code: function(largestPossibleRadius, furthestLimits, furthestAngles) {
  		var me = this;
  		var radiusReductionLeft = furthestLimits.l / Math.sin(furthestAngles.l);
  		var radiusReductionRight = Math.max(furthestLimits.r - me.width, 0) / Math.sin(furthestAngles.r);
  		var radiusReductionTop = -furthestLimits.t / Math.cos(furthestAngles.t);
  		var radiusReductionBottom = -Math.max(furthestLimits.b - (me.height - me.paddingTop), 0) / Math.cos(furthestAngles.b);
  
  		radiusReductionLeft = numberOrZero(radiusReductionLeft);
  		radiusReductionRight = numberOrZero(radiusReductionRight);
  		radiusReductionTop = numberOrZero(radiusReductionTop);
  		radiusReductionBottom = numberOrZero(radiusReductionBottom);
  
  		me.drawingArea = Math.min(
  			Math.floor(largestPossibleRadius - (radiusReductionLeft + radiusReductionRight) / 2),
  			Math.floor(largestPossibleRadius - (radiusReductionTop + radiusReductionBottom) / 2));
  		me.setCenterPoint(radiusReductionLeft, radiusReductionRight, radiusReductionTop, radiusReductionBottom);
  	}
docs: Set radius reductions and determine new radius and center point
  @private