unsafe public void Analysis(VPointCollection pts)
{
_lines.Clear();
if (pts == null || pts.Count == 0)
{
return;
}
//analysis values
float min = pts.GetMinValue();
float max = pts.GetMaxValue();
if (min == max)
{
Interval = 1;
}
if (Interval == 0)
{
Interval = 1;
}
if ((min < max && Interval < 0) || (min > max && Interval > 0))
{
Interval = -Interval;
}
min = GetNearestValue(min, Interval, false);
max = GetNearestValue(max, Interval, true);
float cur = min;
List <float> analysis_values = new List <float>();
while (cur <= max)
{
analysis_values.Add(cur);
cur += Interval;
}
float[] x_array, y_array, v_array, analysis_array = null;
pts.Split(out x_array, out y_array, out v_array);
float *result = null;
try
{
result = SanJiao(x_array, y_array, v_array, analysis_array, pts.Count, 1, min, Interval, 2);
if (result == null)
{
return;
}
int analysis_value_count = (int)result[0];
int index = 1;
if (analysis_value_count <= 0)
{
return;
}
for (; index <= analysis_value_count;)
{
int point_count = (int)result[index++];
float analysis_value = result[index++];
LineString line = new LineString(analysis_value);
for (int i = 0; i < point_count; i++)
{
float x = result[index++];
float y = result[index++];
if (y <= Helper.InvalidData)
{
line.AddPoint(new System.Drawing.PointF(x, y));
}
}
if (line.Points.Count > 0)
{
line.AddVPoint(line.Points[0]);
}
_lines.Add(line);
}
}
catch (Exception ex)
{
}
finally
{
if (result != null)
{
freecPointer(result);
}
}
}