internal VEdge(VPoint start, FortuneSite left, FortuneSite right)
{
Start = start;
Left = left;
Right = right;
//for bounding box edges
if (left == null || right == null)
{
return;
}
//from negative reciprocal of slope of line from left to right
//ala m = (left.y -right.y / left.x - right.x)
SlopeRise = left.X - right.X;
SlopeRun = -(left.Y - right.Y);
Intercept = null;
if (SlopeRise.ApproxEqual(0) || SlopeRun.ApproxEqual(0))
{
return;
}
Slope = SlopeRise / SlopeRun;
Intercept = start.Y - Slope * start.X;
}
public void Initialize(VPoint start, FortuneSite left, FortuneSite right)
{
Start = start;
End = VPoint.Default;
Left = left;
Right = right;
IsClipped = false;
Neighbor = null;
//for bounding box edges
if (left == null || right == null)
{
return;
}
//from negative reciprocal of slope of line from left to right
//ala m = (left.y -right.y / left.x - right.x)
SlopeRise = left.X - right.X;
SlopeRun = -(left.Y - right.Y);
Intercept = null;
if (SlopeRise.ApproxEqual(0) || SlopeRun.ApproxEqual(0))
{
return;
}
Slope = SlopeRise / SlopeRun;
Intercept = start.Y - Slope * start.X;
}
