IndexedLineSet

IndexedLineSet is a geometry node that can contain a Coordinate|CoordinateDouble node and an (optional) Color|ColorRGBA node. Color values or a sibling Material emissiveColor is used to draw lines and points. Lines are not lit, are not texture-mapped, and do not participate in collision detection.

Overview

IndexedLineSet
Hierarchy
Fields
Description
Example
Browser Compatibility
External Links

The IndexedLineSet node belongs to the Rendering component and its container field is geometry. It is available since X3D version 3.0 or later.

Hierarchy

+ X3DNode

+ X3DGeometryNode

+ IndexedLineSet

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.

MFInt32 [in] set_coordIndex [0,∞) or -1

CoordIndex indices provide the order in which coordinates are applied to construct each polyline. Order starts at index 0, commas are optional between sets.

Hint

Sentinel value -1 is used to separate indices for each successive polyline.

SFBool [ ] colorPerVertex TRUE

Whether Color node color values are applied to each vertex (true) or per polyline (false).

MFInt32 [in, out] colorIndex [ ] [0,∞) or -1

ColorIndex indices provide order in which colors are applied.

Hints

If colorPerVertex='false' then one index is provided for each polygon defined by the coordIndex array. No sentinel -1 values are included. If colorPerVertex='true' then a matching set of indices is provided, each separated by sentinel -1, that exactly corresponds to individual values in the coordIndex array polygon definitions. If rendering Coordinate points originally defined for an IndexedFaceSet, index values may need to repeat initial each initial vertex to close the polygons.

MFInt32 [in, out] coordIndex [ ] [0,∞) or -1

CoordIndex indices provide the order in which coordinates are applied to construct each polygon face. Order starts at index 0, commas are optional between sets, use -1 to separate indices for each polyline.

Hint

If rendering Coordinate points originally defined for an IndexedFaceSet, index values may need to repeat initial each initial vertex to close the polygons.

MFNode [in, out] attrib [ ] [X3DVertexAttributeNode]

Input/Output field attrib.

SFNode [in, out] fogCoord NULL [FogCoordinate]

Input/Output field fogCoord.

SFNode [in, out] color NULL [X3DColorNode]

Input/Output field color.

SFNode [in, out] coord NULL [X3DCoordinateNode]

Input/Output field coord.

Description

Hints

Use a different color (or emissiveColor) than the background color.
If rendering Coordinate points originally defined for an IndexedFaceSet, index values may need to repeat each initial vertex to close each polygon outline. Step-wise colors or linear interpolation of colors can be used as a good scientific visualization technique to map arbitrary function values to a color map.
Insert a Shape node before adding geometry or Appearance.
You can also substitute a type-matched ProtoInstance node for contained content.
Consider including Fog to provide further depth cueing for IndexedLineSet (ILS).

Example

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>

</ProtoInterface>

<Group>

<Shape>

</IndexedLineSet>

</Shape>

<Shape>

<Material

transparency='1'/>

</Appearance>

<IndexedTriangleSet DEF='_3'

normalPerVertex='false'>

</IndexedTriangleSet>

</Shape>

<PlaneSensor DEF='_4'

description='Click and drag cloth.'/>

</Group>

<TimeSensor DEF='_5'

cycleInterval='0.033333333'

loop='true'/>

</field>

</field>

</field>

</field>

<IS>

</IS>

<![CDATA[ecmascript:

var

cloth = 0,

trackPoint = null;

function initialize ()

{

build ();

}

function set_active (value, time)

{

if (value)

{

trackPoint = cloth .getClosestPoint (touch .trackPoint_changed);

trackPoint .inv_mass = 0;

}

else

{

trackPoint .inv_mass = 1;

}

function set_trackPoint (value, time)

{

if (! touch .isActive)

return;

trackPoint .setCurrent (value);

}

function set_time (value, time)

{

var

point = coord .point;

cloth .update ();

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

var p = cloth .points [y] [x];

point [getIndex (x, y)] = p .current;

}

function set_width (value, time)

{

build ();

}

function set_height (value, time)

{

build ();

}

function set_xDimension (value, time)

{

build ();

}

function set_yDimension (value, time)

{

build ();

}

function build ()

{

spacing .x = width / (xDimension - 1);

spacing .y = height / (yDimension - 1);

if (spacing .x == 0 || spacing .y == 0)

return;

var

linesIndex = new MFInt32 (),

facesIndex = new MFInt32 (),

h = Math .random (),

s = Math .random (),

color1 = new SFColor (),

color2 = new SFColor (),

color = lines .color .color,

point = coord .point;

color1 .setHSV (h, s, Math .random () * 0.25);

color2 .setHSV (h, s, Math .random () * 0.25 + 0.75);

point .length = 0;

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

color .push (color1 .lerp (color2, y / yDimension));

point .push (new SFVec3f (x * spacing .x, y * spacing .y, 0));

}

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

var

x1 = x,

y1 = y,

x2 = x + 1,

y2 = y + 1;

if (x2 >= xDimension && y2 >= yDimension)

{

continue;

}

else if (x2 >= xDimension)

{

linesIndex .push (getIndex (x1, y2),

getIndex (x1, y1),

-1);

}

else if (y2 >= yDimension)

{

linesIndex .push (getIndex (x1, y1),

getIndex (x2, y1),

-1);

}

else

{

linesIndex .push (getIndex (x1, y2),

getIndex (x1, y1),

getIndex (x2, y1),

-1);

facesIndex .push (getIndex (x1, y1),

getIndex (x2, y1),

getIndex (x1, y2),

getIndex (x2, y1),

getIndex (x2, y2),

getIndex (x1, y2));

}

lines .set_coordIndex = linesIndex;

faces .index = facesIndex;

cloth = new Cloth (width, height, xDimension, yDimension);

}

function getIndex (x, y)

{

return y * xDimension + x;

}

////////////////////////////////////////////////////////////////////////////////////////////////////

var Point = function (x, y, z)

{

this .current = this .previous = new SFVec3f (x, y, z);

this .mass = this .inv_mass = 1;

this .force = new SFVec3f (0.0, -0.5, 0) .multiply (0.05 * 0.05);

this .radius = 3;

};

Point.prototype = {

setCurrent: function (p)

{

this .current = p;

setPrevious: function (p)

{

this .previous = p;

getCurrent: function ()

{

return this .current;

getPrevious: function ()

{

return this .previous;

move: function ()

{

if (this .inv_mass === 0)

return;

var new_pos = this .current .multiply (1.99) .subtract (this .previous .multiply (0.99)) .add (this.force);

this .previous = this .current;

this .current = new_pos;

};

var Constraint = function (p1, p2, rl)

{

this .p1 = p1;

this .p2 = p2;

this .rest_length = rl || p1 .getCurrent () .subtract (p2 .getCurrent()) .length ();

this .squared_rest_length = this .rest_length * this .rest_length;

};

Constraint.prototype = {

satisfy: function ()

{

var p1 = this .p1 .getCurrent ();

var p2 = this .p2 .getCurrent ();

var delta = p2 .subtract (p1);

var p1_im = this .p1.inv_mass;

var p2_im = this .p2.inv_mass;

var d = delta .dot (delta);

var diff = (d - this .squared_rest_length) / ((this .squared_rest_length + d) * (p1_im + p2_im));

if (p1_im !== 0)

{

this .p1 .setCurrent (p1 .add (delta .multiply (p1_im * diff)));

}

if (p2_im !== 0)

{

this .p2 .setCurrent (p2 .subtract (delta .multiply (p2_im * diff)));

}

};

var Cloth = function(width, height, xDimension, yDimension){

var

spacing = new SFVec2f (width / xDimension, height / yDimension),

max_dim = Math .max (width, height),

min_dim = Math .min (width, height);

this .num_iterations = 2;

this .points = [ ];

this .constraints = [ ];

this .xDimension = xDimension;

this .yDimension = yDimension;

var constraint;

for (var i = 0, y = 0; i < yDimension; ++ i, y += spacing .y)

{

this .points [i] = [ ];

for (var j = 0, x = 0; j < xDimension; ++ j, x += spacing .x)

{

this .points [i] [j] = new Point (x, y, 0);

//add a vertical constraint

if (i > 0)

{

this .constraints .push (new Constraint (this .points [i - 1] [j], this .points [i] [j]));

}

//add a new horizontal constraints

if (j > 0)

{

this .constraints .push (new Constraint (this .points [i] [j - 1], this .points [i] [j]));

}

//pin the top right and top left.

this .points [yDimension - 1] [0] .inv_mass = 0;

this .points [yDimension - 1] [Math .floor (xDimension / 2)] .inv_mass = 0;

this .points [yDimension - 1] [xDimension - 1] .inv_mass = 0;

this .num_constraints = this .constraints .length;

};

Cloth.prototype = {

update: function ()

{

var

num_x = this .xDimension,

num_y = this .yDimension,

num_c = this .num_constraints,

num_i = this .num_iterations;

//move each point with a pull from gravity

for (var i = 0; i < num_y; ++ i)

{

for (var j = 0; j < num_x; ++ j)

this .points [i] [j] .move ();

}

//make sure all the constraints are satisfied.

for (var j = 0; j < num_i; ++ j)

{

for (var i = 0; i < num_c; ++ i)

this .constraints [i] .satisfy ();

}

getClosestPoint: function (pos)

{

var

min_dist = 1,

min_point = null,

num_x = this.xDimension,

num_y = this.yDimension;

for (var y = 0; y < num_y; ++ y)

{

for (var x = 0; x < num_x; ++ x)

{

var dist = pos .subtract (this .points [y] [x] .getCurrent ()) .length();

if (dist < min_dist)

{

min_dist = dist;

min_point = this .points [y] [x];

}

return min_point;

};

]]>

</Script>

</ProtoBody>

</ProtoDeclare>

<NavigationInfo

type='"NONE"'/>

<Viewpoint

description='Initial View'

position='0.864865 0.304953 1.70369'

centerOfRotation='0.864865 0.304953 0'/>

</ProtoInstance>

</Transform>

</Scene>

</X3D>

Classic Encoding

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#X3D V3.3 utf8 Titania V4.3.1

PROFILE Full

META "comment" "World of Titania"

META "created" "Tue, 03 Jul 2018 02:20:51 GMT"

META "creator" "Holger Seelig"

META "generator" "Titania V4.3.1, http://titania.create3000.de"

META "identifier" "file:///home/holger/Projekte/Server/create3000.de/media/htdocs/components/Rendering/IndexedLineSet/IndexedLineSet.O.x3d"

META "modified" "Wed, 04 Jul 2018 03:25:11 GMT"

PROTO Cloth [

inputOutput SFFloat width 1

inputOutput SFFloat height 1

inputOutput SFInt32 xDimension 10

inputOutput SFInt32 yDimension 10

]

{

Group {

children [

Shape {

geometry DEF _1 IndexedLineSet {

color Color { }

coord DEF _2 Coordinate { }

}

Shape {

appearance Appearance {

material Material {

transparency 1

}

geometry DEF _3 IndexedTriangleSet {

normalPerVertex FALSE

coord USE _2

}

DEF _4 PlaneSensor {

description "Click and drag cloth."

}

]

}

DEF _5 TimeSensor {

cycleInterval 0.033333333

loop TRUE

}

DEF ClothScript Script {

inputOnly SFBool set_active

inputOnly SFVec3f set_trackPoint

inputOnly SFTime set_time

inputOutput SFFloat width IS width

inputOutput SFFloat height IS height

inputOutput SFInt32 xDimension IS xDimension

inputOutput SFInt32 yDimension IS yDimension

initializeOnly SFVec2f spacing 0 0

initializeOnly SFNode lines USE _1

initializeOnly SFNode faces USE _3

initializeOnly SFNode coord USE _2

initializeOnly SFNode touch USE _4

url "ecmascript:

var

cloth = 0,

trackPoint = null;

function initialize ()

{

build ();

}

function set_active (value, time)

{

if (value)

{

trackPoint = cloth .getClosestPoint (touch .trackPoint_changed);

trackPoint .inv_mass = 0;

}

else

{

trackPoint .inv_mass = 1;

}

function set_trackPoint (value, time)

{

if (! touch .isActive)

return;

trackPoint .setCurrent (value);

}

function set_time (value, time)

{

var

point = coord .point;

cloth .update ();

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

var p = cloth .points [y] [x];

point [getIndex (x, y)] = p .current;

}

function set_width (value, time)

{

build ();

}

function set_height (value, time)

{

build ();

}

function set_xDimension (value, time)

{

build ();

}

function set_yDimension (value, time)

{

build ();

}

function build ()

{

spacing .x = width / (xDimension - 1);

spacing .y = height / (yDimension - 1);

if (spacing .x == 0 || spacing .y == 0)

return;

var

linesIndex = new MFInt32 (),

facesIndex = new MFInt32 (),

h = Math .random (),

s = Math .random (),

color1 = new SFColor (),

color2 = new SFColor (),

color = lines .color .color,

point = coord .point;

color1 .setHSV (h, s, Math .random () * 0.25);

color2 .setHSV (h, s, Math .random () * 0.25 + 0.75);

point .length = 0;

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

color .push (color1 .lerp (color2, y / yDimension));

point .push (new SFVec3f (x * spacing .x, y * spacing .y, 0));

}

for (var y = 0; y < yDimension; ++ y)

{

for (var x = 0; x < xDimension; ++ x)

{

var

x1 = x,

y1 = y,

x2 = x + 1,

y2 = y + 1;

if (x2 >= xDimension && y2 >= yDimension)

{

continue;

}

else if (x2 >= xDimension)

{

linesIndex .push (getIndex (x1, y2),

getIndex (x1, y1),

-1);

}

else if (y2 >= yDimension)

{

linesIndex .push (getIndex (x1, y1),

getIndex (x2, y1),

-1);

}

else

{

linesIndex .push (getIndex (x1, y2),

getIndex (x1, y1),

getIndex (x2, y1),

-1);

facesIndex .push (getIndex (x1, y1),

getIndex (x2, y1),

getIndex (x1, y2),

getIndex (x2, y1),

getIndex (x2, y2),

getIndex (x1, y2));

}

lines .set_coordIndex = linesIndex;

faces .index = facesIndex;

cloth = new Cloth (width, height, xDimension, yDimension);

}

function getIndex (x, y)

{

return y * xDimension + x;

}

////////////////////////////////////////////////////////////////////////////////////////////////////

var Point = function (x, y, z)

{

this .current = this .previous = new SFVec3f (x, y, z);

this .mass = this .inv_mass = 1;

this .force = new SFVec3f (0.0, -0.5, 0) .multiply (0.05 * 0.05);

this .radius = 3;

};

Point.prototype = {

setCurrent: function (p)

{

this .current = p;

setPrevious: function (p)

{

this .previous = p;

getCurrent: function ()

{

return this .current;

getPrevious: function ()

{

return this .previous;

move: function ()

{

if (this .inv_mass === 0)

return;

var new_pos = this .current .multiply (1.99) .subtract (this .previous .multiply (0.99)) .add (this.force);

this .previous = this .current;

this .current = new_pos;

};

var Constraint = function (p1, p2, rl)

{

this .p1 = p1;

this .p2 = p2;

this .rest_length = rl || p1 .getCurrent () .subtract (p2 .getCurrent()) .length ();

this .squared_rest_length = this .rest_length * this .rest_length;

};

Constraint.prototype = {

satisfy: function ()

{

var p1 = this .p1 .getCurrent ();

var p2 = this .p2 .getCurrent ();

var delta = p2 .subtract (p1);

var p1_im = this .p1.inv_mass;

var p2_im = this .p2.inv_mass;

var d = delta .dot (delta);

var diff = (d - this .squared_rest_length) / ((this .squared_rest_length + d) * (p1_im + p2_im));

if (p1_im !== 0)

{

this .p1 .setCurrent (p1 .add (delta .multiply (p1_im * diff)));

}

if (p2_im !== 0)

{

this .p2 .setCurrent (p2 .subtract (delta .multiply (p2_im * diff)));

}

};

var Cloth = function(width, height, xDimension, yDimension){

var

spacing = new SFVec2f (width / xDimension, height / yDimension),

max_dim = Math .max (width, height),

min_dim = Math .min (width, height);

this .num_iterations = 2;

this .points = [ ];

this .constraints = [ ];

this .xDimension = xDimension;

this .yDimension = yDimension;

var constraint;

for (var i = 0, y = 0; i < yDimension; ++ i, y += spacing .y)

{

this .points [i] = [ ];

for (var j = 0, x = 0; j < xDimension; ++ j, x += spacing .x)

{

this .points [i] [j] = new Point (x, y, 0);

//add a vertical constraint

if (i > 0)

{

this .constraints .push (new Constraint (this .points [i - 1] [j], this .points [i] [j]));

}

//add a new horizontal constraints

if (j > 0)

{

this .constraints .push (new Constraint (this .points [i] [j - 1], this .points [i] [j]));

}

//pin the top right and top left.

this .points [yDimension - 1] [0] .inv_mass = 0;

this .points [yDimension - 1] [Math .floor (xDimension / 2)] .inv_mass = 0;

this .points [yDimension - 1] [xDimension - 1] .inv_mass = 0;

this .num_constraints = this .constraints .length;

};

Cloth.prototype = {

update: function ()

{

var

num_x = this .xDimension,

num_y = this .yDimension,

num_c = this .num_constraints,

num_i = this .num_iterations;

//move each point with a pull from gravity

for (var i = 0; i < num_y; ++ i)

{

for (var j = 0; j < num_x; ++ j)

this .points [i] [j] .move ();

}

//make sure all the constraints are satisfied.

for (var j = 0; j < num_i; ++ j)

{

for (var i = 0; i < num_c; ++ i)

this .constraints [i] .satisfy ();

}

getClosestPoint: function (pos)

{

var

min_dist = 1,

min_point = null,

num_x = this.xDimension,

num_y = this.yDimension;

for (var y = 0; y < num_y; ++ y)

{

for (var x = 0; x < num_x; ++ x)

{

var dist = pos .subtract (this .points [y] [x] .getCurrent ()) .length();

if (dist < min_dist)

{

min_dist = dist;

min_point = this .points [y] [x];

}

return min_point;

};

}

ROUTE _5.cycleTime TO ClothScript.set_time

ROUTE _4.isActive TO ClothScript.set_active

ROUTE _4.trackPoint_changed TO ClothScript.set_trackPoint

}

WorldInfo {

}

NavigationInfo {

type "NONE"

}

Viewpoint {

description "Initial View"

position 0.864865 0.304953 1.70369

centerOfRotation 0.864865 0.304953 0

}

DEF Cloth Transform {

children Cloth {

width 1.77778

xDimension 37

yDimension 21

}

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": "Tue, 03 Jul 2018 02:20:51 GMT"

{

"@name": "creator",

"@content": "Holger Seelig"

{

"@name": "generator",

"@content": "Titania V4.3.1, http://titania.create3000.de"

{

"@name": "identifier",

"@content": "file:///home/holger/Projekte/Server/create3000.de/media/htdocs/components/Rendering/IndexedLineSet/IndexedLineSet.O.x3d"

{

"@name": "modified",

"@content": "Wed, 04 Jul 2018 03:25:11 GMT"

}

]

"Scene": {

"-children": [

{ "ProtoDeclare":

{

"@name":"Cloth",

"ProtoInterface": {

"field": [

{

"@accessType": "inputOutput",

"@type": "SFFloat",

"@name": "width",

"@value": 1

{

"@accessType": "inputOutput",

"@type": "SFFloat",

"@name": "height",

"@value": 1

{

"@accessType": "inputOutput",

"@type": "SFInt32",

"@name": "xDimension",

"@value": 10

{

"@accessType": "inputOutput",

"@type": "SFInt32",

"@name": "yDimension",

"@value": 10

}

]

"ProtoBody": {

"-children": [

{ "Group":

{

"-children": [

{ "Shape":

{

"-geometry": { "IndexedLineSet":

{

"@DEF": "_1",

"-color": { "Color":

{

}

"-coord": { "Coordinate":

{

"@DEF": "_2"

}

{ "Shape":

{

"-appearance": { "Appearance":

{

"-material": { "Material":

{

"@transparency": 1

}

"-geometry": { "IndexedTriangleSet":

{

"@DEF": "_3",

"@normalPerVertex": false,

"-coord": { "Coordinate":

{

"@USE": "_2"

}

{ "PlaneSensor":

{

"@DEF": "_4",

"@description": "Click and drag cloth."

}

]

}

{ "TimeSensor":

{

"@DEF": "_5",

"@cycleInterval": 0.033333333,

"@loop": true

}

{ "Script":

{

"@DEF": "ClothScript",

"field": [

{

"@accessType": "inputOnly",

"@type": "SFBool",

"@name": "set_active"

{

"@accessType": "inputOnly",

"@type": "SFVec3f",

"@name": "set_trackPoint"

{

"@accessType": "inputOnly",

"@type": "SFTime",

"@name": "set_time"

{

"@accessType": "inputOutput",

"@type": "SFFloat",

"@name": "width"

{

"@accessType": "inputOutput",

"@type": "SFFloat",

"@name": "height"

{

"@accessType": "inputOutput",

"@type": "SFInt32",

"@name": "xDimension"

{

"@accessType": "inputOutput",

"@type": "SFInt32",

"@name": "yDimension"

{

"@accessType": "initializeOnly",

"@type": "SFVec2f",

"@name": "spacing"

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "lines",

"-children": [

{ "IndexedLineSet":

{

"@USE": "_1"

}

]

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "faces",

"-children": [

{ "IndexedTriangleSet":

{

"@USE": "_3"

}

]

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "coord",

"-children": [

{ "Coordinate":

{

"@USE": "_2"

}

]

{

"@accessType": "initializeOnly",

"@type": "SFNode",

"@name": "touch",

"-children": [

{ "PlaneSensor":

{

"@USE": "_4"

}

]

}

"#sourceText": [

"ecmascript:",

"",

"var",

"\tcloth = 0,",

"\ttrackPoint = null;",

"",

"function initialize ()",

"{",

"\tbuild ();",

"}",

"",

"function set_active (value, time)",

"{",

"\tif (value)",

"\t{",

"\t\ttrackPoint = cloth .getClosestPoint (touch .trackPoint_changed);",

"\t\t",

"\t\ttrackPoint .inv_mass = 0;",

"\t}",

"\telse",

"\t{",

"\t\ttrackPoint .inv_mass = 1;",

"\t}",

"}",

"",

"function set_trackPoint (value, time)",

"{",

"\tif (! touch .isActive)",

"\t\treturn;",

"",

"\ttrackPoint .setCurrent (value);",

"}",

"",

"function set_time (value, time)",

"{",

"\tvar",

"\t\tpoint = coord .point;",

"",

"\tcloth .update ();",

"\t",

"\tfor (var y = 0; y < yDimension; ++ y)",

"\t{",

"\t\tfor (var x = 0; x < xDimension; ++ x)",

"\t\t{",

"\t\t\tvar p = cloth .points [y] [x];",

"",

"\t\t\tpoint [getIndex (x, y)] = p .current;",

"\t\t}",

"\t}",

"}",

"",

"function set_width (value, time)",

"{",

"\tbuild ();",

"}",

"",

"function set_height (value, time)",

"{",

"\tbuild ();",

"}",

"",

"function set_xDimension (value, time)",

"{",

"\tbuild ();",

"}",

"",

"function set_yDimension (value, time)",

"{",

"\tbuild ();",

"}",

"",

"function build ()",

"{",

"\tspacing .x = width / (xDimension - 1);",

"\tspacing .y = height / (yDimension - 1);",

"",

"\tif (spacing .x == 0 || spacing .y == 0)",

"\t\treturn;",

"",

"\tvar",

"\t\tlinesIndex = new MFInt32 (),",

"\t\tfacesIndex = new MFInt32 (),",

"\t\th = Math .random (),",

"\t\ts = Math .random (),",

"\t\tcolor1 = new SFColor (),",

"\t\tcolor2 = new SFColor (),",

"\t\tcolor = lines .color .color,",

"\t\tpoint = coord .point;",

"",

"\tcolor1 .setHSV (h, s, Math .random () * 0.25);",

"\tcolor2 .setHSV (h, s, Math .random () * 0.25 + 0.75);",

"",

"\tpoint .length = 0;",

"",

"\tfor (var y = 0; y < yDimension; ++ y)",

"\t{",

"\t\tfor (var x = 0; x < xDimension; ++ x)",

"\t\t{",

"\t\t\tcolor .push (color1 .lerp (color2, y / yDimension));",

"\t\t\tpoint .push (new SFVec3f (x * spacing .x, y * spacing .y, 0));",

"\t\t}",

"\t}",

"\t",

"\tfor (var y = 0; y < yDimension; ++ y)",

"\t{",

"\t\tfor (var x = 0; x < xDimension; ++ x)",

"\t\t{",

"\t\t\tvar",

"\t\t\t\tx1 = x,",

"\t\t\t\ty1 = y,",

"\t\t\t\tx2 = x + 1,",

"\t\t\t\ty2 = y + 1;",

"",

"\t\t\tif (x2 >= xDimension && y2 >= yDimension)",

"\t\t\t{",

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

"\t\t\t}",

"\t\t\telse if (x2 >= xDimension)",

"\t\t\t{",

"\t\t\t\tlinesIndex .push (getIndex (x1, y2),",

"\t\t\t\t\t getIndex (x1, y1),",

"\t\t\t\t\t -1);",

"\t\t\t}",

"\t\t\telse if (y2 >= yDimension)",

"\t\t\t{",

"\t\t\t\tlinesIndex .push (getIndex (x1, y1),",

"\t\t\t\t\t getIndex (x2, y1),",

"\t\t\t\t\t -1);",

"\t\t\t}",

"\t\t\telse",

"\t\t\t{",

"\t\t\t\tlinesIndex .push (getIndex (x1, y2),",

"\t\t\t\t\t getIndex (x1, y1),",

"\t\t\t\t\t getIndex (x2, y1),",

"\t\t\t\t\t -1);",

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

"\t\t\t\tfacesIndex .push (getIndex (x1, y1),",

"\t\t\t\t\t getIndex (x2, y1),",

"\t\t\t\t\t getIndex (x1, y2),",

"\t\t\t\t\t getIndex (x2, y1),",

"\t\t\t\t\t getIndex (x2, y2),",

"\t\t\t\t\t getIndex (x1, y2));",

"\t\t\t}",

"\t\t}",

"\t}",

"",

"\tlines .set_coordIndex = linesIndex;",

"\tfaces .index = facesIndex;",

"\t",

"\tcloth = new Cloth (width, height, xDimension, yDimension);",

"}",

"",

"function getIndex (x, y)",

"{",

"\treturn y * xDimension + x;",

"}",

"",

"////////////////////////////////////////////////////////////////////////////////////////////////////",

"",

"var Point = function (x, y, z)",

"{",

"\tthis .current = this .previous = new SFVec3f (x, y, z);",

"\tthis .mass = this .inv_mass = 1;",

"\tthis .force = new SFVec3f (0.0, -0.5, 0) .multiply (0.05 * 0.05);",

"\tthis .radius = 3;",

"};",

"",

"Point.prototype = {",

"\tsetCurrent: function (p)",

"\t{",

"\t\tthis .current = p;",

"\t},",

"\t",

"\tsetPrevious: function (p)",

"\t{",

"\t\tthis .previous = p;",

"\t},",

"\t",

"\tgetCurrent: function ()",

"\t{",

"\t\treturn this .current;",

"\t},",

"\t",

"\tgetPrevious: function ()",

"\t{",

"\t\treturn this .previous;",

"\t},",

"\t",

"\tmove: function ()",

"\t{",

"\t\tif (this .inv_mass === 0)",

"\t\t\treturn;",

"\t\t\t",

"\t\tvar new_pos = this .current .multiply (1.99) .subtract (this .previous .multiply (0.99)) .add (this.force);",

"\t\t",

"\t\tthis .previous = this .current;",

"\t\tthis .current = new_pos;",

"\t},",

"\t",

"};",

"",

"var Constraint = function (p1, p2, rl)",

"{",

"\tthis .p1 = p1;",

"\tthis .p2 = p2;",

"\tthis .rest_length = rl || p1 .getCurrent () .subtract (p2 .getCurrent()) .length ();",

"\tthis .squared_rest_length = this .rest_length * this .rest_length;",

"};",

"",

"Constraint.prototype = {\t",

"\tsatisfy: function ()",

"\t{",

"\t\tvar p1 = this .p1 .getCurrent ();",

"\t\tvar p2 = this .p2 .getCurrent ();",

"\t\tvar delta = p2 .subtract (p1);",

"\t\t",

"\t\tvar p1_im = this .p1.inv_mass;",

"\t\tvar p2_im = this .p2.inv_mass;",

"\t\t",

"\t\tvar d = delta .dot (delta);",

"\t\tvar diff = (d - this .squared_rest_length) / ((this .squared_rest_length + d) * (p1_im + p2_im));",

"\t\t",

"\t\tif (p1_im !== 0)",

"\t\t{",

"\t\t\tthis .p1 .setCurrent (p1 .add (delta .multiply (p1_im * diff)));",

"\t\t}",

"\t\t",

"\t\tif (p2_im !== 0)",

"\t\t{",

"\t\t\tthis .p2 .setCurrent (p2 .subtract (delta .multiply (p2_im * diff)));",

"\t\t}",

"\t}",

"};",

"",

"var Cloth = function(width, height, xDimension, yDimension){",

"\t",

"\tvar",

"\t\tspacing = new SFVec2f (width / xDimension, height / yDimension),",

"\t\tmax_dim = Math .max (width, height),",

"\t\tmin_dim = Math .min (width, height);",

"",

"\tthis .num_iterations = 2;",

"\tthis .points = [ ];",

"\tthis .constraints = [ ];",

"\t",

"\tthis .xDimension = xDimension;",

"\tthis .yDimension = yDimension;",

"",

"\tvar constraint;",

"\t",

"\tfor (var i = 0, y = 0; i < yDimension; ++ i, y += spacing .y)",

"\t{",

"\t\tthis .points [i] = [ ];",

"\t\t",

"\t\tfor (var j = 0, x = 0; j < xDimension; ++ j, x += spacing .x)",

"\t\t{",

"\t\t\tthis .points [i] [j] = new Point (x, y, 0);",

"\t\t\t",

"\t\t\t//add a vertical constraint",

"\t\t\tif (i > 0)",

"\t\t\t{",

"\t\t\t\tthis .constraints .push (new Constraint (this .points [i - 1] [j], this .points [i] [j]));",

"\t\t\t}",

"\t\t\t",

"\t\t\t//add a new horizontal constraints",

"\t\t\tif (j > 0)",

"\t\t\t{",

"\t\t\t\tthis .constraints .push (new Constraint (this .points [i] [j - 1], this .points [i] [j]));",

"\t\t\t}",

"\t\t}",

"\t}",

"",

"\t//pin the top right and top left.",

"\tthis .points [yDimension - 1] [0] .inv_mass = 0;",

"\tthis .points [yDimension - 1] [Math .floor (xDimension / 2)] .inv_mass = 0;",

"\tthis .points [yDimension - 1] [xDimension - 1] .inv_mass = 0;",

"",

"\tthis .num_constraints = this .constraints .length;",

"};",

"",

"Cloth.prototype = {",

"\tupdate: function ()",

"\t{",

"\t\tvar",

"\t\t\tnum_x = this .xDimension,",

"\t\t\tnum_y = this .yDimension,",

"\t\t\tnum_c = this .num_constraints,",

"\t\t\tnum_i = this .num_iterations;",

"\t\t\t",

"\t\t//move each point with a pull from gravity",

"\t\tfor (var i = 0; i < num_y; ++ i)",

"\t\t{",

"\t\t\tfor (var j = 0; j < num_x; ++ j)",

"\t\t\t\tthis .points [i] [j] .move ();",

"\t\t}",

"\t\t",

"\t\t//make sure all the constraints are satisfied.",

"\t\tfor (var j = 0; j < num_i; ++ j)",

"\t\t{",

"\t\t\tfor (var i = 0; i < num_c; ++ i)",

"\t\t\t\tthis .constraints [i] .satisfy ();",

"\t\t}",

"\t},",

"\t",

"\tgetClosestPoint: function (pos)",

"\t{",

"\t\tvar",

"\t\t\tmin_dist = 1,",

"\t\t\tmin_point = null,",

"\t\t\tnum_x = this.xDimension,",

"\t\t\tnum_y = this.yDimension;",

"\t\t",

"\t\tfor (var y = 0; y < num_y; ++ y)",

"\t\t{",

"\t\t\tfor (var x = 0; x < num_x; ++ x)",

"\t\t\t{",

"\t\t\t\tvar dist = pos .subtract (this .points [y] [x] .getCurrent ()) .length();",

"\t\t\t\t",

"\t\t\t\tif (dist < min_dist)",

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

"\t\t\t\t\tmin_dist = dist;",

"\t\t\t\t\tmin_point = this .points [y] [x];",

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

"\t\t\t}",

"\t\t}",

"",

"\t\treturn min_point;",

"\t},",

"};"

"IS": {

"connect": [

{

"@nodeField": "width",

"@protoField": "width"

{

"@nodeField": "height",

"@protoField": "height"

{

"@nodeField": "xDimension",

"@protoField": "xDimension"

{

"@nodeField": "yDimension",

"@protoField": "yDimension"

}

]

}

{ "ROUTE":

{

"@fromNode": "_5",

"@fromField": "cycleTime",

"@toNode": "ClothScript",

"@toField": "set_time"

}

{ "ROUTE":

{

"@fromNode": "_4",

"@fromField": "isActive",

"@toNode": "ClothScript",

"@toField": "set_active"

}

{ "ROUTE":

{

"@fromNode": "_4",

"@fromField": "trackPoint_changed",

"@toNode": "ClothScript",

"@toField": "set_trackPoint"

}

]

}

{ "WorldInfo":

{

}

{ "NavigationInfo":

{

"@type": [ "NONE" ]

}

{ "Viewpoint":

{

"@description": "Initial View",

"@position": [ 0.864865, 0.304953, 1.70369 ],

"@centerOfRotation": [ 0.864865, 0.304953, 0 ]

}

{ "Transform":

{

"@DEF": "Cloth",

"-children": [

{ "ProtoInstance":

{

"@name": "Cloth",

"fieldValue": [

{

"@name": "width",

"@value": 1.77778

{

"@name": "xDimension",

"@value": 37

{

"@name": "yDimension",

"@value": 21

}

]

}

]

}

]

}

Browser Compatibility

Titania	X_ITE
yes	yes

External Links

X3D Specification

Titania X3D Editor

Bring Colours to Your Life.

Titania v4.3.3

Bring Colours to Your Life.

X3D Reference

IndexedLineSet

IndexedLineSet

Hierarchy

Fields

SFNode [in, out] metadata NULL [X3DMetadataObject]

MFInt32 [in] set_coordIndex [0,∞) or -1

Hint

SFBool [ ] colorPerVertex TRUE

See Also

MFInt32 [in, out] colorIndex [ ] [0,∞) or -1

Hints

MFInt32 [in, out] coordIndex [ ] [0,∞) or -1

Hint

MFNode [in, out] attrib [ ] [X3DVertexAttributeNode]

SFNode [in, out] fogCoord NULL [FogCoordinate]

SFNode [in, out] color NULL [X3DColorNode]

SFNode [in, out] coord NULL [X3DCoordinateNode]

Description

Hints

Example

XML Encoding

Classic Encoding

JSON Encoding

Browser Compatibility

External Links