csIntersect3 Class Reference
[Geometry utilities]
Some functions to perform various intersection calculations with 3D line segments.
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#include <csgeom/math3d.h>
Static Public Member Functions | |
bool | PlanePolygon (const csPlane3 &plane, csPoly3D *poly, csSegment3 &segment) |
Intersect a plane with a 3D polygon and return the line segment corresponding with this intersection. | |
int | SegmentFrustum (csPlane3 *planes, int num_planes, csSegment3 &seg) |
Intersect a segment with a frustum (given as a set of planes). | |
bool | SegmentTriangle (const csSegment3 &seg, const csVector3 &tr1, const csVector3 &tr2, const csVector3 &tr3, csVector3 &isect) |
Intersect a 3D segment with a triangle. | |
bool | SegmentPolygon (const csSegment3 &seg, const csPoly3D &poly, const csPlane3 &poly_plane, csVector3 &isect) |
Intersect a 3D segment with a polygon. | |
bool | SegmentPlanes (const csVector3 &u, const csVector3 &v, const csPlane3 *planes, int length, csVector3 &isect, float &dist) |
If a number of planes enclose a convex space (with their normals pointing outwards). | |
bool | SegmentPlane (const csVector3 &u, const csVector3 &v, const csVector3 &normal, const csVector3 &a, csVector3 &isect, float &dist) |
Intersect a 3D segment with a plane. | |
bool | SegmentPlane (const csVector3 &u, const csVector3 &v, const csPlane3 &p, csVector3 &isect, float &dist) |
Intersect a 3D segment with a plane. | |
bool | ThreePlanes (const csPlane3 &p1, const csPlane3 &p2, const csPlane3 &p3, csVector3 &isect) |
Intersect 3 planes to get the point that is part of all three planes. | |
bool | PlaneXPlane (const csPlane3 &p1, float x2, csPlane2 &isect) |
Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. | |
bool | PlaneYPlane (const csPlane3 &p1, float y2, csPlane2 &isect) |
Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. | |
bool | PlaneZPlane (const csPlane3 &p1, float z2, csPlane2 &isect) |
Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. | |
bool | PlaneAxisPlane (const csPlane3 &p1, int nr, float pos, csPlane2 &isect) |
Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. | |
float | SegmentZ0Plane (const csVector3 &v1, const csVector3 &v2, csVector3 &isect) |
Intersect a 3D segment with the z = 0 plane. | |
float | SegmentZ0Plane (const csSegment3 &uv, csVector3 &isect) |
Intersect a 3D segment with the z = 0 plane. | |
float | SegmentXPlane (const csVector3 &u, const csVector3 &v, float xval, csVector3 &isect) |
Intersect a 3D segment with the plane x = xval. | |
float | SegmentXPlane (const csSegment3 &uv, float xval, csVector3 &isect) |
Intersect a 3D segment with the plane x = xval. | |
float | SegmentYPlane (const csVector3 &u, const csVector3 &v, float yval, csVector3 &isect) |
Intersect a 3D segment with the plane y = yval. | |
float | SegmentYPlane (const csSegment3 &uv, float yval, csVector3 &isect) |
Intersect a 3D segment with the plane y = yval. | |
float | SegmentZPlane (const csVector3 &u, const csVector3 &v, float zval, csVector3 &isect) |
Intersect a 3D segment with the plane z = zval. | |
float | SegmentZPlane (const csSegment3 &uv, float zval, csVector3 &isect) |
Intersect a 3D segment with the plane z = zval. | |
float | SegmentAxisPlane (const csVector3 &u, const csVector3 &v, int nr, float pos, csVector3 &isect) |
Intersect a 3D segment with an axis aligned plane and return the intersection (fails if segment is parallel to the plane), and returns the distance from u to the intersection point. | |
float | SegmentXFrustum (const csVector3 &u, const csVector3 &v, float A, csVector3 &isect) |
Intersect a 3D segment with the frustum plane Ax + z = 0. | |
float | SegmentXFrustum (const csSegment3 &uv, float A, csVector3 &isect) |
Intersect a 3D segment with the frustum plane Ax + z = 0. | |
float | SegmentYFrustum (const csVector3 &u, const csVector3 &v, float B, csVector3 &isect) |
Intersect a 3D segment with the frustum plane By + z = 0. | |
float | SegmentYFrustum (const csSegment3 &uv, float B, csVector3 &isect) |
Intersect a 3D segment with the frustum plane By + z = 0. | |
int | BoxSegment (const csBox3 &box, const csSegment3 &segment, csVector3 &isect, float *pr=0) |
Intersect a segment with a box and returns one of CS_BOX_SIDE_... | |
bool | BoxFrustum (const csBox3 &box, csPlane3 *frustum, uint32 inClipMask, uint32 &outClipMask) |
Intersect an AABB with a frustum. | |
bool | BoxSphere (const csBox3 &box, const csVector3 ¢er, float sqradius) |
Test if a box intersects with a sphere. | |
bool | BoxPlane (const csBox3 &box, const csPlane3 &plane) |
Test if a plane intersects with a box. | |
bool | BoxPlane (const csBox3 &box, const csVector3 &normal, const csVector3 &vert) |
Test if a plane intersects with a box. | |
bool | BoxTriangle (const csBox3 &box, const csVector3 &tri0, const csVector3 &tri1, const csVector3 &tri2) |
Test if a triangle intersects with a box. | |
bool | BoxBox (const csBox3 &box1, const csBox3 &box2) |
Test if two boxes intersect. | |
csPtr< csFrustum > | FrustumFrustum (const csFrustum &f1, const csFrustum &f2) |
Calculate intersection of two frustums. | |
csPtr< csFrustum > | FrustumFrustum (const csFrustum &f1, csVector3 *poly, int num) |
Calculate intersection of two frustums. |
Detailed Description
Some functions to perform various intersection calculations with 3D line segments.This is a static class and contains only static member functions.
Definition at line 271 of file math3d.h.
Member Function Documentation
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Test if two boxes intersect.
Definition at line 619 of file math3d.h. References csBox3::TestIntersect(). |
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Intersect an AABB with a frustum. The frustum may contain up to 32 planes. Active planes are defined using the 'inClipMask'. It will return true if AABB is visible in frustum. If the AABB intersects with the frustum then 'outClipMask' will contain the mask for all planes intersecting with the AABB. This can be used as 'inClipMask' for subsequent frustum tests with children of the AABB (i.e. other AABB inside this AABB). |
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Test if a plane intersects with a box. 'vert' is one point on the plane. |
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Test if a plane intersects with a box.
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Intersect a segment with a box and returns one of CS_BOX_SIDE_... if it intersects, CS_BOX_INSIDE if inside, or -1 otherwise. The intersection point is also returned. If 'pr' is given then a number between 0 and 1 is returned which corresponds to the position on the segment. If we were in the box this this function will return CS_BOX_INSIDE. In this case 'isect' will be set to the start of the segment and *pr to 0. |
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Test if a box intersects with a sphere. The intersection is not computed. The sphere is given with squared radius. |
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Test if a triangle intersects with a box.
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Calculate intersection of two frustums.
Definition at line 636 of file math3d.h. References csFrustum::Intersect(). |
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Calculate intersection of two frustums.
Definition at line 627 of file math3d.h. References csFrustum::Intersect(). |
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Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. This intersection is defined on the axis aligned plane. Returns false if there is no intersection. Definition at line 405 of file math3d.h. References PlaneXPlane(), PlaneYPlane(), and PlaneZPlane(). |
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Intersect a plane with a 3D 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. |
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Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. This intersection is defined on the axis aligned plane. Returns false if there is no intersection. Referenced by PlaneAxisPlane(). |
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Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. This intersection is defined on the axis aligned plane. Returns false if there is no intersection. Referenced by PlaneAxisPlane(). |
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Intersect a regular plane and an axis aligned plane and return the intersection (line) as a 2D plane. This intersection is defined on the axis aligned plane. Returns false if there is no intersection. Referenced by PlaneAxisPlane(). |
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Intersect a 3D segment with an axis aligned plane and return the intersection (fails if segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Definition at line 521 of file math3d.h. References SegmentXPlane(), SegmentYPlane(), and SegmentZPlane(). |
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Intersect a segment with a frustum (given as a set of planes). Returns the clipped segment (i.e. the part of the segment that is visible in the frustum). Returns -1 if the segment is entirely outside the frustum. Returns 0 if the segment is not modified and returns 1 otherwise. The input segment will be modified. @@ WARNING! This function may not work completely ok. It has only barely been tested and is now unused. |
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Intersect a 3D 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. There are two cases in which this method will return false:
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Intersect a 3D segment with a plane. Returns true if there is an intersection, with the intersection point returned in isect. |
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If a number of planes enclose a convex space (with their normals pointing outwards). This method returns true if they are intersected by a segment. isect contains the closest intersection point. dist contains the distance to that point (with distance between u and v being 1) |
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Intersect a 3D segment with a polygon. Returns true if there is an intersection. In that case the intersection point will be in 'isect'. Note that this function doesn't do backface culling. |
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Intersect a 3D segment with a triangle. Returns true if there is an intersection. In that case the intersection point will be in 'isect'. |
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Intersect a 3D segment with the frustum plane Ax + z = 0. Assumes an intersection, and returns the intersection point in isect. Definition at line 544 of file math3d.h. References csSegment3::End(), SegmentXFrustum(), and csSegment3::Start(). |
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Intersect a 3D segment with the frustum plane Ax + z = 0. Assumes an intersection, and returns the intersection point in isect. Referenced by SegmentXFrustum(). |
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Intersect a 3D segment with the plane x = xval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Definition at line 457 of file math3d.h. References csSegment3::End(), SegmentXPlane(), and csSegment3::Start(). |
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Intersect a 3D segment with the plane x = xval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Referenced by SegmentAxisPlane(), and SegmentXPlane(). |
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Intersect a 3D segment with the frustum plane By + z = 0. Assumes an intersection, and returns the intersection point in isect. Definition at line 561 of file math3d.h. References csSegment3::End(), SegmentYFrustum(), and csSegment3::Start(). |
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Intersect a 3D segment with the frustum plane By + z = 0. Assumes an intersection, and returns the intersection point in isect. Referenced by SegmentYFrustum(). |
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Intersect a 3D segment with the plane y = yval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Definition at line 482 of file math3d.h. References csSegment3::End(), SegmentYPlane(), and csSegment3::Start(). |
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Intersect a 3D segment with the plane y = yval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Referenced by SegmentAxisPlane(), and SegmentYPlane(). |
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Intersect a 3D segment with the z = 0 plane. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Definition at line 433 of file math3d.h. References csSegment3::End(), SegmentZ0Plane(), and csSegment3::Start(). |
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Intersect a 3D segment with the z = 0 plane. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Referenced by SegmentZ0Plane(). |
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Intersect a 3D segment with the plane z = zval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Definition at line 507 of file math3d.h. References csSegment3::End(), SegmentZPlane(), and csSegment3::Start(). |
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Intersect a 3D segment with the plane z = zval. Assumes that there is an intersection (fails if the segment is parallel to the plane), and returns the distance from u to the intersection point. The intersection point is returned in isect. Referenced by SegmentAxisPlane(), and SegmentZPlane(). |
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Intersect 3 planes to get the point that is part of all three planes. Returns true, if there is a single point that fits. If some planes are parallel, then it will return false. |
The documentation for this class was generated from the following file:
- csgeom/math3d.h
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