setScissor( x, y, width, height ) {

		const scissor = this._scissor;

		if ( x.isVector4 ) {

			scissor.copy( x );

		} else {

			scissor.set( x, y, width, height );

		}

	}
Defines the scissor rectangle.

@param {number | Vector4} x - The horizontal coordinate for the lower left corner of the box in logical pixel unit.
Instead of passing four arguments, the method also works with a single four-dimensional vector.
@param {number} y - The vertical coordinate for the lower left corner of the box in logical pixel unit.
@param {number} width - The width of the scissor box in logical pixel unit.
@param {number} height - The height of the scissor box in logical pixel unit.