Texture mapping on a surface using c#

mayur_kapadnis — Mon, 02 Dec 2024 13:03:54 GMT

I have a surface in autocad, i have an image, i want to map that image on that surface, like we do it using RMAT command, how can I do it using c#?

Re: Texture mapping on a surface using c#

M_Kocyigit — Mon, 02 Dec 2024 15:15:59 GMT

Hi @mayur_kapadnis ,

try it with the following code

using Autodesk.AutoCAD.ApplicationServices; using Autodesk.AutoCAD.DatabaseServices; using Autodesk.AutoCAD.EditorInput; using Autodesk.AutoCAD.Geometry; using Autodesk.AutoCAD.Runtime; [assembly: CommandClass(typeof(TextureMappingExample))] public class TextureMappingExample { [CommandMethod("MapTexture")] public void MapTexture() { // Get the active document and database Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; using (Transaction tr = db.TransactionManager.StartTransaction()) { // Select a surface PromptEntityOptions peo = new PromptEntityOptions("\nSelect a surface: "); peo.SetRejectMessage("\nOnly surfaces are allowed."); peo.AddAllowedClass(typeof(Surface), true); PromptEntityResult per = doc.Editor.GetEntity(peo); if (per.Status != PromptStatus.OK) return; // Open the surface for write ObjectId surfaceId = per.ObjectId; Surface surface = tr.GetObject(surfaceId, OpenMode.ForWrite) as Surface; if (surface == null) { doc.Editor.WriteMessage("\nSelected entity is not a surface."); return; } // Add a material with texture ObjectId materialId = AddMaterialWithTexture(db, tr, "MyTextureMaterial", "path_to_your_image.jpg"); // Apply the material to the surface if (!materialId.IsNull) { surface.MaterialId = materialId; surface.MaterialMapper.MaterialTransform = Matrix3d.Identity; } tr.Commit(); } } private ObjectId AddMaterialWithTexture(Database db, Transaction tr, string materialName, string imagePath) { // Get the material dictionary ObjectId materialDictId = db.MaterialDictionaryId; DBDictionary materialDict = tr.GetObject(materialDictId, OpenMode.ForWrite) as DBDictionary; // Check if material already exists if (materialDict.Contains(materialName)) { return materialDict.GetAt(materialName); } // Create a new material Material material = new Material { Name = materialName, DiffuseMap = new MaterialMap { Source = FileMaterialSource.File, Filename = imagePath } }; // Add the material to the dictionary ObjectId materialId = materialDict.SetAt(materialName, material); tr.AddNewlyCreatedDBObject(material, true); return materialId; } }

Furthermore, there is an extensive code from Pavliukas, which was made available in 2007. Many thanks for that.
https://forum.dwg.ru/showthread.php?t=15000&highlight=%EC%E0%F2%E5%F0%E8%E0%EB&pp=10000

Re: Texture mapping on a surface using c#

mayur_kapadnis — Tue, 03 Dec 2024 04:21:30 GMT

getting these errors:

'Mapper' does not contain a definition for 'MaterialTransform' and no accessible extension method 'MaterialTransform'
CS1061:
accepting a first argument of type 'Mapper' could be found (are you missing a using directive or an assembly reference?)
'Material' does not contain a definition for 'DiffuseMap'
Source MaterialMap.Source { get; }
Gets the data source of the material map; one of the MaterialMap.Source> enumerators.
CS0200: Property or indexer 'MaterialMap.Source• cannot be assigned to it is read only
CSOI 03: The name 'FileMaterialSource' does not exist in the current context
: 'MaterialMap' does not contain a definition for 'Filename'

Re: Texture mapping on a surface using c#

M_Kocyigit — Tue, 03 Dec 2024 07:00:38 GMT

Have you already tried testing and experimenting with the provided resources? If I have time, I will take a closer look.

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Texture mapping on a surface using c#

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Re: Texture mapping on a surface using c#

Re: Texture mapping on a surface using c#