MathUtils: Use crypto.randomUUID() when available. (#22556)

* MathUtils: Use crypto.randomUUID() when available.

* MathUtils: Define generateUUID outside statement.

* MathUtils: Fixed linting issues.

* MathUtils: Made crypto check more robust.

* MathUtils: Added TODO note.

* MathUtils: Fixed linting issues again.

src/math/MathUtils.js

@@ -1,31 +1,46 @@
-const _lut = [];
+let _seed = 1234567;
 
-for ( let i = 0; i < 256; i ++ ) {
+const DEG2RAD = Math.PI / 180;
+const RAD2DEG = 180 / Math.PI;
 
-	_lut[ i ] = ( i < 16 ? '0' : '' ) + ( i ).toString( 16 );
+let generateUUID;
 
-}
+if ( typeof crypto !== 'undefined' && 'randomUUID' in crypto ) {
 
-let _seed = 1234567;
+	generateUUID = function generateUUID() {
 
+		return crypto.randomUUID().toUpperCase();
 
-const DEG2RAD = Math.PI / 180;
-const RAD2DEG = 180 / Math.PI;
+	};
+
+} else {
+
+	// TODO Remove this code when crypto.randomUUID() is available everywhere
+
+	const _lut = [];
+
+	for ( let i = 0; i < 256; i ++ ) {
+
+		_lut[ i ] = ( i < 16 ? '0' : '' ) + ( i ).toString( 16 );
+
+	}
+
+	// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
+	generateUUID = function generateUUID() {
 
-// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136
-function generateUUID() {
+		const d0 = Math.random() * 0xffffffff | 0;
+		const d1 = Math.random() * 0xffffffff | 0;
+		const d2 = Math.random() * 0xffffffff | 0;
+		const d3 = Math.random() * 0xffffffff | 0;
+		const uuid = _lut[ d0 & 0xff ] + _lut[ d0 >> 8 & 0xff ] + _lut[ d0 >> 16 & 0xff ] + _lut[ d0 >> 24 & 0xff ] + '-' +
+				_lut[ d1 & 0xff ] + _lut[ d1 >> 8 & 0xff ] + '-' + _lut[ d1 >> 16 & 0x0f | 0x40 ] + _lut[ d1 >> 24 & 0xff ] + '-' +
+				_lut[ d2 & 0x3f | 0x80 ] + _lut[ d2 >> 8 & 0xff ] + '-' + _lut[ d2 >> 16 & 0xff ] + _lut[ d2 >> 24 & 0xff ] +
+				_lut[ d3 & 0xff ] + _lut[ d3 >> 8 & 0xff ] + _lut[ d3 >> 16 & 0xff ] + _lut[ d3 >> 24 & 0xff ];
 
-	const d0 = Math.random() * 0xffffffff | 0;
-	const d1 = Math.random() * 0xffffffff | 0;
-	const d2 = Math.random() * 0xffffffff | 0;
-	const d3 = Math.random() * 0xffffffff | 0;
-	const uuid = _lut[ d0 & 0xff ] + _lut[ d0 >> 8 & 0xff ] + _lut[ d0 >> 16 & 0xff ] + _lut[ d0 >> 24 & 0xff ] + '-' +
-			_lut[ d1 & 0xff ] + _lut[ d1 >> 8 & 0xff ] + '-' + _lut[ d1 >> 16 & 0x0f | 0x40 ] + _lut[ d1 >> 24 & 0xff ] + '-' +
-			_lut[ d2 & 0x3f | 0x80 ] + _lut[ d2 >> 8 & 0xff ] + '-' + _lut[ d2 >> 16 & 0xff ] + _lut[ d2 >> 24 & 0xff ] +
-			_lut[ d3 & 0xff ] + _lut[ d3 >> 8 & 0xff ] + _lut[ d3 >> 16 & 0xff ] + _lut[ d3 >> 24 & 0xff ];
+		// .toUpperCase() here flattens concatenated strings to save heap memory space.
+		return uuid.toUpperCase();
 
-	// .toUpperCase() here flattens concatenated strings to save heap memory space.
-	return uuid.toUpperCase();
+	};
 
 }