osgSim::LineOfSight Class Reference

Helper class for setting up and aquiring line of sight intersections with terrain. More...

List of all members.

Public Types
typedef std::vector < osg::Vec3d >	Intersections
Public Member Functions
	LineOfSight ()
void	clear ()
	Clear the internal LOS List so it contains no line of sight tests.
unsigned int	addLOS (const osg::Vec3d &start, const osg::Vec3d &end)
	Add a line of sight test, consisting of start and end point.
unsigned int	getNumLOS () const
	Get the number of line of sight tests.
void	setStartPoint (unsigned int i, const osg::Vec3d &start)
	Set the start point of signel line of sight test.
const osg::Vec3d &	getStartPoint (unsigned int i) const
	Get the start point of single line of sight test.
void	setEndPoint (unsigned int i, const osg::Vec3d &end)
	Set the end point of single line of sight test.
const osg::Vec3d &	getEndPoint (unsigned int i) const
	Get the end point of single line of sight test.
const Intersections &	getIntersections (unsigned int i) const
	Get the intersection points for a single line of sight test.
void	computeIntersections (osg::Node *scene, osg::Node::NodeMask traversalMask=0xffffffff)
	Compute the LOS intersections with the specified scene graph.
void	clearDatabaseCache ()
	Clear the database cache.
void	setDatabaseCacheReadCallback (DatabaseCacheReadCallback *dcrc)
	Set the ReadCallback that does the reading of external PagedLOD models, and caching of loaded subgraphs.
DatabaseCacheReadCallback *	getDatabaseCacheReadCallback ()
	Get the ReadCallback that does the reading of external PagedLOD models, and caching of loaded subgraphs.
Static Public Member Functions
static Intersections	computeIntersections (osg::Node *scene, const osg::Vec3d &start, const osg::Vec3d &end, osg::Node::NodeMask traversalMask=0xffffffff)
	Compute the intersection between the specified scene graph and a single LOS start,end pair.
Protected Types
typedef std::vector < LOS >	LOSList
Protected Attributes
LOSList	_LOSList
osg::ref_ptr < DatabaseCacheReadCallback >	_dcrc
osgUtil::IntersectionVisitor	_intersectionVisitor
Classes
struct	LOS

---

Detailed Description

Helper class for setting up and aquiring 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

void osgSim::LineOfSight::clear

(

)

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

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.

unsigned int osgSim::LineOfSight::getNumLOS

(

)

const [inline]

Get the number of line of sight tests.

void osgSim::LineOfSight::setStartPoint	(	unsigned int	i,
		const osg::Vec3d &	start
	)			[inline]

Set the start point of signel line of sight test.

const osg::Vec3d& osgSim::LineOfSight::getStartPoint

(

unsigned int

i

)

const [inline]

Get the start point of single line of sight test.

void osgSim::LineOfSight::setEndPoint	(	unsigned int	i,
		const osg::Vec3d &	end
	)			[inline]

Set the end point of single line of sight test.

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.

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.

void osgSim::LineOfSight::clearDatabaseCache

(

)

[inline]

Clear the database cache.

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 mulitple LineOfSight or HeightAboveTerrain objects in use at one time then you should share a single DatabaseCacheReadCallback between all of them.

DatabaseCacheReadCallback* osgSim::LineOfSight::getDatabaseCacheReadCallback

(

)

[inline]

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

---

Member Data Documentation

LOSList osgSim::LineOfSight::_LOSList [protected]

osg::ref_ptr<DatabaseCacheReadCallback> osgSim::LineOfSight::_dcrc [protected]

osgUtil::IntersectionVisitor osgSim::LineOfSight::_intersectionVisitor [protected]

---

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

• LineOfSight

---