public static GraphicsPathFP CreateSmoothCurves(PointFP[] points, int offset, int numberOfSegments, int ff_factor, bool closed)
{
int len = points.Length;
GraphicsPathFP path = new GraphicsPathFP();
if (numberOfSegments < 1 ||
numberOfSegments > points.Length - 1 ||
offset < 0 ||
offset + numberOfSegments > len - 1)
{
return(path);
}
PointFP[] PC1s = new PointFP[points.Length];
PointFP[] PC2s = new PointFP[points.Length];
if (!closed)
{
PC1s[0] = points[0];
PC2s[len - 1] = points[len - 1];
}
else
{
PC1s[0] = CalcControlPoint(points[len - 1], points[0], points[1], ff_factor);
PC2s[0] = CalcControlPoint(points[1], points[0], points[len - 1], ff_factor);
PC1s[len - 1] = CalcControlPoint(points[len - 2], points[len - 1], points[0], ff_factor);
PC2s[len - 1] = CalcControlPoint(points[0], points[len - 1], points[len - 2], ff_factor);
}
for (int i = 1; i < len - 1; i++)
{
PC1s[i] = CalcControlPoint(points[i - 1], points[i], points[i + 1], ff_factor);
PC2s[i] = CalcControlPoint(points[i + 1], points[i], points[i - 1], ff_factor);
}
path.AddMoveTo(points[offset]);
for (int i = 0; i < numberOfSegments; i++)
{
path.AddCurveTo(PC1s[offset + i], PC2s[offset + i + 1], points[offset + i + 1]);
}
if (closed)
{
path.AddCurveTo(PC1s[len - 1], PC2s[0], points[0]);
path.AddClose();
}
return(path);
}
public static GraphicsPathFP CreateArc(int ff_xmin, int ff_ymin, int ff_xmax, int ff_ymax, int ff_startangle, int ff_sweepangle, bool closed, bool standalone)
{
if (ff_sweepangle < 0)
{
ff_startangle += ff_sweepangle;
ff_sweepangle = -ff_sweepangle;
}
int segments = MathFP.Round(MathFP.Div(4 * MathFP.Abs(ff_sweepangle), MathFP.PI)) >> SingleFP.DecimalBits;
if (segments == 0)
{
segments = 1;
}
GraphicsPathFP path = new GraphicsPathFP();
int ff_darg = ff_sweepangle / segments;
int ff_arg = ff_startangle;
int ff_lastcos = MathFP.Cos(ff_startangle);
int ff_lastsin = MathFP.Sin(ff_startangle);
int ff_xc = (ff_xmin + ff_xmax) / 2;
int ff_yc = (ff_ymin + ff_ymax) / 2;
int ff_rx = (ff_xmax - ff_xmin) / 2;
int ff_ry = (ff_ymax - ff_ymin) / 2;
int ff_RXBETA = MathFP.Mul(17381, ff_rx);
int ff_RYBETA = MathFP.Mul(17381, ff_ry);
int ff_currcos, ff_currsin, ff_x1, ff_y1, ff_x2, ff_y2;
if (closed)
{
path.AddMoveTo(new PointFP(ff_xc, ff_yc));
}
for (int i = 1; i <= segments; i++)
{
ff_arg = i == segments?ff_startangle + ff_sweepangle:ff_arg + ff_darg;
ff_currcos = MathFP.Cos(ff_arg);
ff_currsin = MathFP.Sin(ff_arg);
ff_x1 = ff_xc + MathFP.Mul(ff_rx, ff_lastcos);
ff_y1 = ff_yc + MathFP.Mul(ff_ry, ff_lastsin);
ff_x2 = ff_xc + MathFP.Mul(ff_rx, ff_currcos);
ff_y2 = ff_yc + MathFP.Mul(ff_ry, ff_currsin);
if (i == 1)
{
if (closed)
{
path.AddLineTo(new PointFP(ff_x1, ff_y1));
}
else
if (standalone)
{
path.AddMoveTo(new PointFP(ff_x1, ff_y1));
}
}
path.AddCurveTo(
new PointFP(ff_x1 - MathFP.Mul(ff_RXBETA, ff_lastsin), ff_y1 + MathFP.Mul(ff_RYBETA, ff_lastcos)),
new PointFP(ff_x2 + MathFP.Mul(ff_RXBETA, ff_currsin), ff_y2 - MathFP.Mul(ff_RYBETA, ff_currcos)),
new PointFP(ff_x2, ff_y2));
ff_lastcos = ff_currcos;
ff_lastsin = ff_currsin;
}
if (closed)
{
path.AddClose();
}
return(path);
}
