This class services DtTerrainReasoner. It contains actual implementations of the algorithms used for both hilltops finding and position finding. DtTerrainReasoner provides a client oriented interface: based on local coordinates and double precision range/height measurements. DtTerrainReasonerAlgos is implementation oriented: uses topographic coordinates and integer values (where applicable) for simplicity and efficiency.

Static Public Member Functions
static bool	SolveHilltops (const DtIntMatrix &grid, int prominenceSpan, int prominence, vector< int > &hilltopX, vector< int > &hilltopY, vector< int > &groupIndex)

static void	LocatePositions (const DtArea &area, int sampleFactor, const DtTopoPoint &domPoint, int posCount, int lateralSpacing, int lateralInterval, int lateralRange, int metersFire, int metersCover, int interval, double heightFire, double heightCover, double heightTo, double maxSlopeDegrees, const DtHostQueryInterface &losChecker, vector< DtTopoPoint > &samplePoints, vector< DtGradeResult > &fireResult, vector< DtGradeResult > &coverResult)

static double	GradeCoverage (const DtTopoPoint &pointFrom, double heightFrom, const vector< DtTopoPoint > &samplePoints, double heightTo, const DtHostQueryInterface &losChecker, vector< bool > &covered)

static void	SelectGrades (vector< int > &grades, int selectCount, int spacing, vector< int > &selected)

static void	FindPotentialPositionsAlongCrossSection (const DtTopoPoint &originPoint, double originHeightMeters, const DtTopoPoint &endPoint, double startCheckOffsetMeters, double startSearchOffsetMeters, double searchIntervalMeters, double viewHeightMeters, double coverHeightMeters, double coverRangeMeters, const DtHostQueryInterface &losChecker, vector< DtTopoPoint > &viewPoints, vector< DtTopoPoint > &coverPoints)

static void	FindPotentialPositionsInArea (const DtArea &searchArea, const DtArea &targetsArea, unsigned int targetsAreaSampleCount, double lateralIntervalMeters, double verticalIntervalMeters, double targetHeightMeters, double viewHeightMeters, double coverHeightMeters, double coverRangeMeters, const DtHostQueryInterface &losChecker, DtTopoPoint &targetAreaCenter, vector< DtTopoPoint > &viewPoints, vector< DtTopoPoint > &coverPoints)

static void	ClusterPotentialPositions (const DtTopoPoint &targetCenter, const vector< DtTopoPoint > &viewPoints, const vector< DtTopoPoint > &coverPoints, double maxGroupWidth, double maxGroupDepth, vector< DtArea > &clusters, vector< DtTopoPoint > &clusterCenters, vector< double > &clusterDepths, vector< double > &clusterWidths)

Static Private Member Functions
static void	ConvertAreasToCrossSections (const DtArea &searchArea, const DtArea &targetsArea, unsigned int targetsAreaSampleCount, double lateralIntervalMeters, DtTopoPoint &originPoint, vector< double > &startCheckOffsetMeters, vector< double > &startSearchOffsetMeters, const DtHostQueryInterface &losChecker, vector< DtTopoPoint > &endPoints)

static bool	PointInside (const DtTopoPoint &pt, const DtTopoPoint &fromP, const DtTopoPoint &toP)

static bool	LineIntersection (const DtTopoPoint &from1, const DtTopoPoint &to1, const DtTopoPoint &from2, const DtTopoPoint &to2, DtTopoPoint &intersection)

static void	LineAreaIntersection (const DtTopoPoint &fromLine, const DtTopoPoint &toLine, DtArea area, vector< DtTopoPoint > &intersectionVec)

static int	ProminenceCircle (int radius, DtIntMatrix &circle)

static void	FindPeaks (const DtIntMatrixSlice &slice, vector< int > &indices)

static void	GradeSinglePosition (const vector< DtTopoPoint > &samplePoints, const DtTopoPoint &areaCenter, const DtTopoPoint &position, int metersFire, int metersCover, int interval, double heightFire, double heightCover, double heightTo, double maxSlopeDegrees, const DtHostQueryInterface &_losChecker, DtGradeResult &fireResult, DtGradeResult &coverResult)

static void	SelectGradesImp (vector< int > &grades, int fromInd, int toInd, vector< int > &indices, int top, int selectCount, int spacing, vector< int > &selected)

Friends
class	DtTerrainReasonerTester

Member Function Documentation

static bool DtTerrainReasonerAlgos::SolveHilltops	(	const DtIntMatrix &	grid,
		int	prominenceSpan,
		int	prominence,
		vector< int > &	hilltopX,
		vector< int > &	hilltopY,
		vector< int > &	groupIndex
	)

static

This algorithm serves DtTerrainReasoner::findHilltopsInArea.

static void DtTerrainReasonerAlgos::LocatePositions	(	const DtArea &	area,
		int	sampleFactor,
		const DtTopoPoint &	domPoint,
		int	posCount,
		int	lateralSpacing,
		int	lateralInterval,
		int	lateralRange,
		int	metersFire,
		int	metersCover,
		int	interval,
		double	heightFire,
		double	heightCover,
		double	heightTo,
		double	maxSlopeDegrees,
		const DtHostQueryInterface &	losChecker,
		vector< DtTopoPoint > &	samplePoints,
		vector< DtGradeResult > &	fireResult,
		vector< DtGradeResult > &	coverResult
	)

static

This algorithm serves DtTerrainReasoner::findPositionGroup.

static double DtTerrainReasonerAlgos::GradeCoverage	(	const DtTopoPoint &	pointFrom,
		double	heightFrom,
		const vector< DtTopoPoint > &	samplePoints,
		double	heightTo,
		const DtHostQueryInterface &	losChecker,
		vector< bool > &	covered
	)

static

This algorithm grades an exampned view/cover point based on its coverage of (i.e. line-of-sight to) a collection of sample points.

static void DtTerrainReasonerAlgos::SelectGrades	(	vector< int > &	grades,
		int	selectCount,
		int	spacing,
		vector< int > &	selected
	)

static

static void DtTerrainReasonerAlgos::FindPotentialPositionsAlongCrossSection	(	const DtTopoPoint &	originPoint,
		double	originHeightMeters,
		const DtTopoPoint &	endPoint,
		double	startCheckOffsetMeters,
		double	startSearchOffsetMeters,
		double	searchIntervalMeters,
		double	viewHeightMeters,
		double	coverHeightMeters,
		double	coverRangeMeters,
		const DtHostQueryInterface &	losChecker,
		vector< DtTopoPoint > &	viewPoints,
		vector< DtTopoPoint > &	coverPoints
	)

static

This algorithm finds all potential positions along a cross section. A cross section is a line that starts at an originPoint and ends in an endPoint. A potential position is a pair of view point and cover point that are found using elevation comparisons only, i.e. without using true line-of-sight checks. This algorithm serves FindPotentialPositionsInArea.

static void DtTerrainReasonerAlgos::FindPotentialPositionsInArea	(	const DtArea &	searchArea,
		const DtArea &	targetsArea,
		unsigned int	targetsAreaSampleCount,
		double	lateralIntervalMeters,
		double	verticalIntervalMeters,
		double	targetHeightMeters,
		double	viewHeightMeters,
		double	coverHeightMeters,
		double	coverRangeMeters,
		const DtHostQueryInterface &	losChecker,
		DtTopoPoint &	targetAreaCenter,
		vector< DtTopoPoint > &	viewPoints,
		vector< DtTopoPoint > &	coverPoints
	)

static

This algorithm serves DtTerrainReasoner::findRidgedPositionsInArea. It implements the first part of the heuristic stage: finding all potential positions in the specified searchArea.

static void DtTerrainReasonerAlgos::ClusterPotentialPositions	(	const DtTopoPoint &	targetCenter,
		const vector< DtTopoPoint > &	viewPoints,
		const vector< DtTopoPoint > &	coverPoints,
		double	maxGroupWidth,
		double	maxGroupDepth,
		vector< DtArea > &	clusters,
		vector< DtTopoPoint > &	clusterCenters,
		vector< double > &	clusterDepths,
		vector< double > &	clusterWidths
	)

static

This algorithm serves DtTerrainReasoner::findRidgedPositionsInArea. It implements the second part of the heuristic stage: clustering all previously found potential positions into rectangular clusters/groups of limited dimensions.

static void DtTerrainReasonerAlgos::ConvertAreasToCrossSections	(	const DtArea &	searchArea,
		const DtArea &	targetsArea,
		unsigned int	targetsAreaSampleCount,
		double	lateralIntervalMeters,
		DtTopoPoint &	originPoint,
		vector< double > &	startCheckOffsetMeters,
		vector< double > &	startSearchOffsetMeters,
		const DtHostQueryInterface &	losChecker,
		vector< DtTopoPoint > &	endPoints
	)

staticprivate

This algorithm finds a "fan" of cross sections. Each cross section starts at an originPoint (also an out parameter) and extends to the far end of the search area. The originPoint (AKA reference point) is set to the center of the targetsArea and its elevation is set to the avarage elevation in the targetsArea. The density of the "fan" is determined by lateralIntervalMeters, applied to the farthest edge of the search area.

static bool DtTerrainReasonerAlgos::PointInside	(	const DtTopoPoint &	pt,
		const DtTopoPoint &	fromP,
		const DtTopoPoint &	toP
	)

staticprivate

This group of methods provide some basic geometric operations.

static bool DtTerrainReasonerAlgos::LineIntersection	(	const DtTopoPoint &	from1,
		const DtTopoPoint &	to1,
		const DtTopoPoint &	from2,
		const DtTopoPoint &	to2,
		DtTopoPoint &	intersection
	)

staticprivate

static void DtTerrainReasonerAlgos::LineAreaIntersection	(	const DtTopoPoint &	fromLine,
		const DtTopoPoint &	toLine,
		DtArea	area,
		vector< DtTopoPoint > &	intersectionVec
	)

staticprivate

static int DtTerrainReasonerAlgos::ProminenceCircle	(	int	radius,
		DtIntMatrix &	circle
	)

staticprivate

This method create a square matrix in which all cells belonging to a circle whose center is the center of the square and whose radius is specified, are marked. This is used to efficiently identify all grid cells belonging to the prominence circle of a hilltop, while traversing the search area.

static void DtTerrainReasonerAlgos::FindPeaks	(	const DtIntMatrixSlice &	slice,
		vector< int > &	indices
	)

staticprivate

static void DtTerrainReasonerAlgos::GradeSinglePosition	(	const vector< DtTopoPoint > &	samplePoints,
		const DtTopoPoint &	areaCenter,
		const DtTopoPoint &	position,
		int	metersFire,
		int	metersCover,
		int	interval,
		double	heightFire,
		double	heightCover,
		double	heightTo,
		double	maxSlopeDegrees,
		const DtHostQueryInterface &	_losChecker,
		DtGradeResult &	fireResult,
		DtGradeResult &	coverResult
	)

staticprivate

static void DtTerrainReasonerAlgos::SelectGradesImp	(	vector< int > &	grades,
		int	fromInd,
		int	toInd,
		vector< int > &	indices,
		int	top,
		int	selectCount,
		int	spacing,
		vector< int > &	selected
	)

staticprivate

Friends And Related Function Documentation

friend class DtTerrainReasonerTester

friend

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

/data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-0-branch/include/terrainReasoning/terrainReasonerAlgos.h

Static Public Member Functions

Static Private Member Functions

Friends

Member Function Documentation

Friends And Related Function Documentation