 | GeometryHelper Class |
Provides helper methods for various geometry tasks.
Inheritance HierarchyNamespace: DigitalRune.Geometry
Assembly: DigitalRune.Geometry (in DigitalRune.Geometry.dll) Version: 1.18.0.0 (1.18.2.14427)
SyntaxThe GeometryHelper type exposes the following members.
Methods| Name | Description | |
|---|---|---|
  | ArePointsOnOppositeSides |
Determines whether two points P and Q are on opposite sides of a plane. The plane is
determined by three points (A, B, C).
|
| ComputeBoundingBox |
Computes the minimum box that contains the given points.
|
| ComputeBoundingCapsule |
Computes a tight-fitting capsule that contains the given points.
|
| ComputeBoundingSphere |
Computes the minimum sphere that contains the given points.
|
| ComputeCircumscribedSphere(Vector3F, Vector3F, Single, Vector3F) |
Computes a sphere where all given points touch the surface.
|
| ComputeCircumscribedSphere(Vector3F, Vector3F, Vector3F, Single, Vector3F) |
Computes a sphere where all given points touch the surface.
|
| ComputeCircumscribedSphere(Vector3F, Vector3F, Vector3F, Vector3F, Single, Vector3F) |
Computes a sphere where all given points touch the surface.
|
| CreateBoundingShape |
Computes a minimum bounding shape that contains all given points.
|
| CreateConvexHull(IEnumerableVector3F) |
Creates a convex hull mesh for a set of points.
|
| CreateConvexHull(IEnumerableVector3F, Int32, Single) |
Creates a convex hull mesh for a set of points.
|
| CreateIcosphere |
Creates a sphere (or hemisphere) by successively subdividing an icosahedron.
|
| ExtractPlanes(Matrix, IListPlane, Boolean) |
Extracts the viewing frustum planes of a world-view-projection matrix. (Only available in
the XNA-compatible build.)
|
| ExtractPlanes(Matrix44F, IListPlane, Boolean) |
Extracts the viewing frustum planes of a world-view-projection matrix.
|
| GetBarycentricFromPoint(Triangle, Vector3F, Single, Single, Single) |
Gets the barycentric coordinates of a point and a triangle.
|
| GetBarycentricFromPoint(Triangle, Vector3F, Single, Single, Single) |
Determines whether the projection of a point (into the triangle plane) is inside the given
triangle. (This overload uses per-reference parameters for performance.)
|
| GetClosestPoint(Aabb, Vector3F, Vector3F) |
Gets the point on or in an axis-aligned bounding box (AABB) that is closest to a given
point.
|
| GetClosestPoint(Line, Vector3F, Vector3F) |
Gets the closest point of a line to a point.
|
| GetClosestPoint(Plane, Vector3F, Vector3F) |
Gets the point on a plane surface that is closest to a given point.
|
| GetClosestPoint(Triangle, Vector3F, Single, Single, Single) |
Gets the barycentric coordinates (u, v,
w of the point in a triangle which is closest to
the given point).
|
| GetClosestPoints(LineSegment, Vector3F, Vector3F) |
Gets the closest point of a line segment to a point.
|
| GetClosestPoints(Line, Line, Vector3F, Vector3F) |
Gets the closest points of two lines.
|
| GetClosestPoints(LineSegment, Line, Vector3F, Vector3F) |
Gets the closest points of a line and a line segment.
|
| GetClosestPoints(LineSegment, LineSegment, Vector3F, Vector3F) |
Gets the closest points of two line segments.
|
| GetClosestPoints(Plane, Line, Vector3F, Vector3F) |
Gets the closest points of a line and a plane.
|
| GetClosestPoints(Plane, LineSegment, Vector3F, Vector3F) |
Gets the closest points of a line and a plane.
|
| GetContact |
Computes the ray vs. triangle contact.
|
| GetDistance(Aabb, Aabb) |
Computes the distance between the two axis-aligned bounding boxes (AABBs).
|
| GetDistance(Plane, Vector3F) |
Gets the signed distance of a point to a plane surface.
|
| GetIntersection |
Gets the intersection point of three planes.
|
| GetPointFromBarycentric |
Gets the point on the triangle defined by the given barycentric coordinates.
|
| GetVolume |
Gets the enclosed volume of a triangle mesh.
|
| HaveContact(Single, Vector3F) |
Determines whether the specified point is inside the sphere.
|
| HaveContact(Aabb, Aabb) |
Determines whether two axis-aligned bounding boxes (AABBs) overlap.
|
| HaveContact(Aabb, Plane) |
Determines whether the given axis-aligned bounding box (AABB) and plane overlap.
|
| HaveContact(Aabb, Ray) |
Determines whether the given axis-aligned bounding box (AABB) and ray overlap.
|
| HaveContact(Aabb, Vector3F) |
Determines whether the axis-aligned bounding box (AABB) contains or touches the given point.
|
| HaveContact(Triangle, Triangle) |
Determines whether two triangles overlap.
|
| HaveContact(Triangle, Triangle) |
Determines whether two triangles overlap.
|
| HaveContact(Vector3F, Vector3F) |
Determines whether the specified point is inside the box.
|
| HaveContact(Aabb, Aabb, Vector3F) |
Determines whether a given AABB is hit by a moving AABB.
|
| HaveContact(Aabb, Ray, Single) |
Determines whether the given axis-aligned bounding box (AABB) and ray overlap.
|
| HaveContact(Aabb, Vector3F, Pose, Boolean) |
Determines whether the axis-aligned bounding box (AABB) and a box have contact.
|
| IsInFront |
Determines whether the point is in front of the triangle.
|
| IsOver(Triangle, Vector3F) |
Determines whether the projection of a point (into the triangle plane) is inside the given
triangle.
|
| IsOver(Triangle, Vector3F) |
Determines whether the projection of a point (into the triangle plane) is inside the given
triangle. (This overload uses per-reference parameters for performance.)
|
| IsOver(Triangle, Vector3F, Single) |
Determines whether the projection of a point (into the triangle plane) is inside the given
triangle.
|
| MergeDuplicatePositions(IListVector3F, Single) |
Merges duplicate positions.
|
| MergeDuplicatePositions(IListVector3F, Single, Int32) |
Merges duplicate positions.
|
| Triangulate(IListVector3F, IListInt32) |
Triangulates a polygon specified by a list of vertices.
|
| Triangulate(IListVector3F, Int32, Int32, IListInt32) |
Triangulates a polygon specified by a list of vertices.
|
Remarks
This class is a collection of several helper methods to compute bounding volumes (see
CreateBoundingShape(IListVector3F),
ComputeBoundingBox(IListVector3F, Vector3F, Pose) and
ComputeBoundingSphere(IEnumerableVector3F, Single, Vector3F)) and convex hulls (see
CreateConvexHull(IEnumerableVector3F)). The other methods will not be needed
in most situations. For general collision detection tasks use the types in the namespace
DigitalRune.Geometry.Collisions.
See Also