bool PointIsCloseToLine(double xLeft, double yLeft, double xInt, double yInt,
double xRight, double yRight)
{
double xProj, yProj;
NuGenMath.ProjectPointOnToLine(xInt, yInt, xLeft, yLeft, xRight, yRight, out xProj, out yProj);
return(
(xInt - xProj) * (xInt - xProj) +
(yInt - yProj) * (yInt - yProj) < 0.5 * 0.5);
}
// add point to pointset, not worrying about keeping the pointset single valued (which is for
// curves only). if new point is on the line between two points then insert it between
// those two points (desired behavior for curve and measure pointsets, which happens to not affect
// axes and scale pointsets)
public void AddPoint(NuGenPoint point)
{
// insert point between two other points if it lies on the line between the two points
const int LineEpsilonPixels = 2;
int index = 0;
double x = point.XScreen;
double y = point.YScreen;
NuGenPoint pOld = null;
foreach (NuGenPoint pNew in points)
{
double xNew = pNew.XScreen;
double yNew = pNew.YScreen;
if (pOld != null)
{
double xOld = pOld.XScreen;
double yOld = pOld.YScreen;
double xProj, yProj;
NuGenMath.ProjectPointOnToLine(x, y, xOld, yOld, xNew, yNew, out xProj, out yProj);
double diff = Math.Sqrt((x - xProj) * (x - xProj) + (y - yProj) * (y - yProj));
if (diff < LineEpsilonPixels)
{
points.Insert(index, point);
point.PointSet = this;
RemoveLine(pOld, pNew);
AddLine(pOld, point);
AddLine(point, pNew);
return;
}
}
pOld = pNew;
index++;
}
points.Add(point);
point.PointSet = this;
if (pOld != null)
{
AddLine(pOld, point);
}
}