ddgBBox3 Class Reference

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Class diagram for ddgBBox3:

Public Members
	enum	Split { XLT, XGT, YLT, YGT, ZLT, ZGT }
		Split options.
		ddgBBox3 (float xc = 0.0, float xd = MAXFLOAT, float yc = 0.0, float yd = MAXFLOAT, float zc = 0.0, float zd = MAXFLOAT)
		Default bounding box contains the entire 3D space. More...
		ddgBBox3 (const ddgVector3 &min, const ddgVector3 &max)
		Set bounding box using Min and Max vectors.
	void	set (float xmin = -MAXFLOAT, float xmax = MAXFLOAT, float ymin = -MAXFLOAT, float ymax = MAXFLOAT, float zmin = -MAXFLOAT, float zmax = MAXFLOAT)
		Set bounding box using Min Max coordinates.
	void	set (const ddgVector3 &pmin, const ddgVector3 &pmax)
		Set bounding box using another bounding box.
	float	minx ( void )
		Return bounding box minimum x value.
	float	miny ( void )
		Return bounding box minimum y value.
	float	minz ( void )
		Return bounding box minimum z value.
	float	maxx ( void )
		Return bounding box maximum x value.
	float	maxy ( void )
		Return bounding box maximum y value.
	float	maxz ( void )
		Return bounding box maximum z value.
	void	setx (float pmin, float pmax)
		Set the min and max of the bounding box along X-axis.
	void	sety (float pmin, float pmax)
		Set the min and max of the bounding box along Y-axis.
	void	setz (float pmin, float pmax)
		Set the min and max of the bounding box along Z-axis.
	void	split (Split side, float value = 0 )
		Split a bounding box in a given direction. More...
	float	cornerx (int n)
		Return the X coordinate of a corner of the BBox.
	float	cornery (int n)
		Return the Y coordinate of a corner of the BBox.
	float	cornerz (int n)
		Return the Z coordinate of a corner of the BBox.
	void	copy (ddgBBox3 *src)
		Copy the content of the src bbox.
	ddgVector3	centre (void)
		Return the centre point of the bounding box.
	void	move (ddgVector3 o)
		Move the bounding box by the specified vector.
	void	scale (ddgVector3 s)
		Scale the bounding box by the specified vector about its centre.
	float	distancesq ( ddgVector3 *p)
		Return the distance between the centre of the box and the coordinate.
	float	distance ( ddgVector3 *p)
		Return the true distance of the box's centre point to the eye.
	bool	intersect ( ddgVector3 p1, ddgVector3 p2)
		Test for intersection of line with bbox.
	bool	intersect ( ddgBBox3 *b )
		Test for intersection of another bbox.
	ddgVector3	size (void)
		Return the size of the box.
	ddgClipFlags	visibleSpace ( ddgBBox3 b, float tanHalfFOV )
		Test a bounding box against this bounding box in camera space. More...
	ddgVector3	min
		left bottom near corner of the bbox.
	ddgVector3	max
		right top far corner of the bbox.
Static Public Members
	short	_corner [8][3]
		Indexes to the corner points of the bounding box.

Detailed Description

Axis Aligned Bounding box object.

This object defines a 3d volume based a min and max point in 3D space.

Member Function Documentation

ddgBBox3::ddgBBox3 (float xc = 0.0, float xd = MAXFLOAT, float yc = 0.0, float yd = MAXFLOAT, float zc = 0.0, float zd = MAXFLOAT)

Default bounding box contains the entire 3D space.

Set bounding box using centre point and delta.

void ddgBBox3::split (Split side, float value = 0)

Split a bounding box in a given direction.

Optionally give a split location, default is in the middle of the box.

ddgClipFlags ddgBBox3::visibleSpace (ddgBBox3 b, float tanHalfFOV)

Test a bounding box against this bounding box in camera space.

Returns true if camera coordinates are visible from camera, also indicates which half space the point was in. Assumes bbox is already in camera space. vis indicates which half spaces don't need to be tested.

The documentation for this class was generated from the following files:

ddgbbox.h
ddgbbox.cpp

Generated at Sun Sep 17 19:27:51 2000 for Digital Dawn Graphics Toolkit by

ddgBBox3 Class Reference

Public Members

Static Public Members

Detailed Description

Member Function Documentation