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.
The IndexedLineSet node belongs to the Rendering component and its container field is geometry. It is available since X3D version 3.0 or later.
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).
See Also
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
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"> <X3D profile='Full' version='3.3' xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='http://www.web3d.org/specifications/x3d-3.3.xsd'> <head> <meta name='comment' content='World of Titania'/> <meta name='created' content='Tue, 03 Jul 2018 02:20:51 GMT'/> <meta name='creator' content='Holger Seelig'/> <meta name='generator' content='Titania V4.3.1, http://titania.create3000.de'/> <meta name='identifier' content='file:///home/holger/Projekte/Server/create3000.de/media/htdocs/components/Rendering/IndexedLineSet/IndexedLineSet.O.x3d'/> <meta name='modified' content='Wed, 04 Jul 2018 03:25:11 GMT'/> </head> <Scene> <ProtoDeclare name='Cloth'> <ProtoInterface> <field accessType='inputOutput' type='SFFloat' name='width' value='1'/> <field accessType='inputOutput' type='SFFloat' name='height' value='1'/> <field accessType='inputOutput' type='SFInt32' name='xDimension' value='10'/> <field accessType='inputOutput' type='SFInt32' name='yDimension' value='10'/> </ProtoInterface> <ProtoBody> <Group> <Shape> <IndexedLineSet DEF='_1'> <Color/> <Coordinate DEF='_2'/> </IndexedLineSet> </Shape> <Shape> <Appearance> <Material transparency='1'/> </Appearance> <IndexedTriangleSet DEF='_3' normalPerVertex='false'> <Coordinate USE='_2'/> </IndexedTriangleSet> </Shape> <PlaneSensor DEF='_4' description='Click and drag cloth.'/> </Group> <TimeSensor DEF='_5' cycleInterval='0.033333333' loop='true'/> <Script DEF='ClothScript'> <field accessType='inputOnly' type='SFBool' name='set_active'/> <field accessType='inputOnly' type='SFVec3f' name='set_trackPoint'/> <field accessType='inputOnly' type='SFTime' name='set_time'/> <field accessType='inputOutput' type='SFFloat' name='width'/> <field accessType='inputOutput' type='SFFloat' name='height'/> <field accessType='inputOutput' type='SFInt32' name='xDimension'/> <field accessType='inputOutput' type='SFInt32' name='yDimension'/> <field accessType='initializeOnly' type='SFVec2f' name='spacing'/> <field accessType='initializeOnly' type='SFNode' name='lines'> <IndexedLineSet USE='_1'/> </field> <field accessType='initializeOnly' type='SFNode' name='faces'> <IndexedTriangleSet USE='_3'/> </field> <field accessType='initializeOnly' type='SFNode' name='coord'> <Coordinate USE='_2'/> </field> <field accessType='initializeOnly' type='SFNode' name='touch'> <PlaneSensor USE='_4'/> </field> <IS> <connect nodeField='width' protoField='width'/> <connect nodeField='height' protoField='height'/> <connect nodeField='xDimension' protoField='xDimension'/> <connect nodeField='yDimension' protoField='yDimension'/> </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> <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'/> </ProtoBody> </ProtoDeclare> <WorldInfo/> <NavigationInfo type='"NONE"'/> <Viewpoint description='Initial View' position='0.864865 0.304953 1.70369' centerOfRotation='0.864865 0.304953 0'/> <Transform DEF='Cloth'> <ProtoInstance name='Cloth'> <fieldValue name='width' value='1.77778'/> <fieldValue name='xDimension' value='37'/> <fieldValue name='yDimension' value='21'/> </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 } ] } } ] } } ] } } } |
Titania
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