ml::WEMGeometry Namespace Reference

Functions
MLWEM_EXPORT bool	isPointInsideWEMPatch (const Vector3 &position, WEMPatch *wemPatch)
MLWEM_EXPORT bool	isLineIntersectingFace (const Vector3 &startPos, const Vector3 &endPos, WEMFace *face, WEMPatch *wemPatch=nullptr)
	Returns whether the given line (from startPos to endPos) intersects the given WEMFace. The wemPatch parameter is not in use and per default NULL.
MLWEM_EXPORT bool	isLineIntersectingFace (Vector3 &intersectionPoint, const Vector3 &startPos, const Vector3 &endPos, WEMFace *face, WEMPatch *wemPatch=nullptr)
	Returns whether the given line (from startPos to endPos) intersects the given WEMFace and fills up the intersection point.
MLWEM_EXPORT bool	pointInsidePolygon (const Vector3 &point, const Vector3 *polygon, unsigned int numPoints)
MLWEM_EXPORT bool	isPointOnEdgeOrNode (const Vector3 &position, WEMFace *face)
	Returns whether the given point lies on any node or edge of the given face.
MLWEM_EXPORT bool	isPointOnFace (const Vector3 &position, WEMFace *face)
	Returns whether the given point lies on any face of the given face.
MLWEM_EXPORT bool	isPointInsideFace (const Vector3 &point, const WEMFace *face)
	Returns whether the given point is in the given face.
MLWEM_EXPORT bool	checkForEdgeNodeCrossing (const Vector3 &rayStart, const Vector3 &rayEnd, WEMFace *face)
	Returns whether the given ray crosses any edge or node of the given face.
MLWEM_EXPORT double	computeSegmentSegmentDistance (const Vector3 &start0, const Vector3 &end0, const Vector3 &start1, const Vector3 &end1, Vector3 &intersectionPoint)
	Returns the minimum distance between the two given segments. If this distance is 0, the intersectionPoint is valid.
MLWEM_EXPORT double	computePointSegmentDistance (const Vector3 &point, const Vector3 &segmentStart, const Vector3 &segmentEnd)
	Returns the shortest distance of a given point to a segment, given by its start and end point.
MLWEM_EXPORT double	computePointPlaneDistance (const Vector3 &point, const WEMFace *face)
	Returns the distance of the given point to a plane, defined by the WEMFace (first position and normal of the face).
MLWEM_EXPORT double	computePointTriangleDistance (const Vector3 &point, const WEMTriangle *triangle)
	Returns the distance of the given point to the given triangle.
bool	doLineSegmentsIntersect2D (const Vector2 &s1, const Vector2 &e1, const Vector2 &s2, const Vector2 &e2)
bool	isOnSegmentFor2DSegmentIntersectionTest (double xi, double yi, double xj, double yj, double xk, double yk)
char	computeDirectionFor2DSegmentIntersectionTest (double xi, double yi, double xj, double yj, double xk, double yk)

Detailed Description

Tool namespace for performing geometric operations on a WEMPatch. If you are looking for fast WEM ray intersection, have a look at the WEMBoundingVolumeHierarchy class in the MLWEMAcceleration project.

Function Documentation

checkForEdgeNodeCrossing()

MLWEM_EXPORT bool ml::WEMGeometry::checkForEdgeNodeCrossing	(	const Vector3 &	rayStart,
		const Vector3 &	rayEnd,
		WEMFace *	face )

Returns whether the given ray crosses any edge or node of the given face.

References checkForEdgeNodeCrossing(), and MLWEM_EXPORT.

Referenced by checkForEdgeNodeCrossing().

computeDirectionFor2DSegmentIntersectionTest()

char ml::WEMGeometry::computeDirectionFor2DSegmentIntersectionTest	(	double	xi,
		double	yi,
		double	xj,
		double	yj,
		double	xk,
		double	yk )

References computeDirectionFor2DSegmentIntersectionTest().

Referenced by computeDirectionFor2DSegmentIntersectionTest().

computePointPlaneDistance()

MLWEM_EXPORT double ml::WEMGeometry::computePointPlaneDistance	(	const Vector3 &	point,
		const WEMFace *	face )

Returns the distance of the given point to a plane, defined by the WEMFace (first position and normal of the face).

References computePointPlaneDistance(), and MLWEM_EXPORT.

Referenced by computePointPlaneDistance().

computePointSegmentDistance()

MLWEM_EXPORT double ml::WEMGeometry::computePointSegmentDistance	(	const Vector3 &	point,
		const Vector3 &	segmentStart,
		const Vector3 &	segmentEnd )

Returns the shortest distance of a given point to a segment, given by its start and end point.

References computePointSegmentDistance(), and MLWEM_EXPORT.

Referenced by computePointSegmentDistance().

computePointTriangleDistance()

MLWEM_EXPORT double ml::WEMGeometry::computePointTriangleDistance	(	const Vector3 &	point,
		const WEMTriangle *	triangle )

Returns the distance of the given point to the given triangle.

References computePointTriangleDistance(), and MLWEM_EXPORT.

Referenced by computePointTriangleDistance().

computeSegmentSegmentDistance()

MLWEM_EXPORT double ml::WEMGeometry::computeSegmentSegmentDistance	(	const Vector3 &	start0,
		const Vector3 &	end0,
		const Vector3 &	start1,
		const Vector3 &	end1,
		Vector3 &	intersectionPoint )

Returns the minimum distance between the two given segments. If this distance is 0, the intersectionPoint is valid.

References computeSegmentSegmentDistance(), and MLWEM_EXPORT.

Referenced by computeSegmentSegmentDistance().

doLineSegmentsIntersect2D()

bool ml::WEMGeometry::doLineSegmentsIntersect2D	(	const Vector2 &	s1,
		const Vector2 &	e1,
		const Vector2 &	s2,
		const Vector2 &	e2 )

References doLineSegmentsIntersect2D().

Referenced by doLineSegmentsIntersect2D().

isLineIntersectingFace() [1/2]

MLWEM_EXPORT bool ml::WEMGeometry::isLineIntersectingFace	(	const Vector3 &	startPos,
		const Vector3 &	endPos,
		WEMFace *	face,
		WEMPatch *	wemPatch = nullptr )

Returns whether the given line (from startPos to endPos) intersects the given WEMFace. The wemPatch parameter is not in use and per default NULL.

References isLineIntersectingFace(), and MLWEM_EXPORT.

Referenced by isLineIntersectingFace(), and isLineIntersectingFace().

isLineIntersectingFace() [2/2]

MLWEM_EXPORT bool ml::WEMGeometry::isLineIntersectingFace	(	Vector3 &	intersectionPoint,
		const Vector3 &	startPos,
		const Vector3 &	endPos,
		WEMFace *	face,
		WEMPatch *	wemPatch = nullptr )

Returns whether the given line (from startPos to endPos) intersects the given WEMFace and fills up the intersection point.

References isLineIntersectingFace(), and MLWEM_EXPORT.

isOnSegmentFor2DSegmentIntersectionTest()

bool ml::WEMGeometry::isOnSegmentFor2DSegmentIntersectionTest	(	double	xi,
		double	yi,
		double	xj,
		double	yj,
		double	xk,
		double	yk )

References isOnSegmentFor2DSegmentIntersectionTest().

Referenced by isOnSegmentFor2DSegmentIntersectionTest().

isPointInsideFace()

MLWEM_EXPORT bool ml::WEMGeometry::isPointInsideFace	(	const Vector3 &	point,
		const WEMFace *	face )

Returns whether the given point is in the given face.

References isPointInsideFace(), and MLWEM_EXPORT.

Referenced by isPointInsideFace().

isPointInsideWEMPatch()

MLWEM_EXPORT bool ml::WEMGeometry::isPointInsideWEMPatch	(	const Vector3 &	position,
		WEMPatch *	wemPatch )

Returns whether the given point is inside the given WEMPatch. A point is considered to be inside if it lies exactly on a node, edge, or face.

References isPointInsideWEMPatch(), and MLWEM_EXPORT.

Referenced by isPointInsideWEMPatch().

isPointOnEdgeOrNode()

MLWEM_EXPORT bool ml::WEMGeometry::isPointOnEdgeOrNode	(	const Vector3 &	position,
		WEMFace *	face )

Returns whether the given point lies on any node or edge of the given face.

References isPointOnEdgeOrNode(), and MLWEM_EXPORT.

Referenced by isPointOnEdgeOrNode().

isPointOnFace()

MLWEM_EXPORT bool ml::WEMGeometry::isPointOnFace	(	const Vector3 &	position,
		WEMFace *	face )

Returns whether the given point lies on any face of the given face.

References isPointOnFace(), and MLWEM_EXPORT.

Referenced by isPointOnFace().

pointInsidePolygon()

MLWEM_EXPORT bool ml::WEMGeometry::pointInsidePolygon	(	const Vector3 &	point,
		const Vector3 *	polygon,
		unsigned int	numPoints )

Returns whether the given point lies inside the polygon, given by the list of points. Both, the point and the polygon, must be projected onto the x-y plane before.

References MLWEM_EXPORT, and pointInsidePolygon().

Referenced by pointInsidePolygon().