osgSim::HeightAboveTerrain Class Reference

List of all members.

Public Member Functions

 HeightAboveTerrain ()
void clear ()
unsigned int addPoint (const osg::Vec3d &point)
unsigned int getNumPoints () const
void setPoint (unsigned int i, const osg::Vec3d &point)
const osg::Vec3dgetPoint (unsigned int i) const
double getHeightAboveTerrain (unsigned int i) const
void setLowestHeight (double lowestHeight)
double getLowestHeight () const
void computeIntersections (osg::Node *scene, osg::Node::NodeMask traversalMask=0xffffffff)
void clearDatabaseCache ()
void setDatabaseCacheReadCallback (DatabaseCacheReadCallback *dcrc)
DatabaseCacheReadCallbackgetDatabaseCacheReadCallback ()

Static Public Member Functions

static double computeHeightAboveTerrain (osg::Node *scene, const osg::Vec3d &point, osg::Node::NodeMask traversalMask=0xffffffff)

Protected Types

typedef std::vector< HATHATList

Protected Attributes

double _lowestHeight
HATList _HATList
osg::ref_ptr
< DatabaseCacheReadCallback
_dcrc
osgUtil::IntersectionVisitor _intersectionVisitor

Classes

struct  HAT


Detailed Description

Helper class for setting up and acquiring height above terrain intersections with terrain.

Member Typedef Documentation

typedef std::vector<HAT> osgSim::HeightAboveTerrain::HATList [protected]


Constructor & Destructor Documentation

osgSim::HeightAboveTerrain::HeightAboveTerrain (  ) 


Member Function Documentation

void osgSim::HeightAboveTerrain::clear (  ) 

Clear the internal HAT List so it contains no height above terrain tests.

unsigned int osgSim::HeightAboveTerrain::addPoint ( const osg::Vec3d point  ) 

Add a height above terrain test point in the CoordinateFrame.

unsigned int osgSim::HeightAboveTerrain::getNumPoints (  )  const [inline]

Get the number of height above terrain tests.

void osgSim::HeightAboveTerrain::setPoint ( unsigned int  i,
const osg::Vec3d point 
) [inline]

Set the source point of single height above terrain test.

const osg::Vec3d& osgSim::HeightAboveTerrain::getPoint ( unsigned int  i  )  const [inline]

Get the source point of single height above terrain test.

double osgSim::HeightAboveTerrain::getHeightAboveTerrain ( unsigned int  i  )  const [inline]

Get the intersection height for a single height above terrain test. Note, you must call computeIntersections(..) before you can query the HeightAboveTerrain. If no intersections are found then height returned will be the height above mean sea level.

void osgSim::HeightAboveTerrain::setLowestHeight ( double  lowestHeight  )  [inline]

Set the lowest height that the should be tested for. Defaults to -1000, i.e. 1000m below mean sea level.

double osgSim::HeightAboveTerrain::getLowestHeight (  )  const [inline]

Get the lowest height that the should be tested for.

void osgSim::HeightAboveTerrain::computeIntersections ( osg::Node scene,
osg::Node::NodeMask  traversalMask = 0xffffffff 
)

Compute the HAT intersections with the specified scene graph. The results are all stored in the form of a single height above terrain value per HAT test. Note, if the topmost node is a CoordinateSystemNode then the input points are assumed to be geocentric, with the up vector defined by the EllipsoidModel attached to the CoordinateSystemNode. If the topmost node is not a CoordinateSystemNode then a local coordinates frame is assumed, with a local up vector.

static double osgSim::HeightAboveTerrain::computeHeightAboveTerrain ( osg::Node scene,
const osg::Vec3d point,
osg::Node::NodeMask  traversalMask = 0xffffffff 
) [static]

Compute the vertical distance between the specified scene graph and a single HAT point.

void osgSim::HeightAboveTerrain::clearDatabaseCache (  )  [inline]

Clear the database cache.

void osgSim::HeightAboveTerrain::setDatabaseCacheReadCallback ( DatabaseCacheReadCallback dcrc  ) 

Set the ReadCallback that does the reading of external PagedLOD models, and caching of loaded subgraphs. Note, if you have multiple LineOfSight or HeightAboveTerrain objects in use at one time then you should share a single DatabaseCacheReadCallback between all of them.

DatabaseCacheReadCallback* osgSim::HeightAboveTerrain::getDatabaseCacheReadCallback (  )  [inline]

Get the ReadCallback that does the reading of external PagedLOD models, and caching of loaded subgraphs.


Member Data Documentation


The documentation for this class was generated from the following file:

Generated on Wed Nov 17 16:52:53 2010 for openscenegraph by  doxygen 1.5.6