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- THREE.LDrawLoader = ( function () {
- var conditionalLineVertShader = /* glsl */`
- attribute vec3 control0;
- attribute vec3 control1;
- attribute vec3 direction;
- varying float discardFlag;
- #include <common>
- #include <color_pars_vertex>
- #include <fog_pars_vertex>
- #include <logdepthbuf_pars_vertex>
- #include <clipping_planes_pars_vertex>
- void main() {
- #include <color_vertex>
- vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
- gl_Position = projectionMatrix * mvPosition;
- // Transform the line segment ends and control points into camera clip space
- vec4 c0 = projectionMatrix * modelViewMatrix * vec4( control0, 1.0 );
- vec4 c1 = projectionMatrix * modelViewMatrix * vec4( control1, 1.0 );
- vec4 p0 = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
- vec4 p1 = projectionMatrix * modelViewMatrix * vec4( position + direction, 1.0 );
- c0.xy /= c0.w;
- c1.xy /= c1.w;
- p0.xy /= p0.w;
- p1.xy /= p1.w;
- // Get the direction of the segment and an orthogonal vector
- vec2 dir = p1.xy - p0.xy;
- vec2 norm = vec2( -dir.y, dir.x );
- // Get control point directions from the line
- vec2 c0dir = c0.xy - p1.xy;
- vec2 c1dir = c1.xy - p1.xy;
- // If the vectors to the controls points are pointed in different directions away
- // from the line segment then the line should not be drawn.
- float d0 = dot( normalize( norm ), normalize( c0dir ) );
- float d1 = dot( normalize( norm ), normalize( c1dir ) );
- discardFlag = float( sign( d0 ) != sign( d1 ) );
- #include <logdepthbuf_vertex>
- #include <clipping_planes_vertex>
- #include <fog_vertex>
- }
- `;
- var conditionalLineFragShader = /* glsl */`
- uniform vec3 diffuse;
- uniform float opacity;
- varying float discardFlag;
- #include <common>
- #include <color_pars_fragment>
- #include <fog_pars_fragment>
- #include <logdepthbuf_pars_fragment>
- #include <clipping_planes_pars_fragment>
- void main() {
- if ( discardFlag > 0.5 ) discard;
- #include <clipping_planes_fragment>
- vec3 outgoingLight = vec3( 0.0 );
- vec4 diffuseColor = vec4( diffuse, opacity );
- #include <logdepthbuf_fragment>
- #include <color_fragment>
- outgoingLight = diffuseColor.rgb; // simple shader
- gl_FragColor = vec4( outgoingLight, diffuseColor.a );
- #include <tonemapping_fragment>
- #include <encodings_fragment>
- #include <fog_fragment>
- #include <premultiplied_alpha_fragment>
- }
- `;
- var tempVec0 = new THREE.Vector3();
- var tempVec1 = new THREE.Vector3();
- function smoothNormals( triangles, lineSegments ) {
- function hashVertex( v ) {
- // NOTE: 1e2 is pretty coarse but was chosen because it allows edges
- // to be smoothed as expected (see minifig arms). The errors between edges
- // could be due to matrix multiplication.
- var x = ~ ~ ( v.x * 1e2 );
- var y = ~ ~ ( v.y * 1e2 );
- var z = ~ ~ ( v.z * 1e2 );
- return `${ x },${ y },${ z }`;
- }
- function hashEdge( v0, v1 ) {
- return `${ hashVertex( v0 ) }_${ hashVertex( v1 ) }`;
- }
- var hardEdges = new Set();
- var halfEdgeList = {};
- var fullHalfEdgeList = {};
- var normals = [];
- // Save the list of hard edges by hash
- for ( var i = 0, l = lineSegments.length; i < l; i ++ ) {
- var ls = lineSegments[ i ];
- var v0 = ls.v0;
- var v1 = ls.v1;
- hardEdges.add( hashEdge( v0, v1 ) );
- hardEdges.add( hashEdge( v1, v0 ) );
- }
- // track the half edges associated with each triangle
- for ( var i = 0, l = triangles.length; i < l; i ++ ) {
- var tri = triangles[ i ];
- for ( var i2 = 0, l2 = 3; i2 < l2; i2 ++ ) {
- var index = i2;
- var next = ( i2 + 1 ) % 3;
- var v0 = tri[ `v${ index }` ];
- var v1 = tri[ `v${ next }` ];
- var hash = hashEdge( v0, v1 );
- // don't add the triangle if the edge is supposed to be hard
- if ( hardEdges.has( hash ) ) continue;
- halfEdgeList[ hash ] = tri;
- fullHalfEdgeList[ hash ] = tri;
- }
- }
- // NOTE: Some of the normals wind up being skewed in an unexpected way because
- // quads provide more "influence" to some vertex normals than a triangle due to
- // the fact that a quad is made up of two triangles and all triangles are weighted
- // equally. To fix this quads could be tracked separately so their vertex normals
- // are weighted appropriately or we could try only adding a normal direction
- // once per normal.
- // Iterate until we've tried to connect all triangles to share normals
- while ( true ) {
- // Stop if there are no more triangles left
- var halfEdges = Object.keys( halfEdgeList );
- if ( halfEdges.length === 0 ) break;
- // Exhaustively find all connected triangles
- var i = 0;
- var queue = [ fullHalfEdgeList[ halfEdges[ 0 ] ] ];
- while ( i < queue.length ) {
- // initialize all vertex normals in this triangle
- var tri = queue[ i ];
- i ++;
- var faceNormal = tri.faceNormal;
- if ( tri.n0 === null ) {
- tri.n0 = faceNormal.clone();
- normals.push( tri.n0 );
- }
- if ( tri.n1 === null ) {
- tri.n1 = faceNormal.clone();
- normals.push( tri.n1 );
- }
- if ( tri.n2 === null ) {
- tri.n2 = faceNormal.clone();
- normals.push( tri.n2 );
- }
- // Check if any edge is connected to another triangle edge
- for ( var i2 = 0, l2 = 3; i2 < l2; i2 ++ ) {
- var index = i2;
- var next = ( i2 + 1 ) % 3;
- var v0 = tri[ `v${ index }` ];
- var v1 = tri[ `v${ next }` ];
- // delete this triangle from the list so it won't be found again
- var hash = hashEdge( v0, v1 );
- delete halfEdgeList[ hash ];
- var reverseHash = hashEdge( v1, v0 );
- var otherTri = fullHalfEdgeList[ reverseHash ];
- if ( otherTri ) {
- // NOTE: If the angle between triangles is > 67.5 degrees then assume it's
- // hard edge. There are some cases where the line segments do not line up exactly
- // with or span multiple triangle edges (see Lunar Vehicle wheels).
- if ( Math.abs( otherTri.faceNormal.dot( tri.faceNormal ) ) < 0.25 ) {
- continue;
- }
- // if this triangle has already been traversed then it won't be in
- // the halfEdgeList. If it has not then add it to the queue and delete
- // it so it won't be found again.
- if ( reverseHash in halfEdgeList ) {
- queue.push( otherTri );
- delete halfEdgeList[ reverseHash ];
- }
- // Find the matching edge in this triangle and copy the normal vector over
- for ( var i3 = 0, l3 = 3; i3 < l3; i3 ++ ) {
- var otherIndex = i3;
- var otherNext = ( i3 + 1 ) % 3;
- var otherV0 = otherTri[ `v${ otherIndex }` ];
- var otherV1 = otherTri[ `v${ otherNext }` ];
- var otherHash = hashEdge( otherV0, otherV1 );
- if ( otherHash === reverseHash ) {
- if ( otherTri[ `n${ otherIndex }` ] === null ) {
- var norm = tri[ `n${ next }` ];
- otherTri[ `n${ otherIndex }` ] = norm;
- norm.add( otherTri.faceNormal );
- }
- if ( otherTri[ `n${ otherNext }` ] === null ) {
- var norm = tri[ `n${ index }` ];
- otherTri[ `n${ otherNext }` ] = norm;
- norm.add( otherTri.faceNormal );
- }
- break;
- }
- }
- }
- }
- }
- }
- // The normals of each face have been added up so now we average them by normalizing the vector.
- for ( var i = 0, l = normals.length; i < l; i ++ ) {
- normals[ i ].normalize();
- }
- }
- function isPrimitiveType( type ) {
- return /primitive/i.test( type ) || type === 'Subpart';
- }
- function LineParser( line, lineNumber ) {
- this.line = line;
- this.lineLength = line.length;
- this.currentCharIndex = 0;
- this.currentChar = ' ';
- this.lineNumber = lineNumber;
- }
- LineParser.prototype = {
- constructor: LineParser,
- seekNonSpace: function () {
- while ( this.currentCharIndex < this.lineLength ) {
- this.currentChar = this.line.charAt( this.currentCharIndex );
- if ( this.currentChar !== ' ' && this.currentChar !== '\t' ) {
- return;
- }
- this.currentCharIndex ++;
- }
- },
- getToken: function () {
- var pos0 = this.currentCharIndex ++;
- // Seek space
- while ( this.currentCharIndex < this.lineLength ) {
- this.currentChar = this.line.charAt( this.currentCharIndex );
- if ( this.currentChar === ' ' || this.currentChar === '\t' ) {
- break;
- }
- this.currentCharIndex ++;
- }
- var pos1 = this.currentCharIndex;
- this.seekNonSpace();
- return this.line.substring( pos0, pos1 );
- },
- getRemainingString: function () {
- return this.line.substring( this.currentCharIndex, this.lineLength );
- },
- isAtTheEnd: function () {
- return this.currentCharIndex >= this.lineLength;
- },
- setToEnd: function () {
- this.currentCharIndex = this.lineLength;
- },
- getLineNumberString: function () {
- return this.lineNumber >= 0 ? ' at line ' + this.lineNumber : '';
- }
- };
- function sortByMaterial( a, b ) {
- if ( a.colourCode === b.colourCode ) {
- return 0;
- }
- if ( a.colourCode < b.colourCode ) {
- return - 1;
- }
- return 1;
- }
- function createObject( elements, elementSize, isConditionalSegments ) {
- // Creates a THREE.LineSegments (elementSize = 2) or a THREE.Mesh (elementSize = 3 )
- // With per face / segment material, implemented with mesh groups and materials array
- // Sort the triangles or line segments by colour code to make later the mesh groups
- elements.sort( sortByMaterial );
- var positions = [];
- var normals = [];
- var materials = [];
- var bufferGeometry = new THREE.BufferGeometry();
- var prevMaterial = null;
- var index0 = 0;
- var numGroupVerts = 0;
- for ( var iElem = 0, nElem = elements.length; iElem < nElem; iElem ++ ) {
- var elem = elements[ iElem ];
- var v0 = elem.v0;
- var v1 = elem.v1;
- // Note that LDraw coordinate system is rotated 180 deg. in the X axis w.r.t. Three.js's one
- positions.push( v0.x, v0.y, v0.z, v1.x, v1.y, v1.z );
- if ( elementSize === 3 ) {
- positions.push( elem.v2.x, elem.v2.y, elem.v2.z );
- var n0 = elem.n0 || elem.faceNormal;
- var n1 = elem.n1 || elem.faceNormal;
- var n2 = elem.n2 || elem.faceNormal;
- normals.push( n0.x, n0.y, n0.z );
- normals.push( n1.x, n1.y, n1.z );
- normals.push( n2.x, n2.y, n2.z );
- }
- if ( prevMaterial !== elem.material ) {
- if ( prevMaterial !== null ) {
- bufferGeometry.addGroup( index0, numGroupVerts, materials.length - 1 );
- }
- materials.push( elem.material );
- prevMaterial = elem.material;
- index0 = iElem * elementSize;
- numGroupVerts = elementSize;
- } else {
- numGroupVerts += elementSize;
- }
- }
- if ( numGroupVerts > 0 ) {
- bufferGeometry.addGroup( index0, Infinity, materials.length - 1 );
- }
- bufferGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
- if ( elementSize === 3 ) {
- bufferGeometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
- }
- var object3d = null;
- if ( elementSize === 2 ) {
- object3d = new THREE.LineSegments( bufferGeometry, materials );
- } else if ( elementSize === 3 ) {
- object3d = new THREE.Mesh( bufferGeometry, materials );
- }
- if ( isConditionalSegments ) {
- object3d.isConditionalLine = true;
- var controlArray0 = new Float32Array( elements.length * 3 * 2 );
- var controlArray1 = new Float32Array( elements.length * 3 * 2 );
- var directionArray = new Float32Array( elements.length * 3 * 2 );
- for ( var i = 0, l = elements.length; i < l; i ++ ) {
- var os = elements[ i ];
- var c0 = os.c0;
- var c1 = os.c1;
- var v0 = os.v0;
- var v1 = os.v1;
- var index = i * 3 * 2;
- controlArray0[ index + 0 ] = c0.x;
- controlArray0[ index + 1 ] = c0.y;
- controlArray0[ index + 2 ] = c0.z;
- controlArray0[ index + 3 ] = c0.x;
- controlArray0[ index + 4 ] = c0.y;
- controlArray0[ index + 5 ] = c0.z;
- controlArray1[ index + 0 ] = c1.x;
- controlArray1[ index + 1 ] = c1.y;
- controlArray1[ index + 2 ] = c1.z;
- controlArray1[ index + 3 ] = c1.x;
- controlArray1[ index + 4 ] = c1.y;
- controlArray1[ index + 5 ] = c1.z;
- directionArray[ index + 0 ] = v1.x - v0.x;
- directionArray[ index + 1 ] = v1.y - v0.y;
- directionArray[ index + 2 ] = v1.z - v0.z;
- directionArray[ index + 3 ] = v1.x - v0.x;
- directionArray[ index + 4 ] = v1.y - v0.y;
- directionArray[ index + 5 ] = v1.z - v0.z;
- }
- bufferGeometry.setAttribute( 'control0', new THREE.BufferAttribute( controlArray0, 3, false ) );
- bufferGeometry.setAttribute( 'control1', new THREE.BufferAttribute( controlArray1, 3, false ) );
- bufferGeometry.setAttribute( 'direction', new THREE.BufferAttribute( directionArray, 3, false ) );
- }
- return object3d;
- }
- //
- function LDrawLoader( manager ) {
- THREE.Loader.call( this, manager );
- // This is a stack of 'parse scopes' with one level per subobject loaded file.
- // Each level contains a material lib and also other runtime variables passed between parent and child subobjects
- // When searching for a material code, the stack is read from top of the stack to bottom
- // Each material library is an object map keyed by colour codes.
- this.parseScopesStack = null;
- // Array of THREE.Material
- this.materials = [];
- // Not using THREE.Cache here because it returns the previous HTML error response instead of calling onError()
- // This also allows to handle the embedded text files ("0 FILE" lines)
- this.subobjectCache = {};
- // This object is a map from file names to paths. It agilizes the paths search. If it is not set then files will be searched by trial and error.
- this.fileMap = null;
- // Add default main triangle and line edge materials (used in piecess that can be coloured with a main color)
- this.setMaterials( [
- this.parseColourMetaDirective( new LineParser( 'Main_Colour CODE 16 VALUE #FF8080 EDGE #333333' ) ),
- this.parseColourMetaDirective( new LineParser( 'Edge_Colour CODE 24 VALUE #A0A0A0 EDGE #333333' ) )
- ] );
- // If this flag is set to true, each subobject will be a THREE.Object.
- // If not (the default), only one object which contains all the merged primitives will be created.
- this.separateObjects = false;
- // If this flag is set to true the vertex normals will be smoothed.
- this.smoothNormals = true;
- }
- // Special surface finish tag types.
- // Note: "MATERIAL" tag (e.g. GLITTER, SPECKLE) is not implemented
- LDrawLoader.FINISH_TYPE_DEFAULT = 0;
- LDrawLoader.FINISH_TYPE_CHROME = 1;
- LDrawLoader.FINISH_TYPE_PEARLESCENT = 2;
- LDrawLoader.FINISH_TYPE_RUBBER = 3;
- LDrawLoader.FINISH_TYPE_MATTE_METALLIC = 4;
- LDrawLoader.FINISH_TYPE_METAL = 5;
- // State machine to search a subobject path.
- // The LDraw standard establishes these various possible subfolders.
- LDrawLoader.FILE_LOCATION_AS_IS = 0;
- LDrawLoader.FILE_LOCATION_TRY_PARTS = 1;
- LDrawLoader.FILE_LOCATION_TRY_P = 2;
- LDrawLoader.FILE_LOCATION_TRY_MODELS = 3;
- LDrawLoader.FILE_LOCATION_TRY_RELATIVE = 4;
- LDrawLoader.FILE_LOCATION_TRY_ABSOLUTE = 5;
- LDrawLoader.FILE_LOCATION_NOT_FOUND = 6;
- LDrawLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {
- constructor: LDrawLoader,
- load: function ( url, onLoad, onProgress, onError ) {
- if ( ! this.fileMap ) {
- this.fileMap = {};
- }
- var scope = this;
- var fileLoader = new THREE.FileLoader( this.manager );
- fileLoader.setPath( this.path );
- fileLoader.setRequestHeader( this.requestHeader );
- fileLoader.setWithCredentials( this.withCredentials );
- fileLoader.load( url, function ( text ) {
- scope.processObject( text, onLoad, null, url );
- }, onProgress, onError );
- },
- parse: function ( text, path, onLoad ) {
- // Async parse. This function calls onParse with the parsed THREE.Object3D as parameter
- this.processObject( text, onLoad, null, path );
- },
- setMaterials: function ( materials ) {
- // Clears parse scopes stack, adds new scope with material library
- this.parseScopesStack = [];
- this.newParseScopeLevel( materials );
- this.getCurrentParseScope().isFromParse = false;
- this.materials = materials;
- return this;
- },
- setFileMap: function ( fileMap ) {
- this.fileMap = fileMap;
- return this;
- },
- newParseScopeLevel: function ( materials ) {
- // Adds a new scope level, assign materials to it and returns it
- var matLib = {};
- if ( materials ) {
- for ( var i = 0, n = materials.length; i < n; i ++ ) {
- var material = materials[ i ];
- matLib[ material.userData.code ] = material;
- }
- }
- var topParseScope = this.getCurrentParseScope();
- var newParseScope = {
- lib: matLib,
- url: null,
- // Subobjects
- subobjects: null,
- numSubobjects: 0,
- subobjectIndex: 0,
- inverted: false,
- category: null,
- keywords: null,
- // Current subobject
- currentFileName: null,
- mainColourCode: topParseScope ? topParseScope.mainColourCode : '16',
- mainEdgeColourCode: topParseScope ? topParseScope.mainEdgeColourCode : '24',
- currentMatrix: new THREE.Matrix4(),
- matrix: new THREE.Matrix4(),
- // If false, it is a root material scope previous to parse
- isFromParse: true,
- triangles: null,
- lineSegments: null,
- conditionalSegments: null,
- // If true, this object is the start of a construction step
- startingConstructionStep: false
- };
- this.parseScopesStack.push( newParseScope );
- return newParseScope;
- },
- removeScopeLevel: function () {
- this.parseScopesStack.pop();
- return this;
- },
- addMaterial: function ( material ) {
- // Adds a material to the material library which is on top of the parse scopes stack. And also to the materials array
- var matLib = this.getCurrentParseScope().lib;
- if ( ! matLib[ material.userData.code ] ) {
- this.materials.push( material );
- }
- matLib[ material.userData.code ] = material;
- return this;
- },
- getMaterial: function ( colourCode ) {
- // Given a colour code search its material in the parse scopes stack
- if ( colourCode.startsWith( '0x2' ) ) {
- // Special 'direct' material value (RGB colour)
- var colour = colourCode.substring( 3 );
- return this.parseColourMetaDirective( new LineParser( 'Direct_Color_' + colour + ' CODE -1 VALUE #' + colour + ' EDGE #' + colour + '' ) );
- }
- for ( var i = this.parseScopesStack.length - 1; i >= 0; i -- ) {
- var material = this.parseScopesStack[ i ].lib[ colourCode ];
- if ( material ) {
- return material;
- }
- }
- // Material was not found
- return null;
- },
- getParentParseScope: function () {
- if ( this.parseScopesStack.length > 1 ) {
- return this.parseScopesStack[ this.parseScopesStack.length - 2 ];
- }
- return null;
- },
- getCurrentParseScope: function () {
- if ( this.parseScopesStack.length > 0 ) {
- return this.parseScopesStack[ this.parseScopesStack.length - 1 ];
- }
- return null;
- },
- parseColourMetaDirective: function ( lineParser ) {
- // Parses a colour definition and returns a THREE.Material or null if error
- var code = null;
- // Triangle and line colours
- var colour = 0xFF00FF;
- var edgeColour = 0xFF00FF;
- // Transparency
- var alpha = 1;
- var isTransparent = false;
- // Self-illumination:
- var luminance = 0;
- var finishType = LDrawLoader.FINISH_TYPE_DEFAULT;
- var canHaveEnvMap = true;
- var edgeMaterial = null;
- var name = lineParser.getToken();
- if ( ! name ) {
- throw 'LDrawLoader: Material name was expected after "!COLOUR tag' + lineParser.getLineNumberString() + '.';
- }
- // Parse tag tokens and their parameters
- var token = null;
- while ( true ) {
- token = lineParser.getToken();
- if ( ! token ) {
- break;
- }
- switch ( token.toUpperCase() ) {
- case 'CODE':
- code = lineParser.getToken();
- break;
- case 'VALUE':
- colour = lineParser.getToken();
- if ( colour.startsWith( '0x' ) ) {
- colour = '#' + colour.substring( 2 );
- } else if ( ! colour.startsWith( '#' ) ) {
- throw 'LDrawLoader: Invalid colour while parsing material' + lineParser.getLineNumberString() + '.';
- }
- break;
- case 'EDGE':
- edgeColour = lineParser.getToken();
- if ( edgeColour.startsWith( '0x' ) ) {
- edgeColour = '#' + edgeColour.substring( 2 );
- } else if ( ! edgeColour.startsWith( '#' ) ) {
- // Try to see if edge colour is a colour code
- edgeMaterial = this.getMaterial( edgeColour );
- if ( ! edgeMaterial ) {
- throw 'LDrawLoader: Invalid edge colour while parsing material' + lineParser.getLineNumberString() + '.';
- }
- // Get the edge material for this triangle material
- edgeMaterial = edgeMaterial.userData.edgeMaterial;
- }
- break;
- case 'ALPHA':
- alpha = parseInt( lineParser.getToken() );
- if ( isNaN( alpha ) ) {
- throw 'LDrawLoader: Invalid alpha value in material definition' + lineParser.getLineNumberString() + '.';
- }
- alpha = Math.max( 0, Math.min( 1, alpha / 255 ) );
- if ( alpha < 1 ) {
- isTransparent = true;
- }
- break;
- case 'LUMINANCE':
- luminance = parseInt( lineParser.getToken() );
- if ( isNaN( luminance ) ) {
- throw 'LDrawLoader: Invalid luminance value in material definition' + LineParser.getLineNumberString() + '.';
- }
- luminance = Math.max( 0, Math.min( 1, luminance / 255 ) );
- break;
- case 'CHROME':
- finishType = LDrawLoader.FINISH_TYPE_CHROME;
- break;
- case 'PEARLESCENT':
- finishType = LDrawLoader.FINISH_TYPE_PEARLESCENT;
- break;
- case 'RUBBER':
- finishType = LDrawLoader.FINISH_TYPE_RUBBER;
- break;
- case 'MATTE_METALLIC':
- finishType = LDrawLoader.FINISH_TYPE_MATTE_METALLIC;
- break;
- case 'METAL':
- finishType = LDrawLoader.FINISH_TYPE_METAL;
- break;
- case 'MATERIAL':
- // Not implemented
- lineParser.setToEnd();
- break;
- default:
- throw 'LDrawLoader: Unknown token "' + token + '" while parsing material' + lineParser.getLineNumberString() + '.';
- break;
- }
- }
- var material = null;
- switch ( finishType ) {
- case LDrawLoader.FINISH_TYPE_DEFAULT:
- material = new THREE.MeshStandardMaterial( { color: colour, roughness: 0.3, envMapIntensity: 0.3, metalness: 0 } );
- break;
- case LDrawLoader.FINISH_TYPE_PEARLESCENT:
- // Try to imitate pearlescency by setting the specular to the complementary of the color, and low shininess
- var specular = new THREE.Color( colour );
- var hsl = specular.getHSL( { h: 0, s: 0, l: 0 } );
- hsl.h = ( hsl.h + 0.5 ) % 1;
- hsl.l = Math.min( 1, hsl.l + ( 1 - hsl.l ) * 0.7 );
- specular.setHSL( hsl.h, hsl.s, hsl.l );
- material = new THREE.MeshPhongMaterial( { color: colour, specular: specular, shininess: 10, reflectivity: 0.3 } );
- break;
- case LDrawLoader.FINISH_TYPE_CHROME:
- // Mirror finish surface
- material = new THREE.MeshStandardMaterial( { color: colour, roughness: 0, metalness: 1 } );
- break;
- case LDrawLoader.FINISH_TYPE_RUBBER:
- // Rubber finish
- material = new THREE.MeshStandardMaterial( { color: colour, roughness: 0.9, metalness: 0 } );
- canHaveEnvMap = false;
- break;
- case LDrawLoader.FINISH_TYPE_MATTE_METALLIC:
- // Brushed metal finish
- material = new THREE.MeshStandardMaterial( { color: colour, roughness: 0.8, metalness: 0.4 } );
- break;
- case LDrawLoader.FINISH_TYPE_METAL:
- // Average metal finish
- material = new THREE.MeshStandardMaterial( { color: colour, roughness: 0.2, metalness: 0.85 } );
- break;
- default:
- // Should not happen
- break;
- }
- material.transparent = isTransparent;
- material.premultipliedAlpha = true;
- material.opacity = alpha;
- material.depthWrite = ! isTransparent;
- material.polygonOffset = true;
- material.polygonOffsetFactor = 1;
- material.userData.canHaveEnvMap = canHaveEnvMap;
- if ( luminance !== 0 ) {
- material.emissive.set( material.color ).multiplyScalar( luminance );
- }
- if ( ! edgeMaterial ) {
- // This is the material used for edges
- edgeMaterial = new THREE.LineBasicMaterial( {
- color: edgeColour,
- transparent: isTransparent,
- opacity: alpha,
- depthWrite: ! isTransparent
- } );
- edgeMaterial.userData.code = code;
- edgeMaterial.name = name + ' - Edge';
- edgeMaterial.userData.canHaveEnvMap = false;
- // This is the material used for conditional edges
- edgeMaterial.userData.conditionalEdgeMaterial = new THREE.ShaderMaterial( {
- vertexShader: conditionalLineVertShader,
- fragmentShader: conditionalLineFragShader,
- uniforms: THREE.UniformsUtils.merge( [
- THREE.UniformsLib.fog,
- {
- diffuse: {
- value: new THREE.Color( edgeColour )
- },
- opacity: {
- value: alpha
- }
- }
- ] ),
- fog: true,
- transparent: isTransparent,
- depthWrite: ! isTransparent
- } );
- edgeMaterial.userData.conditionalEdgeMaterial.userData.canHaveEnvMap = false;
- }
- material.userData.code = code;
- material.name = name;
- material.userData.edgeMaterial = edgeMaterial;
- return material;
- },
- //
- objectParse: function ( text ) {
- // Retrieve data from the parent parse scope
- var parentParseScope = this.getParentParseScope();
- // Main colour codes passed to this subobject (or default codes 16 and 24 if it is the root object)
- var mainColourCode = parentParseScope.mainColourCode;
- var mainEdgeColourCode = parentParseScope.mainEdgeColourCode;
- var currentParseScope = this.getCurrentParseScope();
- // Parse result variables
- var triangles;
- var lineSegments;
- var conditionalSegments;
- var subobjects = [];
- var category = null;
- var keywords = null;
- if ( text.indexOf( '\r\n' ) !== - 1 ) {
- // This is faster than String.split with regex that splits on both
- text = text.replace( /\r\n/g, '\n' );
- }
- var lines = text.split( '\n' );
- var numLines = lines.length;
- var lineIndex = 0;
- var parsingEmbeddedFiles = false;
- var currentEmbeddedFileName = null;
- var currentEmbeddedText = null;
- var bfcCertified = false;
- var bfcCCW = true;
- var bfcInverted = false;
- var bfcCull = true;
- var type = '';
- var startingConstructionStep = false;
- var scope = this;
- function parseColourCode( lineParser, forEdge ) {
- // Parses next colour code and returns a THREE.Material
- var colourCode = lineParser.getToken();
- if ( ! forEdge && colourCode === '16' ) {
- colourCode = mainColourCode;
- }
- if ( forEdge && colourCode === '24' ) {
- colourCode = mainEdgeColourCode;
- }
- var material = scope.getMaterial( colourCode );
- if ( ! material ) {
- throw 'LDrawLoader: Unknown colour code "' + colourCode + '" is used' + lineParser.getLineNumberString() + ' but it was not defined previously.';
- }
- return material;
- }
- function parseVector( lp ) {
- var v = new THREE.Vector3( parseFloat( lp.getToken() ), parseFloat( lp.getToken() ), parseFloat( lp.getToken() ) );
- if ( ! scope.separateObjects ) {
- v.applyMatrix4( currentParseScope.currentMatrix );
- }
- return v;
- }
- // Parse all line commands
- for ( lineIndex = 0; lineIndex < numLines; lineIndex ++ ) {
- var line = lines[ lineIndex ];
- if ( line.length === 0 ) continue;
- if ( parsingEmbeddedFiles ) {
- if ( line.startsWith( '0 FILE ' ) ) {
- // Save previous embedded file in the cache
- this.subobjectCache[ currentEmbeddedFileName.toLowerCase() ] = currentEmbeddedText;
- // New embedded text file
- currentEmbeddedFileName = line.substring( 7 );
- currentEmbeddedText = '';
- } else {
- currentEmbeddedText += line + '\n';
- }
- continue;
- }
- var lp = new LineParser( line, lineIndex + 1 );
- lp.seekNonSpace();
- if ( lp.isAtTheEnd() ) {
- // Empty line
- continue;
- }
- // Parse the line type
- var lineType = lp.getToken();
- switch ( lineType ) {
- // Line type 0: Comment or META
- case '0':
- // Parse meta directive
- var meta = lp.getToken();
- if ( meta ) {
- switch ( meta ) {
- case '!LDRAW_ORG':
- type = lp.getToken();
- currentParseScope.triangles = [];
- currentParseScope.lineSegments = [];
- currentParseScope.conditionalSegments = [];
- currentParseScope.type = type;
- var isRoot = ! parentParseScope.isFromParse;
- if ( isRoot || scope.separateObjects && ! isPrimitiveType( type ) ) {
- currentParseScope.groupObject = new THREE.Group();
- currentParseScope.groupObject.userData.startingConstructionStep = currentParseScope.startingConstructionStep;
- }
- // If the scale of the object is negated then the triangle winding order
- // needs to be flipped.
- var matrix = currentParseScope.matrix;
- if (
- matrix.determinant() < 0 && (
- scope.separateObjects && isPrimitiveType( type ) ||
- ! scope.separateObjects
- ) ) {
- currentParseScope.inverted = ! currentParseScope.inverted;
- }
- triangles = currentParseScope.triangles;
- lineSegments = currentParseScope.lineSegments;
- conditionalSegments = currentParseScope.conditionalSegments;
- break;
- case '!COLOUR':
- var material = this.parseColourMetaDirective( lp );
- if ( material ) {
- this.addMaterial( material );
- } else {
- console.warn( 'LDrawLoader: Error parsing material' + lp.getLineNumberString() );
- }
- break;
- case '!CATEGORY':
- category = lp.getToken();
- break;
- case '!KEYWORDS':
- var newKeywords = lp.getRemainingString().split( ',' );
- if ( newKeywords.length > 0 ) {
- if ( ! keywords ) {
- keywords = [];
- }
- newKeywords.forEach( function ( keyword ) {
- keywords.push( keyword.trim() );
- } );
- }
- break;
- case 'FILE':
- if ( lineIndex > 0 ) {
- // Start embedded text files parsing
- parsingEmbeddedFiles = true;
- currentEmbeddedFileName = lp.getRemainingString();
- currentEmbeddedText = '';
- bfcCertified = false;
- bfcCCW = true;
- }
- break;
- case 'BFC':
- // Changes to the backface culling state
- while ( ! lp.isAtTheEnd() ) {
- var token = lp.getToken();
- switch ( token ) {
- case 'CERTIFY':
- case 'NOCERTIFY':
- bfcCertified = token === 'CERTIFY';
- bfcCCW = true;
- break;
- case 'CW':
- case 'CCW':
- bfcCCW = token === 'CCW';
- break;
- case 'INVERTNEXT':
- bfcInverted = true;
- break;
- case 'CLIP':
- case 'NOCLIP':
- bfcCull = token === 'CLIP';
- break;
- default:
- console.warn( 'THREE.LDrawLoader: BFC directive "' + token + '" is unknown.' );
- break;
- }
- }
- break;
- case 'STEP':
- startingConstructionStep = true;
- break;
- default:
- // Other meta directives are not implemented
- break;
- }
- }
- break;
- // Line type 1: Sub-object file
- case '1':
- var material = parseColourCode( lp );
- var posX = parseFloat( lp.getToken() );
- var posY = parseFloat( lp.getToken() );
- var posZ = parseFloat( lp.getToken() );
- var m0 = parseFloat( lp.getToken() );
- var m1 = parseFloat( lp.getToken() );
- var m2 = parseFloat( lp.getToken() );
- var m3 = parseFloat( lp.getToken() );
- var m4 = parseFloat( lp.getToken() );
- var m5 = parseFloat( lp.getToken() );
- var m6 = parseFloat( lp.getToken() );
- var m7 = parseFloat( lp.getToken() );
- var m8 = parseFloat( lp.getToken() );
- var matrix = new THREE.Matrix4().set(
- m0, m1, m2, posX,
- m3, m4, m5, posY,
- m6, m7, m8, posZ,
- 0, 0, 0, 1
- );
- var fileName = lp.getRemainingString().trim().replace( /\\/g, '/' );
- if ( scope.fileMap[ fileName ] ) {
- // Found the subobject path in the preloaded file path map
- fileName = scope.fileMap[ fileName ];
- } else {
- // Standardized subfolders
- if ( fileName.startsWith( 's/' ) ) {
- fileName = 'parts/' + fileName;
- } else if ( fileName.startsWith( '48/' ) ) {
- fileName = 'p/' + fileName;
- }
- }
- subobjects.push( {
- material: material,
- matrix: matrix,
- fileName: fileName,
- originalFileName: fileName,
- locationState: LDrawLoader.FILE_LOCATION_AS_IS,
- url: null,
- triedLowerCase: false,
- inverted: bfcInverted !== currentParseScope.inverted,
- startingConstructionStep: startingConstructionStep
- } );
- bfcInverted = false;
- break;
- // Line type 2: Line segment
- case '2':
- var material = parseColourCode( lp, true );
- var segment = {
- material: material.userData.edgeMaterial,
- colourCode: material.userData.code,
- v0: parseVector( lp ),
- v1: parseVector( lp )
- };
- lineSegments.push( segment );
- break;
- // Line type 5: Conditional Line segment
- case '5':
- var material = parseColourCode( lp, true );
- var segment = {
- material: material.userData.edgeMaterial.userData.conditionalEdgeMaterial,
- colourCode: material.userData.code,
- v0: parseVector( lp ),
- v1: parseVector( lp ),
- c0: parseVector( lp ),
- c1: parseVector( lp )
- };
- conditionalSegments.push( segment );
- break;
- // Line type 3: Triangle
- case '3':
- var material = parseColourCode( lp );
- var inverted = currentParseScope.inverted;
- var ccw = bfcCCW !== inverted;
- var doubleSided = ! bfcCertified || ! bfcCull;
- var v0, v1, v2, faceNormal;
- if ( ccw === true ) {
- v0 = parseVector( lp );
- v1 = parseVector( lp );
- v2 = parseVector( lp );
- } else {
- v2 = parseVector( lp );
- v1 = parseVector( lp );
- v0 = parseVector( lp );
- }
- tempVec0.subVectors( v1, v0 );
- tempVec1.subVectors( v2, v1 );
- faceNormal = new THREE.Vector3()
- .crossVectors( tempVec0, tempVec1 )
- .normalize();
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v1,
- v2: v2,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- if ( doubleSided === true ) {
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v2,
- v2: v1,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- }
- break;
- // Line type 4: Quadrilateral
- case '4':
- var material = parseColourCode( lp );
- var inverted = currentParseScope.inverted;
- var ccw = bfcCCW !== inverted;
- var doubleSided = ! bfcCertified || ! bfcCull;
- var v0, v1, v2, v3, faceNormal;
- if ( ccw === true ) {
- v0 = parseVector( lp );
- v1 = parseVector( lp );
- v2 = parseVector( lp );
- v3 = parseVector( lp );
- } else {
- v3 = parseVector( lp );
- v2 = parseVector( lp );
- v1 = parseVector( lp );
- v0 = parseVector( lp );
- }
- tempVec0.subVectors( v1, v0 );
- tempVec1.subVectors( v2, v1 );
- faceNormal = new THREE.Vector3()
- .crossVectors( tempVec0, tempVec1 )
- .normalize();
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v1,
- v2: v2,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v2,
- v2: v3,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- if ( doubleSided === true ) {
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v2,
- v2: v1,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- triangles.push( {
- material: material,
- colourCode: material.userData.code,
- v0: v0,
- v1: v3,
- v2: v2,
- faceNormal: faceNormal,
- n0: null,
- n1: null,
- n2: null
- } );
- }
- break;
- default:
- throw 'LDrawLoader: Unknown line type "' + lineType + '"' + lp.getLineNumberString() + '.';
- break;
- }
- }
- if ( parsingEmbeddedFiles ) {
- this.subobjectCache[ currentEmbeddedFileName.toLowerCase() ] = currentEmbeddedText;
- }
- currentParseScope.category = category;
- currentParseScope.keywords = keywords;
- currentParseScope.subobjects = subobjects;
- currentParseScope.numSubobjects = subobjects.length;
- currentParseScope.subobjectIndex = 0;
- },
- computeConstructionSteps: function ( model ) {
- // Sets userdata.constructionStep number in Group objects and userData.numConstructionSteps number in the root Group object.
- var stepNumber = 0;
- model.traverse( c => {
- if ( c.isGroup ) {
- if ( c.userData.startingConstructionStep ) {
- stepNumber ++;
- }
- c.userData.constructionStep = stepNumber;
- }
- } );
- model.userData.numConstructionSteps = stepNumber + 1;
- },
- processObject: function ( text, onProcessed, subobject, url ) {
- var scope = this;
- var parseScope = scope.newParseScopeLevel();
- parseScope.url = url;
- var parentParseScope = scope.getParentParseScope();
- // Set current matrix
- if ( subobject ) {
- parseScope.currentMatrix.multiplyMatrices( parentParseScope.currentMatrix, subobject.matrix );
- parseScope.matrix.copy( subobject.matrix );
- parseScope.inverted = subobject.inverted;
- parseScope.startingConstructionStep = subobject.startingConstructionStep;
- }
- // Add to cache
- var currentFileName = parentParseScope.currentFileName;
- if ( currentFileName !== null ) {
- currentFileName = parentParseScope.currentFileName.toLowerCase();
- }
- if ( scope.subobjectCache[ currentFileName ] === undefined ) {
- scope.subobjectCache[ currentFileName ] = text;
- }
- // Parse the object (returns a THREE.Group)
- scope.objectParse( text );
- var finishedCount = 0;
- onSubobjectFinish();
- function onSubobjectFinish() {
- finishedCount ++;
- if ( finishedCount === parseScope.subobjects.length + 1 ) {
- finalizeObject();
- } else {
- // Once the previous subobject has finished we can start processing the next one in the list.
- // The subobject processing shares scope in processing so it's important that they be loaded serially
- // to avoid race conditions.
- // Promise.resolve is used as an approach to asynchronously schedule a task _before_ this frame ends to
- // avoid stack overflow exceptions when loading many subobjects from the cache. RequestAnimationFrame
- // will work but causes the load to happen after the next frame which causes the load to take significantly longer.
- var subobject = parseScope.subobjects[ parseScope.subobjectIndex ];
- Promise.resolve().then( function () {
- loadSubobject( subobject );
- } );
- parseScope.subobjectIndex ++;
- }
- }
- function finalizeObject() {
- if ( scope.smoothNormals && parseScope.type === 'Part' ) {
- smoothNormals( parseScope.triangles, parseScope.lineSegments );
- }
- var isRoot = ! parentParseScope.isFromParse;
- if ( scope.separateObjects && ! isPrimitiveType( parseScope.type ) || isRoot ) {
- const objGroup = parseScope.groupObject;
- if ( parseScope.triangles.length > 0 ) {
- objGroup.add( createObject( parseScope.triangles, 3 ) );
- }
- if ( parseScope.lineSegments.length > 0 ) {
- objGroup.add( createObject( parseScope.lineSegments, 2 ) );
- }
- if ( parseScope.conditionalSegments.length > 0 ) {
- objGroup.add( createObject( parseScope.conditionalSegments, 2, true ) );
- }
- if ( parentParseScope.groupObject ) {
- objGroup.name = parseScope.fileName;
- objGroup.userData.category = parseScope.category;
- objGroup.userData.keywords = parseScope.keywords;
- parseScope.matrix.decompose( objGroup.position, objGroup.quaternion, objGroup.scale );
- parentParseScope.groupObject.add( objGroup );
- }
- } else {
- var separateObjects = scope.separateObjects;
- var parentLineSegments = parentParseScope.lineSegments;
- var parentConditionalSegments = parentParseScope.conditionalSegments;
- var parentTriangles = parentParseScope.triangles;
- var lineSegments = parseScope.lineSegments;
- var conditionalSegments = parseScope.conditionalSegments;
- var triangles = parseScope.triangles;
- for ( var i = 0, l = lineSegments.length; i < l; i ++ ) {
- var ls = lineSegments[ i ];
- if ( separateObjects ) {
- ls.v0.applyMatrix4( parseScope.matrix );
- ls.v1.applyMatrix4( parseScope.matrix );
- }
- parentLineSegments.push( ls );
- }
- for ( var i = 0, l = conditionalSegments.length; i < l; i ++ ) {
- var os = conditionalSegments[ i ];
- if ( separateObjects ) {
- os.v0.applyMatrix4( parseScope.matrix );
- os.v1.applyMatrix4( parseScope.matrix );
- os.c0.applyMatrix4( parseScope.matrix );
- os.c1.applyMatrix4( parseScope.matrix );
- }
- parentConditionalSegments.push( os );
- }
- for ( var i = 0, l = triangles.length; i < l; i ++ ) {
- var tri = triangles[ i ];
- if ( separateObjects ) {
- tri.v0 = tri.v0.clone().applyMatrix4( parseScope.matrix );
- tri.v1 = tri.v1.clone().applyMatrix4( parseScope.matrix );
- tri.v2 = tri.v2.clone().applyMatrix4( parseScope.matrix );
- tempVec0.subVectors( tri.v1, tri.v0 );
- tempVec1.subVectors( tri.v2, tri.v1 );
- tri.faceNormal.crossVectors( tempVec0, tempVec1 ).normalize();
- }
- parentTriangles.push( tri );
- }
- }
- scope.removeScopeLevel();
- // If it is root object, compute construction steps
- if ( ! parentParseScope.isFromParse ) {
- scope.computeConstructionSteps( parseScope.groupObject );
- }
- if ( onProcessed ) {
- onProcessed( parseScope.groupObject );
- }
- }
- function loadSubobject( subobject ) {
- parseScope.mainColourCode = subobject.material.userData.code;
- parseScope.mainEdgeColourCode = subobject.material.userData.edgeMaterial.userData.code;
- parseScope.currentFileName = subobject.originalFileName;
- // If subobject was cached previously, use the cached one
- var cached = scope.subobjectCache[ subobject.originalFileName.toLowerCase() ];
- if ( cached ) {
- scope.processObject( cached, function ( subobjectGroup ) {
- onSubobjectLoaded( subobjectGroup, subobject );
- onSubobjectFinish();
- }, subobject, url );
- return;
- }
- // Adjust file name to locate the subobject file path in standard locations (always under directory scope.path)
- // Update also subobject.locationState for the next try if this load fails.
- var subobjectURL = subobject.fileName;
- var newLocationState = LDrawLoader.FILE_LOCATION_NOT_FOUND;
- switch ( subobject.locationState ) {
- case LDrawLoader.FILE_LOCATION_AS_IS:
- newLocationState = subobject.locationState + 1;
- break;
- case LDrawLoader.FILE_LOCATION_TRY_PARTS:
- subobjectURL = 'parts/' + subobjectURL;
- newLocationState = subobject.locationState + 1;
- break;
- case LDrawLoader.FILE_LOCATION_TRY_P:
- subobjectURL = 'p/' + subobjectURL;
- newLocationState = subobject.locationState + 1;
- break;
- case LDrawLoader.FILE_LOCATION_TRY_MODELS:
- subobjectURL = 'models/' + subobjectURL;
- newLocationState = subobject.locationState + 1;
- break;
- case LDrawLoader.FILE_LOCATION_TRY_RELATIVE:
- subobjectURL = url.substring( 0, url.lastIndexOf( '/' ) + 1 ) + subobjectURL;
- newLocationState = subobject.locationState + 1;
- break;
- case LDrawLoader.FILE_LOCATION_TRY_ABSOLUTE:
- if ( subobject.triedLowerCase ) {
- // Try absolute path
- newLocationState = LDrawLoader.FILE_LOCATION_NOT_FOUND;
- } else {
- // Next attempt is lower case
- subobject.fileName = subobject.fileName.toLowerCase();
- subobjectURL = subobject.fileName;
- subobject.triedLowerCase = true;
- newLocationState = LDrawLoader.FILE_LOCATION_AS_IS;
- }
- break;
- case LDrawLoader.FILE_LOCATION_NOT_FOUND:
- // All location possibilities have been tried, give up loading this object
- console.warn( 'LDrawLoader: Subobject "' + subobject.originalFileName + '" could not be found.' );
- return;
- }
- subobject.locationState = newLocationState;
- subobject.url = subobjectURL;
- // Load the subobject
- // Use another file loader here so we can keep track of the subobject information
- // and use it when processing the next model.
- var fileLoader = new THREE.FileLoader( scope.manager );
- fileLoader.setPath( scope.path );
- fileLoader.setRequestHeader( scope.requestHeader );
- fileLoader.setWithCredentials( scope.withCredentials );
- fileLoader.load( subobjectURL, function ( text ) {
- scope.processObject( text, function ( subobjectGroup ) {
- onSubobjectLoaded( subobjectGroup, subobject );
- onSubobjectFinish();
- }, subobject, url );
- }, undefined, function ( err ) {
- onSubobjectError( err, subobject );
- }, subobject );
- }
- function onSubobjectLoaded( subobjectGroup, subobject ) {
- if ( subobjectGroup === null ) {
- // Try to reload
- loadSubobject( subobject );
- return;
- }
- scope.fileMap[ subobject.originalFileName ] = subobject.url;
- }
- function onSubobjectError( err, subobject ) {
- // Retry download from a different default possible location
- loadSubobject( subobject );
- }
- }
- } );
- return LDrawLoader;
- } )();
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