510 lines
13 KiB
JavaScript
510 lines
13 KiB
JavaScript
/**
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* @namespace
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*/
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var mesh = {};
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/**
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* Reprensents a mesh
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* @constructor
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* @memberOf mesh
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*/
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mesh.Mesh = function() {
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this.vertices = [];
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this.faces = [];
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this.texCoords = [];
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this.normals = [];
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this.faceIndex = 0;
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this.material = null;
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this.started = false;
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this.finished = false;
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}
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/**
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* Checks if there are normals in the mesh
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* @returns {Boolean} true if there are normals in the mesh, false otherwise
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*/
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mesh.Mesh.prototype.hasNormals = function() {
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return this.normals.length > 0;
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}
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/**
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* Checks if there are texture coordinates in the mesh
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* @returns {Boolean} true if there are texture coordinates in the mesh, false otherwise
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*/
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mesh.Mesh.prototype.hasTexCoords = function() {
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return this.texCoords.length > 0;
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}
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/**
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* Adds a vertex to a mesh
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* @param {mesh.Vertex|String} A Vertex object or its string representation
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*/
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mesh.Mesh.prototype.addVertex = function(vertex) {
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if (vertex instanceof mesh.Vertex) {
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this.vertices.push(vertex);
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} else if (typeof vertex === 'string' || vertex instanceof String) {
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this.vertices.push(new mesh.Vertex(vertex));
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} else {
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console.error("Can only add vertex from mesh.Vertex or string");
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return;
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}
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return this.vertices[this.vertices.length - 1];
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}
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/**
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* Adds a face to a mesh
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* @param {mesh.Face|String} A Face object or its string representation
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*/
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mesh.Mesh.prototype.addFaces = function(face) {
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var faces;
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if (face instanceof mesh.Face) {
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this.faces.push(face);
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} else if (typeof face === 'string' || face instanceof String) {
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faces = parseFace(face);
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this.faces = this.faces.concat(faces);
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} else {
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console.error("Can only add face from mesh.Face or string");
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return;
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}
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if (faces === undefined) {
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return this.faces[this.faces.length - 1];
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} else {
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return faces;
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}
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}
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/**
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* Adds a texture coordinate to a mesh
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* @param {mesh.TexCoord|String} A TexCoord object or its string representation
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*/
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mesh.Mesh.prototype.addTexCoord = function(texCoord) {
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if (texCoord instanceof mesh.TexCoord) {
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this.texCoords.push(texCoord);
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} else if (typeof texCoord === 'string' || texCoord instanceof String) {
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this.texCoords.push(new mesh.TexCoord(texCoord));
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} else {
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console.error("Can only add texCoord from mesh.TexCoord or string");
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return;
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}
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return this.texCoords[this.texCoords.length - 1];
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}
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/**
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* Adds a normal to a mesh
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* @param {mesh.Normal|String} A Normal object or its string representation
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*/
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mesh.Mesh.prototype.addNormal = function(normal) {
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if (normal instanceof mesh.Normal) {
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this.normals.push(normal);
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} else if (typeof normal === 'string' || normal instanceof String) {
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this.normals.push(new mesh.Normal(normal));
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} else {
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console.error("Can only add normal from mesh.Normal of string");
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return;
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}
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return this.normals[this.normals.length - 1];
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}
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mesh.Mesh.prototype.isFinished = function() {
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return this.faceIndex === this.faces.length;
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}
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/**
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* Represent a 3D vertex
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* @constructor
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* @memberOf mesh
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*/
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mesh.Vertex = function() {
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if (typeof arguments[0] === 'string' || arguments[0] instanceof String) {
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var split = arguments[0].replace(/\s+/g, " ").split(' ');
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/**
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* x coordinate of the vertex
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* @type {Number}
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*/
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this.x = parseFloat(split[1]);
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/**
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* y coordinate of the vertex
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* @type {Number}
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*/
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this.y = parseFloat(split[2]);
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/**
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* z coordinate of the vertex
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* @type {Number}
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*/
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this.z = parseFloat(split[3]);
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}
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/**
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* Indicates if the vertex has been sent or not
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* @type {Boolean}
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*/
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this.sent = false;
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}
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/**
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* Gives a list representation of the vertex
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* @returns {Array} An array representing the vertex
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*
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* @example
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* var vertex = new mesh.Vertex('v 3.5 3.6 3.7');
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* vertex.index = 5;
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* console.log(vertex.toList()); // Prints ['v', 5, 3.5, 3.6, 3.7]
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*/
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mesh.Vertex.prototype.toList = function() {
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return ['v', this.index, this.x, this.y, this.z];
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}
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/**
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* Gives a string representation of the vertex
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* @returns {string} A string representing the vertex
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*
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* @example
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* var vertex = new mesh.Vertex('v 3.5 3.6 3.7');
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* console.log(vertex.toString()); // Prints v 3.5 3.6 3.7
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*/
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mesh.Vertex.prototype.toString = function() {
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return 'v ' + this.x + ' ' + this.y + ' ' + this.z;
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}
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/**
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* Represent a 3D normal
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* @constructor
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* @memberOf mesh
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* @augments mesh.Vertex
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*/
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mesh.Normal = function() {
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mesh.Vertex.apply(this, arguments);
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}
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mesh.Normal.prototype = Object.create(mesh.Vertex.prototype);
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mesh.Normal.prototype.constructor = mesh.Normal;
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/**
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* Gives a list representation of the normal
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* @returns {Array} An array representing the normal
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*
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* @example
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* var normal = new mesh.Normal('vn 3.5 3.6 3.7');
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* normal.index = 5;
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* console.log(normal.toList()); // Prints ['vn', 5, 3.5, 3.6, 3.7]
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*/
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mesh.Normal.prototype.toList = function() {
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var superObject = mesh.Vertex.prototype.toList.call(this);
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superObject[0] = 'vn';
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return superObject;
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}
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/**
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* Gives a string representation of the normal
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* @returns {string} A string representing the normal
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*
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* @example
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* var normal = new mesh.Normal('vn 3.5 3.6 3.7');
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* console.log(normal.toString()); // Prints vn 3.5 3.6 3.7
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*/
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mesh.Normal.prototype.toString = function() {
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var superObject = mesh.Vertex.prototype.toString.call(this);
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superObject.replace('v', 'vn');
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return superObject;
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}
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/**
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* Represent a texture coordinate element
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* @constructor
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* @memberOf mesh
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*/
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mesh.TexCoord = function() {
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if (typeof arguments[0] === 'string' || arguments[0] instanceof String) {
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var split = arguments[0].replace(/\s+/g, " ").split(' ');
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/**
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* x coordinate of the texture
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* @type {Number}
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*/
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this.x = parseFloat(split[1]);
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/**
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* y coordinate of the texture
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* @type {Number}
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*/
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this.y = parseFloat(split[2]);
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}
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/**
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* Indicates if the vertex has been sent or not
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* @type {Boolean}
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*/
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this.sent = false;
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}
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/**
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* Gives a list representation of the texture coordinate
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* @returns {Array} An array representing the texture coordinate
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*
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* @example
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* var texCoord = new mesh.TexCoord('vt 3.5 3.6');
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* texture coordinate.index = 5;
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* console.log(texture coordinate.toList()); // Prints ['vt', 5, 3.5, 3.6]
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*/
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mesh.TexCoord.prototype.toList = function() {
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return ['vt', this.index, this.x, this.y];
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}
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/**
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* Gives a string representation of the texture coordinate
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* @returns {string} A string representing the texture coordinate
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*
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* @example
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* var texCoord = new mesh.TexCoord('vt 3.5 3.6');
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* console.log(texCoord.toString()); // Prints vt 3.5 3.6
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*/
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mesh.TexCoord.prototype.toString = function() {
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return 'vt ' + this.x + ' ' + this.y;
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}
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/**
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* Represents a face
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* @constructor
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* @memberOf mesh
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*/
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mesh.Face = function() {
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if (typeof arguments[0] === 'string' || arguments[0] instanceof String) {
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if (arguments[0].indexOf('/') === -1) {
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// No / : easy win : "f 1 2 3" or "f 1 2 3 4"
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var split = arguments[0].replace(/\s+/g, ' ').split(' ');
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this.a = parseInt(split[1]) - 1;
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this.b = parseInt(split[2]) - 1;
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this.c = parseInt(split[3]) - 1;
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} else {
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// There might be textures coords
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var split = arguments[0].replace(/\s+/g, ' ').trim().split(' ');
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// Split elements
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var split1 = split[1].split('/');
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var split2 = split[2].split('/');
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var split3 = split[3].split('/');
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var vIndex = 0;
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var tIndex = 1;
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var nIndex = 2;
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/**
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* index of the first vertex of the face
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* @type {Number}
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*/
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this.a = parseInt(split1[vIndex]) - 1;
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/**
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* index of the second vertex of the face
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* @type {Number}
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*/
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this.b = parseInt(split2[vIndex]) - 1;
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/**
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* index of the third vertex of the face
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* @type {Number}
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*/
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this.c = parseInt(split3[vIndex]) - 1;
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/**
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* index of the texture coordinate of the first vertex of the face
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* @type {Number}
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*/
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this.aTexture = parseInt(split1[tIndex]) - 1;
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/**
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* index of the texture coordinate of the second vertex of the face
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* @type {Number}
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*/
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this.bTexture = parseInt(split2[tIndex]) - 1;
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/**
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* index of the texture coordinate of the third vertex of the face
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* @type {Number}
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*/
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this.cTexture = parseInt(split3[tIndex]) - 1;
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/**
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* index of the normal of the first vertex of the face
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* @type {Number}
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*/
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this.aNormal = parseInt(split1[nIndex]) - 1;
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/**
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* index of the normal of the second vertex of the face
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* @type {Number}
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*/
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this.bNormal = parseInt(split2[nIndex]) - 1;
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/**
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* index of the normal of the third vertex of the face
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* @type {Number}
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*/
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this.cNormal = parseInt(split3[nIndex]) - 1;
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}
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}
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/**
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* Indicates if the vertex has been sent or not
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* @type {Boolean}
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*/
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this.sent = false;
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}
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/**
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* Parse a face line and returns an array of faces
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*
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* @private
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* @param {String} a string representing a face
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* @returns {Face[]} a single 3-vertices face or two 3-vertices face if it was
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* a 4-vertices face
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*/
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var parseFace = function(arg) {
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var split = arg.trim().split(' ');
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var ret = [];
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// Face3
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if (split.length >= 4) {
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ret.push(new mesh.Face(arg));
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}
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// Face3 == 2 * Face3
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if (split.length >= 5) {
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ret.push(new mesh.Face(
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[
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split[0],
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split[1],
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split[3],
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split[4]
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].join(' ')
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));
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}
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return ret;
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}
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/**
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* Returns the max index of the vertices of the face
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* @returns {Number} the max index of the vertices
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*/
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mesh.Face.prototype.max = function() {
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if (this.d !== undefined) {
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return Math.max(this.a, this.b, this.c, this.d);
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} else {
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return Math.max(this.a, this.b, this.c);
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}
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}
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/**
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* Returns the max index of the texture coordinates of the face
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* @returns {Number} the max index of the texture coordinates
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*/
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mesh.Face.prototype.maxTexture = function() {
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if (this.dTexture) {
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return Math.max(this.aTexture, this.bTexture, this.cTexture, this.dTexture);
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} else {
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return Math.max(this.aTexture, this.bTexture, this.cTexture);
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}
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}
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/**
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* Gives a list representation of the face
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* @returns {Array} An array representing the texture coordinate
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* <ol start=0>
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* <li>'f'</li>
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* <li>the index of the face</li>
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* <li>a list containing the indices of the vertex of the face</li>
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* <li>a list containing the indices of the texture coordinates</li>
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* <li>a list containing the indices of the normals</li>
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* </ol>
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*
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* @example
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* var face = new mesh.Face('f 1/2/3 4/5/6 7/8/9');
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* texture coordinate.index = 5;
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* console.log(texture coordinate.toList()); // Prints ['f', 5, [1,4,7], [2,5,8], [3,6,9]]
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*/
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mesh.Face.prototype.toList = function() {
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var l = ['f', this.index, this.meshIndex,
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[this.a, this.b, this.c ],
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isNaN(this.aTexture) ? [] : [this.aTexture, this.bTexture, this.cTexture],
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isNaN(this.aNormal ) ? [] : [this.aNormal, this.bNormal, this.cNormal ]
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];
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// if (this.d !== undefined)
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// l.push(this.d);
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// if (this.aTexture !== undefined) {
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// l.push(this.aTexture);
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// l.push(this.bTexture);
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// l.push(this.cTexture);
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// }
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// if (this.dTexture !== undefined)
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// l.push(this.dTexture);
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return l;
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}
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/**
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* Gives a string representation of the face
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* @returns {string} A string representing the face
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*
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* @example
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* var face = new mesh.Face('f 3 5 6');
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* console.log(face.toString()); // Prints f 3 5 6
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*/
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mesh.Face.prototype.toString = function() {
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return 'f ' + this.a + ' ' + this.b + ' ' + this.c + (this.d !== undefined ? ' ' + this.d : '');
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}
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/**
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* Represents a material name
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* @constructor
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* @param {string} line the string representing the material
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* @memberOf mesh
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*/
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mesh.Material = function() {
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var split = arguments[0].replace(/\s+/g, ' ').trim().split(' ');
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/**
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* The name of the material
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* @type {string}
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*/
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this.name = split[1];
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}
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/**
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* Gives a string representation of the material
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* @returns {string} obj representation of usemtl
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*/
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mesh.Material.prototype.toString = function() {
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return 'usemtl ' + this.name;
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}
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/**
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* Gives a list representation of the material
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* @returns {array} an array representing the material
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* @example
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* var material = new mesh.Material('usemtl MyMaterial');
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* console.log(material.toList()); // Logs ['u', 'MyMaterial']
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*/
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mesh.Material.prototype.toList = function() {
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return ['u', this.name];
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}
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module.exports = mesh;
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