// 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);
}
// copy constructor
public RectangleR(RectangleR r)
{
_x = r.X;
_y = r.Y;
_width = r.Width;
_height = r.Height;
}
public override bool Equals(object obj)
{
if (obj is RectangleR)
{
RectangleR r = (RectangleR)obj;
return(X == r.X && Y == r.Y && Width == r.Width && Height == r.Height);
}
return(false);
}
// scales the points so that the length of their shorter side
// matches the length of the shorter side of the given box.
// thus, both dimensions are warped proportionally, rather than
// independently, like in the function ScaleTo.
public static List <PointR> ScaleToMin(List <PointR> points, RectangleR box)
{
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 *= (box.MinSide / r.MinSide);
p.Y *= (box.MinSide / r.MinSide);
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);
}
// translates the points so that the upper-left corner of their bounding box lies at 'toPt'
public static List <PointR> TranslateBBoxTo(List <PointR> points, PointR toPt)
{
List <PointR> newPoints = new List <PointR>(points.Count);
RectangleR r = Utils.FindBox(points);
for (int i = 0; i < points.Count; i++)
{
PointR p = (PointR)points[i];
p.X += (toPt.X - r.X);
p.Y += (toPt.Y - r.Y);
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);
}
// determine if this gesture is 1D or 2D based on ratio of "oriented" (rotated to 0)
// bounding box compared to a threshold (determined empirically)
// Lisa 1/2/2008
public static bool Is1DGesture(List <PointR> rawPts) //, String name)
{
// make a copy of the pts
List <PointR> pts = new List <PointR>(rawPts);
// rotate points to 0 (temporarily!)
double radians = Utils.AngleInRadians(Utils.Centroid(pts), (PointR)pts[0], false);
pts = Utils.RotateByRadians(pts, -radians); // undo angle
// determine ratio of height to width to see which side is shorter
RectangleR r = Utils.FindBox(pts);
// check for divide by zero
if ((r.Width == 0) || (r.Height == 0))
{
return(true);
}
else if ((r.Width / r.Height) < (r.Height / r.Width)) // width is shorter side
{
if ((r.Width / r.Height) < 0.30)
{
return(true);
}
else
{
return(false);
}
}
else // else height is shorter side
{
if ((r.Height / r.Width) < 0.30)
{
return(true);
}
else
{
return(false);
}
}
}
// 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);
}