CGear Class Reference

A system of interlocking gears. More...

#include <Gear.h>

Inheritance diagram for CGear:

Collaboration diagram for CGear:

Public Member Functions
	CGear ()
	Constructor.
	~CGear ()
	Destructor.
void	Action ()
	Reverse gears.
Public Member Functions inherited from CLevel
	CLevel (eSprite)
virtual	~CLevel ()
	Default constructor.
virtual void	Move ()
	Destructor.
virtual void	Draw ()
	Draw objects in level.

Private Member Functions
b2Body *	CreateBase (float, float)
	Create invisible base.
void	CreateRoundGears (float, float)
	Create round gears.
void	CreateSquareGears (float, float)
	Create square gears.
b2Body *	CreateGear (float, float, eSprite)
	Create gear.
void	CreateGearJoint (UINT, UINT, float)
	Create gear joint.

Private Attributes
std::vector< b2RevoluteJoint * >	m_stdJoint
	Revolute joint pointers.
b2Body *	m_pBase = nullptr
	Pointer to invisible background body.

Additional Inherited Members
Protected Member Functions inherited from CLevel
CLineObject *	CreateLine (b2Body *, const b2Vec2 &, bool, b2Body *, const b2Vec2 &, bool)
	Create new line object.
Protected Attributes inherited from CLevel
std::vector< CObject * >	m_stdObject
	Object pointers.
std::vector< CLineObject * >	m_stdLine
	Line list.
eSprite	m_eBgSprite
	Type of background sprite.
Static Protected Attributes inherited from CCommon
static b2World *	m_pPhysicsWorld = nullptr
	Pointer to Box2D Physics World.
static CBox2DRenderer *	m_pRenderer = nullptr
	Pointer to the renderer.
static CLevel *	m_pLevel = nullptr
	Pointer to current level.
static eLevel	m_eCurLevel = eLevel::Windmill
	Current level.
static eDrawMode	m_eDrawMode = eDrawMode::Sprites
	Draw mode.

Detailed Description

The number and positions of the gears are hard-coded but since we use std::vector for storage, it is fairly easy to add more if you want them.

Constructor & Destructor Documentation

~CGear()

CGear::~CGear

(

)

The only thing that needs to be cleaned up here is the physics body for the base, which is the invisible background to which we attach our revolute joints. The other physics bodies are cleaned up in the CObject destructor.

Member Function Documentation

Action()

void CGear::Action ( )

virtual

Reverse the gears by setting the motor speed on the revolute joint for the first gear.

Reimplemented from CLevel.

CreateBase()

b2Body * CGear::CreateBase ( float x, float y )

private

Create an invisible base to attach the largest gear wheel to. The base has no sprite and no shape in Physics World. The latter means it doesn't collide with anything.

Parameters

x	X coordinate in Physics World units.
y	Y coordinate in Physics World units.

Returns

Pointer to the cog wheel body in Physics World.

Here is the caller graph for this function:

CreateGear()

b2Body * CGear::CreateGear ( float x, float y, eSprite t )

private

Create a gear wheel at a given position in Physics World.

Parameters

x	X coordinate in Physics World units.
y	Y coordinate in Physics World units.
t	Sprite type of the gear wheel.

Returns

Pointer to the cog wheel body in Physics World.

Here is the call graph for this function:

Here is the caller graph for this function:

CreateGearJoint()

void CGear::CreateGearJoint ( UINT i, UINT j, float r )

private

Create a gear joint between two of the revolute joints in m_stdJoint.

Parameters

i	Index of first revolute joint and body attached to it.
j	Index of second revolute joint and body attached to it.
r	Gear ratio.

Here is the caller graph for this function:

CreateRoundGears()

void CGear::CreateRoundGears ( float x, float y )

private

Create the round gears and push them onto the gear list. It is assumed that this function is called first and that the driving gear (the one with the motor on its revolute joint) is to be the first one on the gear list.

Parameters

x	X coordinate in Physics World units.
y	Y coordinate in Physics World units.

Here is the call graph for this function:

Here is the caller graph for this function:

CreateSquareGears()

void CGear::CreateSquareGears ( float x, float y )

private

Create the square gears and push them onto the gear list.

Parameters

x	X coordinate in Physics World units.
y	Y coordinate in Physics World units.

Here is the call graph for this function:

Here is the caller graph for this function: