/// <summary>
/// Parses one or more arc commands in the format rx ry ang, large-flag, sweep-flag endx endy.
/// </summary>
/// <param name="path"></param>
/// <param name="cmd"></param>
/// <param name="absolute"></param>
/// <param name="args"></param>
/// <remarks>
/// The arc is a segment along an ellipse that has 2 radii with the arc
/// extending from the current cursor position to the end point.
///
/// rx = Radius X of the constructed ellipse
/// ry = Radius Y of the constructed ellipse
/// ang = The rotational angle in degrees of the constructed ellipse
/// large-flag = 1 to use the longest path around the ellipse, 0 to use the shortest path
/// sweep-flag = 1 to sweep in a positive direction, 0 to sweep in a negative direction.
/// endx = The X co-ordinate of the end point of the arc
/// endy = The Y co-ordinate of the end point of the arc
/// </remarks>
private void ParseSVGArcCommand(PDFGraphicsPath path, char cmd, bool absolute, string[] args)
{
PDFUnit rx, ry, endx, endy;
double ang;
bool large, sweep;
int index = 0;
while (index < args.Length)
{
if (index == 0 || !string.IsNullOrEmpty(args[index]))
{
if (!AssertParseUnit(args, ref index, cmd, out rx))
{
return;
}
if (!AssertParseUnit(args, ref index, cmd, out ry))
{
return;
}
if (!AssertParseDouble(args, ref index, cmd, out ang))
{
return;
}
if (!AssertParseBoolInt(args, ref index, cmd, out large))
{
return;
}
if (!AssertParseBoolInt(args, ref index, cmd, out sweep))
{
return;
}
if (!AssertParseUnit(args, ref index, cmd, out endx))
{
return;
}
if (!AssertParseUnit(args, ref index, cmd, out endy))
{
return;
}
if (absolute)
{
path.ArcTo(rx, ry, ang, large ? PathArcSize.Large : PathArcSize.Small, sweep ? PathArcSweep.Positive : PathArcSweep.Negative, new PDFPoint(endx, endy));
}
else
{
path.ArcFor(rx, ry, ang, large ? PathArcSize.Large : PathArcSize.Small, sweep ? PathArcSweep.Positive : PathArcSweep.Negative, new PDFPoint(endx, endy));
}
}
else if (string.IsNullOrEmpty(args[index]))
{
index++;
}
}
}
