AutoCAD DevBlog

MLeader may throw eInvalidContext exception

By Augusto Goncalves

The MLeader object (and the equivalent AcDbMLeader in C++) support a block as the text component, as described at this previous blog post. One of the required steps is set the BlockPosition property (or setBlockPosition in C++), but this may throw eInvalidException.

In fact this exception is expected if the extents of the block cannot be defined, for instance, if there are invisible attributes defined on it.

To avoid this, simply set the MLeader points with AddLeaderLine and/or AddFirsVertex before setting the block data.

Decomposing Material Mapper Transform Matrix

By Madhukar Moogala

Question: Is it possible to return origin, rotation, the x-y- scale factors and offset values from the Matrix3d of  MaterialMapper.Transform ?

Answer: Yes ,it is possible to retrieve details from  transform matrix of an Entity's material mapper , I have demonstrate below assuming user has selected a 3DFace entity on which Material is applied using MaterialMap command iteractively and adjusted rotation ,offset and scale as per user needs.

Somethink like this as shown in below screenshot.

Note : If AcGiMapper::autoTransform() is set to kObject or kModel, then you will not be able to recover the scale/translation/rotation, as the GS will dynamically compute it based on whatever entity/selection the mapper is applied to.

C++ Code :

static void ASDKMyGroupTestMapper()

{

Acad::ErrorStatus es;

ads_name entres;

ads_point ptres;

AcGeVector3d scale;

AcGeVector3d rotation;

AcGeVector3d translate;

AcGeMatrix3d mat;

/*Select Entity*/

if(RTNORM != acedEntSel(_T("Select 3DFace entity"),entres,ptres))

return;

AcDbObjectId objId = AcDbObjectId::kNull;

if((es = acdbGetObjectId(objId,entres) ) != Acad::eOk)

return;

AcDbEntity* pFaceEntity = NULL;

if ((es = acdbOpenAcDbEntity(pFaceEntity,objId,AcDb::kForRead) )

!= Acad::eOk) return;

 

if(pFaceEntity->isA() == AcDbFace::desc())

{

AcDbFace* pFace =  AcDbFace::cast(pFaceEntity);

AcGiMapper mapper;

AcDbMaterial* material = NULL;

AcGiMaterialMap materialMap;

if((es = acdbOpenObject((AcDbObject*&)material,pFace->materialId(),

AcDb::kForRead))!= Acad::eOk)

{

pFaceEntity->close();

return;

}

double strength=0.0;

AcGiMaterialColor color;

/*Get diffuse gives details about Texture in general,

and what component to be used to retrieve materialmap

can be found from AcDbMaterial::channelFlags*/           

material->diffuse(color,materialMap);

 

mat = materialMap.mapper().transform();

if(materialMap.mapper().autoTransform() < 2)

{

decomposeMatrix(mat,scale,rotation,translate);

}

 

pFaceEntity->close();

material->close();

 

 

 

}

acutPrintf(_T("\n Rotation Angle : %2f \n"),rotation.z*(180/M_PI));

acutPrintf(_T("\n Scale X : %2f , Scale Y : %2f \n"),scale.x,scale.y);

/*You may have to negate offset values of Translate vector for correct sign*/

acutPrintf(_T("\n Translation Vector: %2f,%2f \n"),-translate.x,-translate.y);

 

 

}

 

static void decomposeMatrix (const AcGeMatrix3d &mat,

AcGeVector3d &scale,

AcGeVector3d &rotate,

AcGeVector3d &translate)

{

// Scale - assume always positive, and must be non-zero

scale.x = 1.0/AcGeVector3d(mat(0,0), mat(0,1), mat(0,2)).length();

scale.y = 1.0/AcGeVector3d(mat(1,0), mat(1,1), mat(1,2)).length();

scale.z = 1.0/AcGeVector3d(mat(2,0), mat(2,1), mat(2,2)).length();

if (scale.x == 0.0)

scale.x = 1.0;

if (scale.y == 0.0)

scale.y = 1.0;

if (scale.z == 0.0)

scale.z = 1.0;

 

// Translation

translate =  mat.translation();

translate.x *= scale.x;

translate.y *= scale.y;

translate.z *= scale.z;

 

// Rotation – assume only rotation about the Z axis

double acosVal = mat(0,0) / scale.x;

if (acosVal > 1.0)

acosVal = 1.0;

else if (acosVal < -1.0)

acosVal = -1.0;

 

double zAngle = acos(acosVal);

assert(0.0 <= zAngle && zAngle <= M_PI);

if (mat(0, 1) > 0.0)

zAngle = 2.0 * M_PI - zAngle;

 

rotate.x = 0.0;

rotate.y = 0.0;

rotate.z = zAngle;

}

C# .NET code :

[CommandMethod("TestMapper")]

public void Mappertest()

{

Document activeDoc = Application.DocumentManager.MdiActiveDocument;

Database db = activeDoc.Database;

Editor ed = activeDoc.Editor;

PromptEntityResult oRes = ed.GetEntity("Select 3dFace");

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

Vector3d scale = default(Vector3d);

Vector3d rotate = default(Vector3d);

Vector3d translate = default(Vector3d);

 

using (Transaction oTrans = db.TransactionManager.StartTransaction())

{

Face oFace = oTrans.GetObject(oRes.ObjectId, OpenMode.ForRead) as Face;

 

if (oFace != null)

{

string strMat = oFace.Material;

ObjectId nMat = oFace.MaterialId;

Material material = oTrans.GetObject(nMat,OpenMode.ForRead) as Material;

ChannelFlags cFlasg = material.ChannelFlags;

MaterialDiffuseComponent mDC = material.Diffuse;                                 

MaterialMap materialMap = mDC.Map;                            

Matrix3d tranform = materialMap.Mapper.Transform;

double scaleD = tranform.GetScale();               

if (materialMap.Mapper.AutoTransform == AutoTransform.InheritAutoTransform ||

    materialMap.Mapper.AutoTransform == AutoTransform.None)

DecomposeMatrix(tranform , ref scale, ref rotate, ref translate);

/*You have negate offset value to reflect correct sign*/

ed.WriteMessage("Rotation Angle : " + rotate.Z * (180 / Math.PI) + "\n"

                + "Scale X :" + Math.Round(scale.X) + " Scale Y : " + Math.Round(scale.Y) + "\n" +

                "Translation Vector offset Values :" + -translate.X + "," + -translate.Y);

 

 

}

oTrans.Commit();

}

 

 

}

 

public void DecomposeMatrix( Matrix3d mat, ref Vector3d scale, ref Vector3d rotate, ref Vector3d translate)

{

// Scale - assume always positive, and must be non-zero

Vector3d v3dOne= new Vector3d(mat[0, 0], mat[0, 1], mat[0, 2]);

Vector3d v3dTwo = new Vector3d(mat[1, 0], mat[1, 1], mat[1, 2]);

Vector3d v3dThree = new Vector3d(mat[2, 0], mat[2, 1], mat[2, 2]);

 

//    scale = new Vector3d(v3dOne.Length, v3dTwo.Length, v3dThree.Length);

scale = new Vector3d(1/v3dOne.Length, 1/v3dTwo.Length, 1/v3dThree.Length);

if (scale.X == 0)

scale = new Vector3d(1.0, scale.Y, scale.Z);

if (scale.Y == 0)

scale = new Vector3d(scale.X, 1.0, scale.Z);

if (scale.Z == 0)

scale = new Vector3d(scale.X, scale.Y, 1.0);

// Translation

translate = mat.Translation;

translate = new Vector3d(translate.X * Math.Round(scale.X), translate.Y*Math.Round(scale.Y), translate.Z*Math.Round(scale.Z));

// Rotation – assume only rotation about the Z axis

double acosValue = mat[0, 0] / scale.X;

if (acosValue > 1.0)

acosValue = 1.0;

else if (acosValue < -1.0)

acosValue = -1.0;

double zAngle = Math.Acos(acosValue);

Debug.Assert(0.0 <= zAngle && zAngle <= Math.PI);

if(mat[0,1] > 0.0)

zAngle = 2.0 * Math.PI - zAngle;

rotate = new Vector3d(0.0, 0.0, zAngle);

 

}

Output :

Rotation Angle : 60.0000016696521

Scale X :1 Scale Y : 2

Translation Vector offset Values :12,15

AcDbRegion::transformBy

By Madhukar Moogala

Question:  I have a situation where the use of the method AcDbRegion::transformBy is giving me different results in AutoCAD 2015 as opposed to AutoCAD 2014. Can you tell me what has changed in the method that would account for the change.

Answer : It worked in Acad 2014 because we used a bigger tolerance before (equalPoint to 1.0e-8 and  equalVector to 1.0e-6). In Acad 2015 the tolerance setting was removed,this change is having impact on few scenarios ,one such scenario is illustrated below and possible workaround is also demonstrated. Thanks to our ADN partner for surfacing this behavior.

To restore legacy behavior in such circumstances we may have to reset system wide tolerance to

/*Resetting sytsem wide tolerance for ACAD 2015*/

AcGeContext::gTol.setEqualPoint(1.0e-8);

AcGeContext::gTol.setEqualVector(1.0e-6);

static void transformTest()

{

/*Resetting sytsem wide tolerance for ACAD 2015*/

AcGeContext::gTol.setEqualPoint(1.0e-8);

AcGeContext::gTol.setEqualVector(1.0e-6);

double epTol = AcGeContext::gTol.equalPoint();

double evTol = AcGeContext::gTol.equalVector();

CString msg;

msg.Format(_T("point tolerance is %e, and vector tolerance is %e\n"), epTol, evTol);

acedPrompt(msg);

// Second, create a transform matrix that maps from one coordinate syste to another

AcGePoint3d startPoint;

AcGeVector3d mStockProfileXDir, mExtrudeDir, mNormalDir;

startPoint.set(12342.705102605765, -14874.057509290647, 25.766600469474248);

mStockProfileXDir.set(0.00000000000000000, 1.0000000000000000, 0.00000000000000000);

mNormalDir.set(-0.048960818631765893, -6.4357153980460105e-012, 0.99880069995915965);

mExtrudeDir.set(-0.99880069995915977, 0.00000000000000000, -0.048960818631764047);

AcGeMatrix3d xform;

xform.setToAlignCoordSys(AcGePoint3d(0, 0, 0),

                            AcGeVector3d::kXAxis,

                            AcGeVector3d::kYAxis,

                            AcGeVector3d::kZAxis,

                            startPoint,

                            mStockProfileXDir,

                            mNormalDir,

                            mExtrudeDir);

// Is the new coordinate system orthogonal?

if (!xform.isUniScaledOrtho())

    acedPrompt(_T("Transform matrix axes are not orthogonal\n"));

else

    acedPrompt(_T("Transform matrix axes are orthogonal\n"));

// Finally, transform a region to the new coordinate system.

AcDbVoidPtrArray curves, regions;

AcDbCircle *pTestCircle = new AcDbCircle(AcGePoint3d::kOrigin, AcGeVector3d::kZAxis, 10.0);

if (pTestCircle != NULL)

{

    curves.append(pTestCircle);

    AcDbRegion::createFromCurves(curves, regions);

    if (regions.length() != 0)

    {

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

        {

            AcDbRegion* testRegion = static_cast<AcDbRegion*>(regions[i]);

            Acad::ErrorStatus es = testRegion->transformBy(xform);

            delete testRegion;

            msg.Format(_T("The transform operation returned %d\n"), es);

            acedPrompt(msg);

        }

    }

    delete pTestCircle;

}

}

Edit:

Caution:

It should be noted that lowering the existing precision can also have drawbacks and unwanted side-effects.

I recommend to not change the global tolerances as described in that article below, as it impacts not only the app that does this, but it impacts the tolerances globally (across all loaded apps, and also for AutoCAD itself).

The global tolerances should be changed only in a local scope when doing calculations that require them, and should be reset to the previous defaults afterwards.

An online event with an opportunity to receive up to US $100 per app published and win one of eight iPad minis!

By Virupaksha Aithal

We are excited to announce the 2014 Autodesk® Exchange Apps Hackathon. While similar in concept to the Portathon that we held in 2013, this event is bigger, better, has new competitions and great prizes. Anyone can participate from anywhere in the world and at any time both before the event and during the Hackathon days. We’ve assembled a great line up of speakers to give presentations and demos on hot topics that will help your overall app development and technical experts will be on hand to help and guide you.

The Autodesk Exchange Apps Hackathon is a virtual web based Hackathon.  It’s a community event that gives you the opportunity to work closely with other members of the software development community and Autodesk engineers — in real time, developing new apps for Autodesk Exchange. 

The Hackathon will run from 9:00 a.m. U.S. Pacific Time (PT) on Saturday, September 20, 2014 to 4 p.m. PT on September 21, 2014. You can participate from anywhere you have internet access.  

The Hackathon is a free event.  Plus, there is a reward!  For all new apps submitted to the Autodesk Exchange Apps store by midnight on September 30, 2014 and accepted for publication in the store by November 30, 2014, you will receive US$ 100 per “non-Free” app and US $50 “Free or Trial” app for up to 5 apps per company.

More Information and Registration:

Head on over to exchangeapphack.com for details on the event, including a FAQ, the schedule and speaker line up, the Rules and the Registration link.

If you have any questions about the Hackathon or the Cloud Apps and Sustainability Apps competitions, please send an email to [email protected]. 

Using CUIx resource dll with image transparency

By Philippe Leefsma

This post and associated code samples is a courtesy from one of our ADN member: Michael Csikos. Thanks Michael!

This illustrates how to use .ico files in a resource-only dll for your cuix files. By default the cuix file accepts resource dlls with .bmp files, however .bmp do not support transparency, which can make your button icons look much nicer in AutoCAD UI.

Unfortunately this approach isn’t documented anywhere in the AutoCAD programming help, so Michael was digging out this workaround: by manually editing the resource file (.rc) of your resource-only dll project, you can have the cuix support .ico files. Once you added a new ico resource through the Visual Studio editor, modify the “ICO” property of the resource to “RCDATA” as illustrated in the sample below:

//////////////////////////////////////////////////////////////////

// Icon with lowest ID value placed first to ensure application

// icon remains consistent on all systems.

IDI_TRIANGLE16     RCDATA           ".\\resources\\icon1.ico"

IDI_TRIANGLE32     RCDATA           ".\\resources\\icon2.ico"

#endif    // English (Australia) resources

//////////////////////////////////////////////////////////////////

You can then compile your dll and place it in the same folder than the cuix file using the resource. The same approach doesn’t work for .png unfortunately.

On top of that Michael also provided a C# sample that illustrates how to programmatically generate a cuix file using those resources. Generating the cuix file from the code is a very efficient approach, as it allows to quickly and easily modify and re-generate the cuix files as needed.

The sample creates extension methods (see CustomizationExtensions.cs) which makes it a lot easier to add new tabs, panels, rows and buttons.

An extract of his code looks like below:

var debugFolder          =

    Path.GetDirectoryName(

        Assembly.GetExecutingAssembly().Location);

-

var cs                   = new CustomizationSection();

var menuGroup            = cs.MenuGroup;

var tab                  = cs.AddNewTab("CuiTestTab");

var panel                = tab.AddNewPanel("Panel");

var row                  = panel.AddNewRibbonRow();

 

menuGroup.Name           = "CuiTest";

 

row.AddNewButton(

    "BMP",

    "BMP",

    "SayBMP",

    "BMP loaded from the resource DLL",

    "IDB_CIRCLE16",

    "IDB_CIRCLE32",

    RibbonButtonStyle.LargeWithText);

 

row.AddNewButton(

    "ICO",

    "ICO",

    "SayICO",

    "ICO loaded from the resource DLL",

    "IDI_TRIANGLE16",

    "IDI_TRIANGLE32",

    RibbonButtonStyle.LargeWithText);

 

var fileName = Path.Combine(debugFolder, "CuiTest.cuix");

 

File.Delete(fileName);

 

cs.SaveAs(fileName);

-

-

And here is a picture of the stunning result!

 

See attachment for the whole project:

cui resonly ico.zip

Adding a spatial filter to a block reference

By Madhukar Moogala

This blog post is minor tweak to the existing post written by my colleague Xiaodong back in 2013, with the recent development changes internally, the code flow is causing crash in ACAD 2015 -32 machines, to avoid such mishap and to have seamless code across both the machines I have re written the code.

Reason for new change in the code :

The existing code sets the filter's definition (including clip boundary) before the filter is added to the database.  That causes the wrong type of internal clip boundary object to be created.  There are two types of clip boundaries possible, one is only for use in databases that are open in the Acad editor and the other is for databases that are not open in the Acad editor. If the filter doesn't have a database, then we create the clip boundary type that is for non-editor databases. Then, if the filter is added to a database that is open in the editor, it has the wrong type of clip boundary and that causes problems.

 

static void Test_Clip ()

{

ads_point pt1, pt2;

ads_name ent;

if (acedEntSel(_T("Select xref:"), ent, pt1) != RTNORM)

return;

AcDbObjectId idXref;

if (acdbGetObjectId(idXref,ent) != Acad::eOk)

return;

AcDbObjectPointer<AcDbBlockReference> pRef(idXref, AcDb::kForRead);

if (pRef.openStatus() != Acad::eOk) {

acutPrintf(_T("Not an xref!\n"));

return;

}

AcGePoint2dArray pts;

if (acedGetPoint(NULL,_T("First point:"), pt1) != RTNORM) {

pRef->close();

return;

}

//the ECS of the vertices must be defined in the

//coordinate system of the _block_ so let's calculate

//transform all points to that coordinate system

AcGeMatrix3d mat(pRef->blockTransform());

mat.invert();

AcGePoint3d pt3d(asPnt3d(pt1));

pt3d.transformBy(mat);

pts.append(AcGePoint2d(pt3d.x, pt3d.y));

while (acedGetPoint(pt1,_T("Next point:"), pt2) == RTNORM) {

acedGrDraw(pt1, pt2, 1, 1);

pt3d = asPnt3d(pt2);

pt3d.transformBy(mat);

pts.append(AcGePoint2d(pt3d.x, pt3d.y));

memcpy(pt1, pt2, sizeof(ads_point));

}

acedRedraw(NULL,0);

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

AcGeVector3d normal;

double elev;

if (pDb->tilemode()) {

normal = pDb->ucsxdir().crossProduct(pDb->ucsydir());

elev = pDb->elevation();

} else {

normal = pDb->pucsxdir().crossProduct(pDb->pucsydir());

elev = pDb->pelevation();

}

normal.normalize();

Acad::ErrorStatus es = pRef.object()->upgradeOpen();

if (es != Acad::eOk) {

pRef->close();

return;

}

//create the filter

AcDbSpatialFilter* pFilter = new AcDbSpatialFilter;

//add it to the extension dictionary of the block reference

//the AcDbIndexFilterManger class provides convenient utility functions

if (AcDbIndexFilterManager::addFilter(pRef.object(), pFilter) != Acad::eOk)

delete pFilter;

else {

acutPrintf(_T("Filter has been succesfully added!\n"));

pRef.object()->downgradeOpen();

}

if (pFilter->setDefinition(pts,normal,elev,

ACDB_INFINITE_XCLIP_DEPTH,-ACDB_INFINITE_XCLIP_DEPTH, true) != Acad::eOk)

{

acutPrintf(L"Filter setDefinition failed.");

//remove the filter if setDefinition fails.

pFilter->erase();

 

}

es = pFilter->erase();

pFilter->close();

pRef->close();

 

}

Set or Get Lisp Symbol in .NET

By Madhukar Moogala

We are pretty much aware of pinvoke acedGetSym\acedPutSym in .NET to manipulate lisp symbols , we can avoid pinvoking with help of  SetLispSymbol and GetLispSymbol.

In the following example ,my attention is towards "how to store \retireve multiple fragements of information in lisp symbol " ,to achieve this we can use TypedValue object data type along with LispDataType enumerations as values.

 

public static void PutSymbol()

{

 

Document d = Application.DocumentManager.MdiActiveDocument;

Database db = d.Database;

// Create a list

TypedValue[] tValue = new TypedValue[7];

tValue.SetValue(new TypedValue((int)LispDataType.ListBegin), 0);

tValue.SetValue(new TypedValue((int)LispDataType.Text,

                                "Main List Item 1"), 1);

tValue.SetValue(new TypedValue((int)LispDataType.ListBegin), 2);

tValue.SetValue(new TypedValue((int)LispDataType.Text,

                                "Nested List Item 1"), 3);

tValue.SetValue(new TypedValue((int)LispDataType.Text,

                                "Nested List Item 2"), 4);

tValue.SetValue(new TypedValue((int)LispDataType.ListEnd), 5);

tValue.SetValue(new TypedValue((int)LispDataType.ListEnd), 6);

 

d.SetLispSymbol("lst", tValue);

}

 

public static void GetSymbol()

{

Document d = Application.DocumentManager.MdiActiveDocument;

Editor ed = d.Editor;

PromptResult res = ed.GetString("\nName of lisp-Symbol name: ");

if (res.Status == PromptStatus.OK)

{

    TypedValue[] tValue = (TypedValue[])d.GetLispSymbol(res.StringResult);

    if (tValue == null) return;

    foreach (TypedValue tV in tValue)

    {

        ed.WriteMessage("\n");

        ed.WriteMessage(tV.TypeCode + "," + tV.Value);

    }

 

}

 

}