docs: improve JSDoc documentation in utils.js (#32743)

Co-authored-by: Daniel <daniel@contributor.dev>

src/utils.js

@@ -1,3 +1,10 @@
+/**
+ * Finds the minimum value in an array.
+ *
+ * @private
+ * @param {Array<number>} array - The array to search for the minimum value.
+ * @return {number} The minimum value in the array, or Infinity if the array is empty.
+ */
 function arrayMin( array ) {
 
 	if ( array.length === 0 ) return Infinity;
@@ -14,6 +21,13 @@ function arrayMin( array ) {
 
 }
 
+/**
+ * Finds the maximum value in an array.
+ *
+ * @private
+ * @param {Array<number>} array - The array to search for the maximum value.
+ * @return {number} The maximum value in the array, or -Infinity if the array is empty.
+ */
 function arrayMax( array ) {
 
 	if ( array.length === 0 ) return - Infinity;
@@ -30,6 +44,18 @@ function arrayMax( array ) {
 
 }
 
+/**
+ * Checks if an array contains values that require Uint32 representation.
+ *
+ * This function determines whether the array contains any values >= 65535,
+ * which would require a Uint32Array rather than a Uint16Array for proper storage.
+ * The function iterates from the end of the array, assuming larger values are
+ * typically located at the end.
+ *
+ * @private
+ * @param {Array<number>} array - The array to check.
+ * @return {boolean} True if the array contains values >= 65535, false otherwise.
+ */
 function arrayNeedsUint32( array ) {
 
 	// assumes larger values usually on last
@@ -44,6 +70,14 @@ function arrayNeedsUint32( array ) {
 
 }
 
+/**
+ * Map of typed array constructor names to their constructors.
+ * This mapping enables dynamic creation of typed arrays based on string type names.
+ *
+ * @private
+ * @constant
+ * @type {Object<string, TypedArrayConstructor>}
+ */
 const TYPED_ARRAYS = {
 	Int8Array: Int8Array,
 	Uint8Array: Uint8Array,
@@ -56,6 +90,14 @@ const TYPED_ARRAYS = {
 	Float64Array: Float64Array
 };
 
+/**
+ * Creates a typed array of the specified type from the given buffer.
+ *
+ * @private
+ * @param {string} type - The name of the typed array type (e.g., 'Float32Array', 'Uint16Array').
+ * @param {ArrayBuffer} buffer - The buffer to create the typed array from.
+ * @return {TypedArray} A new typed array of the specified type.
+ */
 function getTypedArray( type, buffer ) {
 
 	return new TYPED_ARRAYS[ type ]( buffer );
@@ -74,12 +116,31 @@ function isTypedArray( array ) {
 
 }
 
+/**
+ * Creates an XHTML element with the specified tag name.
+ *
+ * This function uses the XHTML namespace to create DOM elements,
+ * ensuring proper element creation in XML-based contexts.
+ *
+ * @private
+ * @param {string} name - The tag name of the element to create (e.g., 'canvas', 'div').
+ * @return {HTMLElement} The created XHTML element.
+ */
 function createElementNS( name ) {
 
 	return document.createElementNS( 'http://www.w3.org/1999/xhtml', name );
 
 }
 
+/**
+ * Creates a canvas element configured for block display.
+ *
+ * This is a convenience function that creates a canvas element with
+ * display style set to 'block', which is commonly used in three.js
+ * rendering contexts to avoid inline element spacing issues.
+ *
+ * @return {HTMLCanvasElement} A canvas element with display set to 'block'.
+ */
 function createCanvasElement() {
 
 	const canvas = createElementNS( 'canvas' );
@@ -88,22 +149,59 @@ function createCanvasElement() {
 
 }
 
+/**
+ * Internal cache for tracking warning messages to prevent duplicate warnings.
+ *
+ * @private
+ * @type {Object<string, boolean>}
+ */
 const _cache = {};
 
+/**
+ * Custom console function handler for intercepting log, warn, and error calls.
+ *
+ * @private
+ * @type {Function|null}
+ */
 let _setConsoleFunction = null;
 
+/**
+ * Sets a custom function to handle console output.
+ *
+ * This allows external code to intercept and handle console.log, console.warn,
+ * and console.error calls made by three.js, which is useful for custom logging,
+ * testing, or debugging workflows.
+ *
+ * @param {Function} fn - The function to handle console output. Should accept
+ *                        (type, message, ...params) where type is 'log', 'warn', or 'error'.
+ */
 function setConsoleFunction( fn ) {
 
 	_setConsoleFunction = fn;
 
 }
 
+/**
+ * Gets the currently set custom console function.
+ *
+ * @return {Function|null} The custom console function, or null if not set.
+ */
 function getConsoleFunction() {
 
 	return _setConsoleFunction;
 
 }
 
+/**
+ * Logs an informational message with the 'THREE.' prefix.
+ *
+ * If a custom console function is set via setConsoleFunction(), it will be used
+ * instead of the native console.log. The first parameter is treated as the
+ * method name and is automatically prefixed with 'THREE.'.
+ *
+ * @param {...any} params - The message components. The first param is used as
+ *                          the method name and prefixed with 'THREE.'.
+ */
 function log( ...params ) {
 
 	const message = 'THREE.' + params.shift();
@@ -120,6 +218,16 @@ function log( ...params ) {
 
 }
 
+/**
+ * Logs a warning message with the 'THREE.' prefix.
+ *
+ * If a custom console function is set via setConsoleFunction(), it will be used
+ * instead of the native console.warn. The first parameter is treated as the
+ * method name and is automatically prefixed with 'THREE.'.
+ *
+ * @param {...any} params - The message components. The first param is used as
+ *                          the method name and prefixed with 'THREE.'.
+ */
 function warn( ...params ) {
 
 	const message = 'THREE.' + params.shift();
@@ -136,6 +244,16 @@ function warn( ...params ) {
 
 }
 
+/**
+ * Logs an error message with the 'THREE.' prefix.
+ *
+ * If a custom console function is set via setConsoleFunction(), it will be used
+ * instead of the native console.error. The first parameter is treated as the
+ * method name and is automatically prefixed with 'THREE.'.
+ *
+ * @param {...any} params - The message components. The first param is used as
+ *                          the method name and prefixed with 'THREE.'.
+ */
 function error( ...params ) {
 
 	const message = 'THREE.' + params.shift();
@@ -152,6 +270,15 @@ function error( ...params ) {
 
 }
 
+/**
+ * Logs a warning message only once, preventing duplicate warnings.
+ *
+ * This function maintains an internal cache of warning messages and will only
+ * output each unique warning message once. Useful for warnings that may be
+ * triggered repeatedly but should only be shown to the user once.
+ *
+ * @param {...any} params - The warning message components.
+ */
 function warnOnce( ...params ) {
 
 	const message = params.join( ' ' );
@@ -164,6 +291,20 @@ function warnOnce( ...params ) {
 
 }
 
+/**
+ * Asynchronously probes for WebGL sync object completion.
+ *
+ * This function creates a promise that resolves when the WebGL sync object
+ * signals completion or rejects if the sync operation fails. It uses polling
+ * at the specified interval to check the sync status without blocking the
+ * main thread. This is useful for GPU-CPU synchronization in WebGL contexts.
+ *
+ * @private
+ * @param {WebGLRenderingContext|WebGL2RenderingContext} gl - The WebGL rendering context.
+ * @param {WebGLSync} sync - The WebGL sync object to wait for.
+ * @param {number} interval - The polling interval in milliseconds.
+ * @return {Promise<void>} A promise that resolves when the sync completes or rejects if it fails.
+ */
 function probeAsync( gl, sync, interval ) {
 
 	return new Promise( function ( resolve, reject ) {
@@ -193,6 +334,18 @@ function probeAsync( gl, sync, interval ) {
 
 }
 
+/**
+ * Converts a projection matrix from normalized device coordinates (NDC)
+ * range [-1, 1] to [0, 1].
+ *
+ * This conversion is commonly needed when working with depth textures or
+ * render targets that expect depth values in the [0, 1] range rather than
+ * the standard OpenGL NDC range of [-1, 1]. The function modifies the
+ * projection matrix in place.
+ *
+ * @private
+ * @param {Matrix4} projectionMatrix - The projection matrix to convert (modified in place).
+ */
 function toNormalizedProjectionMatrix( projectionMatrix ) {
 
 	const m = projectionMatrix.elements;
@@ -205,6 +358,21 @@ function toNormalizedProjectionMatrix( projectionMatrix ) {
 
 }
 
+/**
+ * Reverses the depth range of a projection matrix.
+ *
+ * This function inverts the depth mapping of a projection matrix, which is
+ * useful for reversed-Z depth buffer techniques that can improve depth
+ * precision. The function handles both perspective and orthographic projection
+ * matrices differently and modifies the matrix in place.
+ *
+ * For perspective matrices (where m[11] === -1), the depth mapping is
+ * reversed with an offset. For orthographic matrices, a simpler reversal
+ * is applied.
+ *
+ * @private
+ * @param {Matrix4} projectionMatrix - The projection matrix to reverse (modified in place).
+ */
 function toReversedProjectionMatrix( projectionMatrix ) {
 
 	const m = projectionMatrix.elements;