// scales the points so that they form the size given. does not restore the
// origin of the box.
// adapted from ScaleTo() to smartly handle 1D scaling -- ie, if a gesture is 1D,
// scale to the longer dimension only, or we warp our gestures too much
// Lisa 12/28/2007
public static List <PointR> ScaleTo1D(List <PointR> points, SizeR sz)
{
List <PointR> newPoints = new List <PointR>(points.Count);
RectangleR r = FindBox(points);
// scale both by same factor
double scaleFactor = 0.0;
if (r.Width > r.Height)
{
scaleFactor = r.Width;
}
else
{
scaleFactor = r.Height;
}
for (int i = 0; i < points.Count; i++)
{
PointR p = (PointR)points[i];
if (r.Width != 0d)
{
p.X *= (sz.Width / scaleFactor);
}
if (r.Height != 0d)
{
p.Y *= (sz.Height / scaleFactor);
}
newPoints.Add(p);
}
return(newPoints);
}
// new scaling methods rewritten by Lisa as of 8/9/2009 from input from Jake
public static List <PointR> Scale(List <PointR> pts, double oneDRatio, SizeR size) // scales the oriented bbox based on 1D or 2D
{
if (NDollarParameters.Instance.UseUniformScaling) // scale to a uniform circle
{
// do new thing
PointR centroid = Utils.Centroid(pts);
double radiusSquared = 1.0d;
foreach (PointR point in pts)
{
double distanceSquared = Math.Pow((centroid.X - point.X), 2.0) + Math.Pow((centroid.Y - point.Y), 2.0);
if (distanceSquared > radiusSquared)
{
radiusSquared = distanceSquared;
}
}
double factor = size.Width / Math.Sqrt(radiusSquared); //Assume that size is a square and arbitrarily select width
//this could also be replaced with a constant value (250?)
List <PointR> scaledPts = new List <PointR>();
for (int i = 0; i < pts.Count; i++)
{
PointR p = new PointR((PointR)pts[i]);
p.X *= factor;
p.Y *= factor;
scaledPts.Add(p);
}
return(scaledPts);
}
else // do old thing
{
return(Utils.ScaleByDimension(pts, oneDRatio, size));
}
}
// translates the points by the given delta amounts
public static List <PointR> TranslateBy(List <PointR> points, SizeR sz)
{
List <PointR> newPoints = new List <PointR>(points.Count);
for (int i = 0; i < points.Count; i++)
{
PointR p = (PointR)points[i];
p.X += sz.Width;
p.Y += sz.Height;
newPoints.Add(p);
}
return(newPoints);
}
// scales by the percentages contained in the 'sz' parameter. values of 1.0 would result in the
// identity scale (that is, no change).
public static List <PointR> ScaleBy(List <PointR> points, SizeR sz)
{
List <PointR> newPoints = new List <PointR>(points.Count);
RectangleR r = FindBox(points);
for (int i = 0; i < points.Count; i++)
{
PointR p = (PointR)points[i];
p.X *= sz.Width;
p.Y *= sz.Height;
newPoints.Add(p);
}
return(newPoints);
}
// scales the points so that they form the size given. does not restore the
// origin of the box.
public static List <PointR> ScaleTo(List <PointR> points, SizeR sz)
{
List <PointR> newPoints = new List <PointR>(points.Count);
RectangleR r = FindBox(points);
for (int i = 0; i < points.Count; i++)
{
PointR p = (PointR)points[i];
if (r.Width != 0d)
{
p.X *= (sz.Width / r.Width);
}
if (r.Height != 0d)
{
p.Y *= (sz.Height / r.Height);
}
newPoints.Add(p);
}
return(newPoints);
}
public static List <PointR> ScaleByDimension(List <PointR> points, double oneDRatio, SizeR size) // scales properly based on 1D or 2D
{
RectangleR B = FindBox(points);
bool uniformly = false; // Lisa 8/16/2009; if we're not testing for 1D (i.e., when emulating $1), never scale uniformly
if (NDollarParameters.Instance.TestFor1D)
{
uniformly = (Math.Min(B.Width / B.Height, B.Height / B.Width) <= oneDRatio); // 1D or 2D gesture test
}
List <PointR> newpoints = new List <PointR>(points.Count);
for (int i = 0; i < points.Count; i++)
{
double qx = uniformly ? ((PointR)points[i]).X * (size.Width / Math.Max(B.Width, B.Height)) : ((PointR)points[i]).X * (size.Width / B.Width);
double qy = uniformly ? ((PointR)points[i]).Y * (size.Height / Math.Max(B.Width, B.Height)) : ((PointR)points[i]).Y * (size.Height / B.Height);
newpoints.Add(new PointR(qx, qy));
}
return(newpoints);
}