scissor( x, y, width, height ) {

		const scissor = this._tempVec4.set( x, y, width, height );

		if ( this.currentScissor.equals( scissor ) === false ) {

			const { gl } = this;

			gl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );
			this.currentScissor.copy( scissor );

		}

	}
Specifies the scissor box.

@param {number} x - The x-coordinate of the lower left corner of the viewport.
@param {number} y - The y-coordinate of the lower left corner of the viewport.
@param {number} width - The width of the viewport.
@param {number} height - The height of the viewport.