Public API Reference

csIntersect2 Class Reference
[Geometry utilities]

Some functions to perform various intersection calculations with 2D line segments. More...

#include <csgeom/math2d.h>

List of all members.

Static Public Member Functions
static bool	LineLine (const csSegment2 &a, const csSegment2 &b, csVector2 &isect)
	Compute the intersection of 2D lines.
static bool	PlanePlane (const csPlane2 &p1, const csPlane2 &p2, csVector2 &isect)
	Intersect 2 planes to get the point that is part of all two planes.
static bool	PlanePolygon (const csPlane2 &plane, csPoly2D *poly, csSegment2 &segment)
	Intersect a plane with a 2D polygon and return the line segment corresponding with this intersection.
static bool	SegmentLine (const csSegment2 &a, const csSegment2 &b, csVector2 &isect, float &dist)
	Compute the intersection of a 2D segment and a line.
static bool	SegmentPlane (const csSegment2 &uv, const csPlane2 &p, csVector2 &isect, float &dist)
	Intersect a 2D segment with a plane.
static bool	SegmentPlane (const csVector2 &u, const csVector2 &v, const csPlane2 &p, csVector2 &isect, float &dist)
	Intersect a 2D segment with a plane.
static void	SegmentPlaneNoTest (const csSegment2 &uv, const csPlane2 &p, csVector2 &isect, float &dist)
	Return the intersection point.
static void	SegmentPlaneNoTest (const csVector2 &u, const csVector2 &v, const csPlane2 &p, csVector2 &isect, float &dist)
	Return the intersection point.
static bool	SegmentSegment (const csSegment2 &a, const csSegment2 &b, csVector2 &isect, float &dist)
	Compute the intersection of the 2D segments.

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Detailed Description

Some functions to perform various intersection calculations with 2D line segments.

This is a static class and contains only static member functions.

Definition at line 157 of file math2d.h.

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Member Function Documentation

static bool csIntersect2::LineLine	(	const csSegment2 &	a,
		const csSegment2 &	b,
		csVector2 &	isect
	)			[static]

Compute the intersection of 2D lines.

Returns:

true if they intersect, with the intersection point returned in isect.

static bool csIntersect2::PlanePlane	(	const csPlane2 &	p1,
		const csPlane2 &	p2,
		csVector2 &	isect
	)			[static]

Intersect 2 planes to get the point that is part of all two planes.

Returns:

true if there is a single point that fits. If the planes are parallel, then it will return false.

static bool csIntersect2::PlanePolygon	(	const csPlane2 &	plane,
		csPoly2D *	poly,
		csSegment2 &	segment
	)			[static]

Intersect a plane with a 2D polygon and return the line segment corresponding with this intersection.

Returns:

true if there is an intersection. If false then 'segment' will not be valid.

static bool csIntersect2::SegmentLine	(	const csSegment2 &	a,
		const csSegment2 &	b,
		csVector2 &	isect,
		float &	dist
	)			[static]

Compute the intersection of a 2D segment and a line.

Returns:

true if they intersect, with the intersection point returned in isect, and the distance from a1 of the intersection in dist.

static bool csIntersect2::SegmentPlane	(	const csSegment2 &	uv,
		const csPlane2 &	p,
		csVector2 &	isect,
		float &	dist
	)			[inline, static]

Intersect a 2D segment with a plane.

Returns:

true if there is an intersection, with the intersection point returned in isect. The distance from u to the intersection point is returned in dist. The distance that is returned is a normalized distance with respect to the given input vector. i.e. a distance of 0.5 means that the intersection point is halfway u and v.

Definition at line 224 of file math2d.h.

References csSegment2::End(), and csSegment2::Start().

static bool csIntersect2::SegmentPlane	(	const csVector2 &	u,
		const csVector2 &	v,
		const csPlane2 &	p,
		csVector2 &	isect,
		float &	dist
	)			[static]

Intersect a 2D segment with a plane.

Returns:

true if there is an intersection, with the intersection point returned in isect. The distance from u to the intersection point is returned in dist. The distance that is returned is a normalized distance with respect to the given input vector. i.e. a distance of 0.5 means that the intersection point is halfway u and v.

static void csIntersect2::SegmentPlaneNoTest	(	const csSegment2 &	uv,
		const csPlane2 &	p,
		csVector2 &	isect,
		float &	dist
	)			[inline, static]

Return the intersection point.

This version does not test if there really is an intersection. It just assumes there is one.

Definition at line 251 of file math2d.h.

References csSegment2::End(), and csSegment2::Start().

static void csIntersect2::SegmentPlaneNoTest	(	const csVector2 &	u,
		const csVector2 &	v,
		const csPlane2 &	p,
		csVector2 &	isect,
		float &	dist
	)			[inline, static]

Return the intersection point.

This version does not test if there really is an intersection. It just assumes there is one.

Definition at line 237 of file math2d.h.

References csPlane2::CC, csPlane2::norm, csVector2::x, and csVector2::y.

static bool csIntersect2::SegmentSegment	(	const csSegment2 &	a,
		const csSegment2 &	b,
		csVector2 &	isect,
		float &	dist
	)			[static]

Compute the intersection of the 2D segments.

Returns:

true if they intersect, with the intersection point returned in isect, and the distance from a1 of the intersection in dist.

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

• csgeom/math2d.h

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