topic Re: Create Solid from boundingbox in Revit API Forum

Create Solid from boundingbox

Anonymous — Tue, 17 May 2016 14:15:31 GMT

Hello,

I have a boundingbox and i need to convert in to a solid;

one possible solution is to use CreateExtrusionGeometry using a curveloop from some lines created from this boundingbox,

is there a better solution to accomplish this?

Re: Create Solid from boundingbox

Anonymous — Tue, 17 May 2016 15:28:01 GMT

For now i used CreateExtrusionGeometry and its OK, but i would appreciate better solutions if any.

Re: Create Solid from boundingbox

jeremytammik — Wed, 18 May 2016 07:21:55 GMT

Do you want to generate a persistent Revit database element?

If so, the simplest solution is almost certainly to use a DirectShape element:

http://thebuildingcoder.typepad.com/blog/about-the-author.html#5.50

Cheers,

Jeremy

Re: Create Solid from boundingbox

Anonymous — Wed, 18 May 2016 07:48:46 GMT

Dear jeremy,

Thank you for your answer and helpful link.

Here, this solid is a temporary one to use with ElementIntersectsSolidFilter.

Since intersecting element is a brace , i couldn't use BoundingBoxIntersectsFilter;

if there were a gradient boundingboxxyz in Revit API that Could be of great use for elements such as braces;

regards.

Re: Create Solid from boundingbox

owenmerrick — Fri, 23 Sep 2016 01:24:16 GMT

Hi,

I was looking for an answer to the very same question, ended up here, and re-created your solution. To save the next person a bit of typing, here's my code. I'd love a more elegant answer but this works for my needs.

        public static Solid solidBoundingBox(Solid inputSolid)
        {
            BoundingBoxXYZ bbox = inputSolid.GetBoundingBox();

            // corners in BBox coords
            XYZ pt0 = new XYZ(bbox.Min.X, bbox.Min.Y, bbox.Min.Z);
            XYZ pt1 = new XYZ(bbox.Max.X, bbox.Min.Y, bbox.Min.Z);
            XYZ pt2 = new XYZ(bbox.Max.X, bbox.Max.Y, bbox.Min.Z);
            XYZ pt3 = new XYZ(bbox.Min.X, bbox.Max.Y, bbox.Min.Z);
            //edges in BBox coords
            Line edge0 = Line.CreateBound(pt0, pt1);
            Line edge1 = Line.CreateBound(pt1, pt2);
            Line edge2 = Line.CreateBound(pt2, pt3);
            Line edge3 = Line.CreateBound(pt3, pt0);
            //create loop, still in BBox coords
            List<Curve> edges = new List<Curve>();
            edges.Add(edge0);
            edges.Add(edge1);
            edges.Add(edge2);
            edges.Add(edge3);
            Double height = bbox.Max.Z - bbox.Min.Z;
            CurveLoop baseLoop = CurveLoop.Create(edges);
            List<CurveLoop> loopList = new List<CurveLoop>();
            loopList.Add(baseLoop);
            Solid preTransformBox = GeometryCreationUtilities.CreateExtrusionGeometry(loopList, XYZ.BasisZ, height);

            Solid transformBox = SolidUtils.CreateTransformed(preTransformBox, bbox.Transform);

            return transformBox;
            
        }

Re: Create Solid from boundingbox

jeremytammik — Fri, 23 Sep 2016 10:52:37 GMT

Dear Owen,

Thank you very much for your nice little sample code snippet.

I will gladly add it to The Building Coder samples, if I may.

Do you have a sample use case to demonstrate it doing something handy in a simple external command?

Thank you!

Cheers,

Jeremy

Re: Create Solid from boundingbox

owenmerrick — Fri, 23 Sep 2016 17:23:00 GMT

Upon selecting the planar face of a solid, two new solids are created - the two halves of the bounding box of the original, split by the plane of the selected face.

Hi Jeremy,

Here's a simplified version of how I'm using the bounding box code from yesterday. Whether this command meets the definition of "doing something handy" is debatable, but it's at least a functional command. I'm working on solid modeling tools for working with non-parametric masses using somewhat different formal logic than the built-in "form" tools. The step demo'd here is really just one piece of construction geometry on the way to a more complex, yet-unfinished tool, but it illustrates a few useful functions:

- from user face selection, retrieve both the face and the solid
- from solid, generate solid of bounding box
- insert solid into family context

This draws _very_ heavily on the sample code provided with the SDK, particularly the FreeFormElement sample and planar face selection filter.

For the sample code I copied the relevant bits into a fresh addin and zipped the whole thing up. This has the source, working(for me) .dll and sample image and rfa in the "doc" folder.

Best,

Owen

Re: Create Solid from boundingbox

Mustafa.Salaheldin — Sat, 24 Sep 2016 18:04:25 GMT

Can you please provide a sample RVT file for your "brace" family because I guess there is a direct way to do your intersection.

Re: Create Solid from boundingbox

BobbyC.Jones — Tue, 27 Sep 2016 19:40:24 GMT

Hi Jeremy,

As a use case, we use very similar code to do interference checking within a provided tolerance.

Owen,

I think you nailed it and I don't think there is a more elegant solution.

Re: Create Solid from boundingbox

jeremytammik — Fri, 30 Sep 2016 11:55:57 GMT

Wonderful, thank you ever so much for the perfect sample!

I summarised, polished and published this thread on The Building Coder:

http://thebuildingcoder.typepad.com/blog/2016/09/solid-from-bounding-box-and-forge-webinar-4.html#2

Cheers,

Jeremy

Re: Create Solid from boundingbox

owenmerrick — Fri, 30 Sep 2016 16:09:14 GMT

Jeremy,

Great, glad it worked out for you. If I get my alternative massing modeling tools working well perhaps I'll post a follow up.

Bobby,

Thanks for the kind words. I'm an architect rather than a proper programmer so sometimes I'm not sure if I'm missing an easier or more elegant way of doing things.

Best,

Owen

Re: Create Solid from boundingbox

516579196 — Tue, 26 Jul 2022 08:54:25 GMT

namespace SizeAdjustment

{
[Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
public class WindowDoorOpening : IExternalCommand
{

public Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData,
ref string message, ElementSet elements)
{

UIApplication uIApp = commandData.Application;
Application application = uIApp.Application;
UIDocument uIDoc = uIApp.ActiveUIDocument;
Document document = uIDoc.Document;
Selection selection = uIDoc.Selection;
View view = uIDoc.ActiveView;
//【】过滤墙体用户选择
IList<Element> faces = uIDoc.Selection.PickElementsByRectangle();

Transaction trans = new Transaction(document, "LS");
trans.Start();

var solid = solidBoundingBox(view, faces.First());
var ds7 = DirectShape.CreateElement(document, new ElementId(BuiltInCategory.OST_GenericModel));
ds7.GetGeneratingElementIds(solid);
ds7.SetShape(new List<GeometryObject>() { solid });
trans.Commit();

return Result.Succeeded;
}
public static Solid solidBoundingBox(View view,Element inputSolid)
{
BoundingBoxXYZ bbox = inputSolid.get_BoundingBox(view);

// corners in BBox coords
XYZ pt0 = new XYZ(bbox.Min.X, bbox.Min.Y, bbox.Min.Z);
XYZ pt1 = new XYZ(bbox.Max.X, bbox.Min.Y, bbox.Min.Z);
XYZ pt2 = new XYZ(bbox.Max.X, bbox.Max.Y, bbox.Min.Z);
XYZ pt3 = new XYZ(bbox.Min.X, bbox.Max.Y, bbox.Min.Z);
//edges in BBox coords
Line edge0 = Line.CreateBound(pt0, pt1);
Line edge1 = Line.CreateBound(pt1, pt2);
Line edge2 = Line.CreateBound(pt2, pt3);
Line edge3 = Line.CreateBound(pt3, pt0);
//create loop, still in BBox coords
List<Curve> edges = new List<Curve>();
edges.Add(edge0);
edges.Add(edge1);
edges.Add(edge2);
edges.Add(edge3);
Double height = bbox.Max.Z - bbox.Min.Z;
CurveLoop baseLoop = CurveLoop.Create(edges);
List<CurveLoop> loopList = new List<CurveLoop>();
loopList.Add(baseLoop);
Solid preTransformBox = GeometryCreationUtilities.CreateExtrusionGeometry(loopList, XYZ.BasisZ, height);

Solid transformBox = SolidUtils.CreateTransformed(preTransformBox, bbox.Transform);

return transformBox;

}
}
}