@awayjs/stage/lib/shaders/ShaderRegisterElement.ts

Stage for AwayJS

/**
 * A single register element (an entire register or a single register's component) used by the RegisterPool.
 */
export class ShaderRegisterElement {
	private _regName: string;
	private _index: number;
	private _toStr: string;

	private static COMPONENTS = ['x', 'y', 'z', 'w'];

	public _component: number;

	/**
	 * Creates a new ShaderRegisterElement object.
	 *
	 * @param regName The name of the register.
	 * @param index The index of the register.
	 * @param component The register's component, if not the entire register is represented.
	 */
	constructor(regName: string, index: number, component: number = -1) {
		this._component = component;
		this._regName = regName;
		this._index = index;

		this._toStr = this._regName;

		if (this._index >= 0)
			this._toStr += this._index;

		if (component > -1)
			this._toStr += '.' + ShaderRegisterElement.COMPONENTS[component];
	}

	/**
	 * Converts the register or the components AGAL string representation.
	 */
	public toString(): string {
		return this._toStr;
	}

	/**
	 * The register's name.
	 */
	public get regName(): string {
		return this._regName;
	}

	/**
	 * The register's index.
	 */
	public get index(): number {
		return this._index;
	}
}