CPulley Class Reference

The pulley class. More...

#include <Pulley.h>

Inheritance diagram for CPulley:

Public Member Functions
	CPulley (float, float, float)
	Constructor. More...
void	move ()
	Rotate the pulley wheels. More...
void	CreateElephant ()
	Create an elephant. More...
bool	DeleteElephant ()
	Delete an elephant. More...

Private Member Functions
b2Body *	CreateWheel (float, float)
	Create a pulley wheel. More...
b2Body *	CreateCrate (float, float)
	Create the elephant's crate. More...
b2Body *	CreateObject (const b2Vec2 &, float, eSprite)
	Create an object. More...

Private Attributes
b2PulleyJoint *	m_pJoint = nullptr
	Pointer to the pulley joint.
float	m_fJointLenA = 0
	Length of left side of pulley.
b2Body *	m_pWheel0 = nullptr
	Pointer to the left pulley wheel.
b2Body *	m_pWheel1 = nullptr
	Pointer to the right pulley wheel.
float	m_fWheelRad = 1
	Pulley wheel radius.
b2Vec2	m_vElephantSpawnPt
	Elephant spawn point.

Additional Inherited Members
Static Protected Attributes inherited from CCommon
static b2World *	m_pPhysicsWorld = nullptr
	Pointer to Box2D Physics World.
static CRenderer *	m_pRenderer = nullptr
	Pointer to the renderer.
static CObjectManager *	m_pObjectManager = nullptr
	Pointer to the object manager.
static CWindmill *	m_pWindmill = nullptr
	Pointer to windmill.
static CGear *	m_pGear = nullptr
	Pointer to gear system.
static CNautilusGear *	m_pNautilusGear = nullptr
	Pointer to Nautilus gear system.
static CRackAndPinion *	m_pRackAndPinion = nullptr
	Pointer to rack-and-pinion.
static CCar *	m_pCar = nullptr
	Pointer to car.
static CRamp *	m_pRamp = nullptr
	Pointer to ramp.
static CNewtonsCradle *	m_pNewtonsCradle = nullptr
	Pointer to Newton's Cradle.
static CPulley *	m_pPulley = nullptr
	Pointer to pulley system.
static eLevel	m_eCurLevel = eLevel::Windmill
	Current level.

Detailed Description

The pulley class.

A pair of objects connected by a pulley joint, with a pair of pulley wheels that are animated in code.

Constructor & Destructor Documentation

CPulley()

CPulley::CPulley	(	float	x,
		float	y,
		float	w
	)

Constructor.

Parameters

x	X coordinate in Physics World units.
y	Y coordinate in Physics World units.
w	Pulley wheel horizontal separation in Physics World units.

Member Function Documentation

CreateCrate()

b2Body * CPulley::CreateCrate ( float  x, float  y  )

private

Create the elephant's crate.

The bucket is the thing on the left that the elephant falls into. It consists of a left side, a right side, and a bottom, all of which are rectangles.

Parameters

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

Returns

Pointer to physics body.

CreateElephant()

void CPulley::CreateElephant

(

)

Create an elephant.

Create an elephant at its spawn point offset by a small pseudorandom amount to make the crate swing a bot.

CreateObject()

b2Body * CPulley::CreateObject ( const b2Vec2 &  v, float  d, eSprite  t  )

private

Create an object.

Create an object, used for the safe and the elephant.

Parameters

v	Position in Physics World.
d	Object density.
t	Type of object to be created.

Returns

Pointer to physics body.

CreateWheel()

b2Body * CPulley::CreateWheel ( float  x, float  y  )

private

Create a pulley wheel.

The pulley wheels are going to be static objects that we rotate ourselves depending on the positions of the objects that the pulley is attached to.

Parameters

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

Returns

Pointer to physics body.

DeleteElephant()

bool CPulley::DeleteElephant

(

)

Delete an elephant.

Delete the first elephant, if there is one.

Returns

true if there was an elephant.

move()

void CPulley::move

(

)

Rotate the pulley wheels.

Animate the pulley wheels by setting their orientations to reflect the amount of rope that has gone over them.