CMyListener Class Reference

My contact listener.

#include <ContactListener.h>

Inheritance diagram for CMyListener:

Collaboration diagram for CMyListener:

Public Member Functions
void	PreSolve (b2Contact *, const b2Manifold *)
	Presolve function.

Private Member Functions
const UINT	Count (eSprite) const
	Count number of bodies that have sprite type t.
const float	GetSpeed (const b2Vec2 &) const
	Get the collision speed.

Private Attributes
b2Body *	m_pBodyA = nullptr
	Pointer to body A.
b2Body *	m_pBodyB = nullptr
	Pointer to body B.

Additional Inherited Members
Static Protected Attributes inherited from CCommon
static CBox2DRenderer *	m_pRenderer = nullptr
	Pointer to the Renderer.
static Sage::CParticleEngine2D *	m_pParticleEngine = nullptr
	Pointer to particle engine.
static b2World *	m_pPhysicsWorld = nullptr
	Pointer to Box2D Physics World.
static CObjectManager *	m_pObjectManager = nullptr
	Pointer to the Object Manager.
static eDrawMode	m_eDrawMode = eDrawMode::Sprites
	Draw mode.

Member Function Documentation

Count()

const UINT CMyListener::Count ( eSprite t ) const

private

Count the number of bodies out of *m_pBodyA and *m_pBodyB that have objects have a given sprite type. Returns 0, 1, or 2, of course.

Parameters

t	Sprite Type.

Returns

Number of *m_pBodyA and *m_pBodyB that have type t.

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GetSpeed()

const float CMyListener::GetSpeed ( const b2Vec2 & p ) const

private

Get the collision speed, which is proportional to the magnitude of the relative velocity of the two bodies colliding.

Parameters

p	World point, required by Box2D for some arcane reason.

Returns

Collision speed in Physics World units.

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PreSolve()

void CMyListener::PreSolve	(	b2Contact *	c,
		const b2Manifold *	m )

Presolve function. Renders a colored star at each contact point and plays the appropriate sound, depending on what type of objects are contacting.

Parameters

c	Pointer to the contact.
m	Pointer to the old contact manifold as it was before this contact.

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