U4DEngine::U4DEntityManager Class Reference

The U4DEntityManager Class manages the rendering, space update, physics, collision and visibility for all objects in a game. More...

Public Member Functions
	U4DEntityManager ()
	class constructor
	~U4DEntityManager ()
	class destructor
	U4DEntityManager (const U4DEntityManager &value)
	copy constructor
U4DEntityManager &	operator= (const U4DEntityManager &value)
	copy constructor
void	render (id< MTLCommandBuffer > uCommandBuffer)
	Renders the entities in the scenegraph. More...
void	update (float dt)
	Updates the state of each entity. More...
void	determineVisibility ()
	determines if the current entity is within the camera frustum More...
void	setRootEntity (U4DVisibleEntity *uRootEntity)
	sets the root entity More...
void	loadIntoCollisionEngine (U4DDynamicAction *uModel)
	loads the 3D model into the collision engine More...
void	loadIntoPhysicsEngine (U4DDynamicAction *uModel, float dt)
	loads the 3D model into the physics engine More...
void	loadIntoVisibilityManager (U4DModel *uModel)
	loads the 3d model into the visibility manager More...
void	changeVisibilityInterval (float uValue)
	change the current visibility interval. The default is 0.5. More...

Public Attributes
U4DEntity *	rootEntity
	pointer to the root entity. This entity represents the root node in the scenegraph

Detailed Description

The U4DEntityManager Class manages the rendering, space update, physics, collision and visibility for all objects in a game.

Member Function Documentation

changeVisibilityInterval()

void U4DEngine::U4DEntityManager::changeVisibilityInterval

(

float

uValue

)

change the current visibility interval. The default is 0.5.

This interval determines how fast the BVH is computed to determine which 3D models are within the camera frustum. The lower this interval, the faster the BVH is computed.

Parameters

uValue

time interval.

determineVisibility()

void U4DEngine::U4DEntityManager::determineVisibility

(

)

determines if the current entity is within the camera frustum

any 3D model outside of the frustum are not rendered

loadIntoCollisionEngine()

void U4DEngine::U4DEntityManager::loadIntoCollisionEngine

(

U4DDynamicAction *

uModel

)

loads the 3D model into the collision engine

Parameters

uModel

pointer to the 3d model

loadIntoPhysicsEngine()

void U4DEngine::U4DEntityManager::loadIntoPhysicsEngine	(	U4DDynamicAction *	uModel,
		float	dt
	)

loads the 3D model into the physics engine

Parameters

uModel	pointer to the 3d model
dt	time-step

loadIntoVisibilityManager()

void U4DEngine::U4DEntityManager::loadIntoVisibilityManager

(

U4DModel *

uModel

)

loads the 3d model into the visibility manager

the visibility manager determines if a 3d model is within the camera frustum

Parameters

uModel

pointer to the 3d model

render()

void U4DEngine::U4DEntityManager::render

(

id< MTLCommandBuffer >

uCommandBuffer

)

Renders the entities in the scenegraph.

It calls the individual render method of each entity in the scenegraph

Parameters

uRenderEncoder

Metal encoder object for the current entity

setRootEntity()

void U4DEngine::U4DEntityManager::setRootEntity

(

U4DVisibleEntity *

uRootEntity

)

sets the root entity

the root entity represents the root node in the scenegraph

Parameters

uRootEntity

pointer to the root parent entity

update()

void U4DEngine::U4DEntityManager::update

(

float

dt

)

Updates the state of each entity.

It updates the space matrix and calls the physics engine and collision system to evaluate each entity.

Parameters

dt	time-step value