Port t3d/library to typescript (njibhu#193)

Author: njibhu

library/.gitignore

@@ -5,3 +5,4 @@ node_modules/
 .text
 
 build
+build*

library/gulpfile.js

@@ -1,50 +1,31 @@
 "use strict";
 
 /* Gulp modules and requires */
-const browserify = require("browserify");
 const gulp = require("gulp");
-const source = require("vinyl-source-stream");
-const buffer = require("vinyl-buffer");
-const sourcemaps = require("gulp-sourcemaps");
-const log = require("gulplog");
-const uglifyjs = require("uglify-es");
-const composer = require("gulp-uglify/composer");
-const uglify = composer(uglifyjs, console);
-const tsify = require("tsify");
+const rollup = require('rollup');
+const resolve = require('@rollup/plugin-node-resolve');
+const commonjs = require('@rollup/plugin-commonjs');
+const typescript = require('@rollup/plugin-typescript');
 
-gulp.task("T3D", function () {
-  // set up the browserify instance on a task basis
-  const b = browserify({
-    entries: "./src/T3DLib.js",
-    debug: true,
-    standalone: "T3D",
-  }).plugin(tsify, {
-    allowJs: true,
-  });
-
-  return (
-    b
-      .bundle()
-      .pipe(source(`T3D.js`))
-      .pipe(buffer())
-      .pipe(sourcemaps.init({ loadMaps: true }))
-      // Add transformation tasks to the pipeline here.
-      .pipe(uglify())
-      .on("error", log.error)
-      .pipe(sourcemaps.write("./"))
-      .pipe(gulp.dest("build"))
-  );
-});
-
-gulp.task("copy", function () {
-  return gulp
-    .src([`./build/T3D.js`, `./build/T3D.js.map`])
-    .pipe(gulp.dest("../examples/dist/static"))
-    .pipe(gulp.dest("../explorer/dist/static"));
-});
-
-gulp.task("watch", function () {
-  gulp.watch(["src/**/*.js"], gulp.series("T3D"));
+gulp.task('T3D', () => {
+	return rollup
+		.rollup({
+			input: './src/T3DLib.ts',
+      plugins: [
+        resolve(),
+        commonjs(),
+        typescript(),
+      ]
+		})
+		.then(bundle => {
+			return bundle.write({
+				file: './build/T3D.js',
+				format: 'iife',
+				name: 'T3D',
+				sourcemap: true
+			});
+		});
 });
 
-gulp.task("default", gulp.series("T3D"));
+// Default task
+gulp.task('default', gulp.series('T3D'));