OrientedBox3F
Engine/source/math/mOrientedBox.h
An oriented bounding box (OBB) described by a center point, three normalizes axis vectors, and half-extents along each of the axes.
Public Types
Axis { RightVector ForwardVector UpVector }
Protected Attributes
Protected Functions
Public Functions
OrientedBox3F(const MatrixF & transform, const Box3F & aabb)
OrientedBox3F(const MatrixF & transform, const Point3F & extents)
Return the half-extents along each axis.
bool
isContained(const Point3F & point)
Return true if the given point is contained in the OBB.
Return the array of corner points for the box.
Detailed Description
An oriented bounding box (OBB) described by a center point, three normalizes axis vectors, and half-extents along each of the axes.
Public Types
Axis
Enumerator
- RightVector
- ForwardVector
- UpVector
Protected Attributes
Point3F mAxes [3]
Normalized axis vectors.
Point3F mCenter
Center point.
Point3F mHalfExtents
Box half-extents along each axis.
Point3F mPoints [NUM_POINTS]
Corner points.
Protected Functions
_initPoints()
Public Functions
OrientedBox3F()
OrientedBox3F(const MatrixF & transform, const Box3F & aabb)
OrientedBox3F(const MatrixF & transform, const Point3F & extents)
getAxis(U32 i)
Return the normalized axis vector for the given world-space axis.
getCenter()
Return the center point of the bounding box.
getHalfExtents()
Return the half-extents along each axis.
Since the OBBs are symmetrical across each axis, we store half-extents instead of full extents as usually half-extents are needed in the computations.
getPoints()
Return the corner points of the box.
isContained(const Point3F & point)
Return true if the given point is contained in the OBB.
operator const Point3F*()
Return the array of corner points for the box.
set(const MatrixF & transform, const Box3F & aabb)
Compute the OBB from an AABB in the given transform space.
Parameters:
| transform | Transform space for the AABB. |
| aabb | An axis-aligned bounding box in the given transform space. |
set(const MatrixF & transform, const Point3F & extents)
Compute the OBB values from the given transform and extents.
Parameters:
| transform | World->object space transform. |
| extents | Box extent on each axis. |