1 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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2 | * |
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3 | * This library is open source and may be redistributed and/or modified under |
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4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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5 | * (at your option) any later version. The full license is in LICENSE file |
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6 | * included with this distribution, and on the openscenegraph.org website. |
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7 | * |
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8 | * This library is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 | * OpenSceneGraph Public License for more details. |
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12 | */ |
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13 | //osgParticle - Copyright (C) 2002 Marco Jez |
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14 | |
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15 | #ifndef OSGPARTICLE_RADIAL_SHOOTER |
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16 | #define OSGPARTICLE_RADIAL_SHOOTER 1 |
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17 | |
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18 | #include <osgParticle/Shooter> |
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19 | #include <osgParticle/Particle> |
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20 | #include <osgParticle/range> |
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21 | |
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22 | #include <osg/CopyOp> |
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23 | #include <osg/Object> |
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24 | #include <osg/Math> |
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25 | |
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26 | namespace osgParticle |
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27 | { |
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28 | |
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29 | /** A shooter class that shoots particles radially. |
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30 | This shooter computes the velocity vector of incoming particles by choosing a |
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31 | random direction and a random speed. Both direction and speed are chosen within |
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32 | specified ranges. The direction is defined by two angles: <B>theta</B>, which |
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33 | is the angle between the velocity vector and the Z axis, and <B>phi</B>, which is |
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34 | the angle between the X axis and the velocity vector projected onto the X-Y plane. |
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35 | */ |
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36 | class RadialShooter: public Shooter { |
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37 | public: |
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38 | inline RadialShooter(); |
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39 | inline RadialShooter(const RadialShooter& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY); |
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40 | |
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41 | META_Object(osgParticle, RadialShooter); |
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42 | |
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43 | /// Get the range of possible values for <B>theta</B> angle. |
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44 | inline const rangef& getThetaRange() const; |
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45 | |
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46 | /// Set the range of possible values for <B>theta</B> angle. |
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47 | inline void setThetaRange(const rangef& r); |
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48 | |
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49 | /// Set the range of possible values for <B>theta</B> angle. |
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50 | inline void setThetaRange(float r1, float r2); |
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51 | |
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52 | /// Get the range of possible values for <B>phi</B> angle. |
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53 | inline const rangef& getPhiRange() const; |
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54 | |
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55 | /// Set the range of possible values for <B>phi</B> angle. |
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56 | inline void setPhiRange(const rangef& r); |
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57 | |
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58 | /// Set the range of possible values for <B>phi</B> angle. |
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59 | inline void setPhiRange(float r1, float r2); |
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60 | |
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61 | /// Get the range of possible values for initial speed of particles. |
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62 | inline const rangef& getInitialSpeedRange() const; |
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63 | |
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64 | /// Set the range of possible values for initial speed of particles. |
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65 | inline void setInitialSpeedRange(const rangef& r); |
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66 | |
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67 | /// Set the range of possible values for initial speed of particles. |
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68 | inline void setInitialSpeedRange(float r1, float r2); |
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69 | |
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70 | /// Get the range of possible values for initial rotational speed of particles. |
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71 | inline const rangev3& getInitialRotationalSpeedRange() const; |
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72 | |
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73 | /// Set the range of possible values for initial rotational speed of particles. |
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74 | inline void setInitialRotationalSpeedRange(const rangev3& r); |
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75 | |
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76 | /// Set the range of possible values for initial rotational speed of particles. |
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77 | inline void setInitialRotationalSpeedRange(const osg::Vec3& r1, const osg::Vec3& r2); |
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78 | |
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79 | /// Shoot a particle. Do not call this method manually. |
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80 | inline void shoot(Particle* P) const; |
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81 | |
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82 | protected: |
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83 | virtual ~RadialShooter() {} |
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84 | RadialShooter& operator=(const RadialShooter&) { return *this; } |
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85 | |
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86 | private: |
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87 | rangef _theta_range; |
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88 | rangef _phi_range; |
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89 | rangef _speed_range; |
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90 | rangev3 _rot_speed_range; |
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91 | }; |
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92 | |
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93 | // INLINE FUNCTIONS |
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94 | |
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95 | inline RadialShooter::RadialShooter() |
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96 | : Shooter(), |
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97 | _theta_range(0, 0.5f*osg::PI_4), |
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98 | _phi_range(0, 2*osg::PI), |
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99 | _speed_range(10, 10), |
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100 | _rot_speed_range(osg::Vec3(0,0,0), osg::Vec3(0,0,0)) |
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101 | { |
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102 | } |
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103 | |
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104 | inline RadialShooter::RadialShooter(const RadialShooter& copy, const osg::CopyOp& copyop) |
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105 | : Shooter(copy, copyop), |
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106 | _theta_range(copy._theta_range), |
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107 | _phi_range(copy._phi_range), |
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108 | _speed_range(copy._speed_range), |
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109 | _rot_speed_range(copy._rot_speed_range) |
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110 | { |
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111 | } |
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112 | |
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113 | inline const rangef& RadialShooter::getThetaRange() const |
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114 | { |
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115 | return _theta_range; |
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116 | } |
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117 | |
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118 | inline const rangef& RadialShooter::getPhiRange() const |
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119 | { |
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120 | return _phi_range; |
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121 | } |
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122 | |
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123 | inline const rangef& RadialShooter::getInitialSpeedRange() const |
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124 | { |
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125 | return _speed_range; |
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126 | } |
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127 | |
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128 | inline const rangev3& RadialShooter::getInitialRotationalSpeedRange() const |
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129 | { |
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130 | return _rot_speed_range; |
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131 | } |
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132 | |
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133 | inline void RadialShooter::setThetaRange(const rangef& r) |
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134 | { |
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135 | _theta_range = r; |
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136 | } |
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137 | |
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138 | inline void RadialShooter::setThetaRange(float r1, float r2) |
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139 | { |
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140 | _theta_range.minimum = r1; |
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141 | _theta_range.maximum = r2; |
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142 | } |
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143 | |
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144 | inline void RadialShooter::setPhiRange(const rangef& r) |
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145 | { |
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146 | _phi_range = r; |
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147 | } |
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148 | |
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149 | inline void RadialShooter::setPhiRange(float r1, float r2) |
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150 | { |
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151 | _phi_range.minimum = r1; |
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152 | _phi_range.maximum = r2; |
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153 | } |
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154 | |
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155 | inline void RadialShooter::setInitialSpeedRange(const rangef& r) |
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156 | { |
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157 | _speed_range = r; |
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158 | } |
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159 | |
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160 | inline void RadialShooter::setInitialSpeedRange(float r1, float r2) |
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161 | { |
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162 | _speed_range.minimum = r1; |
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163 | _speed_range.maximum = r2; |
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164 | } |
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165 | |
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166 | inline void RadialShooter::setInitialRotationalSpeedRange(const rangev3& r) |
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167 | { |
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168 | _rot_speed_range = r; |
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169 | } |
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170 | |
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171 | inline void RadialShooter::setInitialRotationalSpeedRange(const osg::Vec3& r1, const osg::Vec3& r2) |
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172 | { |
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173 | _rot_speed_range.minimum = r1; |
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174 | _rot_speed_range.maximum = r2; |
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175 | } |
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176 | |
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177 | inline void RadialShooter::shoot(Particle* P) const |
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178 | { |
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179 | float theta = _theta_range.get_random(); |
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180 | float phi = _phi_range.get_random(); |
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181 | float speed = _speed_range.get_random(); |
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182 | osg::Vec3 rot_speed = _rot_speed_range.get_random(); |
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183 | |
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184 | P->setVelocity(osg::Vec3( |
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185 | speed * sinf(theta) * cosf(phi), |
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186 | speed * sinf(theta) * sinf(phi), |
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187 | speed * cosf(theta) |
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188 | )); |
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189 | |
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190 | P->setAngularVelocity(rot_speed); |
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191 | } |
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192 | |
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193 | } |
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194 | |
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195 | |
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196 | #endif |
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