private void Reset()
{
_time = 0.1f;
_points = null;
Random random = new Random((int)DateTime.Now.TimeOfDay.Ticks);
_baseHue = (float)random.NextDouble();
Invalidate();
}
public override List <Coordinate> ToCommonCoordinates(bool includeEndPoint)
{
// create a coordinate array containing the from-point, all the control points, and the to-point
Coordinate[] c = new Coordinate[ControlPointArray.Length + 2];
PointN p = FromPoint as PointN;
c[0] = new Coordinate(p.X, p.Y);
ControlPointArray.Cast <PointN>().Select(o => o.ToCoordinate()).ToArray().CopyTo(c, 1);
p = ToPoint as PointN;
c[c.Length - 1] = new Coordinate(p.X, p.Y);
// determine the number of points to interpolate
int interpolateCount = 0;
for (int i = 1; i < c.Length - 1; ++i)
{
double ax = c[i - 1].X - c[i].X;
double ay = c[i - 1].Y - c[i].Y;
double bx = c[i + 1].X - c[i].X;
double by = c[i + 1].Y - c[i].Y;
double dot = ax * bx + ay * by;
double ad = Math.Sqrt(ax * ax + ay * ay);
double bd = Math.Sqrt(bx * bx + by * by);
double angle = Math.PI - Math.Abs(Math.Acos(dot / (ad * bd)));
interpolateCount += Convert.ToInt32(Math.Floor(angle / SweepAngle));
}
// add the from-point to the output coordinates
List <Coordinate> coords = new List <Coordinate>();
coords.Add(c[0]);
// add interpolated points along the Bezier curve to the output coordinates
for (int i = 1; i < interpolateCount; ++i)
{
coords.Add(Interpolate(c, (double)i / interpolateCount));
}
// add the to-point to the output coordinates
if (includeEndPoint)
{
coords.Add(c[c.Length - 1]);
}
return(coords);
}
private Task <List <Tuple <Geometry, Color> > > CreateGeometries(float time)
{
return(Task.Run(() =>
{
ControlPointArray temp = Points;
int count = Points.Count;
List <Tuple <Geometry, Color> > geometries = new List <Tuple <Geometry, Color> >();
for (int index = 0; index < count - 1; ++index)
{
float hue = (_baseHue + (index + 1) / (float)(count + 1)) % 1;
Vector4 hsv = new Vector4(hue, 1.0f, 1f, 1);
Color rgba = XMath.ColorHsvToRgb(hsv);
ControlPointArray array = temp.Reduce(time);
geometries.Add(new Tuple <Geometry, Color>(array.CreateGeometry(_factory), rgba));
temp = array;
}
return geometries;
}));
}