The object manager. More...

#include <ObjectManager.h>

Inheritance diagram for CObjectManager:

Public Member Functions
	~CObjectManager ()
	Destructor. More...

CShape *	AddShape (CShapeDesc *, const CObjDesc &)
	Add shape. More...

void	clear ()
	Clear all dynamic shapes. More...

void	move ()
	Move all objects. More...

void	Draw ()
	Draw all objects. More...

void	ResetQuadTree (UINT)
	Reset the quadtree. More...

void	UpdateQuadtree ()
	Update the quadtree. More...

void	MakeWorldEdges ()
	Create shapes for world edges. More...

void	MakeShapes ()
	Create shapes. More...

void	MakeLineSeg (const Vector2 &, const Vector2 &, eSound)
	Make static line segment with guard points. More...

void	RotateKinematic (bool)
	Start or stop kinematic shapes rotating. More...

UINT	GetCollisionCnt ()
	Get number of collisions since last called. More...

UINT	GetCollisionTestCnt ()
	Get number of collision tests since last called. More...

UINT	GetAABBTestCnt ()
	Get number of AABB tests since last called. More...

UINT	GetLostBallCnt () const
	Get number of lost balls. More...

UINT	GetOverlapCnt () const
	Get number of overlapped balls. More...

UINT	GetQTLevelCount () const
	Get quadtree level count. More...

UINT	GetQTNodeCount () const
	Get quadtree node count. More...

UINT	GetQTLeafCount () const
	Get quadtree leaf count. More...

Vector2	GetQTNodeArea () const
	Get quadtree leaf area. More...

UINT	GetQTMaxLeafSize () const
	Get maximum number of objects in a leaf. More...

Private Member Functions
CShape *	MakeShape (CShapeDesc *, const CObjDesc &)
	Make a shape. More...

void	BroadPhase (std::vector< CShape * >[])
	Broad phase collision detection and response, brute force. More...

void	BroadPhaseWithQuadtree ()
	Broad phase collision detection and response with quadtree. More...

bool	NarrowPhase (CShape , CDynamicCircle )
	Narrow phase collision detection and response. More...

void	DrawObject (CObject *)
	Draw an object. More...

void	DrawAABBs ()
	Draw AABBs. More...

void	DrawSectors ()
	Draw arc sectors. More...

void	DrawTangents ()
	Draw tangents on line segments and arcs. More...

Private Attributes
std::vector< CShape * >	m_stdShapes [(UINT) eMotion::Size]
	Array of lists of shapes.

std::vector< CObject * >	m_stdObjects
	Object list.

CGate *	m_pGate = nullptr
	Pointer to gate.

CAabb2D	m_cAABB
	AABB for playable part of the game world.

UINT	m_nLostBalls = 0
	Number of lost balls.

CQuadTree *	m_pQuadTree = nullptr
	Quadtree for collision detection and response.

UINT	m_nCollisionCnt = 0
	Number of collisions.

UINT	m_nCloseCollisionCnt = 0
	Number of close collisions.

UINT	m_nCollisionTestCnt = 0
	Number of collision tests.

UINT	m_nAABBTestCnt = 0
	AABB test count.

UINT	m_nOverlapCnt = 0
	Number of overlaps.

Additional Inherited Members
Static Protected Attributes inherited from CCommon
static CRenderer *	m_pRenderer = nullptr
	Pointer to the renderer.

static CObjectManager *	m_pObjectManager = nullptr
	Pointer to the object manager.

static LParticleEngine2D *	m_pFrontParticleEngine = nullptr
	Pointer to front particle engine.

static LParticleEngine2D *	m_pBackParticleEngine = nullptr
	Pointer to front particle engine.

static bool	m_bShowTrack = false
	Show trail of breadcrumbs.

static bool	m_bShowReticles = false
	Show reticle at hit point.

static bool	m_bShowImpacts = false
	Draw dots at collision points.

static bool	m_bShowArrows = false
	Draw arrows for velocity vectors.

static bool	m_bShowTangents = false
	Draw arrows for tangents.

static bool	m_bShowSectors = false
	Draw arc sentinels and normals.

static bool	m_bShowAABBs = false
	Draw shape AABBs.

static bool	m_bShowLights = false
	Light up shapes on collision.

static bool	m_bRotate = false
	Rotate kinematic shapes.

static bool	m_bLaunch = false
	Launch a ball.

static bool	m_bMute = false
	Mute the sound.

static float	m_fNextBallScale = 0.5f
	Scale factor for ball size.

static int	m_nMIterationsInit = 4
	Initial number of motion iterations.

static int	m_nCIterationsInit = 6
	Initial number of collision iterations.

static int	m_nMIterations = CCommon::m_nMIterationsInit
	Current number of motion iterations.

static int	m_nCIterations = CCommon::m_nCIterationsInit
	Current number of collision iterations.

static bool	m_bUseQuadTree = false
	Whether to use a quadtree.

static HWND	m_hDlg = nullptr
	Control dialog box handle.

static float	m_fLoad = 0.0f
	Processor load.

static float	m_fLaunchSpeed = 1000.0f
	Speed at which the next ball will be launched.

static int	m_nDesiredLaunchCnt = 1
	Number of balls to launch at next multilaunch.

static int	m_nLaunched = 0
	Number of balls launched in current multilaunch.

static bool	m_bMultiLaunch = false
	Whether launching multiple balls.

static int	m_nBallsLaunched = 0
	Number of balls in play.

static float	m_fFrequency = 60.0f*m_nMIterations
	Frequency, number of physics iterations per second.

Detailed Description

A collection of all of the game objects.

Constructor & Destructor Documentation

◆ ~CObjectManager()

CObjectManager::~CObjectManager ( )

The destructor clears the shape lists, which destructs all of the shapes in them.

Member Function Documentation

◆ AddShape()

CShape * CObjectManager::AddShape	(	CShapeDesc *	sd,
		const CObjDesc &	od
	)

Creates a new shape and pushes a contact descriptor for that shape into the shape list.

Parameters

sd	Pointer to a shape descriptor.
od	Object descriptor.

Returns: Pointer to created shape.

◆ BroadPhase()

void CObjectManager::BroadPhase ( std::vector< CShape * > v[] )

private

Do collision detection for all dynamic shapes against all static and kinematic shapes, and against all dynamic shapes that appear after it in the dynamic shape list.

Parameters

v	Array of pointers to vectors of static, kinematic, and dynamic shapes.

◆ BroadPhaseWithQuadtree()

void CObjectManager::BroadPhaseWithQuadtree ( )

private

Broad phase collision detection and response using a quadtree. Assembles a vector of pointers to quadtree leaves that have at least a dynamic shape and one other shape in them, then does broad phase on the shapes in those leaves.

◆ clear()

void CObjectManager::clear ( )

Delete all dynamic shapes and objects.

◆ Draw()

void CObjectManager::Draw ( )

Draw the game objects using Painter's Algorithm. The background is drawn first, then the game objects are asked to draw themselves in the order that they are in the object list. That is, they are drawn from back to front. Draw everything, the tangents, the sectors, the AABBs, the shapes, the tracks, the reticles, the impact points (etc.).

◆ DrawAABBs()

void CObjectManager::DrawAABBs ( )

private

Draw all AABBs in the AABB list.

◆ DrawObject()

void CObjectManager::DrawObject ( CObject * p )

private

Line segments get special treatment because they are drawn using CRenderer's DrawLine function instead of its Draw function.

Parameters

p	Pointer to an object.

◆ DrawSectors()

void CObjectManager::DrawSectors ( )

private

Draw all sectors in the sector list.

◆ DrawTangents()

void CObjectManager::DrawTangents ( )

private

Draw all tangents in the tangent list.

◆ GetAABBTestCnt()

UINT CObjectManager::GetAABBTestCnt ( )

Get the number of AABB intersection tests since the count was last reset and reset count to zero. This includes both ball-to-ball collisions plus the extra overhead of AABB intersection tests from managing the quadtree.

Returns: Number of tests.

◆ GetCollisionCnt()

UINT CObjectManager::GetCollisionCnt ( )

Get the number of collisions since the count was last reset and reset count to zero.

Returns: Number of collisions.

◆ GetCollisionTestCnt()

UINT CObjectManager::GetCollisionTestCnt ( )

Get the number of collision tests since the count was last reset and reset count to zero.

Returns: Number of tests.

◆ GetLostBallCnt()

UINT CObjectManager::GetLostBallCnt ( ) const

Reader function for the number of lost balls, which is defined to be those that have strayed outside m_cAABB.

Returns: Number of lost balls.

◆ GetOverlapCnt()

UINT CObjectManager::GetOverlapCnt ( ) const

Reader function for the overlap count.

Returns: Number of overlapped balls.

◆ GetQTLeafCount()

UINT CObjectManager::GetQTLeafCount ( ) const

Reader function for the number of leaves in the quadtree.

Returns: Number of quadtree leaves.

◆ GetQTLevelCount()

UINT CObjectManager::GetQTLevelCount ( ) const

Reader function for the number of levels in the quadtree.

Returns: Numer of quadtree levels.

◆ GetQTMaxLeafSize()

UINT CObjectManager::GetQTMaxLeafSize ( ) const

Reader function for the maximum number of objects in a leaf.

Returns: Maximum over all leaves of the number of objects in it.

◆ GetQTNodeArea()

Vector2 CObjectManager::GetQTNodeArea ( ) const

Reader function for the width and height of the area covered by each quadtree leaf.

Returns: Quadtree leaf area.

◆ GetQTNodeCount()

UINT CObjectManager::GetQTNodeCount ( ) const

Reader function for the number of nodes in the quadtree including both leaves and non-leaves.

Returns: Number of quadtree nodes.

◆ MakeLineSeg()

void CObjectManager::MakeLineSeg	(	const Vector2 &	p0,
		const Vector2 &	p1,
		eSound	snd
	)

Make a compound shape consisting of a line segment and two guard points.

Parameters

p0	One end of line segment.
p1	The other end of line segment.
snd	Sound to be played on collision.

◆ MakeShape()

CShape * CObjectManager::MakeShape	(	CShapeDesc *	sd,
		const CObjDesc &	od
	)

private

Create a new shape and a contact descriptor for that shape.

Parameters

sd	Pointer to a shape descriptor.
od	An object descriptor.

Returns: Pointer to a new contact descriptor.

◆ MakeShapes()

void CObjectManager::MakeShapes ( )

Make the static shapes for the things in the world. As with most physics code, this function is long and tedious, but it's important to get the details right.

◆ MakeWorldEdges()

void CObjectManager::MakeWorldEdges ( )

Make the static shapes for the world boundaries. As with most physics code, this function is long and tedious, but it's important to get the details right.

◆ move()

void CObjectManager::move ( )

Move all dynamic and kinematic shapes and perform broad phase collision and response.

◆ NarrowPhase()

bool CObjectManager::NarrowPhase	(	CShape *	pShape,
		CDynamicCircle *	pCirc
	)

private

Check whether a shape collides with a dynamic circle and make appropriate response.

Parameters

pShape	Pointer to a shape.
pCirc	Pointer to dynamic circle.

◆ ResetQuadTree()

void CObjectManager::ResetQuadTree ( UINT n )

Reset the quadtree to a given number of levels.

Parameters

n	Number of levels for the new quadtree.

◆ RotateKinematic()

void CObjectManager::RotateKinematic ( bool b )

Set the rotating flag in all kinematic shapes.

Parameters

b	true for rotating, false for not rotating.

◆ UpdateQuadtree()

void CObjectManager::UpdateQuadtree ( )

Update the quadtree to account for kinematic and dynamic shapes dynamic. It clears the kinematic and dynamic shapes out of the quadtree (since their positions and/or orientations have changed) and re-inserts them.

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~CObjectManager()

Member Function Documentation

◆ AddShape()

◆ BroadPhase()

◆ BroadPhaseWithQuadtree()

◆ clear()

◆ Draw()

◆ DrawAABBs()

◆ DrawObject()

◆ DrawSectors()

◆ DrawTangents()

◆ GetAABBTestCnt()

◆ GetCollisionCnt()

◆ GetCollisionTestCnt()

◆ GetLostBallCnt()

◆ GetOverlapCnt()

◆ GetQTLeafCount()

◆ GetQTLevelCount()

◆ GetQTMaxLeafSize()

◆ GetQTNodeArea()

◆ GetQTNodeCount()

◆ MakeLineSeg()

◆ MakeShape()

◆ MakeShapes()

◆ MakeWorldEdges()

◆ move()

◆ NarrowPhase()

◆ ResetQuadTree()

◆ RotateKinematic()

◆ UpdateQuadtree()