CGate Class Reference

A gate. More...

#include <Gate.h>

Inheritance diagram for CGate:

Collaboration diagram for CGate:

Public Member Functions
	CGate (Shapes::CLineSeg *)
	Constructor.
	~CGate ()
	Destructor.
bool	NarrowPhase (Shapes::CDynamicCircle *)
	Narrow phase.

Private Attributes
Shapes::CLineSeg *	m_pLineSeg = nullptr
	Pointer to line segment.

Additional Inherited Members
Static Protected Attributes inherited from CCommon
static Sage::CSpriteRenderer *	m_pRenderer = nullptr
	Pointer to the renderer.
static CObjectManager *	m_pObjectManager = nullptr
	Pointer to the object manager.
static Sage::CParticleEngine2D *	m_pFrontParticleEngine = nullptr
	Ptr to front particle engine.
static Sage::CParticleEngine2D *	m_pBackParticleEngine = nullptr
	Ptr to back 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 gate allows circles to cross in one direction only. It's essentially a line segment with some code that handles the crossing-in-one-direction requirement. More specifically, if the circle's velocity is in the opposite direction to the line segment's normal vector CLineSeg::m_vNormal and the circle's speed is larger than some threshold, then the circle passes through. Otherwise it bounces off of the line segment. Recall that the direction of CLineSeg::m_vNormal depends on the order in which CLineSeg's end points were specified, so make sure you get it right.

Constructor & Destructor Documentation

CGate()

CGate::CGate

(

Shapes::CLineSeg *

p

)

Construct a closed and unlatched gate from a line segment.

Parameters

p	Pointer to a line segment.

Member Function Documentation

NarrowPhase()

bool CGate::NarrowPhase

(

Shapes::CDynamicCircle *

p

)

If a dynamic circle collides with a gate and it is moving in the correct direction and is fast enough, then the gate opens and the dynamic circle is allowed through. Otherwise the dynamic circle bounces off the gate as usual.

Parameters

p	Pointer to a dynamic circle.

Returns

true if the dynamic circle intersects the gate.

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