CObjectManager Class Reference

The object manager. More...

#include <ObjectManager.h>

Inheritance diagram for CObjectManager:

Collaboration diagram for CObjectManager:

Public Member Functions
	CObjectManager ()
	Constructor.
	~CObjectManager ()
	Destructor.
void	Create (eSprite, const Vector2 &)
	Create new object.
void	Clear ()
	Reset to initial conditions.
void	Move ()
	Move all objects.
void	Draw ()
	Draw all objects.
void	ResetImpulseVector ()
	Reset the Impulse Vector.
void	AdjustImpulseVector (float)
	Adjust the Impulse Vector.
void	AdjustCueBall (float)
	Move cue-ball up or down.
void	Shoot ()
	Shoot the cue ball.
bool	BallDown ()
	Is a ball down in a pocket?
bool	CueBallDown ()
	Is the cue ball down in a pocket?
bool	AllStopped ()
	Have all balls stopped moving?

Private Member Functions
void	BroadPhase ()
	Ball, rail, and pocket collision response.
void	NarrowPhase (CObject *, CObject *)
	Collision response for two balls.
void	RailCollide (CObject *)
	Collision response for ball with rail.
void	PocketCollide (CObject *)
	Collision response for ball with pocket.

Private Attributes
Sage::CParticleDesc2D	m_cPDesc0
	Particle descriptor for balls in step mode.
Sage::CParticleDesc2D	m_cPDesc1
	Particle descriptor for collisions in step mode.
Sage::CParticleDesc2D	m_cPDesc2
	Particle descriptor for collisions in real-time mode.
CObject *	m_pCueBall = nullptr
	Cue ball object pointer.
CObject *	m_p8Ball = nullptr
	8 ball object pointer.
float	m_fCueAngle = 0
	Cue ball impulse angle.
bool	m_bDrawImpulseVector = true
	Whether to draw the impulse vector.

Additional Inherited Members
Static Protected Attributes inherited from CCommon
static Sage::CSpriteRenderer *	m_pRenderer = nullptr
	Pointer to the renderer.
static CObjectManager *	m_pObjectManager = nullptr
	Pointer to the object manager.
static Sage::CParticleEngine2D *	m_pParticleEngine = nullptr
	Pointer to particle engine.
static bool	m_bShowCollisions = false
	Show ball positions at TOI.
static bool	m_bStepMode = false
	Is in step mode.
static bool	m_bStep = false
	Step flag.
static float	m_fXMargin = 78.0f
	Horizontal margin.
static float	m_fYMargin = 64.0f
	Vertical margin.
static Vector2	m_vMargin = Vector2(m_fXMargin, m_fYMargin)
	Margins.
static Vector2	m_vTopLPocket = Vector2(71, 478)
	Position of top left pocket.
static Vector2	m_vTopRPocket = Vector2(955, 478)
	Position of top right pocket.
static Vector2	m_vTopCPocket = Vector2(514, 478)
	Position of top center pocket.
static Vector2	m_vBotLPocket = Vector2(71, 53)
	Position of bottom left pocket.
static Vector2	m_vBotRPocket = Vector2(955, 53)
	Position of bottom right pocket.
static Vector2	m_vBotCPocket = Vector2(514, 48)
	Position of bottom center pocket.

Detailed Description

A managed collection of all of the game objects.

Constructor & Destructor Documentation

CObjectManager()

CObjectManager::CObjectManager

(

)

Initialize the sprite descriptors for the circle and thick circle particles used to show discrete motion and collision points.

~CObjectManager()

CObjectManager::~CObjectManager

(

)

Delete the cue-ball and 8-ball objects.

Member Function Documentation

AdjustCueBall()

void CObjectManager::AdjustCueBall

(

float

d

)

Adjust the cue ball up or down on the base line, being careful stop it at the horizontal rails. This should only be used in eGameState::Initial, but no check is made here.

Parameters

d	Distance to move by.

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AdjustImpulseVector()

void CObjectManager::AdjustImpulseVector

(

float

a

)

Adjust the angle of the impulse vector. This should only be used in eGameState::Initial or eGameState::SetupShot, but no check is made here.

Parameters

a	Amount to add to the angle of the impulse vector.

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AllStopped()

bool CObjectManager::AllStopped

(

)

Check whether both the cue-ball and the 8-ball have stopped moving. Notice that we can set the velocity vector to the zero vector and expect it to succeed because CObject::move zeros out the velocity of slow-moving objects.

Returns

true If both balls have stopped moving.

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BallDown()

bool CObjectManager::BallDown

(

)

Check whether the cue-ball or the 8-ball is in a pocket.

Returns

true If one of the balls is in a pocket.

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BroadPhase()

void CObjectManager::BroadPhase ( )

private

Collision detection and response for all balls against each other and the rails and pockets. We do pocket collision for all balls first to remove them from the subsequent calculations.

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Clear()

void CObjectManager::Clear

(

)

Delete all of the objects in the game. Ideally this should consist of a switch statement, but there are only two objects here, the cue-ball and the 8-ball.

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Create()

void CObjectManager::Create	(	eSprite	t,
		const Vector2 &	v )

Create an object and save a pointer to it. Ideally this should consist of a switch statement, but there are only two objects here, the cue-ball and the 8-ball.

Parameters

t	Sprite type.
v	Initial position.

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CueBallDown()

bool CObjectManager::CueBallDown

(

)

Check whether the cue-ball is down a pocket.

Returns

true If the cue-ball is in a pocket.

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Draw()

void CObjectManager::Draw

(

)

Draw all of the objects in the game, two balls, the directional arrow, and the step mode indicator and the collision indicator if necessary.

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Move()

void CObjectManager::Move

(

)

Move all of the objects in the object list and perform broad phase collision detection and response. If in Step Mode, drop a particle.

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NarrowPhase()

void CObjectManager::NarrowPhase ( CObject * p0, CObject * p1 )

private

Ball to ball collision detection and response. Deflect the balls in the appropriate directions and speeds, and play a sound at the point of impact at a volume proportional to the relative speed of at time of impact. See Section 5.2.1 of the documentation for details of the geometry used here.

Parameters

p0	Pointer to first object.
p1	Pointer to first object.

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PocketCollide()

void CObjectManager::PocketCollide ( CObject * b )

private

Collision detection and response for ball-in-pocket. Check for a collision and does the necessary housework for disabling a ball that is in a pocket. If there is a collision, a sound is played at a volume proportional to the speed of collision and panned to the left or right according to where the pocket is on the table.

Parameters

b	Pointer to a ball object to collide with pockets.

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RailCollide()

void CObjectManager::RailCollide ( CObject * b )

private

Collision detection and response for ball hitting any rail. Check for a collision and do the necessary housework for reflecting the ball if it hits a rail. If there is a collision, a sound is played at a volume proportional to the speed of collision at the point of impact. See Section 5.2.2 of the documentation for details of the geometry used here.

Parameters

b	Pointer to a ball object to collide with rails.

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ResetImpulseVector()

void CObjectManager::ResetImpulseVector

(

)

Make the impulse vector point from the center of the cue-ball to the center of the 8-ball and set it as visible so it gets drawn (assuming that the only reason to reset the impulse vector is because it needs to be drawn).

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Shoot()

void CObjectManager::Shoot

(

)

Shoot the cue-ball by giving it a fixed impulse. Disable the drawing of the impulse vector and play a sound that is panned left or right depending on where the cue-ball is on the table.

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