Math::bbox Class Reference
#include <bbox.h>
Detailed Description
Nebula's bounding box class.
- Todo:
- : UNTESTED!
Public Types | |
| enum | |
| clip codes | |
Public Member Functions | |
| bbox () | |
| constructor 1 | |
| bbox (const point ¢er, const vector &extents) | |
| constructor 3 | |
| bbox (const matrix44 &m) | |
| construct bounding box from matrix44 | |
| point | center () const |
| get center of box | |
| vector | extents () const |
| get extents of box | |
| vector | size () const |
| get size of box | |
| scalar | diagonal_size () const |
| get diagonal size of box | |
| void | set (const matrix44 &m) |
| set from matrix44 | |
| void | set (const point ¢er, const vector &extents) |
| set from center point and extents | |
| void | begin_extend () |
| begin extending the box | |
| void | extend (const point &p) |
| extend the box | |
| void | extend (const bbox &box) |
| extend the box | |
| void | end_extend () |
| this resets the bounding box size to zero if no extend() method was called after begin_extend() | |
| void | transform (const matrix44 &m) |
| transform bounding box | |
| bool | intersects (const bbox &box) const |
| check for intersection with axis aligned bounding box | |
| bool | contains (const bbox &box) const |
| check if this box completely contains the parameter box | |
| bool | contains (const point &p) const |
| return true if this box contains the position | |
| ClipStatus::Type | clipstatus (const bbox &other) const |
| check for intersection with other bounding box | |
| ClipStatus::Type | clipstatus (const matrix44 &viewProjection) const |
| check for intersection with projection volume | |
| matrix44 | to_matrix44 () const |
| create a matrix which transforms a unit cube to this bounding box | |
| point | corner_point (int index) const |
| return one of the 8 corner points | |
| void | get_clipplanes (const matrix44 &viewProjection, Util::Array< plane > &outPlanes) const |
| return side planes in clip space | |
| template<typename T> | |
| T | as () const |
| convert to any type | |
Member Function Documentation
| void Math::bbox::set | ( | const matrix44 & | m | ) | [inline] |
set from matrix44
Construct a bounding box around a 4x4 matrix. The translational part defines the center point, and the x,y,z vectors of the matrix define the extents.
| void Math::bbox::end_extend | ( | ) | [inline] |
this resets the bounding box size to zero if no extend() method was called after begin_extend()
This just checks whether the extend() method has actually been called after begin_extend() and just sets vmin and vmax to the null vector if it hasn't.
| void Math::bbox::transform | ( | const matrix44 & | m | ) | [inline] |
transform bounding box
Transforms this axis aligned bounding by the 4x4 matrix. This bounding box must be axis aligned with the matrix, the resulting bounding will be axis aligned in the matrix' "destination" space.
E.g. if you have a bounding box in model space 'modelBox', and a 'modelView' matrix, the operation
modelBox.transform(modelView)
would transform the bounding box into view space.
| bool Math::bbox::intersects | ( | const bbox & | box | ) | const [inline] |
check for intersection with axis aligned bounding box
Check for intersection of 2 axis aligned bounding boxes. The bounding boxes must live in the same coordinate space.
| bool Math::bbox::contains | ( | const bbox & | box | ) | const [inline] |
check if this box completely contains the parameter box
Check if the parameter bounding box is completely contained in this bounding box.
| bool Math::bbox::contains | ( | const point & | p | ) | const [inline] |
return true if this box contains the position
Check if position is inside bounding box.
| ClipStatus::Type Math::bbox::clipstatus | ( | const bbox & | other | ) | const |
check for intersection with other bounding box
Return box/box clip status.
| ClipStatus::Type Math::bbox::clipstatus | ( | const matrix44 & | viewProjection | ) | const |
check for intersection with projection volume
Check for intersection with a view volume defined by a view-projection matrix.
| matrix44 Math::bbox::to_matrix44 | ( | ) | const [inline] |
create a matrix which transforms a unit cube to this bounding box
Create a transform matrix which would transform a unit cube to this bounding box.
| point Math::bbox::corner_point | ( | int | index | ) | const |
return one of the 8 corner points
Returns one of the 8 corners of the bounding box.
| void Math::bbox::get_clipplanes | ( | const matrix44 & | viewProj, | |
| Util::Array< plane > & | outPlanes | |||
| ) | const |
return side planes in clip space
Get the bounding box's side planes in clip space.