//
// Find the figure segment which acts as the median of this trapezoid
//
public void FindMedian()
{
if (Segment.figureSegments.Count == 0)
{
//Segments have not yet been recorded for the figure, wait to check for median
SetMedianChecked(false);
return;
}
foreach (Segment medianCand in Segment.figureSegments)
{
// The median is parallel to the bases.
if (medianCand.IsParallelWith(this.baseSegment) && medianCand.IsParallelWith(this.oppBaseSegment))
{
// The median must be between the bases and connect to the legs.
Point leftIntersection = leftLeg.FindIntersection(medianCand);
if (leftLeg.PointLiesOnAndExactlyBetweenEndpoints(leftIntersection))
{
Point rightIntersection = rightLeg.FindIntersection(medianCand);
if (rightLeg.PointLiesOnAndExactlyBetweenEndpoints(rightIntersection))
{
// Success, we have a median
// Acquire the exact figure segment (if it exists) otherwise the segment which contains the median
this.median = Segment.GetFigureSegment(leftIntersection, rightIntersection);
// If we have a median at all in the figure
if (this.median != null)
{
// If this is not the exact median, create the exact median.
Segment actualMedian = new Segment(leftIntersection, rightIntersection);
if (!this.median.StructurallyEquals(actualMedian))
{
this.median = actualMedian;
break;
}
}
}
}
}
}
if (this.median == null)
{
this.SetMedianInvalid();
}
SetMedianChecked(true);
}
