector*>(target)->setBounce( |
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169 | StringConverter::parseReal(val)); |
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170 | } |
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171 | |
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172 | } |
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