/**
* Calculate the feature area of the (x,y) points to the input line
*
* @param points
* points
* @param line
* line to find feature area to
* @return feature area from the (x,y) points to the input line
*/
public static double toLine(StylusPointCollection points, Line2D line)
{
double area = 0;
double b1, b2, d, h;
for (int i = 0; i < points.Count - 1; i++)
{
b1 = line.ptSegDist(points[i].X, points[i].Y);
b2 = line.ptSegDist(points[i + 1].X, points[i + 1]
.Y);
d = distance(points[i], points[i + 1]);
h = Math.Sqrt(Math.Abs(Math.Pow(d, 2)
- Math.Pow(Math.Abs(b1 - b2), 2)));
area += Math.Abs(0.5 * (b1 + b2) * h);
}
return(area);
}
/**
* Return the total least squares error between the array of points and the
* input line
*
* @param points
* points
* @param line
* line to find the LSE to
* @return total least squares error between the input points and line
*/
public static double error(StylusPointCollection points, Line2D line)
{
double err = 0.0;
double err2 = 0.0;
for (int i = 0; i < points.Count; i++)
{
err += line.ptSegDist(points[i].X, points[i].Y);
err2 += line.ptSegDist2(points[i].X, points[i].Y);
}
return(err);
}