Group

Group is a Grouping node that can contain most nodes.

Overview

Group
Hierarchy
Fields
Description
Example
Browser Compatibility
External Links

The Group node belongs to the Grouping component and its container field is children. It is available since X3D version 3.0 or later.

Hierarchy

+ X3DNode

+ X3DChildNode

+ X3DGroupingNode

+ Group

Fields

SFNode [in, out] metadata NULL [X3DMetadataObject]

Metadata are not part of the X3D world and not interpreted by the X3D browser, but they can be accessed via the ECMAScript interface.

SFVec3f [ ] bboxSize -1 -1 -1 [0,∞) or −1 −1 −1

Bounding box size is usually omitted, and can easily be calculated automatically by an X3D player at scene-loading time with minimal computational cost. Bounding box size can also be defined as an optional authoring hint that suggests an optimization or constraint.

Hint

Can be useful for collision computations or inverse-kinematics (IK) engines.

SFVec3f [ ] bboxCenter 0 0 0 (-∞,∞)

Bounding box center: optional hint for position offset from origin of local coordinate system.

MFNode [in] addChildren

Input field addChildren.

MFNode [in] removeChildren

Input field removeChildren.

MFNode [in, out] children [ ] [X3DChildNode]

Grouping nodes contain a list of children nodes.

Hint

Each grouping node defines a coordinate space for its children, relative to the coordinate space of its parent node. Thus transformations accumulate down the scene graph hierarchy.

Description

Hint

Insert a Shape node before adding geometry or Appearance.

Example

Group

Downlod ZIP file

XML Encoding

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<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.3//EN" "http://www.web3d.org/specifications/x3d-3.3.dtd">

<head>

</head>

<Scene>

<NavigationInfo

type='"EXAMINE"'

transitionType='"ANIMATE"'/>

<Background DEF='Gray'

skyColor='0.2 0.2 0.2'/>

<Viewpoint

description='Initial View'

position='88.6625 86.1609 76.3865'

orientation='-0.580909769224258 0.777411062318136 0.241196766572868 56.2121996657596'

centerOfRotation='7 7 -5'

fieldOfView='10.643'/>

<Transform

translation='1 1 1'>

</Appearance>

<IndexedFaceSet

colorIndex='0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 2, 2, 2, 2, -1, 2, 2, 2, 2, -1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1'

texCoordIndex='0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1'

coordIndex='0, 1, 2, 3, -1, 5, 4, 7, 6, -1, 3, 2, 6, 7, -1, 4, 5, 1, 0, -1, 4, 0, 3, 7, -1, 1, 5, 6, 2, -1'>

<Color

color='1 0 0, 1 0.647059 0, 0.117647 0.564706 1'/>

<TextureCoordinate

point='0 0, 1 0, 1 1, 0 1'/>

<Coordinate

point='-1 -1 1, 1 -1 1, 1 1 1, -1 1 1, -1 -1 -1, 1 -1 -1, 1 1 -1, -1 1 -1'/>

</IndexedFaceSet>

</Shape>

</Transform>

<Transform

translation='3 1 1'>

</Transform>

</Group>

<TimeSensor DEF='Timer'

cycleInterval='0.05'

loop='true'/>

</field>

</field>

<![CDATA[ecmascript:

var

dimension = 7,

offset = 1

size = 2,

position = [0, 0, 0],

cache = new MFNode ();

function initialize ()

{

cache .assign (group .children);

group .children .length = 0;

for (var i = 0; i < matrix .length; ++ i)

{

if (matrix [i])

matrix [i] = 1;

}

position [0] = 0;

position [1] = 0;

position [2] = 0;

createCube (position);

}

function set_time (value, time)

{

if (getNextPosition (position))

{

createCube (position);

}

else

{

initialize ();

}

function getNextPosition (position)

{

var index = getIndex (position [2], position [1], position [0]);

matrix [index] = 2;

for (var zOffset = -1; zOffset < 2; ++ zOffset)

{

var z = position [2] + zOffset;

if (z < 0 || z >= dimension)

continue;

for (var yOffset = -1; yOffset < 2; ++ yOffset)

{

var y = position [1] + yOffset;

if (y < 0 || y >= dimension)

continue;

for (var xOffset = -1; xOffset < 2; ++ xOffset)

{

if (Math .abs (xOffset) + Math .abs (yOffset) + Math .abs (zOffset) > 1)

continue;

var x = position [0] + xOffset;

if (x < 0 || x >= dimension)

continue;

var next = getIndex (z, y, x);

if (matrix [next] == 1)

{

//print (x, " ", y, " ", z, " ", next, " ", matrix [next]);

position [0] = x;

position [1] = y;

position [2] = z;

return true;

}

//print (false);

return false;

}

function createCube (position)

{

if (cache .length)

{

var transform = cache .pop ();

}

else

{

var transform = Browser .currentScene .createNode ("Transform");

transform .children .push (shape);

}

transform .translation .x = position [0] * size + offset;

transform .translation .y = position [1] * size + offset;

transform .translation .z = -position [2] * size + offset;

group .children .push (transform);

}

function getIndex (z, y, x)

{

return (z * dimension * dimension) + (dimension * y) + x;

}]]>

</Script>

</Scene>

</X3D>

Classic Encoding

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#X3D V3.3 utf8 Titania V4.3.0

PROFILE Full

UNIT angle degree 0.0174532925199432958

META "comment" "World of Titania"

META "created" "Wed, 22 Nov 2017 08:03:22 GMT"

META "creator" "Holger Seelig"

META "generator" "Titania V4.0.0, http://titania.create3000.de"

META "identifier" "file:///run/user/1000/gvfs/ftp:host=create3000.de/html/create3000.de/media/htdocs/components/Grouping/Group/Group.x3d"

META "modified" "Wed, 22 Nov 2017 08:03:22 GMT"

NavigationInfo {

type "EXAMINE"

transitionType "ANIMATE"

}

DEF Gray Background {

skyColor 0.2 0.2 0.2

}

Viewpoint {

description "Initial View"

position 88.6625 86.1609 76.3865

orientation -0.580909769224258 0.777411062318136 0.241196766572868 56.2121996657596

centerOfRotation 7 7 -5

fieldOfView 10.643

}

DEF Cubes Group {

children [

Transform {

translation 1 1 1

children DEF ColorCube Shape {

appearance Appearance {

material Material { }

}

geometry IndexedFaceSet {

colorIndex [ 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 2, 2, 2, 2, -1, 2, 2, 2, 2, -1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1 ]

texCoordIndex [ 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1 ]

coordIndex [ 0, 1, 2, 3, -1, 5, 4, 7, 6, -1, 3, 2, 6, 7, -1, 4, 5, 1, 0, -1, 4, 0, 3, 7, -1, 1, 5, 6, 2, -1 ]

color Color {

color [ 1 0 0, 1 0.647059 0, 0.117647 0.564706 1 ]

}

texCoord TextureCoordinate {

point [ 0 0, 1 0, 1 1, 0 1 ]

}

coord Coordinate {

point [ -1 -1 1, 1 -1 1, 1 1 1, -1 1 1, -1 -1 -1, 1 -1 -1, 1 1 -1, -1 1 -1 ]

}

Transform {

translation 3 1 1

children USE ColorCube

}

]

}

DEF Timer TimeSensor {

cycleInterval 0.05

loop TRUE

}

DEF CubesScript Script {

inputOnly SFTime set_time

initializeOnly MFInt32 matrix [ 2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1 ]

initializeOnly SFNode shape USE ColorCube

initializeOnly SFNode group USE Cubes

url "ecmascript:

var

dimension = 7,

offset = 1

size = 2,

position = [0, 0, 0],

cache = new MFNode ();

function initialize ()

{

cache .assign (group .children);

group .children .length = 0;

for (var i = 0; i < matrix .length; ++ i)

{

if (matrix [i])

matrix [i] = 1;

}

position [0] = 0;

position [1] = 0;

position [2] = 0;

createCube (position);

}

function set_time (value, time)

{

if (getNextPosition (position))

{

createCube (position);

}

else

{

initialize ();

}

function getNextPosition (position)

{

var index = getIndex (position [2], position [1], position [0]);

matrix [index] = 2;

for (var zOffset = -1; zOffset < 2; ++ zOffset)

{

var z = position [2] + zOffset;

if (z < 0 || z >= dimension)

continue;

for (var yOffset = -1; yOffset < 2; ++ yOffset)

{

var y = position [1] + yOffset;

if (y < 0 || y >= dimension)

continue;

for (var xOffset = -1; xOffset < 2; ++ xOffset)

{

if (Math .abs (xOffset) + Math .abs (yOffset) + Math .abs (zOffset) > 1)

continue;

var x = position [0] + xOffset;

if (x < 0 || x >= dimension)

continue;

var next = getIndex (z, y, x);

if (matrix [next] == 1)

{

//print (x, \" \", y, \" \", z, \" \", next, \" \", matrix [next]);

position [0] = x;

position [1] = y;

position [2] = z;

return true;

}

//print (false);

return false;

}

function createCube (position)

{

if (cache .length)

{

var transform = cache .pop ();

}

else

{

var transform = Browser .currentScene .createNode (\"Transform\");

transform .children .push (shape);

}

transform .translation .x = position [0] * size + offset;

transform .translation .y = position [1] * size + offset;

transform .translation .z = -position [2] * size + offset;

group .children .push (transform);

}

function getIndex (z, y, x)

{

return (z * dimension * dimension) + (dimension * y) + x;

}

ROUTE Timer.cycleTime TO CubesScript.set_time

JSON Encoding

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{ "X3D": {

"encoding": "UTF-8",

"@profile": "Full",

"@version": "3.3",

"@xsd:noNamespaceSchemaLocation": "http://www.web3d.org/specifications/x3d-3.3.xsd",

"JSON schema": "http://www.web3d.org/specifications/x3d-3.3-JSONSchema.json",

"head": {

"meta": [

{

"@name": "comment",

"@content": "World of Titania"

{

"@name": "created",

"@content": "Wed, 22 Nov 2017 08:03:22 GMT"

{

"@name": "creator",

"@content": "Holger Seelig"

{

"@name": "generator",

"@content": "Titania V4.0.0, http://titania.create3000.de"

{

"@name": "identifier",

"@content": "file:///run/user/1000/gvfs/ftp:host=create3000.de/html/create3000.de/media/htdocs/components/Grouping/Group/Group.x3d"

{

"@name": "modified",

"@content": "Wed, 22 Nov 2017 08:03:22 GMT"

}

"unit": [

{

"@category": "angle",

"@name": "degree",

"@conversionFactor": 0.0174532925199432958

]

"Scene": {

"-children": [

{ "NavigationInfo":

{

"@type": [ "EXAMINE" ],

"@transitionType": [ "ANIMATE" ]

}

{ "Background":

{

"@DEF": "Gray",

"@skyColor": [ 0.2, 0.2, 0.2 ]

}

{ "Viewpoint":

{

"@description": "Initial View",

"@position": [ 88.6625, 86.1609, 76.3865 ],

"@orientation": [ -0.580909769224258, 0.777411062318136, 0.241196766572868, 56.2121996657596 ],

"@centerOfRotation": [ 7, 7, -5 ],

"@fieldOfView": 10.643

}

{ "Group":

{

"@DEF": "Cubes",

"-children": [

{ "Transform":

{

"@translation": [ 1, 1, 1 ],

"-children": [

{ "Shape":

{

"@DEF": "ColorCube",

"-appearance": { "Appearance":

{

"-material": { "Material":

{

}

"-geometry": { "IndexedFaceSet":

{

"@colorIndex": [ 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 2, 2, 2, 2, -1, 2, 2, 2, 2, -1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1 ],

"@texCoordIndex": [ 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1, 0, 1, 2, 3, -1 ],

"@coordIndex": [ 0, 1, 2, 3, -1, 5, 4, 7, 6, -1, 3, 2, 6, 7, -1, 4, 5, 1, 0, -1, 4, 0, 3, 7, -1, 1, 5, 6, 2, -1 ],

"-color": { "Color":

{

"@color": [ 1, 0, 0, 1, 0.647059, 0, 0.117647, 0.564706, 1 ]

}

"-texCoord": { "TextureCoordinate":

{

"@point": [ 0, 0, 1, 0, 1, 1, 0, 1 ]

}

"-coord": { "Coordinate":

{

"@point": [ -1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1 ]

}

]

}

{ "Transform":

{

"@translation": [ 3, 1, 1 ],

"-children": [

{ "Shape":

{

"@USE": "ColorCube"

}

]

}

]

}

{ "TimeSensor":

{

"@DEF": "Timer",

"@cycleInterval": 0.05,

"@loop": true

}

{ "Script":

{

"@DEF": "CubesScript",

"field": [

{

"@accessType": "inputOnly",

"@type": "SFTime",

"@name": "set_time"

{

"@accessType": "initializeOnly",

"@type": "MFInt32",

"@name": "matrix",

"@value": [ 2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1 ]

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "shape",

"-children": [

{ "Shape":

{

"@USE": "ColorCube"

}

]

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "group",

"-children": [

{ "Group":

{

"@USE": "Cubes"

}

]

}

"#sourceText": [

"ecmascript:",

"",

"var",

"\tdimension = 7,",

"\toffset = 1",

"\tsize = 2,",

"\tposition = [0, 0, 0],",

"\tcache = new MFNode ();",

"",

"function initialize ()",

"{",

"\tcache .assign (group .children);",

"\tgroup .children .length = 0;",

"",

"\tfor (var i = 0; i < matrix .length; ++ i)",

"\t{",

"\t\tif (matrix [i])",

"\t\t\tmatrix [i] = 1;",

"\t}",

"",

"\tposition [0] = 0;",

"\tposition [1] = 0;",

"\tposition [2] = 0;",

"",

"\tcreateCube (position);",

"}",

"",

"function set_time (value, time)",

"{",

"\tif (getNextPosition (position))",

"\t{",

"\t\tcreateCube (position);",

"\t}",

"\telse",

"\t{",

"\t\tinitialize ();",

"\t}",

"}",

"",

"function getNextPosition (position)",

"{",

"\tvar index = getIndex (position [2], position [1], position [0]);",

"",

"\tmatrix [index] = 2;",

"\t",

"\tfor (var zOffset = -1; zOffset < 2; ++ zOffset)",

"\t{",

"\t\tvar z = position [2] + zOffset;",

"\t",

"\t\tif (z < 0 || z >= dimension)",

"\t\t\tcontinue;",

"",

"\t\tfor (var yOffset = -1; yOffset < 2; ++ yOffset)",

"\t\t{",

"\t\t\tvar y = position [1] + yOffset;",

"",

"\t\t\tif (y < 0 || y >= dimension)",

"\t\t\t\tcontinue;",

"",

"\t\t\tfor (var xOffset = -1; xOffset < 2; ++ xOffset)",

"\t\t\t{",

"\t\t\t\tif (Math .abs (xOffset) + Math .abs (yOffset) + Math .abs (zOffset) > 1)",

"\t\t\t\t\tcontinue;",

"\t\t\t\t",

"\t\t\t\tvar x = position [0] + xOffset;",

"\t\t\t\t",

"\t\t\t\tif (x < 0 || x >= dimension)",

"\t\t\t\t\tcontinue;",

"\t\t\t\t",

"\t\t\t\tvar next = getIndex (z, y, x);",

"\t\t\t\t",

"\t\t\t\tif (matrix [next] == 1)",

"\t\t\t\t{",

"\t\t\t\t\t//print (x, \" \", y, \" \", z, \" \", next, \" \", matrix [next]);",

"",

"\t\t\t\t\tposition [0] = x;",

"\t\t\t\t\tposition [1] = y;",

"\t\t\t\t\tposition [2] = z;",

"",

"\t\t\t\t\treturn true;",

"\t\t\t\t}",

"\t\t\t}",

"\t\t}",

"\t}",

"",

"\t//print (false);",

"",

"\treturn false;",

"}",

"",

"function createCube (position)",

"{",

"\tif (cache .length)",

"\t{",

"\t\tvar transform = cache .pop ();",

"\t}",

"\telse",

"\t{\t",

"\t\tvar transform = Browser .currentScene .createNode (\"Transform\");",

"",

"\t\ttransform .children .push (shape);",

"\t}",

"",

"\ttransform .translation .x = position [0] * size + offset;",

"\ttransform .translation .y = position [1] * size + offset;",

"\ttransform .translation .z = -position [2] * size + offset;",

"\t",

"\tgroup .children .push (transform);",

"}",

"",

"function getIndex (z, y, x)",

"{",

"\treturn (z * dimension * dimension) + (dimension * y) + x;",

"}"

]

}

{ "ROUTE":

{

"@fromNode": "Timer",

"@fromField": "cycleTime",

"@toNode": "CubesScript",

"@toField": "set_time"

}

]

}

Browser Compatibility

Titania	X_ITE
yes	yes

External Links

X3D Specification

Titania X3D Editor

Bring Colours to Your Life.

Titania v4.3.1

Bring Colours to Your Life.

X3D Reference

Group

Group

Hierarchy

Fields

SFNode [in, out] metadata NULL [X3DMetadataObject]

SFVec3f [ ] bboxSize -1 -1 -1 [0,∞) or −1 −1 −1

Hint

SFVec3f [ ] bboxCenter 0 0 0 (-∞,∞)

MFNode [in] addChildren

MFNode [in] removeChildren

MFNode [in, out] children [ ] [X3DChildNode]

Hint

Description

Hint

Example

XML Encoding

Classic Encoding

JSON Encoding

Browser Compatibility

External Links