Classes
struct	LOS
Public Types
typedef std::vector< osg::Vec3d >	Intersections
Public Member Functions
	LineOfSight ()
void	clear ()
unsigned int	addLOS (const osg::Vec3d &start, const osg::Vec3d &end)
unsigned int	getNumLOS () const
void	setStartPoint (unsigned int i, const osg::Vec3d &start)
const osg::Vec3d &	getStartPoint (unsigned int i) const
void	setEndPoint (unsigned int i, const osg::Vec3d &end)
const osg::Vec3d &	getEndPoint (unsigned int i) const
const Intersections &	getIntersections (unsigned int i) const
void	computeIntersections (osg::Node *scene, osg::Node::NodeMask traversalMask=0xffffffff)
void	clearDatabaseCache ()
void	setDatabaseCacheReadCallback (DatabaseCacheReadCallback *dcrc)
DatabaseCacheReadCallback *	getDatabaseCacheReadCallback ()
Static Public Member Functions
static Intersections	computeIntersections (osg::Node *scene, const osg::Vec3d &start, const osg::Vec3d &end, osg::Node::NodeMask traversalMask=0xffffffff)
Protected Types
typedef std::vector< LOS >	LOSList
Protected Attributes
LOSList	_LOSList
osg::ref_ptr < DatabaseCacheReadCallback >	_dcrc
osgUtil::IntersectionVisitor	_intersectionVisitor

Detailed Description

Helper class for setting up and acquiring line of sight intersections with terrain. Supports automatic paging in of PagedLOD tiles.

Member Typedef Documentation

typedef std::vector<osg::Vec3d> osgSim::LineOfSight::Intersections

typedef std::vector<LOS> osgSim::LineOfSight::LOSList [protected]

Constructor & Destructor Documentation

osgSim::LineOfSight::LineOfSight ( )

Member Function Documentation

unsigned int osgSim::LineOfSight::addLOS	(	const osg::Vec3d &	start,
		const osg::Vec3d &	end
	)

Add a line of sight test, consisting of start and end point. Returns the index number of the newly adding LOS test.

void osgSim::LineOfSight::clear ( )

Clear the internal LOS List so it contains no line of sight tests.

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

Clear the database cache.

void osgSim::LineOfSight::computeIntersections	(	osg::Node *	scene,
		osg::Node::NodeMask	traversalMask = `0xffffffff`
	)

Compute the LOS intersections with the specified scene graph. The results are all stored in the form of Intersections list, one per LOS test.

static Intersections osgSim::LineOfSight::computeIntersections	(	osg::Node *	scene,
		const osg::Vec3d &	start,
		const osg::Vec3d &	end,
		osg::Node::NodeMask	traversalMask = `0xffffffff`
	)			`[static]`

Compute the intersection between the specified scene graph and a single LOS start,end pair. Returns an IntersectionList, of all the points intersected.

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

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

const osg::Vec3d& osgSim::LineOfSight::getEndPoint ( unsigned int i ) const [inline]

Get the end point of single line of sight test.

const Intersections& osgSim::LineOfSight::getIntersections ( unsigned int i ) const [inline]

Get the intersection points for a single line of sight test.

unsigned int osgSim::LineOfSight::getNumLOS ( ) const [inline]

Get the number of line of sight tests.

const osg::Vec3d& osgSim::LineOfSight::getStartPoint ( unsigned int i ) const [inline]

Get the start point of single line of sight test.

void osgSim::LineOfSight::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.