PointF?GetNearestControlPoint(List <PointF> cpts, PointF point, float threshold, CompositionCanvasControl canvas)
{
bool found = false;
PointF nearest = Point.Empty;
float minSqDist = threshold * threshold;
foreach (var cpt in cpts)
{
PointF pt = canvas.PointToClient(new Point((int)cpt.X, (int)cpt.Y));
float dx = point.X - pt.X;
float dy = point.Y - pt.Y;
float sqDist = dx * dx + dy * dy;
if (minSqDist > sqDist)
{
nearest = cpt;
minSqDist = sqDist;
found = true;
}
}
if (found)
{
return(nearest);
}
else
{
return(null);
}
}
JointAnnotation GetNearestJoint(SkeletonAnnotation an, PointF point, float threshold, CompositionCanvasControl canvas)
{
JointAnnotation nearest = null;
float minSqDist = threshold * threshold;
foreach (var joint in an.joints)
{
PointF pt = canvas.PointToClient(new Point((int)joint.position.X, (int)joint.position.Y));
float dx = point.X - pt.X;
float dy = point.Y - pt.Y;
float sqDist = dx * dx + dy * dy;
if (minSqDist > sqDist)
{
nearest = joint;
minSqDist = sqDist;
}
}
return(nearest);
}