col::ColObj Class Reference

One collidable object. More...

Collaboration diagram for col::ColObj:

[legend]List of all members.

Public Member Functions
const char *	getName (void) const
void	setActive (bool active)
	Set the activity-status of a Colobj Used to remove an object temporarily from collision checks.
bool	isActive ()
	Returns the activity-status of a Colobj.
void	setFlexible (bool flexible)
void	setStationary (bool stationary)
void	SetGridObj (Grid *grid)
Constructors, desctructors, assignment
	ColObj ()
	The default ctor is not meant for "real" usage It is only there so that we can create vector's.
	ColObj (osg::GeometryPtr &geom, osg::NodePtr &node, bool flexible, bool stationary, bool compute_hull, AlgoE algo, Grid *grid, bool show_hull=false, char *name=NULL)
	The ctor you should use.
	ColObj (const ColObj &source)
	Copy a collision object.
void	operator= (const ColObj &source)
	Assignment.
Checks
void	updateBBox (void)
	Update current world bbox.
bool	bboxIntersects (ColObj *other)
	Check if the bboxes of two objects intersect.
bool	hasMoved (unsigned int global_cycle)
	Update toworld matrix and check whether or not an object has moved.
GridObj *	GetGridObj (void)
	Return GridObj.
void	updateGrid (void)
	Update GridObj if object has moved.
Static Public Member Functions
static ColObj *	find (vector< ColObj > *colobjs, osg::NodePtr obj)
	Find the colobjs[i] for which colobjs[i].m_node == obj; If not found, returns NULL.
Protected Attributes
bool	m_active
	Used to remove an object temporarily from collision checks.
bool	m_flexible
	Set if the object deforms.
bool	m_stationary
	Set if the object doesn't move.
const DopTree *	m_doptree
	DOP tree of this obj.
const Boxtree *	m_boxtree
	Boxtree of this obj.
osg::NodePtr	m_node
	The actual "collidable" object.
osg::Matrix	m_old_matr
	The toWorld matrix of node as of last frame.
osg::Matrix	m_curr_matr
	The current toWorld matrix as of start of current cycle.
vector< const osg::MFPnt3f * >	points
char *	m_name
	The name of the colobj.
int	m_col_matr_idx
	row/column index into col.
bool	m_has_moved
	Flags whether or not obj has moved since last frame.
bool	m_first_moved_check
unsigned int	m_cycle
ConvexHull	m_hull
	the convex hull of geom
GridObj *	m_gridobj
Friends
class	Matrix
class	MatrixCell
class	ColPair

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Detailed Description

One collidable object.

Holds various flags for one collidable object, including all auxiliary collision detection data (hierarchies, etc.).

Todo:

Was man noch tun muss ..

Implementation:

Each ColObj stores the toWorld matrix of the geometry, because the collision detection module does not necessarily run in its own thread, and thus does not necessarily have its own aspect.

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Constructor & Destructor Documentation

col::ColObj::ColObj	(	osg::GeometryPtr &	geom,
		osg::NodePtr &	node,
		bool	flexible,
		bool	stationary,
		bool	compute_hull,
		AlgoE	algo,
		Grid *	grid,
		bool	show_hull = false,
		char *	colname = NULL
	)

The ctor you should use.

Parameters:

	geom,node	the OSG object
	flexible	tells the coll.det. module that this object might deform
	stationary	tells the coll.det. module that this object won't move
	compute_hull	a convex hull of m_geom will be computed and stored,
	algo	determines what hierarchical data structure to build
	show_hull	creates a geometry from the convex hull
	colname	name of colobj

This is the ctor whould should be used for creating ColObj's.

If an object is not m_stationary, then hasMoved() will return true when called for the first time (whether or not the object really has moved).

If show_hull is true, then the convex hull geometry will be attached to the m_node so that it will get rendered, too.

Colname is the name which will be printed with ColObj::print; if it is NULL, then the OSG name will be printed; if that does not exist, an automatically generated ID will be printed.

Precondition:

m_geom should belong to m_node.

Exceptions:

	XDopTree	If geometry has no polygons, or no GeoPosition3f.
	XColBug	If a bug in the doptree code occurs.
	bad_alloc

Todo:

Parameter m_geom ist ueberfluessig.

See also:

MatrixCell::check

col::ColObj::ColObj

(

const ColObj &

source

)

Copy a collision object.

Warning:

Since the two colobj's point to the same geometry, their DOP trees are copied only shallow!

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Member Function Documentation

void col::ColObj::operator=

(

const ColObj &

source

)

Assignment.

Warning:

Since the two colobj's point to the same geometry, their DOP trees are copied only shallow!

void col::ColObj::updateBBox

(

void

)

Update current world bbox.

Calculates the current bbox in world coordinates. It can be retrieved later by getBBox().

Bug:

Funktioniert noch nicht, da OSG einen Bug hat.

bool col::ColObj::bboxIntersects

(

ColObj *

other

)

Check if the bboxes of two objects intersect.

Parameters:

other

another collision object

bool col::ColObj::hasMoved

(

unsigned int

global_cycle

)

Update toworld matrix and check whether or not an object has moved.

This is based on a toWorld matrix comparison. The check will be performed only once per collision cycle.

Whether or not the obj has moved, m_curr_matr will be copied into m_old_matr, and m_curr_matr will get the node's current toWorld matrix. This happens only if global_cycle has been incremented.

See also:

MatrixCell::check()

void col::ColObj::setActive

(

bool

active

)

Set the activity-status of a Colobj Used to remove an object temporarily from collision checks.

Parameters:

active

true => object will be checked

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Member Data Documentation

int col::ColObj::m_col_matr_idx [protected]

row/column index into col.

interest matrix If col_matr_idx < 0, then the ColObj is not valid. However, this should never happen!

bool col::ColObj::m_has_moved [protected]

Flags whether or not obj has moved since last frame.

Is valid only if cycle == coll::Cycle

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

• ColObj.h
• ColObj.cpp

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