osgSim::LineOfSight Class Reference

#include <LineOfSight.h>

Collaboration diagram for osgSim::LineOfSight:

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. By default assigns a osgSim::DatabaseCacheReadCallback that enables automatic loading of external PagedLOD tiles to ensure that the highest level of detail is used in intersections. This automatic loading of tiles is done by the intersection traversal that is done within the computeIntersections(..) method, so can result in long intersection times when external tiles have to be loaded. The external loading of tiles can be disabled by removing the read callback, this is done by calling the setDatabaseCacheReadCallback(DatabaseCacheReadCallback*) method with a value of 0.

Definition at line 54 of file LineOfSight.h.

Member Typedef Documentation

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

Definition at line 81 of file LineOfSight.h.

typedef std::vector<LOS> osgSim::LineOfSight::LOSList

protected

Definition at line 119 of file LineOfSight.h.

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.

Definition at line 95 of file LineOfSight.h.

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.

Definition at line 103 of file LineOfSight.h.

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

inline

Get the end point of single line of sight test.

Definition at line 79 of file LineOfSight.h.

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

inline

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

Definition at line 84 of file LineOfSight.h.

unsigned int osgSim::LineOfSight::getNumLOS ( ) const

inline

Get the number of line of sight tests.

Definition at line 67 of file LineOfSight.h.

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

inline

Get the start point of single line of sight test.

Definition at line 73 of file LineOfSight.h.

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.

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

inline

Set the end point of single line of sight test.

Definition at line 76 of file LineOfSight.h.

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

inline

Set the start point of single line of sight test.

Definition at line 70 of file LineOfSight.h.

Member Data Documentation

osg::ref_ptr<DatabaseCacheReadCallback> osgSim::LineOfSight::_dcrc

protected

Definition at line 122 of file LineOfSight.h.

osgUtil::IntersectionVisitor osgSim::LineOfSight::_intersectionVisitor

protected

Definition at line 123 of file LineOfSight.h.

LOSList osgSim::LineOfSight::_LOSList

protected

Definition at line 120 of file LineOfSight.h.

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

• osg_head/include/osgSim/LineOfSight.h