three.js/examples/jsm/nodes/core/InputNode.js

import { TempNode } from './TempNode.js';

function InputNode( type, params ) {

	params = params || {};
	params.shared = params.shared !== undefined ? params.shared : false;

	TempNode.call( this, type, params );

	this.readonly = false;

}

InputNode.prototype = Object.create( TempNode.prototype );
InputNode.prototype.constructor = InputNode;

InputNode.prototype.setReadonly = function ( value ) {

	this.readonly = value;

	this.hashProperties = this.readonly ? [ 'value' ] : undefined;

	return this;

};

InputNode.prototype.getReadonly = function ( /* builder */ ) {

	return this.readonly;

};

InputNode.prototype.copy = function ( source ) {

	TempNode.prototype.copy.call( this, source );

	if ( source.readonly !== undefined ) this.readonly = source.readonly;

	return this;

};

InputNode.prototype.createJSONNode = function ( meta ) {

	var data = TempNode.prototype.createJSONNode.call( this, meta );

	if ( this.readonly === true ) data.readonly = this.readonly;

	return data;

};

InputNode.prototype.generate = function ( builder, output, uuid, type, ns, needsUpdate ) {

	uuid = builder.getUuid( uuid || this.getUuid() );
	type = type || this.getType( builder );

	var data = builder.getNodeData( uuid ),
		readonly = this.getReadonly( builder ) && this.generateReadonly !== undefined;

	if ( readonly ) {

		return this.generateReadonly( builder, output, uuid, type, ns, needsUpdate );

	} else {

		if ( builder.isShader( 'vertex' ) ) {

			if ( ! data.vertex ) {

				data.vertex = builder.createVertexUniform( type, this, ns, needsUpdate, this.getLabel() );

			}

			return builder.format( data.vertex.name, type, output );

		} else {

			if ( ! data.fragment ) {

				data.fragment = builder.createFragmentUniform( type, this, ns, needsUpdate, this.getLabel() );

			}

			return builder.format( data.fragment.name, type, output );

		}

	}

};

export { InputNode };