Arc2d Get_arc(int i) { Arc a = (i == 0) ? arc1 : arc2; double start_deg = a.AngleStartR * math.MathUtil.Rad2Deg; double end_deg = a.AngleEndR * math.MathUtil.Rad2Deg; if (a.PositiveRotation == true) { double tmp = start_deg; start_deg = end_deg; end_deg = tmp; } Arc2d arc = new Arc2d(a.Center, a.Radius, start_deg, end_deg); // [RMS] code above does not preserve CW/CCW of arcs. // It would be better to fix that. But for now, just check if // we preserved start and end points, and if not reverse curves. if (i == 0 && arc.SampleT(0.0).DistanceSquared(Point1) > math.MathUtil.ZeroTolerance) { arc.Reverse(); } if (i == 1 && arc.SampleT(1.0).DistanceSquared(Point2) > math.MathUtil.ZeroTolerance) { arc.Reverse(); } return(arc); }
public static void test_svg() { Polygon2d poly = Polygon2d.MakeCircle(100.0f, 10); PolyLine2d pline = new PolyLine2d(); pline.AppendVertex(Vector2d.Zero); pline.AppendVertex(200 * Vector2d.AxisX); pline.AppendVertex(200 * Vector2d.One); Circle2d circ = new Circle2d(33 * Vector2d.One, 25); Segment2d seg = new Segment2d(Vector2d.Zero, -50 * Vector2d.AxisY); SVGWriter writer = new SVGWriter(); writer.AddPolygon(poly, SVGWriter.Style.Filled("lime", "black", 0.25f)); writer.AddPolyline(pline, SVGWriter.Style.Outline("orange", 2.0f)); writer.AddCircle(circ, SVGWriter.Style.Filled("yellow", "red", 5.0f)); writer.AddLine(seg, SVGWriter.Style.Outline("blue", 10.0f)); int astep = 29; Vector2d c = new Vector2d(-200, 100); for (int k = 1; k <= 12; ++k) { Arc2d arc = new Arc2d(c + k * 45 * Vector2d.AxisX, 20, 0, k * astep); writer.AddArc(arc); writer.AddBox(arc.Bounds, SVGWriter.Style.Outline("red", 0.5f)); } c.y += 50; for (int k = 1; k <= 12; ++k) { Arc2d arc = new Arc2d(c + k * 45 * Vector2d.AxisX, 20, k * astep, (k + 5) * astep); writer.AddArc(arc); writer.AddBox(arc.Bounds, SVGWriter.Style.Outline("red", 0.5f)); } c.y += 50; for (int k = 1; k <= 12; ++k) { Arc2d arc = new Arc2d(c + k * 45 * Vector2d.AxisX, 20, k * astep, (k + 10) * astep); writer.AddArc(arc); writer.AddBox(arc.Bounds, SVGWriter.Style.Outline("red", 0.5f)); } c.y += 50; for (int k = 1; k <= 12; ++k) { Arc2d arc = new Arc2d(c + k * 45 * Vector2d.AxisX, 20, k * astep, (k + 10) * astep); arc.Reverse(); writer.AddArc(arc); writer.AddBox(arc.Bounds, SVGWriter.Style.Outline("red", 0.5f)); } writer.Write(TestUtil.GetTestOutputPath("test.svg")); }