public static void WritePolylines(this PathWriter pw, IVector2dProvider points)
{
int count = points.CoordCount;
if (count > 1)
{
points.GetCoord(0, out double x, out double y);
pw.MoveTo(x, y);
for (int i = 1; i < count; ++i)
{
points.GetCoord(i, out x, out y);
pw.LineTo(x, y);
}
}
}
//-----------------------------------------------------------------------------------------
public static void WriteSmoothCurve3(this PathWriter pw, IVector2dProvider points, bool closedShape)
{
int coordCount = points.CoordCount;
switch (coordCount)
{
case 0:
case 1: return;
case 2:
{
points.GetCoord(0, out double x, out double y);
pw.MoveTo(x, y);
points.GetCoord(1, out x, out y);
pw.LineTo(x, y);
}
break;
case 3:
{
points.GetCoord(0, out double x0, out double y0);
points.GetCoord(1, out double x1, out double y1);
points.GetCoord(2, out double x2, out double y2);
pw.MoveTo(x0, y0);
pw.Curve3(x1, y1, x2, y2);
if (closedShape)
{
pw.SmoothCurve3(x0, y0);
}
}
break;
default:
{
points.GetCoord(0, out double x0, out double y0);
points.GetCoord(1, out double x1, out double y1);
points.GetCoord(2, out double x2, out double y2);
pw.MoveTo(x0, y0);
pw.Curve3(x1, y1, x2, y2);
for (int i = 3; i < coordCount; ++i)
{
points.GetCoord(i, out double x, out double y);
pw.SmoothCurve3(x, y);
}
if (closedShape)
{
pw.SmoothCurve3(x0, y0);
}
}
break;
}
}
public static void WriteSmoothCurve4(this PathWriter pw, IVector2dProvider points, bool closedShape)
{
int coordCount = points.CoordCount;
switch (coordCount)
{
case 0:
case 1: return;
case 2:
{
points.GetCoord(0, out double x, out double y);
pw.MoveTo(x, y);
points.GetCoord(1, out x, out y);
pw.LineTo(x, y);
}
break;
case 3:
{
points.GetCoord(0, out double x0, out double y0);
points.GetCoord(1, out double x1, out double y1);
points.GetCoord(2, out double x2, out double y2);
pw.MoveTo(x0, y0);
pw.Curve3(x1, y1, x2, y2); //***, we have 3 points, so we use Curve3
if (closedShape)
{
pw.SmoothCurve3(x0, y0);
}
}
break;
default:
{
points.GetCoord(0, out double x0, out double y0);
points.GetCoord(1, out double x1, out double y1);
points.GetCoord(2, out double x2, out double y2);
points.GetCoord(3, out double x3, out double y3);
pw.MoveTo(x0, y0);
pw.Curve4(x1, y1, x2, y2, x3, y3);
for (int i = 4; i < coordCount - 1;)
{
points.GetCoord(i, out x2, out y2);
points.GetCoord(i + 1, out x3, out y3);
pw.SmoothCurve4(x2, y2, x3, y3);
i += 2;
}
if (closedShape)
{
pw.SmoothCurve4(x3, y3, x0, y0);
}
}
break;
}
}