2D Nodes

Classes
class	AnimationFrame
class	Animation
class	AnimationCache
	Singleton that manages the Animations. More...
class	AtlasNode
	AtlasNode is a subclass of Node that implements the RGBAProtocol and TextureProtocol protocol. More...
class	PolygonInfo
	PolygonInfo is an object holding the required data to display Sprites. More...
class	AutoPolygon
	AutoPolygon is a helper Object AutoPolygon's purpose is to process an image into 2d polygon mesh in runtime It has functions for each step in the process, from tracing all the points, to triangulation the result can be then passed to Sprite::create() to create a Polygon Sprite. More...
class	ClippingNode
	ClippingNode is a subclass of Node. More...
class	ClippingRectangleNode
	Clipping Rectangle Node. More...
class	DrawNode
	Node that draws dots, segments and polygons. Faster than the "drawing primitives" since they draws everything in one single batch. More...
class	FastTMXLayer
	FastTMXLayer represents the TMX layer. More...
class	FastTMXTiledMap
	FastTMXTiledMap knows how to parse and render a TMX map. More...
class	GridBase
	Base class for Other grid. More...
class	Grid3D
	Grid3D is a 3D grid implementation. More...
class	TiledGrid3D
	TiledGrid3D is a 3D grid implementation. More...
class	Label
	Label is a subclass of Node that knows how to render text labels. More...
class	LabelAtlas
	LabelAtlas is a subclass of AtlasNode. More...
class	Layer
	Layer is a subclass of Node that implements the TouchEventsDelegate protocol. More...
class	LayerColor
	LayerColor is a subclass of Layer that implements the RGBAProtocol protocol. More...
class	LayerGradient
	LayerGradient is a subclass of LayerColor that draws gradients across the background. More...
class	LayerRadialGradient
	LayerRadialGradient is a subclass of Layer that draws radial gradients across the background. More...
class	LayerMultiplex
	MultipleLayer is a Layer with the ability to multiplex it's children. Features: More...
class	Menu
	A Menu for touch handling. More...
class	MenuItem
	MenuItem base class. More...
class	MenuItemLabel
	An abstract class for "label" MenuItemLabel items. More...
class	MenuItemAtlasFont
	A MenuItemAtlasFont. More...
class	MenuItemFont
	A MenuItemFont. More...
class	MenuItemSprite
	MenuItemSprite accepts Node<RGBAProtocol> objects as items. More...
class	MenuItemImage
	MenuItemImage accepts images as items. More...
class	MenuItemToggle
	A MenuItemToggle. More...
class	MotionStreak
	Creates a trailing path. More...
class	Node
	Node is the base element of the Scene Graph. Elements of the Scene Graph must be Node objects or subclasses of it. The most common Node objects are: Scene, Layer, Sprite, Menu, Label. More...
class	NodeGrid
	Base class for Grid Node. More...
class	ParallaxNode
	ParallaxNode: A node that simulates a parallax scroller. More...
class	ParticleBatchNode
	ParticleBatchNode is like a batch node: if it contains children, it will draw them in 1 single OpenGL call (often known as "batch draw"). More...
class	ParticleFire
	A fire particle system. More...
class	ParticleFireworks
	A fireworks particle system. More...
class	ParticleSun
	A sun particle system. More...
class	ParticleGalaxy
	A galaxy particle system. More...
class	ParticleFlower
	A flower particle system. More...
class	ParticleMeteor
	A meteor particle system. More...
class	ParticleSpiral
	An spiral particle system. More...
class	ParticleExplosion
	An explosion particle system. More...
class	ParticleSmoke
	An smoke particle system. More...
class	ParticleSnow
	An snow particle system. More...
class	ParticleRain
	A rain particle system. More...
class	ParticleSystem
	Particle System base class. Attributes of a Particle System: More...
class	ParticleSystemQuad
	ParticleSystemQuad is a subclass of ParticleSystem. More...
class	ProgressTimer
	ProgressTimer is a subclass of Node. More...
class	ProtectedNode
	A inner node type mainly used for UI module. More...
class	RenderTexture
	RenderTexture is a generic rendering target. More...
class	Scene
	Scene is a subclass of Node that is used only as an abstract concept. More...
class	Sprite
	Sprite is a 2d image ( http://en.wikipedia.org/wiki/Sprite_(computer_graphics) ). More...
class	SpriteBatchNode
	SpriteBatchNode is like a batch node: if it contains children, it will draw them in 1 single OpenGL call (often known as "batch draw"). More...
class	SpriteFrame
	A SpriteFrame has: More...
class	SpriteFrameCache
	Singleton that handles the loading of the sprite frames. More...
class	TMXLayer
	TMXLayer represents the TMX layer. More...
class	TMXObjectGroup
	TMXObjectGroup represents the TMX object group. More...
class	TMXTiledMap
	TMXTiledMap knows how to parse and render a TMX map. More...
class	TransitionEaseScene
	TransitionEaseScene can ease the actions of the scene protocol. More...
class	TransitionScene
	Base class for Transition scenes. More...
class	TransitionSceneOriented
	A Transition that supports orientation like. Possible orientation: LeftOver, RightOver, UpOver, DownOver. More...
class	TransitionRotoZoom
	TransitionRotoZoom: Rotate and zoom out the outgoing scene, and then rotate and zoom in the incoming. More...
class	TransitionJumpZoom
	TransitionJumpZoom: Zoom out and jump the outgoing scene, and then jump and zoom in the incoming. More...
class	TransitionMoveInL
	TransitionMoveInL: Move in from to the left the incoming scene. More...
class	TransitionMoveInR
	TransitionMoveInR: Move in from to the right the incoming scene. More...
class	TransitionMoveInT
	TransitionMoveInT: Move in from to the top the incoming scene. More...
class	TransitionMoveInB
	TransitionMoveInB: Move in from to the bottom the incoming scene. More...
class	TransitionSlideInL
	TransitionSlideInL: Slide in the incoming scene from the left border. More...
class	TransitionSlideInR
	TransitionSlideInR: Slide in the incoming scene from the right border. More...
class	TransitionSlideInB
	TransitionSlideInB: Slide in the incoming scene from the bottom border. More...
class	TransitionSlideInT
	TransitionSlideInT: Slide in the incoming scene from the top border. More...
class	TransitionShrinkGrow
	Shrink the outgoing scene while grow the incoming scene. More...
class	TransitionFlipX
	TransitionFlipX: Flips the screen horizontally. The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionFlipY
	TransitionFlipY: Flips the screen vertically. The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionFlipAngular
	TransitionFlipAngular: Flips the screen half horizontally and half vertically. The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionZoomFlipX
	TransitionZoomFlipX: Flips the screen horizontally doing a zoom out/in The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionZoomFlipY
	TransitionZoomFlipY: Flips the screen vertically doing a little zooming out/in The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionZoomFlipAngular
	TransitionZoomFlipAngular: Flips the screen half horizontally and half vertically doing a little zooming out/in. The front face is the outgoing scene and the back face is the incoming scene. More...
class	TransitionFade
	TransitionFade: Fade out the outgoing scene and then fade in the incoming scene.'''. More...
class	TransitionCrossFade
	TransitionCrossFade: Cross fades two scenes using the RenderTexture object. More...
class	TransitionTurnOffTiles
	TransitionTurnOffTiles: Turn off the tiles of the outgoing scene in random order. More...
class	TransitionSplitCols
	TransitionSplitCols: The odd columns goes upwards while the even columns goes downwards. More...
class	TransitionSplitRows
	TransitionSplitRows: The odd rows goes to the left while the even rows goes to the right. More...
class	TransitionFadeTR
	TransitionFadeTR: Fade the tiles of the outgoing scene from the left-bottom corner the to top-right corner. More...
class	TransitionFadeBL
	TransitionFadeBL: Fade the tiles of the outgoing scene from the top-right corner to the bottom-left corner. More...
class	TransitionFadeUp
	TransitionFadeUp: Fade the tiles of the outgoing scene from the bottom to the top. More...
class	TransitionFadeDown
	TransitionFadeDown: Fade the tiles of the outgoing scene from the top to the bottom. More...
class	TransitionPageTurn
	A transition which peels back the bottom right hand corner of a scene to transition to the scene beneath it simulating a page turn. More...
class	TransitionProgress
	A base class of progress transition. More...
class	TransitionProgressRadialCCW
	TransitionRadialCCW transition. A counter clock-wise radial transition to the next scene. More...
class	TransitionProgressRadialCW
	TransitionRadialCW transition. A counter clock-wise radial transition to the next scene. More...
class	TransitionProgressHorizontal
	TransitionProgressHorizontal transition. A clock-wise radial transition to the next scene. More...
class	TransitionProgressVertical
	TransitionProgressVertical transition. More...
class	TransitionProgressInOut
	TransitionProgressInOut transition. More...
class	TransitionProgressOutIn
	TransitionProgressOutIn transition. More...
class	Texture2D
	Texture2D class. More...
class	TextureAtlas
	A class that implements a Texture Atlas. More...
class	TextureCache
	Singleton that handles the loading of textures. More...
struct	sParticle

Enumerations
enum	{ TMXOrientationOrtho, TMXOrientationHex, TMXOrientationIso, TMXOrientationStaggered }
	Possible orientations of the TMX map. More...
enum	{ TMXStaggerAxis_X, TMXStaggerAxis_Y }
	Possible stagger axis of the TMX map. More...
enum	{ TMXStaggerIndex_Odd, TMXStaggerIndex_Even }
	Possible stagger index of the TMX map. More...

Functions
PolygonInfo &	operator= (const PolygonInfo &other)
	Copy the member of the other PolygonInfo. More...
void	setQuad (V3F_C4B_T2F_Quad *quad)
	set the data to be a pointer to a quad the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects More...
void	setQuads (V3F_C4B_T2F_Quad *quads, int numberOfQuads)
	set the data to be a pointer to a number of Quads the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects More...
void	setTriangles (const TrianglesCommand::Triangles &triangles)
	set the data to be a pointer to a triangles the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects More...
unsigned int	getVertCount () const
	get vertex count More...
unsigned int	getTrianglesCount () const
	get triangles count More...
float	getArea () const
	get sum of all triangle area size More...
	AutoPolygon (const std::string &filename)
	create an AutoPolygon and initialize it with an image file the image must be a 32bit PNG for current version 3.7 More...
	~AutoPolygon ()
	Destructor of AutoPolygon.
std::vector< Vec2 >	trace (const cocos2d::Rect &rect, float threshold=0.0f)
	trace all the points along the outline of the image, More...
std::vector< Vec2 >	reduce (const std::vector< Vec2 > &points, const Rect &rect, float epsilon=2.0f)
	reduce the amount of points so its faster for GPU to process and draw based on Ramer-Douglas-Peucker algorithm More...
std::vector< Vec2 >	expand (const std::vector< Vec2 > &points, const Rect &rect, float epsilon)
	expand the points along their edge, useful after you reduce the points that cuts into the sprite using ClipperLib More...
TrianglesCommand::Triangles	triangulate (const std::vector< Vec2 > &points)
	Triangulate the input points into triangles for rendering using poly2tri. More...
void	calculateUV (const Rect &rect, V3F_C4B_T2F *verts, ssize_t count)
	calculate the UV coordinates for each points based on a texture rect More...
PolygonInfo	generateTriangles (const Rect &rect=Rect::ZERO, float epsilon=2.0f, float threshold=0.05f)
	a helper function, packing trace, reduce, expand, triangulate and calculate uv in one function More...
static PolygonInfo	generatePolygon (const std::string &filename, const Rect &rect=Rect::ZERO, float epsilon=2.0f, float threshold=0.05f)
	a helper function, packing autoPolygon creation, trace, reduce, expand, triangulate and calculate uv in one function More...
bool	isScreenPointInRect (const Vec2 &pt, const Camera *camera, const Mat4 &w2l, const Rect &rect, Vec3 *p)
	This is a helper function, checks a GL screen point is in content rectangle space. More...

Creators
	PolygonInfo ()
	Creates an empty Polygon info. More...
	PolygonInfo (const PolygonInfo &other)
	Create an polygoninfo from the data of another Polygoninfo. More...

Detailed Description

Enumeration Type Documentation

anonymous enum

anonymous enum

Possible orientations of the TMX map.

Enumerator
TMXOrientationOrtho	Orthogonal orientation.
TMXOrientationHex	Hexagonal orientation.
TMXOrientationIso	Isometric orientation.
TMXOrientationStaggered	Isometric staggered orientation.

anonymous enum

anonymous enum

Possible stagger axis of the TMX map.

Enumerator
TMXStaggerAxis_X	Stagger Axis x.
TMXStaggerAxis_Y	Stagger Axis y.

anonymous enum

anonymous enum

Possible stagger index of the TMX map.

Enumerator
TMXStaggerIndex_Odd	Stagger Index: Odd.
TMXStaggerIndex_Even	Stagger Index: Even.

Function Documentation

PolygonInfo() [1/2]

PolygonInfo

(

)

Creates an empty Polygon info.

Returns

PolygonInfo object

PolygonInfo() [2/2]

PolygonInfo

(

const PolygonInfo &

other

)

Create an polygoninfo from the data of another Polygoninfo.

Parameters

other

another PolygonInfo to be copied

Returns

duplicate of the other PolygonInfo

operator=()

PolygonInfo& operator=

(

const PolygonInfo &

other

)

Copy the member of the other PolygonInfo.

Parameters

other

another PolygonInfo to be copied

setQuad()

void setQuad

(

V3F_C4B_T2F_Quad *

quad

)

set the data to be a pointer to a quad the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects

Parameters

quad	a pointer to the V3F_C4B_T2F_Quad object

setQuads()

void setQuads	(	V3F_C4B_T2F_Quad *	quads,
		int	numberOfQuads
	)

set the data to be a pointer to a number of Quads the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects

Parameters

quad	a pointer to the V3F_C4B_T2F_Quad quads

setTriangles()

void setTriangles

(

const TrianglesCommand::Triangles &

triangles

)

set the data to be a pointer to a triangles the member verts will not be released when this PolygonInfo destructs as the verts memory are managed by other objects

Parameters

triangles

a pointer to the TrianglesCommand::Triangles object

getVertCount()

unsigned int getVertCount

(

)

const

get vertex count

Returns

number of vertices

getTrianglesCount()

unsigned int getTrianglesCount

(

)

const

get triangles count

Returns

number of triangles

getArea()

float getArea

(

)

const

get sum of all triangle area size

Returns

sum of all triangle area size

AutoPolygon()

AutoPolygon

(

const std::string &

filename

)

create an AutoPolygon and initialize it with an image file the image must be a 32bit PNG for current version 3.7

Parameters

filename

a path to image file, e.g., "scene1/monster.png".

Returns

an AutoPolygon object;

trace()

std::vector<Vec2> trace	(	const cocos2d::Rect &	rect,
		float	threshold = 0.0f
	)

trace all the points along the outline of the image,

Warning

must create AutoPolygon with filename to use this function

Parameters

rect	a texture rect for specify an area of the image
threshold	the value when alpha is greater than this value will be counted as opaque, default to 0.0

Returns

a vector of vec2 of all the points found in clockwise order

auto ap = AutoPolygon("grossini.png");
auto rect = Rect(100, 100, 200, 200);
std::vector<Vec2> points = ap.trace(rect);//default threshold is 0.0

reduce()

std::vector<Vec2> reduce	(	const std::vector< Vec2 > &	points,
		const Rect &	rect,
		float	epsilon = 2.0f
	)

reduce the amount of points so its faster for GPU to process and draw based on Ramer-Douglas-Peucker algorithm

Parameters

points	a vector of Vec2 points as input
rect	a texture rect for specify an area of the image to avoid over reduction
epsilon	the perpendicular distance where points smaller than this value will be discarded

Returns

a vector of Vec2 of the remaining points in clockwise order

auto ap = AutoPolygon();
std::vector<Vec2> reduced = ap.reduce(inputPoints, rect);//default epsilon is 2

expand()

std::vector<Vec2> expand	(	const std::vector< Vec2 > &	points,
		const Rect &	rect,
		float	epsilon
	)

expand the points along their edge, useful after you reduce the points that cuts into the sprite using ClipperLib

Parameters

points	a vector of Vec2 points as input
rect	a texture rect for specify an area of the image, the expanded points will be clamped in this rect, ultimately resulting in a quad if the expansion is too great
epsilon	the distance which the edges will expand

Returns

a vector of Vec2 as the result of the expansion

auto ap = AutoPolygon();
std::vector<Vec2> expanded = ap.expand(inputPoints, rect, 2.0);

triangulate()

TrianglesCommand::Triangles triangulate

(

const std::vector< Vec2 > &

points

)

Triangulate the input points into triangles for rendering using poly2tri.

Warning

points must be closed loop, cannot have 2 points sharing the same position and cannot intersect itself

Parameters

points

a vector of vec2 points as input

Returns

a Triangles object with points and indices

auto ap = AutoPolygon();
TrianglesCommand::Triangles myPolygons = ap.triangulate(myPoints);

calculateUV()

void calculateUV	(	const Rect &	rect,
		V3F_C4B_T2F *	verts,
		ssize_t	count
	)

calculate the UV coordinates for each points based on a texture rect

Warning

This method requires the AutoPolygon object to know the texture file dimension

Parameters

rect	a texture rect to specify where to map the UV
verts	a pointer to the verts array, served both as input and output verts
count	the count for the verts array auto ap = AutoPolygon("grossini.png"); TrianglesCommand::Triangles myPolygons = ap.triangulate(myPoints); ap.calculateUV(rect, myPolygons.verts, 20);

generateTriangles()

PolygonInfo generateTriangles	(	const Rect &	rect = Rect::ZERO,
		float	epsilon = 2.0f,
		float	threshold = 0.05f
	)

a helper function, packing trace, reduce, expand, triangulate and calculate uv in one function

Parameters

rect	texture rect, use Rect::ZERO for the size of the texture, default is Rect::ZERO
epsilon	the value used to reduce and expand, default to 2.0
threshold	the value where bigger than the threshold will be counted as opaque, used in trace

Returns

a PolygonInfo, to use with sprite

auto ap = AutoPolygon("grossini.png");
PolygonInfo myInfo = ap.generateTriangles();//use all default values
auto sp1 = Sprite::create(myInfo);
polygonInfo myInfo2 = ap.generateTriangles(Rect::ZERO, 5.0, 0.1);//ap can be reused to generate another set of PolygonInfo with different settings
auto sp2 = Sprite::create(myInfo2);

generatePolygon()

static PolygonInfo generatePolygon ( const std::string &  filename, const Rect &  rect = Rect::ZERO, float  epsilon = 2.0f, float  threshold = 0.05f  )

static

a helper function, packing autoPolygon creation, trace, reduce, expand, triangulate and calculate uv in one function

Warning

if you want to repetitively generate polygons, consider create an AutoPolygon object, and use generateTriangles function, as it only reads the file once

Parameters

filename	A path to image file, e.g., "scene1/monster.png".
rect	texture rect, use Rect::ZERO for the size of the texture, default is Rect::ZERO
epsilon	the value used to reduce and expand, default to 2.0
threshold	the value where bigger than the threshold will be counted as opaque, used in trace

Returns

a PolygonInfo, to use with sprite

auto sp = Sprite::create(AutoPolygon::generatePolygon("grossini.png"));

isScreenPointInRect()

bool cocos2d::isScreenPointInRect	(	const Vec2 &	pt,
		const Camera *	camera,
		const Mat4 &	w2l,
		const Rect &	rect,
		Vec3 *	p
	)

This is a helper function, checks a GL screen point is in content rectangle space.

The content rectangle defined by origin(0,0) and content size. This function convert GL screen point to near and far planes as points Pn and Pf, then calculate the intersect point P which the line PnPf intersect with content rectangle. If P in content rectangle means this node be hit.

Parameters

pt	The point in GL screen space.
camera	Which camera used to unproject pt to near/far planes.
w2l	World to local transform matrix, used to convert Pn and Pf to rectangle space.
rect	The test rectangle in local space. @parma p Point to a Vec3 for store the intersect point, if don't need them set to nullptr.

Returns

true if the point is in content rectangle, false otherwise.