How to get width and Height of curveloop

[Anonymous]

How to calculate height and width of cuveloop as shown below?

[jeremytammik · Accepted solution]

One easy way to get a pretty good approximate value would be to tessellate the curve and determine the minimum and maximum resulting vertex coordinates:

https://apidocs.co/apps/revit/2019/f95f3199-3251-c708-c5a3-a0e9ef95ecfa.htm

[Anonymous]

Hi jeremytammik

It works for me.

Thank you

List<XYZ> lstPts = new List<XYZ>();
foreach (Curve cv in cl)
{
lstPts.AddRange(cv.Tessellate());
}

List<XYZ> tmp = lstPts.OrderBy(x => x.Z).ToList();

List<XYZ> tmp1 = lstPts.OrderBy(x => x.X).ToList();

double height = Math.Abs(tmp[0].Z - tmp[tmp.Count - 1].Z);
double width = Math.Abs(tmp1[0].X - tmp1[tmp1.Count - 1].X);

[jeremytammik · Accepted solution]

Thank you for confirming and sharing!

I decided to add something similar to The Building Coder samples for future reference.

To make it more generic, I implemented an extension method ExpandToContain( IEnumerable<XYZ> ) on the bounding box, and use it like this:

    public static BoundingBoxXYZ GetBoundingBox(
      CurveLoop curveLoop )
    {
      List<XYZ> pts = new List<XYZ>();
      foreach( Curve c in curveLoop )
      {
        pts.AddRange( c.Tessellate() );
      }

      BoundingBoxXYZ bb = new BoundingBoxXYZ();
      bb.Clear();
      bb.ExpandToContain( pts );
      return bb;
    }

Can you confirm that this works for you as well?

Thank you!

Here are the entire diffs (unfortunately including lots of superfluous whitespace modifications):

https://github.com/jeremytammik/the_building_coder_samples/compare/2019.0.145.12...2019.0.145.13

Cheers,

Jeremy

[Anonymous]

Hi jeremytammik,

I tried your code in my project.

It is working without any error and returns expected result.

Thank you.