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); }