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#include <Inventor/SbBox2d.h>
This box class is used by many other classes in Coin for data exchange and storage. It provides two box corners with double precision coordinates, which is among other things useful for representing screen or canvas dimensions in normalized coordinates.
This class is a Coin extension.
TGS Inventor 2.6
Public Member Functions | |
SbBox2d (void) | |
SbBox2d (double xmin, double ymin, double xmax, double ymax) | |
SbBox2d (const SbVec2d &min, const SbVec2d &max) | |
~SbBox2d (void) | |
const SbVec2d & | getMin (void) const |
const SbVec2d & | getMax (void) const |
SbVec2d | getCenter (void) const |
void | extendBy (const SbVec2d &point) |
void | extendBy (const SbBox2d &box) |
SbBool | intersect (const SbVec2d &point) const |
SbBool | intersect (const SbBox2d &box) const |
SbBool | findIntersection (const SbVec2d &a, const SbVec2d &b, SbVec2d &ia, SbVec2d &ib) const |
SbVec2d | getClosestPoint (const SbVec2d &p) const |
void | setBounds (double xmin, double ymin, double xmax, double ymax) |
void | setBounds (const SbVec2d &min, const SbVec2d &max) |
void | getBounds (double &xmin, double &ymin, double &xmax, double &ymax) const |
void | getBounds (SbVec2d &min, SbVec2d &max) const |
void | getOrigin (double &x0, double &y0) const |
void | getSize (double &w, double &h) const |
double | getAspectRatio (void) const |
void | makeEmpty (void) |
SbBool | isEmpty (void) const |
SbBool | hasArea (void) const |
Friends | |
int | operator== (const SbBox2d &b1, const SbBox2d &b2) |
int | operator!= (const SbBox2d &b1, const SbBox2d &b2) |
SbBox2d::SbBox2d | ( | void | ) |
The default constructor makes an empty box.
SbBox2d::SbBox2d | ( | double | xmin, | |
double | ymin, | |||
double | xmax, | |||
double | ymax | |||
) |
Constructs a box with the given corners.
xmin should be less than xmax and ymin should be less than ymax if you want to make a valid box.
Constructs a box with the given lower left and upper right corners.
The coordinates of min should be less than the coordinates of max if you want to make a valid box.
SbBox2d::~SbBox2d | ( | void | ) |
Destructor.
const SbVec2d & SbBox2d::getMin | ( | void | ) | const |
const SbVec2d & SbBox2d::getMax | ( | void | ) | const |
SbVec2d SbBox2d::getCenter | ( | void | ) | const |
Returns the center point of the box.
void SbBox2d::extendBy | ( | const SbVec2d & | point | ) |
Extend the boundaries of the box by the given point, i.e. make the box fit around the point if it isn't already situated within it.
void SbBox2d::extendBy | ( | const SbBox2d & | box | ) |
Extend the boundaries of the box by the given box parameter. This is equal to calling the above method twice with the corner points.
SbBool SbBox2d::intersect | ( | const SbVec2d & | point | ) | const |
Check if point lies within the boundaries of this box.
SbBool SbBox2d::intersect | ( | const SbBox2d & | box | ) | const |
Check if box lies wholly or partly within the boundaries of this box.
SbBool SbBox2d::findIntersection | ( | const SbVec2d & | a, | |
const SbVec2d & | b, | |||
SbVec2d & | ia, | |||
SbVec2d & | ib | |||
) | const |
Check if a a line from a to b intersects the box, and return the coordinates of the union line in ia and ib.
This function is a Coin extension.
Return the point on the box closest to the given point p.
void SbBox2d::setBounds | ( | double | xmin, | |
double | ymin, | |||
double | xmax, | |||
double | ymax | |||
) |
Reset the boundaries of the box.
xmin should be less than xmax and ymin should be less than ymax if you want to make a valid box.
Reset the boundaries of the 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.
void SbBox2d::getBounds | ( | double & | xmin, | |
double & | ymin, | |||
double & | xmax, | |||
double & | ymax | |||
) | const |
void SbBox2d::getOrigin | ( | double & | x0, | |
double & | y0 | |||
) | const |
void SbBox2d::getSize | ( | double & | w, | |
double & | h | |||
) | const |
Returns width and height of box.
double SbBox2d::getAspectRatio | ( | void | ) | const |
Returns aspect ratio of box, which is defined as box width divided on box height.
void SbBox2d::makeEmpty | ( | void | ) |
SbBool SbBox2d::isEmpty | ( | void | ) | const |
SbBool SbBox2d::hasArea | ( | void | ) | const |
Check if the box has "positive" area, i.e. the lower left corner is actually lower and more to the left than the other corner point.
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