void osgManipulator::computeNodePathToRoot(osg::Node& node, osg::NodePath& np)
{
np.clear();
osg::ref_ptr<FindNodePathToRootVisitor> visitor = new FindNodePathToRootVisitor(np);
node.accept(*visitor);
np.pop_back();
std::reverse(np.begin(), np.end());
}
ImageOverlayEditor::EditPoint
ImageOverlayEditor::getEditPoint(const osg::NodePath &nodePath)
{
for (osg::NodePath::const_iterator itr = nodePath.begin(); itr != nodePath.end(); ++itr)
{
if ((*itr)->getName() == "LOWER_LEFT") return EDITPOINT_LOWER_LEFT;
if ((*itr)->getName() == "LOWER_RIGHT") return EDITPOINT_LOWER_RIGHT;
if ((*itr)->getName() == "UPPER_LEFT") return EDITPOINT_UPPER_LEFT;
if ((*itr)->getName() == "UPPER_RIGHT") return EDITPOINT_UPPER_RIGHT;
if ((*itr)->getName() == "CENTER") return EDITPOINT_CENTER;
}
return EDITPOINT_NONE;
}
/** Compute intersections between a ray through the specified master cameras window/eye coords and a specified nodePath's subgraph. */
bool ossimPlanetViewer::computeIntersections(float x,
float y,
const osg::NodePath& nodePath,
osgUtil::LineSegmentIntersector::Intersections& intersections,
osg::Node::NodeMask traversalMask)
{
if (!_camera.valid() || nodePath.empty()) return false;
float local_x, local_y = 0.0;
const osg::Camera* camera = getCameraContainingPosition(x, y, local_x, local_y);
if (!camera)
{
if(theIntersectWithMasterIfNotWithinAnyViewFlag)
{
camera = forceAdjustToMasterCamera(x, y, local_x, local_y);
if(!camera) return false;
}
else
{
return false;
}
}
osg::Matrixd matrix;
if (nodePath.size()>1)
{
osg::NodePath prunedNodePath(nodePath.begin(),nodePath.end()-1);
matrix = osg::computeLocalToWorld(prunedNodePath);
}
matrix.postMult(camera->getViewMatrix());
matrix.postMult(camera->getProjectionMatrix());
double zNear = -1.0;
double zFar = 1.0;
if (camera->getViewport())
{
matrix.postMult(camera->getViewport()->computeWindowMatrix());
zNear = 0.0;
zFar = 1.0;
}
osg::Matrixd inverse;
inverse.invert(matrix);
osg::Vec3d startVertex = osg::Vec3d(local_x,local_y,zNear) * inverse;
osg::Vec3d endVertex = osg::Vec3d(local_x,local_y,zFar) * inverse;
osg::ref_ptr< osgUtil::LineSegmentIntersector > picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::MODEL, startVertex, endVertex);
osgUtil::IntersectionVisitor iv(picker.get());
iv.setTraversalMask(traversalMask);
nodePath.back()->accept(iv);
if (picker->containsIntersections())
{
intersections = picker->getIntersections();
return true;
}
else
{
intersections.clear();
return false;
}
}