AutoCAD DevBlog

Render To Off-screen and SUN Enabling

By Madhukar Moogala

We will discuss few workarounds to tackle the problem with the creation of an off-screen View in .NET,

For C++ interested user, following comprehensive sample should help.

Problem 1:

The problem is that the off-screen view that I have to create looks as a "mirror" or "upside down" of the initial view that i want to render.

Workaround: Currently .NET API gives in-correct results, to work around the behaviour, use

 using (Bitmap bitmap = offscreenView.RenderToImage(mySettings, myRectangle))

                    {

                    if (File.Exists("D:\\Temp\\RenderTestImage.Jpg"))

                        File.Delete("D:\\Temp\\RenderTestImage.Jpg");

                    bitmap.RotateFlip(RotateFlipType.Rotate180FlipX);

                    bitmap.Save("D:\\Temp\\RenderTestImage.Jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

                    }

 

Problem 2:

How to enable the SUN for my off-screen view.

public void RND()

        {

        Document acDoc = Application.DocumentManager.MdiActiveDocument;

        Database acDb = acDoc.Database;

        Editor ed = acDoc.Editor;

        /*Turn on SUN*/

     //   Application.SetSystemVariable("SUNSTATUS", 1);

        ViewportTableRecord vport = null;

        Sun sun = new Sun();

        sun.IsOn = true;

        using (Transaction acTrans = acDb.TransactionManager.StartTransaction())

            {

            vport = (ViewportTableRecord)acTrans.GetObject(acDoc.Editor.ActiveViewportId, OpenMode.ForWrite);

            vport.SetSun(sun);

            acTrans.Commit();

            }

        Autodesk.AutoCAD.Geometry.Point2d myScreenSize = (Point2d)Application.GetSystemVariable("screensize");

        double myWidth = myScreenSize.X;

        double myHeight = myScreenSize.Y;

        if (File.Exists("D:\\Temp\\RndImage.bmp"))

            File.Delete("D:\\Temp\\RndImage.bmp");

        ed.Command("_render", "", "render", myWidth.ToString(), myHeight.ToString(), "yes", "D:\\Temp\\RndImage.bmp");

        ed.Command("RENDERWINDOWCLOSE");

 

        }

 

I have not used renderToImage API, as of now, when SUN is enabled, rendering on off-screen does not display the effects of Sun, hence above workaround is proposed now.

Insert Cone Along The Axis of 3D Polyline

By Madhukar Moogala

This problem illustrates how we can insert a solid frustum along the axis of each segment of AcDb3dPolyline, the cone always points in right direction irrespective of view changes.

This may be useful in depicting flow direction in line diagrams of thermo-fluid dynamic analysis.

The code creates a temporary UCS on each segment of 3dpoly to ensure cone aligns always in correct direction.

Command Code:

  void testFlow()

  {

    bool OK = true;

    ads_name entres;

  ads_point ptres;

 

    while(OK)

      {

      if(acedEntSel(_T("Select 3d poly"),entres,ptres) != RTNORM)

        {

        OK = false;

         return;

        }

         /*Get List of vertex points*/

        AcGePoint3dArray listVertices;

        getListOfVerticesFromP3dLine(entres,listVertices);

        /*To avoid buffer overflow*/

        for(int i =0, j=1; i < listVertices.length()-1; i++)

          {

          insert_arrow_Adsk(listVertices.at(i), listVertices.at(j));

          j++;

 

          }

        listVertices.removeAll();

      }

  }

 

Utility Methods:

  void createUCS(AcGePoint3d origin_point,AcGeVector3d UCSXaxis,AcGeVector3d UCSYaxis)

    {

    Acad::ErrorStatus es;

    AcDbUCSTableRecord *myUCS =NULL;

 

    AcDbObjectId UCSId;

    AcDbUCSTable *pUCSTable;

    if (acdbHostApplicationServices()->workingDatabase()->getUCSTable(pUCSTable,AcDb::kForWrite)==Acad::eOk)

      {

 

      if( pUCSTable->getAt(L"myUCS", myUCS, AcDb::kForWrite) != Acad::eOk)

        {

        myUCS = new AcDbUCSTableRecord;

        /*Define UCS*/

        myUCS->setOrigin(origin_point);

        myUCS->setXAxis(UCSXaxis);

        myUCS->setYAxis(UCSYaxis);

 

        es=myUCS->setName(_T("MyUCS"));

        if (es != Acad::eOk)

          {

          acutPrintf(_T("\nFailed to set name"));

          return;

          }

        es=pUCSTable->add(UCSId,myUCS);

        }

 

      /*Modify UCS*/

 

      myUCS->setOrigin(origin_point);

      myUCS->setXAxis(UCSXaxis);

      myUCS->setYAxis(UCSYaxis);

      /*Close*/ 

      es= myUCS->close();

      es=pUCSTable->close();

 

      }

    else

      {

      acutPrintf(_T("\nFailed to get UCS table"));

      return;

      }

 

 

    //To set the current UCS, I accessed the active AcDbViewportTableRecord

    // and used setUCS to set the UCS I created as current.

 

 

    AcDbViewportTable *pVT; 

    es = acedVports2VportTableRecords();

    if (es != Acad::eOk)

      {

      acutPrintf(_T("\nFailed to load vport info into vport table records"));

      return;

      }

 

    es=acdbHostApplicationServices()->workingDatabase()->getViewportTable(pVT,AcDb::kForRead);

    if (es != Acad::eOk)

      {

      acutPrintf(_T("\nFailed to get vport table"));

      pVT->close();

      return;

      }

 

    AcDbViewportTableIterator* pIter = NULL;

 

    es=pVT->newIterator(pIter);

    if (es != Acad::eOk)

      {

      acutPrintf(_T("\nFailed to get vport table"));

      pVT->close();

      delete pIter;

      return;

      }

 

    for (pIter->start();!pIter->done();pIter->step())

      {

 

      AcDbViewportTableRecord* pRec;

      es=pIter->getRecord(pRec,AcDb::kForWrite); //it should be open for write mode

      if (es != Acad::eOk)

        {

        acutPrintf(_T("\nFailed to get vport table record"));

        pVT->close();

        pRec->close();

        delete pIter;

        return;

        } 

 

      ACHAR* name=NULL;

      es=pRec->getName(name);

      if (es != Acad::eOk)

        {

        acutPrintf(_T("\nFailed to get name from vport table"));

        pVT->close();

        pRec->close();

        delete pIter;

        return;

        } 

 

 

      if (wcscmp(name,_T("*Active"))==0)

        {

        es=pRec->setUcs(myUCS->objectId());

        }

 

      es=pRec->close();         

      }

    es=acedVportTableRecords2Vports(); //force update

 

    es=pVT->close();

    delete pIter;

    return ; 

    }

 

  void insert_arrow_Adsk(AcGePoint3d startPt, AcGePoint3d trailPt)

    {

 

    AcGePoint3d midPt = AcGePoint3d ((startPt.x+ trailPt.x)/2 ,(startPt.y+ trailPt.y)/2 ,(startPt.z+ trailPt.z)/2 );

    AcGeVector3d direction((trailPt.x-startPt.x),(trailPt.y-startPt.y),(trailPt.z-startPt.z));

    AcGePlane* tempPlane = new AcGePlane(midPt,direction);

    AcGeVector3d uaxis,vaxis;

    AcGePoint3d point;

 

 

    tempPlane->get(point,uaxis,vaxis);

 

    /*Create UCS\ set UCS as Current*/

    createUCS(midPt,uaxis,vaxis);

    AcGeMatrix3d mat;

 

    mat.setCoordSystem(midPt,uaxis,vaxis,direction);

    acedSetCurrentUCS(mat);

 

    /*get Currennt UCS ,transform Cone to that UCS*/

 

    acedGetCurrentUCS(mat);

 

    /*Create cone frustrum*/

    AcDb3dSolid* pSolid = new AcDb3dSolid();

 

    pSolid->setDatabaseDefaults();

    pSolid->setColorIndex(3);

 

    /*hardcode*/

    pSolid->createFrustum(30.0,5.0,5.0,0.0);

    pSolid->transformBy(mat);

 

    AcDbObjectId oId = AcDbObjectId::kNull;

    /*Post entity to DB*/

 

    postToDb(pSolid);

    mat.setToIdentity();

    acedSetCurrentUCS(mat);

    }

 

  void getListOfVerticesFromP3dLine( ads_name entres,  AcGePoint3dArray& vArray)

    {

    AcDbObjectId oId = AcDbObjectId::kNull;

    if(acdbGetObjectId(oId,entres) != Acad::eOk) return;

    AcDbSmartObjectPointer<AcDb3dPolyline> pEnt(oId,AcDb::kForWrite);

    if(pEnt != nullptr && eOkVerify(pEnt.openStatus()))

      {

      AcDbObjectIterator* pIter = pEnt->vertexIterator();

      AcGePoint3d trailPt ,midPt, startPt;

      for(pIter->start(); !pIter->done(); pIter->step())

        {

        AcDbSmartObjectPointer<AcDb3dPolylineVertex>pVertex(pIter->objectId(), AcDb::kForRead);

        if(eOkVerify(pVertex.openStatus()))

          {

          vArray.append(pVertex->position());

          }

        }

      }

    }

 

Working GIF:

Identify view change in AutoCAD

By Virupaksha Aithal

I have received an query from an ADN partner recently on identifying the view change in AutoCAD, like when user pan or zoom using mouse.
To identify the view change developers can use the editor rector viewChanged() (AcEditorReactor:: viewChanged()) in ObjectARX . However, in AutoCAD.NET API, the equivalent API is provided in document class Document::ViewChanged

[CommandMethod("ViewChnage")]
public void ViewChnage()
{
    Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
    doc.ViewChanged += doc_ViewChanged;
}

void doc_ViewChanged(object sender, EventArgs e)
{
    //
} 

Plot To Window Extents Using VBA

By Madhukar Moogala

I have received  a query from an ADN partner  that customer code to plot to window doesn’t plot and gives an empty print on certain drawings and same code works well for rest of drawings.

The root cause of such weird behaviour is that the code doesn’t handle transformation of extent points from WCS to DCS, i.e. When user picks coordinate points from Editor as Window extents, these needs to transformed to DCS coordinate system for correct preview and plot of Drawings.

Important: Always make sure extents points needs to Transformed from WCS to DCS, this true for C++ & .NET API too.

 

VBA code:

Public Sub Example_SetWindowToPlot()

        ' This example allows the user to define an area in the current layout

        ' and displays a plot preview of the defined area.

 

        AppActivate ThisDrawing.Application.Caption

 

        Dim point1 As Object, point2 As Object

 

        ' Get first point in window

        point1 = ThisDrawing.Utility.GetPoint(, "Click the lower-left of the window to plot.")

 

        ' Get second point in window

        point2 = ThisDrawing.Utility.GetPoint(, "Click the upper-right of the window to plot.")

 

 

 

        Dim point1DCS As Object, point2DCS As Object

 

        'Translate coordinates from WCS to DCS

 

        point1DCS = ThisDrawing.Utility.TranslateCoordinates(point1, acWorld, acDisplayDCS, False)

        point2DCS = ThisDrawing.Utility.TranslateCoordinates(point2, acWorld, acDisplayDCS, False)

 

        ReDim Preserve point1DCS(0 To 1)   ' Change this to a 2D array by removing the Z position

        ReDim Preserve point2DCS(0 To 1)   ' Change this to a 2D array by removing the Z position

 

        ' Send information about window to current layout

        ThisDrawing.ActiveLayout.SetWindowToPlot(point1DCS, point2DCS)

 

        ' Read back window information

        ThisDrawing.ActiveLayout.GetWindowToPlot(point1DCS, point2DCS)

 

        MsgBox "Press any key to plot the following window:" & vbCrLf & vbCrLf & _

               "Lower Left: " & point1(0) & ", " & point1(1) & vbCrLf & _

               "Upper Right: " & point2(0) & ", " & point2(1)

 

        ' Be sure to plot a view, not some other plot style

        ThisDrawing.ActiveLayout.PlotType = acWindow

 

        ' Send Plot To Window

        ThisDrawing.ActiveLayout.ConfigName = "DWG to PDF.pc3"

        ThisDrawing.Plot.DisplayPlotPreview acFullPreview

 

    End Sub

Positioning GeographicMarker Using ObjectARX

By Madhukar Moogala

In addition to previous blog post we saw how we can add a GeoPositionMarker to a drawing with already GeographicMarker enabled.

In current blog we will see how we can leverage ObjectARX API to create GeoCoordinate system and place it in the drawing with user defined Latitudes and Longtitudes.

For this sample, I’m creating an UTM84-43N GIS coordinate system, Universal Transverse Mercator is not a single map projection, but divided in to sixty zones.

Here is an excerpt from Wikipedia about UTM.

The Universal Transverse Mercator (UTM) conformal projection uses a 2-dimensional Cartesian coordinate system to give locations on the surface of the Earth. Like the traditional method of latitude and longitude, it is ahorizontal position representation, i.e. it is used to identify locations on the Earth independently of vertical position. However, it differs from that method in several respects.

The UTM system is not a single map projection. The system instead divides the Earth into sixty zones, each being a six-degree band of longitude, and uses a secant transverse Mercator projection in each zone.

I’m using Latitude and Longitude values of our Autodesk’ Hyderabad office. : 17.434586,78.384402

Thanks to Tat-Lee for helping with suggestion while I was struggling to generate a Live map programmatically.

Do make note :

• AcGePoint3d is expected to be (long, lat) and not (lat, long)
• Reference point is in the coordinates of the projected coordinate system and not in geodetic.
• Design point is in model-space coordinates

C++ code:

void GeographicLocationMarker( )

{

      /*Map Projection type*/

    const AcString csId(L"UTM84-43N");

  /*Creating the projected Coordinate Sytem */

  Acad::ErrorStatus es;

    AcDbGeoCoordinateSystem* pGeoCS;

    AcDbGeoCoordinateSystem::create(csId, pGeoCS);

     if (NULL == pGeoCS)

        return;

     AcString xmlStr;

   /*Get XML type*/

   es = pGeoCS->getXmlRepresentation(xmlStr);

  /*Checking the output of CRS*/

  acutPrintf(_T("\ncrsName: %s"),xmlStr.kACharPtr());

 

    if(xmlStr.isEmpty()) return;

 

    AcDbObjectId geoId;

    AcDbObjectPointer<AcDbGeoData> pGeoData;

    AcDbDatabase* pDb = acdbHostApplicationServices()->workingDatabase();

    acdbGetGeoDataObjId(pDb, geoId);

 

  /*Post our Geodata to Database,

  AcDbGeoData is not an Entity, it is stored in Model-Space's Extension Dictionary*/

    if (geoId.isNull())

    {

        pGeoData.create();

        pGeoData->setBlockTableRecordId(acdbSymUtil()->blockModelSpaceId(pDb));

        pGeoData->postToDb(geoId);

    }

    else

    {

        pGeoData.open(geoId, AcDb::kForWrite);

    }

 

    if (NULL == pGeoData.object())

        return;

  /* The spatial coordinate system string.

  It can be the id of the coordinate system or the XML/WKT representation*/

     es = pGeoData->setCoordinateSystem(xmlStr);

  /* The design coordinate system is considered to be local, aka

     an engineering coordinate system.*/

  es = pGeoData->setCoordinateType(AcDbGeoData::kCoordTypLocal);

    es = pGeoData->setHorizontalUnits(AcDb::kUnitsMillimeters);

    es = pGeoData->setVerticalUnits(AcDb::kUnitsMillimeters);

    es = pGeoData->setDesignPoint(AcGePoint3d::kOrigin);

    es = pGeoData->setUpDirection(AcGeVector3d::kZAxis);

    /*Lat and Long of Hyderabad : 17.434586,78.384402*/

  /*Note: AcGePoint3d expected to be Long,Lat,alt*/

  AcGePoint3d refPtInUTM84, refPtInLatLong(78.384402,17.434586,0.0);

    /*Get WCS point*/

  pGeoData->transformFromLonLatAlt(refPtInLatLong,refPtInUTM84);

  pGeoData->setReferencePoint(refPtInUTM84);

  pGeoData->setNorthDirectionVector(AcGeVector2d::kYAxis);

 

      /*clean up*/

    delete pGeoCS;

    pGeoData.close();

 

 

  }

 

After the code,  turn on GEOMAP from ribbon or command, set type to Aerial view.

If you find difficult in loading Maps, make sure if you have logged in A360.

Here are few troubleshooting tips to generate Maps perfectly.

1. Log out of A360.
2. Quit AutoCAD.
3. Right-click the Autodesk 360 icon in the Windows system tray and choose  Exit.
4. Run  Windows Task manager and terminate the processes AcSettingsSync.exe and AdSync.exe if they are running.
5. Open a Windows File Explorer window and navigate to the following folder:
   %localappdata%\Autodesk
   Note: You can also paste "%localappdata%" into the address bar of a Windows File Explorer.
6. Delete the folder C:\Users\....\AppData\Local\Autodesk\Web Services.
7. Restart AutoCAD.

Setting Color to Each Face of Solid

By Madhukar Moogala

The below is self explanatory, we ‘ll look at it how we can traverse to each face and paint with different colours.

void TestBrep(void)

{

    Adesk::Int32 len;

    ads_name  ssname0;

  struct resbuf *buffer;

    buffer = acutBuildList(-4, _T("<AND"),

              RTDXF0, _T("3DSOLID"),

              -4, _T("AND>"), RTNONE);

    acutPrintf(_T("\nSelect a box:"));

    acedSSGet(NULL, NULL, NULL, buffer, ssname0);

    acutRelRb(buffer);

  if (RTNORM == acedSSLength(ssname0, &len))

    {

        ads_name  ent;

        AcDbObjectId entId;

    for(long k = 0; k < len; k++)

        {

            acedSSName(ssname0, k, ent);

            acdbGetObjectId(entId, ent);

 

      settingDifferentColorToEachFace(entId);

        }

        acedSSFree(ssname0);

    }

}

 

void settingDifferentColorToEachFace(AcDbObjectId solidId)

{

  AcCmColor specialColor;

  AcDb3dSolid* pSolid;

    if (Acad::eOk == acdbOpenObject(pSolid, solidId, AcDb::kForRead))

    {

        AcDbFullSubentPath path(solidId, AcDbSubentId());

    AcBrBrep brep;

        AcBr::ErrorStatus bs = brep.setSubentPath(path);

        if (bs != AcBr::eOk)

            return;

   //Initialize the BrepFace traverser

        AcBrBrepFaceTraverser bft;

        bs = bft.setBrep(brep);

        if (bs != AcBr::eOk)

            return;

 

        AcArray<AcDbSubentId> arrSubentId;

        // Traverse all faces

        for (;!bft.done();bft.next())

        {

            AcBrFace face;

            bs = bft.getFace(face);    

            if (bs != Acad::eOk)

            {

                acutPrintf(L"\ngetFace failed");

                break;

            }

            AcDbFullSubentPath    Path(kNullSubent);

            AcDbSubentId          subentId;

            AcBr::ErrorStatus bss = face.getSubentPath(Path);

            subentId = Path.subentId();

 

            arrSubentId.append(subentId);

        }

 

        pSolid->upgradeOpen();

        for (int i = 0; i < arrSubentId.length(); i++)

        {

      specialColor.setColorIndex(i);

            pSolid->setSubentColor(arrSubentId[i],specialColor);

        }

        pSolid->downgradeOpen();

    }

 

    pSolid->close();

}

 

Switching assembly references based on build configuration

By Balaji Ramamoorthy

Recently, a developer came up with this query :

Is there a simple way to have a single copy of my code configured to compile to different folders with different references based on the desired version of AutoCAD to be run ?

This is not strictly an AutoCAD API related query but it is very relevant to how we build plugins for AutoCAD. It is a common requirement that we add references from different paths based on the AutoCAD version for which we are building the plugin.

A simple way to get this working is to create separate build configurations in your Visual Studio solution.

Now, open the .csproj in a text editor and manually include the "Condition" for each of the references.

As an example, here is the change to include different versions of the interop assembly for Sheetset manager for each build configuration.

<Reference Include="Interop.ACSMCOMPONENTS20Lib" Condition="'$(Configuration)'=='Debug2015'">
<HintPath>..\..\..\..\ObjectARX 2015\inc-x64\ACSMCOMPONENTS20Lib.dll</HintPath>
<EmbedInteropTypes>True</EmbedInteropTypes>
</Reference>
<Reference Include="Interop.ACSMCOMPONENTS20Lib" Condition="'$(Configuration)'=='Debug2016'">
<HintPath>..\..\..\..\ObjectARX 2016\inc-x64\ACSMCOMPONENTS20Lib.dll</HintPath>
<EmbedInteropTypes>True</EmbedInteropTypes>
</Reference>

If you are using any other technique to achieve this already, please do share by posting your comments. I am sure that will help many other developers. Thank you.

DGNIMPORT to a new document and document switching

By Balaji Ramamoorthy

Recently, one of my colleague had this query :

• I am importing the DGN (not to the current drawing). This creates a new drawing and I want to switch to the new drawing and perform other commands. What is the best way to switch the current drawing to the other open drawing.

Here is a code snippet to do that.

The command that invokes the "DGNIMPORT", makes the newly imported document as Active. After the document is made active, you are in the new document’s context and to verify it, the editor.writemessage will output the message in the new document's command prompt.

[CommandMethod("Test1", CommandFlags.Session)]
public async static void Test1Method()
{
    DocumentCollection dm = Application.DocumentManager;
    Editor ed = 
    Application.DocumentManager.MdiActiveDocument.Editor;
    try
    {
        PromptResult promptDgnPath
                = ed.GetString("\nEnter DGN file name: ");
        if (promptDgnPath.Status != PromptStatus.OK)
            return;

        try
        {
            await dm.ExecuteInCommandContextAsync(
                async (obj) =>
                {
                    await ed.CommandAsync(new object[] 
                    { 
                        "_.-DGNIMPORT", 
                        promptDgnPath.StringResult, 
                        "Default", 
                        "Master", 
                        "Standard" 
                    });
                },
                null
            );
        }
        catch (System.Exception ex)
        {
            ed.WriteMessage("\nException: {0}\n", ex.Message);
        }

        DocumentCollection docs = Application.DocumentManager;
        foreach (Document doc in docs)
        {
            if (doc.Name.StartsWith("Drawing"))
            {
                Application.DocumentManager.MdiActiveDocument 
                                                        = doc;
                break;
            }
        }
        ed.WriteMessage("Hello !!");
    }
    catch (System.Exception ex)
    {
        ed.WriteMessage(ex.Message);
    }
}

Mapping a material texture on a SubDMesh

By Balaji Ramamoorthy

When a material is assigned to the SubDMesh, the mapper (AcGiMapper) associated with the material takes care of most of the details involved in mapping the texture on to the SubDMesh. The mapper can be configured for its projection, scaling, translation, tiling and such parameters that affect the texture mapping. This approach is suitable for complex texture mapping and if your mapping fits one of the existing projection methods that AcGiMapper provides. In this blog post, we will look at another approach that relies on AcDbSubDMesh::setVertexTextureArray to set the texture mapping. If the SubDMesh was created using vertex and face information and you have an image that needs to be mapped, the "setVertexTextureArray" can be used to control the mapping.

Thanks to Erik Larsen from our AutoCAD engineering team for his help in getting the mapping right. Please note that the texture coordinates are normalized and does not depend on the actual image dimensions.

Here is a screenshot of an image mapped on to a box shaped SubDMesh.

Here is the code :

static void SubDMeshWithTexture()
{
	AcDbSubDMesh *ptrMesh = new AcDbSubDMesh();
		
	int imgWidth = 320;
	int imgHeight = 160;

	// We will create a box shaped SubDMesh
	// The four side put together match the 
	// image width. 
	// This will let us fully wrap the image on the box shaped mesh.
	int cx = imgWidth / 4;
	int cy = cx;
	int cz = imgHeight;

	double points[30];
	int triangles[24];

	// Vertices 
	points[0]=0.0; points[1]=0.0; points[2]=0.0;
	points[3]=cx; points[4]=0.0; points[5]=0.0;
	points[6]=cx; points[7]=cy; points[8]=0.0;
	points[9]=0.0; points[10]=cy; points[11]=5.0;

	points[12]=0.0; points[13]=0.0; points[14]=cz;
	points[15]=cx; points[16]=0.0; points[17]=cz;
	points[18]=cx; points[19]=cy; points[20]=cz;
	points[21]=0.0; points[22]=cy; points[23]=cz;

	points[24]=0.0; points[25]=0.0; points[26]=0.0;
	points[27]=0.0; points[28]=0.0; points[29]=cz;

	// Face information as triangles
	triangles[0]=0; triangles[1]=1; triangles[2]=5;
	triangles[3]=0; triangles[4]=5; triangles[5]=4;

	triangles[6]=7; triangles[7]=6; triangles[8]=2;
	triangles[9]=7; triangles[10]=2; triangles[11]=3;

	triangles[12]=6; triangles[13]=5; triangles[14]=1;
	triangles[15]=6; triangles[16]=1; triangles[17]=2;

	triangles[18]=8; triangles[19]=7; triangles[20]=3;
	triangles[21]=8; triangles[22]=9; triangles[23]=7;

	// Create the subDMesh using vertex and face data
	Acad::ErrorStatus es  = CreateSubDMesh
				(10, 8, points,triangles, ptrMesh);
	if(es == Acad::eOk)
	{
		AcDbObjectId meshId = AcDbObjectId::kNull;
		AcDbBlockTable*        pBlockTable;
		AcDbBlockTableRecord*  pSpaceRecord;

		AcDbDatabase *pDb = acdbCurDwg();

		pDb->getBlockTable(pBlockTable, AcDb::kForRead);
		pBlockTable->getAt(
			ACDB_MODEL_SPACE, 
			pSpaceRecord, AcDb::kForWrite);
		es = pSpaceRecord->appendAcDbEntity(
										meshId, ptrMesh);
		es = ptrMesh->close();

		es = pSpaceRecord->close();
		es = pBlockTable->close();

		AcDbEntity* pEnt = NULL;
		acdbOpenAcDbEntity(pEnt, meshId, AcDb::kForWrite);

		// Create a material with our custom image 
		// as its texture
		CreateMaterial(_T("Fusion"));

		AcDbSubDMesh *pSubDMesh = AcDbSubDMesh::cast(pEnt);
		if(pSubDMesh != NULL)
		{
			// Assign the material to the subDMesh
			pSubDMesh->setMaterial(L"Fusion", Adesk::kTrue);

			// Ensure the material mapping is as we expect
			// fully wrapped around the faces
			AcGePoint3dArray textureArray;
			textureArray.append(AcGePoint3d(0.0, 0.0, 0.0));
			textureArray.append(AcGePoint3d(0.25, 0.0, 0.0));
			textureArray.append(AcGePoint3d(0.5, 0.0, 0.0));
			textureArray.append(AcGePoint3d(0.75, 0.0, 0.0));
			textureArray.append(AcGePoint3d(0.0, 1.0, 0.0));
			textureArray.append(AcGePoint3d(0.25, 1.0, 0.0));
			textureArray.append(AcGePoint3d(0.5, 1.0, 0.0));
			textureArray.append(AcGePoint3d(0.75, 1.0, 0.0));

			textureArray.append(AcGePoint3d(1.0, 0.0, 0.0));
			textureArray.append(AcGePoint3d(1.0, 1.0, 0.0));

			pSubDMesh->setVertexTextureArray(textureArray);
		}
		pEnt->close();
	}
}

static Acad::ErrorStatus CreateSubDMesh(int numberOfPoints, 
									int numberOfTriangles,
									double *points,
									int *triangles, 
									AcDbSubDMesh *ptrMesh) 
{
	if((numberOfPoints <3) || (numberOfTriangles<1)) 
		return eNotImplementedYet;

	Acad::ErrorStatus es;
	AcGePoint3dArray *vertexArray 
			= new AcGePoint3dArray ();
	AcArray *faceArray 
			= new AcArray();

	vertexArray->setPhysicalLength(numberOfPoints*3);
	faceArray->setPhysicalLength(numberOfTriangles*3);

	for(int i=0; iappend(pt);
	}

	int id=-1;
	for(int i=0; iinsertAt(id,3); 
		
		id++; faceArray->insertAt(id,triangles[i*3]);

		id++; faceArray->insertAt(id,triangles[i*3+1]);

		id++; faceArray->insertAt(id,triangles[i*3+2]); 
	};

	es = ptrMesh->setSubDMesh(*vertexArray,*faceArray, 0);

	delete vertexArray;
	delete faceArray;

	return es;
}

static void CreateMaterial(
		const ACHAR* name, AcDbDatabase *pDb) 
{ 
	AcDbDictionary *pMaterialDict; 
	Acad::ErrorStatus es; 
	es = pDb->getMaterialDictionary(
		pMaterialDict, AcDb::kForWrite);
	if (es == Acad::eOk)
	{ 
        AcGiImageFileTexture tex;
		tex.setSourceFileName(
			_T("D:\\TestFiles\\FusionLogo.jpg"));
 
		double uScale = 1.0;
		double vScale = 1.0;
        double uOffset = 0;
		double vOffset = 0;
 
        AcGeMatrix3d mx;
		mx(0, 0) = uScale;
		mx(0, 1) = 0;
		mx(0, 2) = 0;
		mx(0, 3) = uScale * uOffset;

		mx(1, 0) = 0;
		mx(1, 1) = vScale;
		mx(1, 2) = 0;
		mx(1, 3) = vScale * vOffset;

		mx(2, 0) = 0;
		mx(2, 1) = 0;
		mx(2, 2) = 1;
		mx(2, 3) = 0;

		mx(3, 0) = 0;
		mx(3, 1) = 0;
		mx(3, 2) = 0;
		mx(3, 3) = 1;
			 
        AcGiMapper mapper;
		mapper.setProjection
			(AcGiMapper::Projection::kBox);
		mapper.setUTiling
			(AcGiMapper::Tiling::kCrop);
		mapper.setVTiling
			(AcGiMapper::Tiling::kCrop);
		mapper.setAutoTransform
			(AcGiMapper::AutoTransform::kNone);
		mapper.setTransform(mx);

        AcGiMaterialMap map;
		map.setSourceFileName(name);
		map.setTexture(&tex);
		map.setBlendFactor(1.0);
		map.setMapper(mapper);

		AcDbMaterial *pMaterialObj 
			= new AcDbMaterial(); 
		pMaterialObj->setName(name);

		AcDbObjectId materialId; 
		es = pMaterialDict->setAt
			(name, pMaterialObj, materialId); 

		AcGiMaterialColor diffuseColor; 
		pMaterialObj->setDiffuse
			(diffuseColor, map);
		pMaterialObj->setMode
			(AcGiMaterialTraits::kRealistic);

		pMaterialObj->close(); 
		pMaterialDict->close(); 
	} 
} 

MLeader text that reflects MLeaderStyle settings

By Balaji Ramamoorthy

Here is a short code snippet that creates an MLeader based on an existing MLeaderStyle. For the MLeader's text to correctly follow any changes made to the MLeaderStyle, it is necessary to clone the MLeaderStyle.DefaultText and use it as the MLeader's text. Creating a new MText without relying on the DefaultText can cause the text to not reflect any later changes that are made to the MLeaderStyle.

Thanks to Xin Xu from the AutoCAD engineering team for providing this tip.

[CommandMethod("MLTest")]
public void MLTestMethod()
{
    Editor ed = default(Editor);
    ed = Application.DocumentManager.MdiActiveDocument.Editor;

    PromptPointResult ppr1 = default(PromptPointResult);
    ppr1 = ed.GetPoint(
        new PromptPointOptions("Select start point"));

    if (ppr1.Status != PromptStatus.OK)
        return;

    PromptPointResult ppr2 = default(PromptPointResult);
    ppr2 = ed.GetPoint(
            new PromptPointOptions("Select end point"));
    if (ppr2.Status != PromptStatus.OK)
        return;

    Database db = HostApplicationServices.WorkingDatabase;

    ObjectId myMLeaderId = ObjectId.Null;
    using (Transaction trans 
                = db.TransactionManager.StartTransaction())
    {
        ObjectId myleaderStyleId = db.MLeaderstyle;
        MLeaderStyle mlstyle 
            = trans.GetObject(myleaderStyleId, 
                        OpenMode.ForRead) as MLeaderStyle;

        using (MLeader myMLeader = new MLeader())
        {
            myMLeader.SetDatabaseDefaults();
            myMLeader.PostMLeaderToDb(db);
            myMLeaderId = myMLeader.ObjectId;
            myMLeader.MLeaderStyle = db.MLeaderstyle;

            int leaderIndex = myMLeader.AddLeader();
            int leaderLineIndex 
                = myMLeader.AddLeaderLine(leaderIndex);
            myMLeader.AddFirstVertex(
                        leaderLineIndex, ppr1.Value);
            myMLeader.AddLastVertex(
                        leaderLineIndex, ppr2.Value);

            MText myMText 
                = mlstyle.DefaultMText.Clone() as MText;
            if (myMText != null)
            {
                myMText.SetContentsRtf("Autodesk");
                myMLeader.MText = myMText;
            }
        }
        trans.Commit();
    }
}