/// <summary>
/// Sets a new spline vertex
/// </summary>
/// <param name="X">X-coordinate</param>
/// <param name="Y">Y-coordinate</param>
/// <returns>Dynamic spline curve</returns>
public PathSpline SetSplineVertex(float X, float Y)
{
if (this.path is null)
{
this.Set(X, Y);
return(null);
}
else
{
if (this.currentSpline is null)
{
this.currentSpline = new PathSpline(this.x, this.y);
}
this.currentSpline.Add(X, Y);
this.drawingSpline = true;
if (X != this.x || Y != this.y)
{
this.xPrev = this.x;
this.x = X;
this.yPrev = this.y;
this.y = Y;
this.angle = null;
this.pathDef?.IncludePoint(X, Y);
}
return(this.currentSpline);
}
}
/// <summary>
/// Closes an ongoing spline curve (if one open).
/// </summary>
public void FlushSpline()
{
if (this.drawingSpline)
{
this.drawingSpline = false;
Spline.CreateSpline(this.path, this.currentSpline.ToArray());
this.currentSpline = null;
this.nonSpline = false;
}
}
/// <summary>
/// Closes the current contour, using a spline, creating a closed smooth loop.
/// </summary>
public void CloseLoop()
{
if (this.drawingSpline)
{
if (this.nonSpline)
{
this.AddSplineVertex(this.x0, this.y0);
this.FlushSpline();
this.path?.Close();
this.nonSpline = false;
}
else
{
Loop.CreateLoop(this.path, this.currentSpline.ToArray());
this.currentSpline = null;
}
this.drawingSpline = false;
}
else
{
this.CloseLine();
}
}