Examples: Convert exporters to ES6. (#21605)

Author: Mugen87

examples/js/exporters/ColladaExporter.js

@@ -15,11 +15,17 @@
  */
 
 	/* global DracoEncoderModule */
-	var DRACOExporter = function () {};
-
-	DRACOExporter.prototype = {
-		constructor: DRACOExporter,
-		parse: function ( object, options ) {
+	class DRACOExporter {
+
+		parse( object, options = {
+			decodeSpeed: 5,
+			encodeSpeed: 5,
+			encoderMethod: DRACOExporter.MESH_EDGEBREAKER_ENCODING,
+			quantization: [ 16, 8, 8, 8, 8 ],
+			exportUvs: true,
+			exportNormals: true,
+			exportColor: false
+		} ) {
 
 			if ( object.isBufferGeometry === true ) {
 
@@ -33,25 +39,11 @@
 
 			}
 
-			if ( options === undefined ) {
-
-				options = {
-					decodeSpeed: 5,
-					encodeSpeed: 5,
-					encoderMethod: DRACOExporter.MESH_EDGEBREAKER_ENCODING,
-					quantization: [ 16, 8, 8, 8, 8 ],
-					exportUvs: true,
-					exportNormals: true,
-					exportColor: false
-				};
-
-			}
-
-			var geometry = object.geometry;
-			var dracoEncoder = DracoEncoderModule();
-			var encoder = new dracoEncoder.Encoder();
-			var builder;
-			var dracoObject;
+			const geometry = object.geometry;
+			const dracoEncoder = DracoEncoderModule();
+			const encoder = new dracoEncoder.Encoder();
+			let builder;
+			let dracoObject;
 
 			if ( geometry.isBufferGeometry !== true ) {
 
@@ -63,19 +55,19 @@
 
 				builder = new dracoEncoder.MeshBuilder();
 				dracoObject = new dracoEncoder.Mesh();
-				var vertices = geometry.getAttribute( 'position' );
+				const vertices = geometry.getAttribute( 'position' );
 				builder.AddFloatAttributeToMesh( dracoObject, dracoEncoder.POSITION, vertices.count, vertices.itemSize, vertices.array );
-				var faces = geometry.getIndex();
+				const faces = geometry.getIndex();
 
 				if ( faces !== null ) {
 
 					builder.AddFacesToMesh( dracoObject, faces.count / 3, faces.array );
 
 				} else {
 
-					var faces = new ( vertices.count > 65535 ? Uint32Array : Uint16Array )( vertices.count );
+					const faces = new ( vertices.count > 65535 ? Uint32Array : Uint16Array )( vertices.count );
 
-					for ( var i = 0; i < faces.length; i ++ ) {
+					for ( let i = 0; i < faces.length; i ++ ) {
 
 						faces[ i ] = i;
 
@@ -87,7 +79,7 @@
 
 				if ( options.exportNormals === true ) {
 
-					var normals = geometry.getAttribute( 'normal' );
+					const normals = geometry.getAttribute( 'normal' );
 
 					if ( normals !== undefined ) {
 
@@ -99,7 +91,7 @@
 
 				if ( options.exportUvs === true ) {
 
-					var uvs = geometry.getAttribute( 'uv' );
+					const uvs = geometry.getAttribute( 'uv' );
 
 					if ( uvs !== undefined ) {
 
@@ -111,7 +103,7 @@
 
 				if ( options.exportColor === true ) {
 
-					var colors = geometry.getAttribute( 'color' );
+					const colors = geometry.getAttribute( 'color' );
 
 					if ( colors !== undefined ) {
 
@@ -125,12 +117,12 @@
 
 				builder = new dracoEncoder.PointCloudBuilder();
 				dracoObject = new dracoEncoder.PointCloud();
-				var vertices = geometry.getAttribute( 'position' );
+				const vertices = geometry.getAttribute( 'position' );
 				builder.AddFloatAttribute( dracoObject, dracoEncoder.POSITION, vertices.count, vertices.itemSize, vertices.array );
 
 				if ( options.exportColor === true ) {
 
-					var colors = geometry.getAttribute( 'color' );
+					const colors = geometry.getAttribute( 'color' );
 
 					if ( colors !== undefined ) {
 
@@ -147,10 +139,10 @@
 			} //Compress using draco encoder
 
 
-			var encodedData = new dracoEncoder.DracoInt8Array(); //Sets the desired encoding and decoding speed for the given options from 0 (slowest speed, but the best compression) to 10 (fastest, but the worst compression).
+			const encodedData = new dracoEncoder.DracoInt8Array(); //Sets the desired encoding and decoding speed for the given options from 0 (slowest speed, but the best compression) to 10 (fastest, but the worst compression).
 
-			var encodeSpeed = options.encodeSpeed !== undefined ? options.encodeSpeed : 5;
-			var decodeSpeed = options.decodeSpeed !== undefined ? options.decodeSpeed : 5;
+			const encodeSpeed = options.encodeSpeed !== undefined ? options.encodeSpeed : 5;
+			const decodeSpeed = options.decodeSpeed !== undefined ? options.decodeSpeed : 5;
 			encoder.SetSpeedOptions( encodeSpeed, decodeSpeed ); // Sets the desired encoding method for a given geometry.
 
 			if ( options.encoderMethod !== undefined ) {
@@ -163,7 +155,7 @@
 
 			if ( options.quantization !== undefined ) {
 
-				for ( var i = 0; i < 5; i ++ ) {
+				for ( let i = 0; i < 5; i ++ ) {
 
 					if ( options.quantization[ i ] !== undefined ) {
 
@@ -175,7 +167,7 @@
 
 			}
 
-			var length;
+			let length;
 
 			if ( object.isMesh === true ) {
 
@@ -196,9 +188,9 @@
 			} //Copy encoded data to buffer.
 
 
-			var outputData = new Int8Array( new ArrayBuffer( length ) );
+			const outputData = new Int8Array( new ArrayBuffer( length ) );
 
-			for ( var i = 0; i < length; i ++ ) {
+			for ( let i = 0; i < length; i ++ ) {
 
 				outputData[ i ] = encodedData.GetValue( i );
 
@@ -210,7 +202,9 @@
 			return outputData;
 
 		}
-	}; // Encoder methods
+
+	} // Encoder methods
+
 
 	DRACOExporter.MESH_EDGEBREAKER_ENCODING = 1;
 	DRACOExporter.MESH_SEQUENTIAL_ENCODING = 0; // Geometry type