CollisionModel Class Reference
[Game Data]

Basic class for collision detections. More...

#include <colmodel.h>

Collaboration diagram for CollisionModel:


Public Member Functions
	CollisionModel ()
virtual	~CollisionModel ()
bool	checkCollision (const CollisionModel &model)
	Checks if this model collides with another.
const GLVector3d &	getAvoidVector ()
	get mAvoidVector
bool	computeMinimalAvoidVector (const CollisionModel &model, GLVector3d &result)
	Compute minimal vector that avoids collision with second model.
double	computeMinimalAvoidDistance (const CollisionModel &model, GLVector3d &direction)
	Compute scale of direction vector so that translation will avoid collision with second model.
void	setTranslation (const GLVector3d &translation)
	Sets the translation ( to the world coordinates ) of the model.
void	addTranslation (const GLVector3d &translation)
	Add the relative ranslation ( to the world coordinates ) of the model.
void	setRotation (const GLQuaterniond &rotation)
	Sets the rotation (in the models coordinations) of the model.
void	addRotation (const GLQuaterniond &rotation)
	Add the rotation (in the models coordinations) of the model.
void	finishTransformations ()
	Finishes trasnsformations and computes final coordinates of model.
void	resetTransformations ()
	Resets the transformations set by setTranslation() and setRotation().
bool	isReseted () const
	Tells whether model is ready for applying transformations.
CDBox &	getModel ()
	Returns reference to the non-transformed model.
CDBox &	getTransModel ()
	Returns reference to the transformed model.
void	setModel (const CDBox &model)
	Sets the model to the given box.
Private Attributes
CDBox	mBox
	Default object box, the origin should be in center of object ( CommonEntity::mPosition respresents this point ).
CDBox	mTransBox
	Box with applyied transformations.
bool	mReseted
	True, if model is ready for applying new transformations.
GLVector3d	mTranslation
	Vector, that stores translations.
GLQuaterniond	mRotation
	Vector, that stores rotations.
GLVector3d	mAvoidVector
	Stores result of colision detection.

Detailed Description

Basic class for collision detections.

Description of algorithm for detectiong colision between two CollisionModels. The idea is firstly to use min max test - CDBox::quickCheckCollision and then the algorihm try to find sepparating axis.

Definition at line 241 of file colmodel.h.

Constructor & Destructor Documentation

CollisionModel::CollisionModel ( )

Definition at line 13 of file colmodel.cpp.
References mAvoidVector, mBox, mReseted, mRotation, mTransBox, mTranslation, ZERO_ROTATION_VECTOR, and CDBox::zeroize().
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virtual CollisionModel::~CollisionModel ( ) [inline, virtual]

Definition at line 245 of file colmodel.h.

Member Function Documentation

void CollisionModel::addRotation ( const GLQuaterniond & rotation ) [inline]

Add the rotation (in the models coordinations) of the model.

Parameters:

rotation Quaternion we want to add to current rotation.

Definition at line 328 of file colmodel.h.

void CollisionModel::addTranslation ( const GLVector3d & translation ) [inline]

Add the relative ranslation ( to the world coordinates ) of the model.
This may be used for incremental change of translation.
Parameters:

translation The vector of which we want to relatively translate

Definition at line 308 of file colmodel.h.

bool CollisionModel::checkCollision ( const CollisionModel & model ) [inline]

Checks if this model collides with another.
Checks if this model collides with another. If this is true, you can get vector to avoid colision by calling getAvoidVector()
Parameters:

model Another model, which we are checking for collisions with this model

Returns:
True, if there's a collision

Definition at line 254 of file colmodel.h.

double CollisionModel::computeMinimalAvoidDistance ( const CollisionModel & model,

GLVector3d & direction

)

Compute scale of direction vector so that translation will avoid collision with second model.
Scale of direction vector and its length to avoid second model.
Parameters:

model Another model, which we are checking for collision with this model

direction Vector in vhich you want to move this box.

Returns:
zero if no collision

Definition at line 169 of file colmodel.cpp.
References mTransBox, CDBox::quickCheckCollision(), SEP_TESTMAX, SEPSELF_MINUSTESTMAX, and SEPSELF_TESTMAX.
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bool CollisionModel::computeMinimalAvoidVector ( const CollisionModel & model,

GLVector3d & result

)

Compute minimal vector that avoids collision with second model.
Compute minimum vector and its length to avoid second model.
Parameters:

model Another model, which we are checking for collision with this model

result Vector that needs to be added (eg by addTranslation) to current translation vector of this model. The result is normalized. It may contain a garbage if no colision.

Returns:
true if there is a collision

Definition at line 44 of file colmodel.cpp.
References mTransBox, CDBox::quickCheckCollision(), SEP_TEST, SEPSELF_MINUSTEST, and SEPSELF_TEST.
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void CollisionModel::finishTransformations ( ) [inline]

Finishes trasnsformations and computes final coordinates of model.
Call this everytime you change translation, rotation or model. Else the collisions won't return correct results.
Definition at line 338 of file colmodel.h.
Referenced by CommonEntity::tranformColModel().

const GLVector3d& CollisionModel::getAvoidVector ( ) [inline]

get mAvoidVector
The vector is (may be) computed in checkCollision call
Returns:
mAvoidVector

Definition at line 265 of file colmodel.h.

CDBox& CollisionModel::getModel ( ) [inline]

Returns reference to the non-transformed model.

Note:
don't forget to call finishTransformations() is you modify the model.

Returns:
Reference to model without transformations

Definition at line 371 of file colmodel.h.
Referenced by Tank::render().

CDBox& CollisionModel::getTransModel ( ) [inline]

Returns reference to the transformed model.

Returns:
Reference to model with transformations

Definition at line 380 of file colmodel.h.
Referenced by TaskSimulationServer::checkTerrainHeights().

bool CollisionModel::isReseted ( ) const [inline]

Tells whether model is ready for applying transformations.

Definition at line 360 of file colmodel.h.

void CollisionModel::resetTransformations ( ) [inline]

Resets the transformations set by setTranslation() and setRotation().

Definition at line 349 of file colmodel.h.
Referenced by CommonEntity::tranformColModel().

void CollisionModel::setModel ( const CDBox & model ) [inline]

Sets the model to the given box.

Parameters:

model Box that will be the model

Definition at line 389 of file colmodel.h.

void CollisionModel::setRotation ( const GLQuaterniond & rotation ) [inline]

Sets the rotation (in the models coordinations) of the model.

Parameters:

rotation Quaternion we want to rotate by. (Like CommonEntity::mOrientation)

Definition at line 318 of file colmodel.h.
Referenced by CommonEntity::tranformColModel().

void CollisionModel::setTranslation ( const GLVector3d & translation ) [inline]

Sets the translation ( to the world coordinates ) of the model.
The old translation is deleted.
Parameters:

translation The vector of which we want to translate

Definition at line 297 of file colmodel.h.
Referenced by CommonEntity::tranformColModel().

Member Data Documentation

GLVector3d CollisionModel::mAvoidVector [private]

Stores result of colision detection.

Definition at line 406 of file colmodel.h.
Referenced by CollisionModel().

CDBox CollisionModel::mBox [private]

Default object box, the origin should be in center of object ( CommonEntity::mPosition respresents this point ).

Definition at line 396 of file colmodel.h.
Referenced by CollisionModel().

bool CollisionModel::mReseted [private]

True, if model is ready for applying new transformations.

Definition at line 400 of file colmodel.h.
Referenced by CollisionModel().

GLQuaterniond CollisionModel::mRotation [private]

Vector, that stores rotations.

Definition at line 404 of file colmodel.h.
Referenced by CollisionModel().

CDBox CollisionModel::mTransBox [private]

Box with applyied transformations.

Definition at line 398 of file colmodel.h.
Referenced by CollisionModel(), computeMinimalAvoidDistance(), and computeMinimalAvoidVector().

GLVector3d CollisionModel::mTranslation [private]

Vector, that stores translations.

Definition at line 402 of file colmodel.h.
Referenced by CollisionModel().

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

Generated on Wed Apr 12 14:12:32 2006 for bjs by

1.4.5

CollisionModel Class Reference [Game Data]

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

CollisionModel Class Reference
[Game Data]