NAME¶

SbXfBox3d - The SbXfBox3d class is a 3 dimensional box with double precision coordinates and an attached transformation. It provides storage for two box corners with double precision floating point coordinates, and for a double precision 4x4 transformation matrix.

SYNOPSIS¶

Inherits SbBox3d.

Public Member Functions¶

SbXfBox3d (void) SbXfBox3d (const SbVec3d &boxmin, const SbVec3d &boxmax) SbXfBox3d (const SbBox3d &box) void setTransform (const SbDPMatrix &matrix) const SbDPMatrix & getTransform (void) const const SbDPMatrix & getInverse (void) const SbVec3d getCenter (void) const void extendBy (const SbVec3d &pt) void extendBy (const SbBox3d &bb) void extendBy (const SbXfBox3d &bb) SbBool intersect (const SbVec3d &pt) const SbBool intersect (const SbBox3d &bb) const SbBool intersect (const SbXfBox3d &bb) const SbBox3d project (void) const void getSpan (const SbVec3d &direction, double &dMin, double &dMax) const void transform (const SbDPMatrix &matrix) double getVolume (void) const

Additional Inherited Members¶

Detailed Description¶

The SbXfBox3d class is a 3 dimensional box with double precision coordinates and an attached transformation. It provides storage for two box corners with double precision floating point coordinates, and for a double precision 4x4 transformation matrix. See also:

Constructor & Destructor Documentation¶

SbXfBox3d::SbXfBox3d (void)¶

The default constructor makes an empty box and identity matrix.

SbXfBox3d::SbXfBox3d (const SbVec3d &boxmin, const SbVec3d &boxmax)¶

Constructs a box with the given corners. The coordinates of min should be less than the coordinates of max if you want to make a valid box.

SbXfBox3d::SbXfBox3d (const SbBox3d &box)¶

Constructs a box from the given SbBox3d. The transformation is set to the identity matrix.

Member Function Documentation¶

void SbXfBox3d::setTransform (const SbDPMatrix &m)¶

Sets the transformation to the given SbMatrix.

const SbDPMatrix & SbXfBox3d::getTransform (void) const [inline]¶

Returns the current transformation matrix.

const SbDPMatrix & SbXfBox3d::getInverse (void) const¶

Returns the inverse of the current transformation matrix.

SbVec3d SbXfBox3d::getCenter (void) const¶

Return the transformed center point of the box.

void SbXfBox3d::extendBy (const SbVec3d &pt)¶

Extend the boundaries of the box by the given point, i.e. make the point fit inside the box if it isn't already so. The point is assumed to be in transformed space.

void SbXfBox3d::extendBy (const SbBox3d &bb)¶

Extend the boundaries of the box by the given bb parameter. The given box is assumed to be in transformed space. The two given boxes will be combined in such a way so that the resultant bounding box always has the smallest possible volume. To accomplish this, the transformation on this SbXfBox3f will sometimes be flattened before it's combined with bb.

void SbXfBox3d::extendBy (const SbXfBox3d &bb)¶

Extend the boundaries of the box by the given bb parameter. The given box is assumed to be in transformed space. Note: is not guaranteed to give an optimal result if used for bbox calculation since the transformation matrix might change. See documentation in SoGetBoundingBoxAction for more details.

SbBool SbXfBox3d::intersect (const SbVec3d &pt) const¶

Check if the given point lies within the boundaries of this box. The point is assumed to be in transformed space.

SbBool SbXfBox3d::intersect (const SbBox3d &bb) const¶

Check if the given box lies wholly or partly within the boundaries of this box. The given box is assumed to be in transformed space.

SbBool SbXfBox3d::intersect (const SbXfBox3d &xfbb) const¶

Check if two transformed boxes intersect. This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API. Since:

SbBox3d SbXfBox3d::project (void) const¶

Project the SbXfBox3d into a SbBox3d. This gives the same resulting SbBox3d as doing a SbBox3d::transform() with this transformation matrix as parameter.

void SbXfBox3d::getSpan (const SbVec3d &direction, double &dMin, double &dMax) const¶

Find the span of the box in the given direction (i.e. how much room in the given direction the box needs). The distance is returned as the minimum and maximum distance from origo to the closest and furthest plane defined by the direction vector and each of the box' corners. The difference between these values gives the span.

void SbXfBox3d::transform (const SbDPMatrix &m)¶

Overridden from SbBox3d, as the transformations are to be kept separate from the box in the SbXfBox3d class.

double SbXfBox3d::getVolume (void) const¶

Return box volume. Overridden from parent class to take into account the possibility of scaling in the transformation matrix.

Author¶

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