cCollisionAABBInternal Class Reference
[Collision Detection]

cCollisionAABBInternal contains methods to set up internal nodes of an AABB tree and to use them to detect for collision with a line. More...

#include <CCollisionAABBTree.h>

Inheritance diagram for cCollisionAABBInternal:

[legend]

List of all members.

Public Member Functions
	cCollisionAABBInternal ()
	Default constructor of cCollisionAABBInternal.
virtual	~cCollisionAABBInternal ()
	Destructor of cCollisionAABBInternal.
void	initialize (unsigned int a_numLeaves, cCollisionAABBLeaf *a_leaves, unsigned int a_depth=-1)
	Initialize internal node.
void	fitBBox (double a_radius=0)
	Size the bounding box for this node to enclose its children.
void	render (int a_depth=-1)
	Draw the edges of the bounding box for this node if it is at depth a_depth.
bool	computeCollision (cVector3d &a_segmentPointA, cVector3d &a_segmentPointB, cCollisionAABBBox &a_lineBox, cCollisionRecorder &a_recorder, cCollisionSettings &a_settings)
	Determine whether given line intersects the tree rooted at this node.
virtual bool	contains_triangle (int a_tag)
	Return true if this node contains the specified triangle tag.
virtual void	setParent (cCollisionAABBNode *a_parent, int a_recursive)
	Return parent node and optionally propagate the assignment to children.
Public Attributes
cCollisionAABBNode *	m_leftSubTree
	The root of this node's left subtree.
cCollisionAABBNode *	m_rightSubTree
	The root of this node's right subtree.
bool	m_testLineBox
	Test box for collision with ray itself (as compared to line's box)?

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Detailed Description

cCollisionAABBInternal contains methods to set up internal nodes of an AABB tree and to use them to detect for collision with a line.

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Member Function Documentation

bool cCollisionAABBInternal::computeCollision	(	cVector3d &	a_segmentPointA,
		cVector3d &	a_segmentPointB,
		cCollisionAABBBox &	a_lineBox,
		cCollisionRecorder &	a_recorder,
		cCollisionSettings &	a_settings
	)			[virtual]

Determine whether given line intersects the tree rooted at this node.

Determine whether the given line intersects the mesh covered by the AABB Tree rooted at this internal node. If so, return (in the output parameters) information about the intersected triangle of the mesh closest to the segment origin.

Parameters:

	a_segmentPointA	Initial point of segment.
	a_segmentPointB	End point of segment.
	a_lineBox	A bounding box for the incoming segment, for quick discarding of collision tests.
	a_recorder	Stores all collision events.
	a_settings	Contains collision settings information.

Returns:

Return true if line segment intersects a triangle in the subtree.

Implements cCollisionAABBNode.

bool cCollisionAABBInternal::contains_triangle

(

int

tag

)

[virtual]

Return true if this node contains the specified triangle tag.

Return whether this node contains the specified triangle tag.

Parameters:

tag

Tag to inquire about

Implements cCollisionAABBNode.

void cCollisionAABBInternal::initialize	(	unsigned int	a_numLeaves,
		cCollisionAABBLeaf *	a_leaves,
		unsigned int	a_depth = -1
	)

Initialize internal node.

Initialize an internal AABB tree node.

Parameters:

	a_numLeaves	Number of leaves in subtree rooted at this node.
	a_leaves	Pointer to the location in the array of leafs for the first leaf under this internal node.
	a_depth	Depth of this node in the collision tree.

void cCollisionAABBInternal::render

(

int

a_depth = -1

)

[virtual]

Draw the edges of the bounding box for this node if it is at depth a_depth.

Draw the edges of the bounding box for an internal tree node if it is at depth a_depth in the tree, and call the draw function for its children.

Parameters:

a_depth

Only draw nodes at this level in the tree. a_depth < 0 render _up to_ this level.

Implements cCollisionAABBNode.

void cCollisionAABBInternal::setParent	(	cCollisionAABBNode *	a_parent,
		int	a_recursive
	)			[virtual]

Return parent node and optionally propagate the assignment to children.

Sets this node's parent pointer and optionally propagate assignments to its children (setting their parent pointers to this node).

Parameters:

	a_parent	Pointer to this node's parent.
	a_recursive	Propagate assignment down the tree?

Implements cCollisionAABBNode.

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

• D:/CHAI3D/build-2-0-0/2.0.0/win32/src/collisions/CCollisionAABBTree.h
• D:/CHAI3D/build-2-0-0/2.0.0/win32/src/collisions/CCollisionAABBTree.cpp