topic Re: Why my code won't work in .NET Forum

Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 02:29:57 GMT

I want to paint 2 color alternate on every face of a solid3d object, im using Solid3d.SetSubentityMaterial method the code have no error but it won't work can anyone have me. Im using C#.net framework 4.8 at visual studio 2022. Here the code

public class Solid3dMaterialExample { [CommandMethod("SetTwoColorsToSolid3dFaces")] public void SetTwoColorsToSolid3dFaces() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; using (Transaction tr = db.TransactionManager.StartTransaction()) { // Select Solid3d object PromptEntityOptions peo = new PromptEntityOptions("\nSelect a Solid3d:"); peo.SetRejectMessage("\nObject must be a Solid3d."); peo.AddAllowedClass(typeof(Solid3d), true); PromptEntityResult per = ed.GetEntity(peo); if (per.Status != PromptStatus.OK) { ed.WriteMessage("\nNo valid Solid3d selected."); return; } Solid3d solid3d = tr.GetObject(per.ObjectId, OpenMode.ForWrite) as Solid3d; if (solid3d == null) { ed.WriteMessage("\nFailed to access Solid3d."); return; } // Create two materials with different colors ObjectId materialId1 = CreateMaterial(tr, db, "Material1", Color.FromColorIndex(ColorMethod.ByAci, 1)); // Red ObjectId materialId2 = CreateMaterial(tr, db, "Material2", Color.FromColorIndex(ColorMethod.ByAci, 3)); // Blue // Check and apply alternating materials to the faces try { using (Brep brep = new Brep(solid3d)) { int faceIndex = 0; foreach (Autodesk.AutoCAD.BoundaryRepresentation.Face face in brep.Faces) { try { SubentityId faceId = face.SubentityPath.SubentId; if (faceId.Type == SubentityType.Face) // Check the type of Subentity { // Apply alternating materials ObjectId materialToApply = (faceIndex % 2 == 0) ? materialId1 : materialId2; solid3d.SetSubentityMaterial(faceId, materialToApply); ed.WriteMessage($"\nMaterial applied to face {faceIndex}."); faceIndex++; } } catch (System.Exception ex) { ed.WriteMessage($"\nError applying material to face: {ex.Message}"); } } } } catch (System.Exception ex) { ed.WriteMessage($"\nError processing Brep: {ex.Message}"); } tr.Commit(); } } private ObjectId CreateMaterial(Transaction tr, Database db, string materialName, Color color) { // Create a new material Material material = new Material { Name = materialName }; // Add the material to the MaterialDictionary DBDictionary materialDict = (DBDictionary)tr.GetObject(db.MaterialDictionaryId, OpenMode.ForWrite); ObjectId materialId = materialDict.SetAt(materialName, material); tr.AddNewlyCreatedDBObject(material, true); return materialId; } }

Re: Why my code won't work

kerry_w_brown — Mon, 09 Dec 2024 02:55:09 GMT

Is the code hitting this line ??

ed.WriteMessage($"\nMaterial applied to face {faceIndex}.");

Re: Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 03:04:00 GMT

i dubugging it and this line appear:
Autodesk.AutoCAD.BoundaryRepresentation.Exception: 'Exception of type 'Autodesk.AutoCAD.BoundaryRepresentation.Exception' was thrown.'
i hope i can print 2 color alternate on every face of a solid3d object but won't

Re: Why my code won't work

kerry_w_brown — Mon, 09 Dec 2024 03:08:05 GMT

On what line was the error reported ?

What was the actual error ?

How complex was the solid you are testing with ?

Any other information you can think of that may help resolve the issue ?

Re: Why my code won't work

kerry_w_brown — Mon, 09 Dec 2024 03:29:43 GMT

This looks suspect. Are you sure this block of code is correct ?

        // Create a new material
        Material material = new Material
        {
            Name = materialName
        };

How much help did you get from an AI source ?

Re: Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 03:28:25 GMT

sorry for my deficiency,
I use ai on private ObjectId CreateMaterial class

i do not check that code you sent thoroughly
when i debug, this happen

this happen when i chose a solid3d object
and this is the testing solid(it quite complex)

and finally im changing it from using Solid3d.SetSubentityColor method to using Solid3d.SetSubentityMaterial method

Re: Why my code won't work

kerry_w_brown — Mon, 09 Dec 2024 03:43:37 GMT

I'd close that drawing . . . it looks like about 30 solid components.

Do your initial development on a simple solid ( or perhaps one of the bracing plate components )

You are currently catching System Exceptions. Perhaps change that to

Autodesk.AutoCAD.BoundaryRepresentation.Exception

Re: Why my code won't work

_gile — Mon, 09 Dec 2024 08:13:45 GMT

Hi,

As I replied you in another thread, you need to use the Brep constructor which takes a FullSubentityPath as argument to be able to access to the Solid3d Subentities (Faces here).

Re: Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 08:23:28 GMT

im doing it, but i thinks my FullSubentityPath wrong and i am trying to fix it, thanks again for your advice

Re: Why my code won't work

_gile — Mon, 09 Dec 2024 08:40:35 GMT

@dinhthit25 a écrit :

im doing it, but i thinks my FullSubentityPath wrong and i am trying to fix it, thanks again for your advice

You're not doing it in the code you posted in the thread:

using (Brep brep = new Brep(solid3d))

I showed you how to do it here.

Re: Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 08:42:34 GMT

thanks you i will watch it agains

Re: Why my code won't work

dinhthit25 — Mon, 09 Dec 2024 09:43:36 GMT

Thanks you, now i can put both color in 1 solid3d object