Shapes::CDynamicCircle Class Reference

Dynamic circle. More...

#include <DynamicCircle.h>

Inheritance diagram for Shapes::CDynamicCircle:

Collaboration diagram for Shapes::CDynamicCircle:

Public Member Functions
	CDynamicCircle (const CDynamicCircleDesc &)
	Constructor.
void	move ()
	Move using Euler integration.
const bool	AABBCollide (CDynamicCircle *) const
	Collide detection using AABBs.
void	CollisionResponse (const CContactDesc &)
	Collision response.
const Vector2	GetVel () const
	Get velocity.
void	SetVel (const Vector2 &)
	Set velocity.
Public Member Functions inherited from Shapes::CCircle
	CCircle (const CCircleDesc &)
	Constructor.
const bool	CollisionDetected (CContactDesc &) const
	Collision detection.
const bool	PtInCircle (const Vector2 &) const
	Point in circle test.
const Vector2	ClosestPt (const Vector2 &) const
	Closest point on circle.
const bool	Tangents (const Vector2 &, Vector2 &, Vector2 &) const
	Tangents through external point.
const bool	Tangents (const CCircle *, CLineSegDesc &, CLineSegDesc &) const
	Common tangents.
const bool	Tangent (const CCircle *, CLineSegDesc &) const
	Common tangent.
const float	GetRadius () const
	Get radius.
Public Member Functions inherited from Shapes::CShape
	CShape (const CShapeDesc &)
	Constructor.
virtual	~CShape ()
	Destructor.
const eShape	GetShapeType () const
	Get shape type.
const eMotion	GetMotionType () const
	Get motion type.
const CAabb2D &	GetAABB () const
	Get AABB.
const bool	GetSensor () const
	Is this shape a sensor?
const Vector2 &	GetPos () const
	Get position.
void	SetPos (const Vector2 &)
	Set position.
void	SetAABBPoint (const Vector2 &)
	Set AABB point.
void	AddAABBPoint (const Vector2 &)
	Add AABB point.
void	SetCanCollide (bool=true)
	Turn collisions on or off.
const bool	GetCanCollide () const
	Get whether shape can collide.
const bool	GetRotating () const
	Get whether rotating.
void	SetRotating (bool)
	Start or stop rotating.
const float	GetOrientation () const
	Get orientation.
void	SetOrientation (float)
	Set orientation.
const float	GetRotSpeed () const
	Get rotation speed.
void	SetRotSpeed (float)
	Set rotation speed.
const Vector2 &	GetRotCenter () const
	Get rotation speed.
void	SetRotCenter (const Vector2 &)
	Set center of rotation.
const float	GetElasticity () const
	Get elasticity.
void *	GetUserPtr () const
	Get user pointer.
void	SetUserPtr (void *)
	Set user pointer.
virtual void	Rotate (const Vector2 &, float)
	Rotate.
virtual void	Reset ()
	Reset orientation.

Private Member Functions
void	CollisionResponseStatic (const CContactDesc &)
	Collision response for static shape.
void	CollisionResponseKinematic (const CContactDesc &)
	Collision response for kinematic shape.
void	CollisionResponseDynamic (const CContactDesc &)
	Collision response for dynamic shape.

Private Attributes
Vector2	m_vVel
	Velocity. Speed is measured in pixels per second.
float	m_fMass = 0.0f
	Mass.

Additional Inherited Members
Protected Attributes inherited from Shapes::CCircle
float	m_fRadius = 0.0f
	Radius.
float	m_fRadiusSq = 0.0f
	Radius squared, for fast distance calc.
Protected Attributes inherited from Shapes::CShape
eShape	m_eShapeType = eShape::Unknown
	Type of shape.
eMotion	m_eMotionType = eMotion::Static
	How shape moves.
float	m_fElasticity = 1.0f
	Elasticity, aka restitution, bounciness.
bool	m_bIsSensor = false
	Sensor only, no rebound on collision.
CAabb2D	m_cAABB
	Axially aligned bounding box in World Space.
bool	m_bCanCollide = true
	Can collide with other shapes.
float	m_fOrientation = 0.0f
	Orientation angle.
void *	m_pUser
	Spare pointer for user in case they might need one.
Vector2	m_vRotCenter
	Center of rotation.
float	m_fRotSpeed = 0.0f
	Rotation speed.
bool	m_bRotating = false
	Whether rotating.
Static Protected Attributes inherited from Shapes::CShapeCommon
static float	m_fGravity = 0.0f
	Gravitational constant.
static float	m_fTimeStep = 0.0f
	Time step per animation frame (fictional).

Detailed Description

A dynamic circle is a circle shape that moves and can collide with static, kinematic, and dynamic shapes.

Constructor & Destructor Documentation

CDynamicCircle()

CDynamicCircle::CDynamicCircle

(

const CDynamicCircleDesc &

r

)

Constructs a dynamic circle described by a dynamic circle descriptor.

Parameters

r	Dynamic circle descriptor.

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Member Function Documentation

AABBCollide()

const bool CDynamicCircle::AABBCollide

(

CDynamicCircle *

pCirc

)

const

Does the AABB for this dynamic circle overlap the AABB for another dynamic circle?

Parameters

pCirc

Pointer to a dynamic circle.

Returns

true if their AABBs overlap.

CollisionResponse()

void CDynamicCircle::CollisionResponse

(

const CContactDesc &

cd

)

Collision response for a dynamic circle colliding with a shape.

Parameters

cd	Contact descriptor which has been filled in by collision detection.

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CollisionResponseDynamic()

void CDynamicCircle::CollisionResponseDynamic ( const CContactDesc & cd )

private

Collision response for a dynamic circle colliding with a dynamic shape.

Parameters

cd	Contact descriptor which has been filled in by collision detection.

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CollisionResponseKinematic()

void CDynamicCircle::CollisionResponseKinematic ( const CContactDesc & cd )

private

Collision response for a dynamic circle colliding with a kinematic shape. This circle's velocity is affected by the kinematic shape's rotation. This code assumes that all elasticities are less than unity.

Parameters

cd	Contact descriptor that has been filled in by collision detection.

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CollisionResponseStatic()

void CDynamicCircle::CollisionResponseStatic ( const CContactDesc & cd )

private

Collision response for a dynamic circle colliding with a static shape.

Parameters

cd	Contact descriptor which has been filled in by collision detection.

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GetVel()

const Vector2 CDynamicCircle::GetVel

(

)

const

Reader function for the velocity.

Returns

The velocity.

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move()

void CDynamicCircle::move ( )

virtual

Move the shape using Euler integration, depending on the physics time step and the gravity constant.

Reimplemented from Shapes::CShape.

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SetVel()

void CDynamicCircle::SetVel

(

const Vector2 &

v

)

Set the velocity to a new value.

Parameters

v	New velocity.