public void Arc_Tilted()
{
var p1 = Point.ByCoordinates(4.3957, 7.96146, 0);
var p2 = Point.ByCoordinates(6.49355, 5.98396, 2.28352);
var p3 = Point.ByCoordinates(7.11897, 2.70101, 3.81878);
var arc = Arc.ByThreePoints(p1, p2, p3);
var revitCurve = arc.ToRevitType(false);
Assert.NotNull(revitCurve);
Assert.IsAssignableFrom <Autodesk.Revit.DB.Arc>(revitCurve);
var revitArc = (Autodesk.Revit.DB.Arc)revitCurve;
revitArc.Center.X.ShouldBeApproximately(2, 0.0001);
revitArc.Center.Y.ShouldBeApproximately(2, 0.0001);
revitArc.Center.Z.ShouldBeApproximately(0, 0.0001);
arc.CenterPoint.ShouldBeApproximately(revitArc.Center.ToPoint(false));
arc.Radius.ShouldBeApproximately(revitArc.Radius);
Math.Abs(arc.Normal.Dot(revitArc.Normal.ToVector())).ShouldBeApproximately(1);
}
public static Arc GetAsArc(this Curve curve)
{
if (curve.IsClosed)
{
throw new ArgumentException("Curve is closed, cannot be an Arc");
}
using (Point midPoint = curve.PointAtParameter(0.5))
{
return(Arc.ByThreePoints(curve.StartPoint, midPoint, curve.EndPoint));
}
}
public static bool IsArc(this Curve curve)
{
if (curve.IsClosed)
{
return(false);
}
using (Point midPoint = curve.PointAtParameter(0.5))
using (Arc arc = Arc.ByThreePoints(curve.StartPoint, midPoint, curve.EndPoint))
{
return(Threshold(arc.Length, curve.Length));
}
}
public static Surface SetupArcLoft()
{
var pt1 = Point.ByCoordinates(0, 0, 4);
var pt2 = Point.ByCoordinates(1, 1, 4);
var pt3 = Point.ByCoordinates(0, 4, 4);
var pt4 = Point.ByCoordinates(0, 0, 0);
var pt5 = Point.ByCoordinates(2, 2, 0);
var pt6 = Point.ByCoordinates(0, 4, 0);
var top = Arc.ByThreePoints(pt1, pt2, pt3);
var bottom = Arc.ByThreePoints(pt4, pt5, pt6);
var surface = Surface.ByLoft(new List <Curve>()
{
top, bottom
});
return(surface);
}
public static Surface SetupArcCurveSweep()
{
var pt1 = Point.ByCoordinates(0, 0, 0);
var pt2 = Point.ByCoordinates(0, 0, 5);
var pt3 = Point.ByCoordinates(10, 0, 0);
var pt4 = Point.ByCoordinates(-5, 5, 0);
var pt5 = Point.ByCoordinates(0, 10, 0);
var pt6 = Point.ByCoordinates(5, 10, 10);
var pt7 = Point.ByCoordinates(15, 15, 0);
var rail1 = Arc.ByThreePoints(pt5, pt6, pt7);
var rail2 = Arc.ByThreePoints(pt1, pt2, pt3);
var profile = Arc.ByThreePoints(pt1, pt4, pt5);
var surface = Surface.BySweep2Rails(rail1, rail2, profile);
return(surface);
}
private Curve CreateCurve(TwoCurves compareTo, Point A, Point B, double parameter, Point refpoint)
{
// Init an empty curve
Curve returnValue = null;
// If the boundaries to compare this curve to are arcs
// create a middle line between the boundaries
if (compareTo.Curve1.IsArc() || compareTo.Curve2.IsArc())
{
Line line = Line.ByStartPointEndPoint(compareTo.Curve1.PointAtParameter(0.5), compareTo.Curve2.PointAtParameter(0.5));
// If the reference point is on curve 2 invert the parameter
if (compareTo.Curve1.ClosestPointTo(refpoint).DistanceTo(refpoint) > 0)
{
parameter = 1 - parameter;
}
try
{
// try to create an arc by three points
returnValue = Arc.ByThreePoints(A, line.PointAtParameter(parameter), B);
}
catch (System.ApplicationException)
{
// On error create a line from A to B
returnValue = Line.ByStartPointEndPoint(A, B);
}
}
else
{
// If the boundaries are lines, create a line from A to B
returnValue = Line.ByStartPointEndPoint(A, B);
}
return(returnValue);
}
