apl-easy-gl/lib/Loaders/loadMtl.js

Various easy WebGL helper functions

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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Object.defineProperty(exports, "__esModule", { value: true });
var gl_matrix_1 = require("gl-matrix");
var loadFile_1 = require("./loadFile");
var regex = {
    newmtl: /\bnewmtl\s+(.*)\b/,
    ambient: /\bKa\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)\b/,
    diffuse: /\bKd\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)\b/,
    specular: /\bKs\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)\b/,
    intensity: /\bNs\s+([^\s]+)\b/,
    transparent: /\bd\s+([^\s]+)\b/,
    illumination: /\billum\s+([^\s]+)\b/,
    ambientMap: /\bmap_Ka\s+([^\s]+)\b/,
    diffuseMap: /\bmap_Kd\s+([^\s]+)\b/,
    specularMap: /\bmap_Ks\s+([^\s]+)\b/,
    intensityMap: /\bmap_Ns\s+([^\s]+)\b/,
    alphaMap: /\bmap_d\s+([^\s]+)\b/,
    bumpMap: /\bmap_bump\s+([^\s]+)\b/
};
function assignMatchVec3(line, regexp, obj, objKey) {
    var matches = line.match(regexp);
    if (matches) {
        obj[objKey] = gl_matrix_1.vec3.fromValues(parseFloat(matches[1]), parseFloat(matches[2]), parseFloat(matches[3]));
    }
    return obj;
}
function assignMatchVal(line, regexp, obj, objKey) {
    var matches = line.match(regexp);
    if (matches) {
        obj[objKey] = matches[1];
    }
    return obj;
}
function loadMtl(url) {
    return __awaiter(this, void 0, void 0, function () {
        var fileContents, fileLines, materials, currentMaterial;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0: return [4, loadFile_1.loadFile(url)];
                case 1:
                    fileContents = _a.sent(), fileLines = fileContents.split("\n"), materials = {};
                    currentMaterial = {};
                    fileLines.forEach(function (line) {
                        var matches = line.match(regex.newmtl);
                        if (matches) {
                            currentMaterial = {
                                name: matches[1]
                            };
                            materials[currentMaterial.name] = currentMaterial;
                            return;
                        }
                        ['ambient', 'diffuse', 'specular'].forEach(function (name) {
                            assignMatchVec3(line, regex[name], currentMaterial, name);
                        });
                        [
                            'intensity', 'transparent', 'illumination', 'ambientMap',
                            'diffuseMap', 'specularMap', 'intensityMap', 'alphaMap', 'bumpMap'
                        ].forEach(function (name) {
                            assignMatchVal(line, regex[name], currentMaterial, name);
                        });
                    });
                    return [2, materials];
            }
        });
    });
}
exports.loadMtl = loadMtl;