[417] | 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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