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19 | #include <osgGA/OrbitManipulator> |
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20 | #include <osg/BoundsChecking> |
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21 | #include <cassert> |
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22 | |
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23 | using namespace osg; |
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24 | using namespace osgGA; |
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25 | |
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26 | |
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27 | |
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28 | int OrbitManipulator::_minimumDistanceFlagIndex = allocateRelativeFlag(); |
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29 | |
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30 | |
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31 | |
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32 | OrbitManipulator::OrbitManipulator( int flags ) |
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33 | : inherited( flags ), |
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34 | _distance( 1. ), |
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35 | _trackballSize( 0.8 ) |
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36 | { |
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37 | setMinimumDistance( 0.05, true ); |
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38 | setWheelZoomFactor( 0.1 ); |
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39 | if( _flags & SET_CENTER_ON_WHEEL_FORWARD_MOVEMENT ) |
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40 | setAnimationTime( 0.2 ); |
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41 | } |
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42 | |
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43 | |
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44 | |
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45 | OrbitManipulator::OrbitManipulator( const OrbitManipulator& om, const CopyOp& copyOp ) |
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46 | : inherited( om, copyOp ), |
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47 | _center( om._center ), |
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48 | _rotation( om._rotation ), |
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49 | _distance( om._distance ), |
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50 | _trackballSize( om._trackballSize ), |
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51 | _wheelZoomFactor( om._wheelZoomFactor ), |
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52 | _minimumDistance( om._minimumDistance ) |
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53 | { |
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54 | } |
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55 | |
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56 | |
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57 | |
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58 | void OrbitManipulator::setByMatrix( const osg::Matrixd& matrix ) |
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59 | { |
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60 | _center = osg::Vec3d( 0., 0., -_distance ) * matrix; |
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61 | _rotation = matrix.getRotate(); |
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62 | |
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63 | |
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64 | if( getVerticalAxisFixed() ) |
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65 | fixVerticalAxis( _center, _rotation, true ); |
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66 | } |
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67 | |
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68 | |
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69 | |
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70 | void OrbitManipulator::setByInverseMatrix( const osg::Matrixd& matrix ) |
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71 | { |
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72 | setByMatrix( osg::Matrixd::inverse( matrix ) ); |
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73 | } |
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74 | |
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75 | |
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76 | |
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77 | osg::Matrixd OrbitManipulator::getMatrix() const |
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78 | { |
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79 | return osg::Matrixd::translate( 0., 0., _distance ) * |
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80 | osg::Matrixd::rotate( _rotation ) * |
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81 | osg::Matrixd::translate( _center ); |
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82 | } |
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83 | |
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84 | |
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85 | |
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86 | |
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87 | osg::Matrixd OrbitManipulator::getInverseMatrix() const |
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88 | { |
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89 | return osg::Matrixd::translate( -_center ) * |
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90 | osg::Matrixd::rotate( _rotation.inverse() ) * |
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91 | osg::Matrixd::translate( 0.0, 0.0, -_distance ); |
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92 | } |
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93 | |
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94 | |
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95 | |
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96 | void OrbitManipulator::setTransformation( const osg::Vec3d& eye, const osg::Quat& rotation ) |
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97 | { |
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98 | _center = eye + rotation * osg::Vec3d( 0., 0., -_distance ); |
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99 | _rotation = rotation; |
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100 | |
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101 | |
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102 | if( getVerticalAxisFixed() ) |
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103 | fixVerticalAxis( _center, _rotation, true ); |
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104 | } |
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105 | |
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106 | |
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107 | |
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108 | void OrbitManipulator::getTransformation( osg::Vec3d& eye, osg::Quat& rotation ) const |
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109 | { |
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110 | eye = _center - _rotation * osg::Vec3d( 0., 0., -_distance ); |
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111 | rotation = _rotation; |
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112 | } |
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113 | |
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114 | |
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115 | |
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116 | void OrbitManipulator::setTransformation( const osg::Vec3d& eye, const osg::Vec3d& center, const osg::Vec3d& up ) |
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117 | { |
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118 | Vec3d lv( center - eye ); |
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119 | |
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120 | Vec3d f( lv ); |
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121 | f.normalize(); |
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122 | Vec3d s( f^up ); |
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123 | s.normalize(); |
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124 | Vec3d u( s^f ); |
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125 | u.normalize(); |
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126 | |
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127 | osg::Matrixd rotation_matrix( s[0], u[0], -f[0], 0.0f, |
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128 | s[1], u[1], -f[1], 0.0f, |
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129 | s[2], u[2], -f[2], 0.0f, |
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130 | 0.0f, 0.0f, 0.0f, 1.0f ); |
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131 | |
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132 | _center = center; |
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133 | _distance = lv.length(); |
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134 | _rotation = rotation_matrix.getRotate().inverse(); |
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135 | |
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136 | |
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137 | if( getVerticalAxisFixed() ) |
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138 | fixVerticalAxis( _center, _rotation, true ); |
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139 | } |
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140 | |
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141 | |
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142 | |
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143 | void OrbitManipulator::getTransformation( osg::Vec3d& eye, osg::Vec3d& center, osg::Vec3d& up ) const |
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144 | { |
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145 | center = _center; |
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146 | eye = _center + _rotation * osg::Vec3d( 0., 0., _distance ); |
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147 | up = _rotation * osg::Vec3d( 0., 1., 0. ); |
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148 | } |
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149 | |
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150 | |
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151 | |
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152 | |
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153 | |
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154 | void OrbitManipulator::setHeading( double azimuth ) |
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155 | { |
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156 | CoordinateFrame coordinateFrame = getCoordinateFrame( _center ); |
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157 | Vec3d localUp = getUpVector( coordinateFrame ); |
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158 | Vec3d localRight = getSideVector( coordinateFrame ); |
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159 | |
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160 | Vec3d dir = Quat( getElevation(), localRight ) * Quat( azimuth, localUp ) * Vec3d( 0., -_distance, 0. ); |
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161 | |
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162 | setTransformation( _center + dir, _center, localUp ); |
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163 | } |
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164 | |
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165 | |
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166 | |
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167 | double OrbitManipulator::getHeading() const |
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168 | { |
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169 | CoordinateFrame coordinateFrame = getCoordinateFrame( _center ); |
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170 | Vec3d localFront = getFrontVector( coordinateFrame ); |
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171 | Vec3d localRight = getSideVector( coordinateFrame ); |
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172 | |
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173 | Vec3d center, eye, tmp; |
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174 | getTransformation( eye, center, tmp ); |
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175 | |
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176 | Plane frontPlane( localFront, center ); |
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177 | double frontDist = frontPlane.distance( eye ); |
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178 | Plane rightPlane( localRight, center ); |
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179 | double rightDist = rightPlane.distance( eye ); |
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180 | |
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181 | return atan2( rightDist, -frontDist ); |
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182 | } |
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183 | |
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184 | |
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185 | |
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186 | |
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187 | |
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188 | void OrbitManipulator::setElevation( double elevation ) |
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189 | { |
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190 | CoordinateFrame coordinateFrame = getCoordinateFrame( _center ); |
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191 | Vec3d localUp = getUpVector( coordinateFrame ); |
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192 | Vec3d localRight = getSideVector( coordinateFrame ); |
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193 | |
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194 | Vec3d dir = Quat( -elevation, localRight ) * Quat( getHeading(), localUp ) * Vec3d( 0., -_distance, 0. ); |
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195 | |
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196 | setTransformation( _center + dir, _center, localUp ); |
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197 | } |
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198 | |
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199 | |
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200 | |
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201 | double OrbitManipulator::getElevation() const |
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202 | { |
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203 | CoordinateFrame coordinateFrame = getCoordinateFrame( _center ); |
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204 | Vec3d localUp = getUpVector( coordinateFrame ); |
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205 | localUp.normalize(); |
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206 | |
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207 | Vec3d center, eye, tmp; |
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208 | getTransformation( eye, center, tmp ); |
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209 | |
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210 | Plane plane( localUp, center ); |
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211 | double dist = plane.distance( eye ); |
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212 | |
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213 | return asin( -dist / (eye-center).length() ); |
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214 | } |
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215 | |
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216 | |
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217 | |
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218 | bool OrbitManipulator::handleMouseWheel( const GUIEventAdapter& ea, GUIActionAdapter& us ) |
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219 | { |
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220 | osgGA::GUIEventAdapter::ScrollingMotion sm = ea.getScrollingMotion(); |
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221 | |
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222 | |
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223 | if( _flags & SET_CENTER_ON_WHEEL_FORWARD_MOVEMENT ) |
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224 | { |
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225 | |
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226 | if( ((sm == GUIEventAdapter::SCROLL_DOWN && _wheelZoomFactor > 0.)) || |
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227 | ((sm == GUIEventAdapter::SCROLL_UP && _wheelZoomFactor < 0.)) ) |
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228 | { |
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229 | |
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230 | if( getAnimationTime() <= 0. ) |
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231 | { |
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232 | |
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233 | setCenterByMousePointerIntersection( ea, us ); |
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234 | } |
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235 | else |
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236 | { |
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237 | |
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238 | if( !isAnimating() ) |
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239 | startAnimationByMousePointerIntersection( ea, us ); |
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240 | |
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241 | } |
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242 | |
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243 | } |
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244 | } |
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245 | |
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246 | switch( sm ) |
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247 | { |
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248 | |
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249 | case GUIEventAdapter::SCROLL_UP: |
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250 | { |
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251 | |
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252 | zoomModel( _wheelZoomFactor, true ); |
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253 | us.requestRedraw(); |
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254 | us.requestContinuousUpdate( isAnimating() || _thrown ); |
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255 | return true; |
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256 | } |
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257 | |
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258 | |
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259 | case GUIEventAdapter::SCROLL_DOWN: |
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260 | { |
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261 | |
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262 | zoomModel( -_wheelZoomFactor, true ); |
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263 | us.requestRedraw(); |
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264 | us.requestContinuousUpdate( isAnimating() || _thrown ); |
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265 | return true; |
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266 | } |
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267 | |
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268 | |
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269 | default: |
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270 | return false; |
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271 | } |
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272 | } |
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273 | |
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274 | |
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275 | |
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276 | bool OrbitManipulator::performMovementLeftMouseButton( const double eventTimeDelta, const double dx, const double dy ) |
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277 | { |
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278 | |
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279 | if( getVerticalAxisFixed() ) |
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280 | rotateWithFixedVertical( dx, dy ); |
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281 | else |
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282 | rotateTrackball( _ga_t0->getXnormalized(), _ga_t0->getYnormalized(), |
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283 | _ga_t1->getXnormalized(), _ga_t1->getYnormalized(), |
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284 | getThrowScale( eventTimeDelta ) ); |
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285 | return true; |
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286 | } |
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287 | |
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288 | |
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289 | |
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290 | bool OrbitManipulator::performMovementMiddleMouseButton( const double eventTimeDelta, const double dx, const double dy ) |
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291 | { |
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292 | |
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293 | float scale = -0.3f * _distance * getThrowScale( eventTimeDelta ); |
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294 | panModel( dx*scale, dy*scale ); |
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295 | return true; |
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296 | } |
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297 | |
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298 | |
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299 | |
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300 | bool OrbitManipulator::performMovementRightMouseButton( const double eventTimeDelta, const double dx, const double dy ) |
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301 | { |
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302 | |
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303 | zoomModel( dy * getThrowScale( eventTimeDelta ), true ); |
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304 | return true; |
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305 | } |
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306 | |
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307 | |
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308 | bool OrbitManipulator::performMouseDeltaMovement( const float dx, const float dy ) |
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309 | { |
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310 | |
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311 | if( getVerticalAxisFixed() ) |
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312 | rotateWithFixedVertical( dx, dy ); |
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313 | else |
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314 | rotateTrackball( 0.f, 0.f, dx, dy, 1.f ); |
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315 | |
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316 | return true; |
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317 | } |
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318 | |
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319 | |
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320 | void OrbitManipulator::applyAnimationStep( const double currentProgress, const double prevProgress ) |
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321 | { |
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322 | OrbitAnimationData *ad = dynamic_cast< OrbitAnimationData* >( _animationData.get() ); |
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323 | assert( ad ); |
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324 | |
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325 | |
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326 | osg::Vec3d prevCenter, prevEye, prevUp; |
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327 | getTransformation( prevEye, prevCenter, prevUp ); |
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328 | osg::Vec3d newCenter = osg::Vec3d(prevCenter) + (ad->_movement * (currentProgress - prevProgress)); |
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329 | |
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330 | |
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331 | if( getVerticalAxisFixed() ) |
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332 | { |
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333 | |
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334 | CoordinateFrame coordinateFrame = getCoordinateFrame( newCenter ); |
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335 | Vec3d localUp = getUpVector( coordinateFrame ); |
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336 | |
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337 | fixVerticalAxis( newCenter - prevEye, prevUp, prevUp, localUp, false ); |
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338 | } |
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339 | |
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340 | |
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341 | setTransformation( prevEye, newCenter, prevUp ); |
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342 | } |
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343 | |
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344 | |
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345 | bool OrbitManipulator::startAnimationByMousePointerIntersection( |
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346 | const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& us ) |
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347 | { |
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348 | |
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349 | osg::Vec3d prevCenter, prevEye, prevUp; |
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350 | getTransformation( prevEye, prevCenter, prevUp ); |
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351 | |
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352 | |
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353 | if( !setCenterByMousePointerIntersection( ea, us ) ) |
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354 | return false; |
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355 | |
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356 | OrbitAnimationData *ad = dynamic_cast< OrbitAnimationData*>( _animationData.get() ); |
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357 | assert( ad ); |
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358 | |
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359 | |
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360 | ad->start( osg::Vec3d(_center) - prevCenter, ea.getTime() ); |
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361 | setTransformation( prevEye, prevCenter, prevUp ); |
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362 | |
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363 | return true; |
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364 | } |
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365 | |
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366 | |
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367 | void OrbitManipulator::OrbitAnimationData::start( const osg::Vec3d& movement, const double startTime ) |
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368 | { |
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369 | AnimationData::start( startTime ); |
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370 | |
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371 | _movement = movement; |
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372 | } |
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373 | |
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374 | |
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375 | |
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376 | |
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377 | |
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378 | |
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379 | |
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380 | void OrbitManipulator::rotateTrackball( const float px0, const float py0, |
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381 | const float px1, const float py1, const float scale ) |
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382 | { |
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383 | osg::Vec3d axis; |
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384 | float angle; |
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385 | |
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386 | trackball( axis, angle, px1, py1, px0, py0 ); |
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387 | |
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388 | Quat new_rotate; |
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389 | new_rotate.makeRotate( angle, axis ); |
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390 | |
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391 | _rotation = _rotation * new_rotate; |
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392 | } |
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393 | |
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394 | |
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395 | |
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396 | |
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397 | void OrbitManipulator::rotateWithFixedVertical( const float dx, const float dy ) |
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398 | { |
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399 | CoordinateFrame coordinateFrame = getCoordinateFrame( _center ); |
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400 | Vec3d localUp = getUpVector( coordinateFrame ); |
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401 | |
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402 | rotateYawPitch( _rotation, dx, dy, localUp ); |
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403 | } |
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404 | |
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405 | |
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406 | |
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407 | |
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408 | void OrbitManipulator::rotateWithFixedVertical( const float dx, const float dy, const Vec3f& up ) |
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409 | { |
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410 | rotateYawPitch( _rotation, dx, dy, up ); |
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411 | } |
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412 | |
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413 | |
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414 | |
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415 | void OrbitManipulator::panModel( const float dx, const float dy, const float dz ) |
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416 | { |
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417 | Matrix rotation_matrix; |
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418 | rotation_matrix.makeRotate( _rotation ); |
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419 | |
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420 | Vec3d dv( dx, dy, dz ); |
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421 | |
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422 | _center += dv * rotation_matrix; |
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423 | } |
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424 | |
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425 | |
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426 | |
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427 | |
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428 | |
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429 | |
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430 | |
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431 | |
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432 | void OrbitManipulator::zoomModel( const float dy, bool pushForwardIfNeeded ) |
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433 | { |
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434 | |
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435 | float scale = 1.0f + dy; |
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436 | |
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437 | |
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438 | float minDist = _minimumDistance; |
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439 | if( getRelativeFlag( _minimumDistanceFlagIndex ) ) |
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440 | minDist *= _modelSize; |
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441 | |
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442 | if( _distance*scale > minDist ) |
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443 | { |
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444 | |
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445 | _distance *= scale; |
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446 | } |
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447 | else |
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448 | { |
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449 | if( pushForwardIfNeeded ) |
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450 | { |
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451 | |
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452 | float scale = -_distance; |
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453 | Matrixd rotation_matrix( _rotation ); |
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454 | Vec3d dv = (Vec3d( 0.0f, 0.0f, -1.0f ) * rotation_matrix) * (dy * scale); |
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455 | _center += dv; |
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456 | } |
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457 | else |
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458 | { |
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459 | |
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460 | _distance = minDist; |
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461 | } |
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462 | } |
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463 | } |
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464 | |
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465 | |
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466 | |
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467 | |
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468 | |
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469 | |
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470 | |
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471 | |
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472 | |
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473 | |
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474 | |
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475 | |
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476 | |
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477 | |
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478 | void OrbitManipulator::trackball( osg::Vec3d& axis, float& angle, float p1x, float p1y, float p2x, float p2y ) |
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479 | { |
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480 | |
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481 | |
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482 | |
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483 | |
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484 | |
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485 | osg::Matrixd rotation_matrix(_rotation); |
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486 | |
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487 | osg::Vec3d uv = Vec3d(0.0f,1.0f,0.0f)*rotation_matrix; |
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488 | osg::Vec3d sv = Vec3d(1.0f,0.0f,0.0f)*rotation_matrix; |
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489 | osg::Vec3d lv = Vec3d(0.0f,0.0f,-1.0f)*rotation_matrix; |
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490 | |
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491 | osg::Vec3d p1 = sv * p1x + uv * p1y - lv * tb_project_to_sphere(_trackballSize, p1x, p1y); |
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492 | osg::Vec3d p2 = sv * p2x + uv * p2y - lv * tb_project_to_sphere(_trackballSize, p2x, p2y); |
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493 | |
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494 | |
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495 | |
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496 | |
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497 | axis = p2^p1; |
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498 | axis.normalize(); |
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499 | |
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500 | |
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501 | |
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502 | |
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503 | float t = (p2 - p1).length() / (2.0 * _trackballSize); |
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504 | |
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505 | |
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506 | |
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507 | |
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508 | if (t > 1.0) t = 1.0; |
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509 | if (t < -1.0) t = -1.0; |
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510 | angle = inRadians(asin(t)); |
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511 | } |
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512 | |
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513 | |
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514 | |
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515 | |
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516 | |
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517 | |
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518 | float OrbitManipulator::tb_project_to_sphere( float r, float x, float y ) |
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519 | { |
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520 | float d, t, z; |
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521 | |
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522 | d = sqrt(x*x + y*y); |
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523 | |
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524 | if (d < r * 0.70710678118654752440) |
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525 | { |
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526 | z = sqrt(r*r - d*d); |
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527 | } |
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528 | else |
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529 | { |
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530 | t = r / 1.41421356237309504880; |
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531 | z = t*t / d; |
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532 | } |
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533 | return z; |
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534 | } |
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535 | |
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536 | |
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537 | |
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538 | osgUtil::SceneView::FusionDistanceMode OrbitManipulator::getFusionDistanceMode() const |
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539 | { |
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540 | return osgUtil::SceneView::USE_FUSION_DISTANCE_VALUE; |
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541 | } |
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542 | |
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543 | |
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544 | float OrbitManipulator::getFusionDistanceValue() const |
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545 | { |
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546 | return _distance; |
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547 | } |
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548 | |
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549 | |
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550 | |
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551 | void OrbitManipulator::setCenter( const Vec3d& center ) |
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552 | { |
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553 | _center = center; |
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554 | } |
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555 | |
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556 | |
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557 | |
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558 | const Vec3d& OrbitManipulator::getCenter() const |
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559 | { |
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560 | return _center; |
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561 | } |
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562 | |
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563 | |
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564 | |
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565 | void OrbitManipulator::setRotation( const Quat& rotation ) |
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566 | { |
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567 | _rotation = rotation; |
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568 | } |
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569 | |
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570 | |
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571 | |
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572 | const Quat& OrbitManipulator::getRotation() const |
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573 | { |
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574 | return _rotation; |
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575 | } |
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576 | |
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577 | |
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578 | |
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579 | void OrbitManipulator::setDistance( double distance ) |
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580 | { |
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581 | _distance = distance; |
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582 | } |
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583 | |
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584 | |
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585 | |
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586 | double OrbitManipulator::getDistance() const |
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587 | { |
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588 | return _distance; |
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589 | } |
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590 | |
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591 | |
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592 | |
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593 | void OrbitManipulator::setTrackballSize( const double& size ) |
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594 | { |
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595 | |
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596 | |
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597 | |
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598 | |
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599 | |
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600 | |
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601 | |
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602 | _trackballSize = size; |
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603 | clampBetweenRange( _trackballSize, 0.1, 1.0, "TrackballManipulator::setTrackballSize(float)" ); |
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604 | } |
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605 | |
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606 | |
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607 | |
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608 | |
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609 | |
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610 | |
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611 | |
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612 | void OrbitManipulator::setWheelZoomFactor( double wheelZoomFactor ) |
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613 | { |
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614 | _wheelZoomFactor = wheelZoomFactor; |
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615 | } |
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616 | |
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617 | |
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618 | |
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619 | |
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620 | void OrbitManipulator::setMinimumDistance( const double& minimumDistance, bool relativeToModelSize ) |
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621 | { |
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622 | _minimumDistance = minimumDistance; |
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623 | setRelativeFlag( _minimumDistanceFlagIndex, relativeToModelSize ); |
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624 | } |
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625 | |
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626 | |
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627 | |
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628 | |
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629 | double OrbitManipulator::getMinimumDistance( bool *relativeToModelSize ) const |
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630 | { |
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631 | if( relativeToModelSize ) |
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632 | *relativeToModelSize = getRelativeFlag( _minimumDistanceFlagIndex ); |
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633 | |
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634 | return _minimumDistance; |
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635 | } |
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