_getExtendedBreaks( target ) {

		while ( target.length < this.breaks.length ) {

			target.push( new Vector2() );

		}

		target.length = this.breaks.length;

		for ( let i = 0; i < this.cascades; i ++ ) {

			const amount = this.breaks[ i ];
			const prev = this.breaks[ i - 1 ] || 0;
			target[ i ].x = prev;
			target[ i ].y = amount;

		}

	}
Computes the extended breaks for the CSM uniforms.

@private
@param {Array<Vector2>} target - The target array that holds the extended breaks.