/// <summary>
/// Draws an ovoid: a closed Catmull-Rom spline.
/// </summary>
/// <param name="pts">Control Points</param>
/// <param name="fillStr">Fill color</param>
/// <param name="outlineStr">Outline color</param>
public void DrawOvoid(String fillStr, String outlineStr, Path pts )
{
int numPts = pts.Count();
Path final = new Path();
for (int i = 0; i < numPts; i++)
{
Point2D P0 = pts[(i - 1 + numPts) % numPts];
Point2D P1 = pts[i];
Point2D P2 = pts[(i + 1) % numPts];
Point2D P3 = pts[(i + 2) % numPts];
for (int j = 0; j < resolution; j++)
{
double t = (double)j / resolution;
final.AddPt( 0.5 * ((2.0 * P1) +
(-P0 + P2) * t +
(2 * P0 - 5 * P1 + 4 * P2 - P3) * t * t +
(-P0 + 3 * P1 - 3 * P2 + P3) * t * t * t) );
}
}
DrawPoly(fillStr, outlineStr, final);
}
/// <summary>
/// Draws a polygon
/// </summary>
/// <param name="vertices">Vertices</param>
/// <param name="fillStr">Fill color</param>
/// <param name="outlineStr">Outline color</param>
public void DrawPoly(String fillStr, String outlineStr, Path pts )
{
StartDrawingObject();
//output path
for (int i = 0; i < pts.Count(); i++)
{
m_sw.Write( "\t" + pts[i].X + " " + pts[i].Y + " " );
m_sw.WriteLine( i==0 ? "moveto" : "lineto" );
}
EndDrawingObject(fillStr, outlineStr);
}