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It provides storage for two box corners with double precision floating point coordinates, and for a double precision 4x4 transformation matrix. More...
#include <Inventor/SbBox.h>
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 |
It provides storage for two box corners with double precision floating point coordinates, and for a double precision 4x4 transformation matrix.
SbXfBox3d::SbXfBox3d | ( | void | ) |
The default constructor makes an empty box and identity matrix.
References SbDPMatrix::makeIdentity().
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.
References SbDPMatrix::makeIdentity().
SbXfBox3d::SbXfBox3d | ( | const SbBox3d & | box | ) |
Constructs a box from the given SbBox3d.
The transformation is set to the identity matrix.
References SbDPMatrix::makeIdentity().
void SbXfBox3d::setTransform | ( | const SbDPMatrix & | m | ) |
Sets the transformation to the given SbMatrix.
Referenced by extendBy(), and transform().
const SbDPMatrix & SbXfBox3d::getTransform | ( | void | ) | const [inline] |
Returns the current transformation matrix.
Referenced by extendBy().
const SbDPMatrix & SbXfBox3d::getInverse | ( | void | ) | const |
Returns the inverse of the current transformation matrix.
Referenced by extendBy(), and intersect().
SbVec3d SbXfBox3d::getCenter | ( | void | ) | const |
Return the transformed center point of the box.
Reimplemented from SbBox3d.
References SbDPMatrix::multVecMatrix().
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.
Reimplemented from SbBox3d.
References getInverse(), SbBox3d::isEmpty(), SbDPMatrix::makeIdentity(), and SbDPMatrix::multVecMatrix().
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.
Reimplemented from SbBox3d.
References SbBox3d::extendBy(), getInverse(), SbBox3d::getMax(), SbBox3d::getMin(), SbBox3d::getVolume(), getVolume(), SbBox3d::isEmpty(), SbDPMatrix::makeIdentity(), SbDPMatrix::multVecMatrix(), SoDebugError::postInfo(), SoDebugError::postWarning(), project(), SbBox3d::setBounds(), setTransform(), and SbVec3d::setValue().
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.
References getInverse(), SbBox3d::getMax(), SbBox3d::getMin(), getTransform(), getVolume(), SbBox3d::isEmpty(), SbDPMatrix::multRight(), SbDPMatrix::multVecMatrix(), SoDebugError::postInfo(), SoDebugError::postWarning(), and SbVec3d::setValue().
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.
Reimplemented from SbBox3d.
References SbDPMatrix::multVecMatrix().
Referenced by intersect().
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.
Reimplemented from SbBox3d.
References SbBox3d::getMax(), SbBox3d::getMin(), SbDPMatrix::identity(), intersect(), SbBox3d::isEmpty(), and SoDebugError::postWarning().
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.
References getInverse(), intersect(), and transform().
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.
References SbBox3d::getMax(), SbBox3d::getMin(), SbBox3d::isEmpty(), and SbBox3d::transform().
Referenced by extendBy(), and getSpan().
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.
Reimplemented from SbBox3d.
References SbBox3d::getSpan(), and project().
void SbXfBox3d::transform | ( | const SbDPMatrix & | m | ) |
Overridden from SbBox3d, as the transformations are to be kept separate from the box in the SbXfBox3d class.
Reimplemented from SbBox3d.
References SbDPMatrix::multRight(), and setTransform().
Referenced by intersect().
double SbXfBox3d::getVolume | ( | void | ) | const |
Return box volume. Overridden from parent class to take into account the possibility of scaling in the transformation matrix.
Reimplemented from SbBox3d.
References SbDPMatrix::det3(), and SbBox3d::hasVolume().
Referenced by extendBy().
Copyright © 1998-2007 by Systems in Motion AS. All rights reserved.
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