1 | /* -*-c++-*- osgVisual - Copyright (C) 2009-2011 Torben Dannhauer |
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2 | * |
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3 | * This library is based on OpenSceneGraph, 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 | * osgVisual requires for some proprietary modules a license from the correspondig manufacturer. |
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9 | * You have to aquire licenses for all used proprietary modules. |
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10 | * |
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11 | * This library is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * OpenSceneGraph Public License for more details. |
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15 | */ |
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16 | |
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17 | #include <visual_util.h> |
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18 | #include <osg/Material> |
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19 | |
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20 | using namespace osgVisual; |
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21 | |
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22 | util::util(void) |
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23 | { |
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24 | } |
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25 | |
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26 | util::~util(void) |
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27 | { |
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28 | } |
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29 | |
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30 | osg::Node* util::findNamedNode(const std::string& searchName_, osg::Node* currNode_) |
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31 | { |
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32 | osg::Group* currGroup; |
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33 | osg::Node* foundNode; |
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34 | |
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35 | // check to see if we have a valid (non-NULL) node. |
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36 | // if we do have a null node, return NULL. |
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37 | if ( !currNode_) |
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38 | { |
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39 | return NULL; |
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40 | } |
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41 | |
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42 | // We have a valid node, check to see if this is the node we |
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43 | // are looking for. If so, return the current node. |
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44 | if (currNode_->getName() == searchName_) |
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45 | { |
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46 | return currNode_; |
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47 | } |
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48 | |
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49 | // We have a valid node, but not the one we are looking for. |
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50 | // Check to see if it has children (non-leaf node). If the node |
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51 | // has children, check each of the child nodes by recursive call. |
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52 | // If one of the recursive calls returns a non-null value we have |
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53 | // found the correct node, so return this node. |
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54 | // If we check all of the children and have not found the node, |
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55 | // return NULL |
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56 | currGroup = currNode_->asGroup(); // returns NULL if not a group. |
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57 | if ( currGroup ) |
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58 | { |
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59 | for (unsigned int i = 0 ; i < currGroup->getNumChildren(); i ++) |
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60 | { |
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61 | foundNode = findNamedNode(searchName_, currGroup->getChild(i)); |
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62 | if (foundNode) |
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63 | { |
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64 | std::cout << "Node gefunden in Ebene: " << i << std::endl; |
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65 | return foundNode; // found a match! |
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66 | } |
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67 | } |
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68 | return NULL; // We have checked each child node - no match found. |
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69 | } |
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70 | else |
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71 | return NULL; // leaf node, no match |
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72 | } |
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73 | |
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74 | osg::ref_ptr<osg::Geode> util::getDemoCylinder(double length_, double width_, osg::Vec3 offset_ ) |
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75 | { |
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76 | osg::ref_ptr<osg::Geode> cyl = new osg::Geode(); |
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77 | osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable(new osg::Cylinder( offset_, width_, length_ )); |
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78 | osg::Vec4 color = osg::Vec4(255.0, 0.0, 0.0, 1.0); |
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79 | shape->setColor( color ); |
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80 | cyl->addDrawable( shape ); |
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81 | |
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82 | return cyl; |
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83 | } |
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84 | |
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85 | osg::ref_ptr<osg::Geode> util::getDemoSphere(double radius_, osg::Vec3 offset_ ) |
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86 | { |
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87 | osg::ref_ptr<osg::Geode> sphere = new osg::Geode(); |
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88 | osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable(new osg::Sphere( offset_, radius_ ) ); |
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89 | osg::Vec4 color = osg::Vec4(255.0, 0.0, 0.0, 1.0); |
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90 | shape->setColor( color ); |
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91 | sphere->addDrawable( shape ); |
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92 | |
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93 | return sphere; |
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94 | } |
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95 | |
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96 | bool util::intersect(const osg::Vec3d& start_, const osg::Vec3d& end_, osg::Vec3d& intersection_, osg::Node* node_, osg::Node::NodeMask intersectTraversalMask_ ) |
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97 | { |
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98 | osg::ref_ptr<osgUtil::LineSegmentIntersector> lsi = new osgUtil::LineSegmentIntersector(start_,end_); |
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99 | |
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100 | osgUtil::IntersectionVisitor iv(lsi.get()); |
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101 | iv.setTraversalMask(intersectTraversalMask_); |
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102 | |
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103 | node_->accept(iv); |
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104 | |
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105 | if (lsi->containsIntersections()) |
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106 | { |
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107 | intersection_ = lsi->getIntersections().begin()->getWorldIntersectPoint(); |
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108 | return true; // Intersect found |
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109 | } |
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110 | return false; // No intersect found |
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111 | } |
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112 | |
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113 | bool util::queryHeightOfTerrain(double& hot_, osg::Node* rootNode_, double lat_, double lon_, osg::Node::NodeMask traversalMask_) |
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114 | { |
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115 | // Get ellipsoid model |
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116 | osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(rootNode_); |
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117 | if ( !csn ) |
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118 | { |
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119 | OSG_NOTIFY( osg::FATAL ) << "util::queryHeightOfTerrain() :: Invalid CSN!" << std::endl; |
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120 | return false; |
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121 | } |
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122 | osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel(); |
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123 | if ( !ellipsoid ) |
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124 | { |
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125 | OSG_NOTIFY( osg::FATAL ) << "util::queryHeightOfTerrain() :: Invalid ellipsoid!" << std::endl; |
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126 | return false; |
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127 | } |
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128 | |
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129 | // Setup both endpoints of intersect line |
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130 | double X,Y,Z; |
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131 | ellipsoid->convertLatLongHeightToXYZ(lat_, lon_, 30000, X, Y, Z); |
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132 | osg::Vec3d s = osg::Vec3d(X, Y, Z); |
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133 | ellipsoid->convertLatLongHeightToXYZ(lat_, lon_, -30000, X, Y, Z); |
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134 | osg::Vec3d e = osg::Vec3d(X, Y, Z); |
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135 | |
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136 | // Query intersection point |
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137 | osg::Vec3d ip; |
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138 | if ( util::intersect(s, e, ip, rootNode_, traversalMask_) ) |
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139 | { |
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140 | double lat2_, lon2_; |
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141 | ellipsoid->convertXYZToLatLongHeight( ip.x(), ip.y(), ip.z(), lat2_, lon2_, hot_ ); // Convert Intersection Point back to Lat Lon, HOT. |
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142 | //OSG_NOTIFY(osg::ALWAYS) << "lat: "<< osg::RadiansToDegrees(lat2_) <<", Lon: " << osg::RadiansToDegrees(lon2_) << ", Hot: " << hot_ << std::endl; |
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143 | return true; |
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144 | } |
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145 | |
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146 | // If no intersection point found: set HOT to zero and return false. |
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147 | hot_ = 0; |
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148 | return false; |
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149 | } |
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150 | |
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151 | bool util::queryHeightAboveTerrainInWGS84(double& hat_, osg::Node* rootNode_, double lat_, double lon_, double height_, osg::Node::NodeMask traversalMask_) |
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152 | { |
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153 | // Get HOT by asking util::queryHeightOfTerrain() :) |
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154 | double HOT; |
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155 | if ( !util::queryHeightOfTerrain(HOT, rootNode_, lat_, lon_, traversalMask_) ) |
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156 | { |
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157 | OSG_NOTIFY( osg::INFO ) << "util::queryHeightAboveTerrainInWGS84() :: Unable to get HOT, will use 0 for HOT!" << std::endl; |
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158 | } |
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159 | |
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160 | // Calculate HAT |
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161 | hat_ = height_ - HOT; |
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162 | return true; |
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163 | } |
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164 | |
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165 | bool util::queryHeightAboveTerrainInWorld(double& hat_, osg::Node* rootNode_, double x_, double y_, double z_, osg::Node::NodeMask traversalMask_) |
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166 | { |
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167 | // Get ellipsoid model |
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168 | osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(rootNode_); |
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169 | if ( !csn ) |
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170 | { |
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171 | OSG_NOTIFY( osg::FATAL ) << "util::queryHeightAboveTerrainInWorld() :: Invalid CSN!" << std::endl; |
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172 | return false; |
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173 | } |
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174 | osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel(); |
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175 | if ( !ellipsoid ) |
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176 | { |
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177 | OSG_NOTIFY( osg::FATAL ) << "util::queryHeightAboveTerrainInWorld() :: Invalid ellipsoid!" << std::endl; |
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178 | return false; |
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179 | } |
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180 | |
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181 | // Transform XYZ into LatLonHeight |
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182 | double lat_, lon_, height_; |
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183 | ellipsoid->convertXYZToLatLongHeight(x_, y_, z_, lat_, lon_, height_); |
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184 | |
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185 | // ask util::queryHeightAboveTerrainInWGS84() to calc HAT :) |
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186 | if( !util::queryHeightAboveTerrainInWGS84(hat_, rootNode_, lat_, lon_, height_, traversalMask_ ) ) |
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187 | { |
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188 | OSG_NOTIFY( osg::FATAL ) << "util::queryHeightAboveTerrainInWorld() :: Unable to get HAT!" << std::endl; |
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189 | return false; |
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190 | } |
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191 | |
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192 | return true; |
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193 | } |
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194 | |
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195 | bool util::calculateEarthRadiusAtWGS84Coordinate(double lat_, double lon_, osg::Node* rootNode_, double& radius_) |
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196 | { |
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197 | // Calculate radius: |
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198 | double x, y, z; |
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199 | |
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200 | if ( util::calculateXYZAtWGS84Coordinate(lat_, lon_, 0.0, rootNode_, x, y, z) ) |
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201 | { |
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202 | radius_ = sqrt( pow(x, 2) + pow(y, 2) + pow(z, 2) ); |
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203 | return true; |
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204 | } |
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205 | else |
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206 | { |
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207 | OSG_NOTIFY( osg::FATAL ) << "util::calculateEarthRadiusAtWGS84Coordinate() :: Unable to calculate Earth Radius!" << std::endl; |
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208 | return false; |
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209 | } |
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210 | } |
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211 | |
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212 | bool util::calculateXYZAtWGS84Coordinate(double lat_, double lon_, double height_, osg::Node* rootNode_, double& x_, double& y_, double& z_) |
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213 | { |
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214 | // Get ellipsoid model |
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215 | osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(rootNode_); |
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216 | if ( !csn ) |
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217 | return false; |
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218 | osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel(); |
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219 | if ( !ellipsoid ) |
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220 | return false; |
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221 | |
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222 | // Calculate xyz: |
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223 | ellipsoid->convertLatLongHeightToXYZ( lat_, lon_, height_, x_, y_, z_); |
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224 | return true; |
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225 | } |
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226 | |
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227 | bool util::getWGS84ofCamera( osg::Camera* camera_, osg::Node* rootNode_, double& lat_, double& lon_, double& height_ ) |
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228 | { |
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229 | // Get ellipsoid model |
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230 | osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(rootNode_); |
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231 | if ( !csn ) |
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232 | return false; |
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233 | osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel(); |
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234 | if ( !ellipsoid ) |
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235 | return false; |
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236 | |
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237 | osg::Vec3d eye, dir, up; |
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238 | camera_->getViewMatrixAsLookAt(eye,dir,up); // Get XYZ from camera |
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239 | ellipsoid->convertXYZToLatLongHeight(eye.x(), eye.y(), eye.z(), lat_, lon_, height_); |
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240 | return true; |
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241 | } |
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242 | |
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243 | void util::getXYZofCamera( osg::Camera* camera_, double& x_, double& y_, double& z_ ) |
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244 | { |
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245 | osg::Vec3d eye, dir, up; |
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246 | camera_->getViewMatrixAsLookAt(eye,dir,up); // Get XYZ from camera |
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247 | x_ = eye.x(); |
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248 | y_ = eye.y(); |
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249 | z_ = eye.z(); |
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250 | } |
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251 | |
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252 | |
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253 | double util::strToDouble(std::string s) |
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254 | { |
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255 | double tmp; |
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256 | std::stringstream sstr(s); |
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257 | if (!(sstr >> tmp)) |
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258 | { |
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259 | OSG_ALWAYS << __FUNCTION__ << "Warning:Unable to convert "<< s <<" to double, using 0.0 as default!" << std::endl; |
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260 | return 0.0; |
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261 | } |
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262 | else |
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263 | return tmp; |
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264 | } |
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265 | |
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266 | int util::strToInt(std::string s) |
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267 | { |
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268 | int tmp; |
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269 | std::stringstream sstr(s); |
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270 | if (!(sstr >> tmp)) |
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271 | { |
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272 | OSG_ALWAYS << __FUNCTION__ << "Warning:Unable to convert "<< s <<" to int, using 0 as default!" << std::endl; |
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273 | return 0; |
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274 | } |
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275 | else |
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276 | return tmp; |
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277 | } |
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278 | |
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279 | bool util::strToBool(std::string s) |
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280 | { |
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281 | if(s=="yes") |
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282 | return(true); |
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283 | if(s=="no") |
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284 | return(false); |
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285 | OSG_ALWAYS << __FUNCTION__ << "Warning:Unable to convert "<< s <<" to bool, using false as default!" << std::endl; |
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286 | return(false); |
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287 | } |
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288 | |
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289 | void util::AddCylinderBetweenPoints(osg::Vec3d StartPoint, osg::Vec3d EndPoint, float radius, osg::Vec4d CylinderColor, osg::Group *pAddToThisGroup) |
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290 | { |
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291 | osg::ref_ptr<osg::Geode> geode = new osg::Geode; |
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292 | osg::Vec3d center; |
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293 | float height; |
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294 | osg::ref_ptr<osg::Cylinder> cylinder; |
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295 | osg::ref_ptr<osg::Drawable> cylinderDrawable; |
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296 | osg::ref_ptr<osg::Material> pMaterial; |
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297 | |
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298 | height = (StartPoint-EndPoint).length(); |
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299 | center = osg::Vec3( (StartPoint.x() + EndPoint.x()) / 2, (StartPoint.y() + EndPoint.y()) / 2, (StartPoint.z() + EndPoint.z()) / 2); |
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300 | |
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301 | // This is the default direction for the cylinders to face in OpenGL |
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302 | osg::Vec3d z = osg::Vec3d(0,0,1); |
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303 | |
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304 | // Get diff between two points you want cylinder along |
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305 | osg::Vec3d p = StartPoint - EndPoint; |
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306 | |
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307 | // Get CROSS product (the axis of rotation) |
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308 | osg::Vec3d t = z ^ p; |
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309 | |
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310 | // Get angle. length is magnitude of the vector |
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311 | double angle = acos( (z * p) / p.length()); |
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312 | |
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313 | // Create a cylinder between the two points with the given radius |
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314 | cylinder = new osg::Cylinder(center,radius,height); |
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315 | cylinder->setRotation(osg::Quat(angle, osg::Vec3(t.x(), t.y(), t.z()))); |
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316 | |
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317 | cylinderDrawable = new osg::ShapeDrawable(cylinder ); |
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318 | geode->addDrawable(cylinderDrawable); |
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319 | |
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320 | // Set the color of the cylinder that extends between the two points. |
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321 | pMaterial = new osg::Material; |
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322 | pMaterial->setDiffuse( osg::Material::FRONT, CylinderColor); |
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323 | geode->getOrCreateStateSet()->setAttribute( pMaterial, osg::StateAttribute::OVERRIDE ); |
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324 | |
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325 | // Add the cylinder between the two points to an existing group |
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326 | pAddToThisGroup->addChild(geode); |
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327 | } |
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