topic Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr in ObjectARX Forum

Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirror,

7598165 — Thu, 14 May 2020 14:15:50 GMT

Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirror, how to display AcDbText correctly?

mirrtext=0

thanks.

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

tbrammer — Tue, 19 May 2020 14:10:49 GMT

I'm not sure what you need exactly. Maybe this code helps:

void FlipText() { ads_point pt; ads_name ent; AcDbObjectId objId; if (acedEntSel(_T("\nSelect text"), ent, pt) != RTNORM) return; if (acdbGetObjectId(objId, ent) != Acad::eOk) return; // Get the current viewdir struct resbuf var; acedGetVar(_T("VIEWDIR"), &var); AcGeVector3d viewdir; acdbUcs2Wcs(var.resval.rpoint, asDblArray(viewdir), true); Acad::ErrorStatus es; AcDbText *text; if ((es = acdbOpenObject(text, objId, AcDb::kForRead)) == Acad::eOk) { AcGeVector3d normal(text->normal()); double dp = normal.dotProduct(viewdir); if (dp < 0.0) // if <0 we look at the text from the wrong side. Flip it. { es = text->upgradeOpen(); if (!es) { // Flip the normal but keep the insertion/aligment point AcDb::TextHorzMode h = text->horizontalMode(); AcDb::TextVertMode v = text->verticalMode(); bool bUsePos=((h==AcDb::kTextLeft)&&(v==AcDb::kTextBase)); AcGePoint3d pt(bUsePos? text->position() : text->alignmentPoint()); text->setNormal(-normal); // flip the normal if (bUsePos) es = text->setPosition(pt); else es = text->setAlignmentPoint(pt); } } text->close(); } }

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

7598165 — Wed, 20 May 2020 00:39:30 GMT

Thank you! What I want is not the final text result after dragging, but the effect that the text correctly reflects when dragging in AcGeJig.Can you Help me ?

Can you help me? Thanks again! !

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

tbrammer — Wed, 20 May 2020 07:22:25 GMT

Is the AcDbText your jig->entity()? Then I would assume that have have to make sure that it's normal points along the viewing direction while dragging. This is what my code sample shows.

Could you post sample code that allows me to understand and reproduce your problem?

Note: AcDbText also has these methods:

Adesk::Boolean isMirroredInX() const;
Acad::ErrorStatus mirrorInX(Adesk::Boolean);
Adesk::Boolean isMirroredInY() const;
Acad::ErrorStatus mirrorInY(Adesk::Boolean);

But they don't take the current viewing direction into account.

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

7598165 — Sun, 24 May 2020 15:54:30 GMT

virtual Adesk::Boolean subWorldDraw(AcGiWorldDraw* wd) { wd->geometry().pushModelTransform(m_mat); AcDbEntity* pE; AcDbRotatedDimension* pDim; for (int i = 0; i < m_idArray.length(); i++) { if (acdbOpenObject(pE, m_idArray[i], AcDb::kForRead) == Acad::eOk) { /////////////////////////////////////////////////////////////////////////// // see if the entity is a block reference, if so then check for any attributes so we don't display the // definitions AcDbBlockReference* pBlockref = AcDbBlockReference::cast(pE); // if it is a block reference if (pBlockref != NULL) { // create an attribute iterator so we can check to see if any attribute asre attached AcDbObjectIterator* pAttributeIterator = pBlockref->attributeIterator(); // if it allocated ok if (pAttributeIterator != NULL) { AcDbObjectId ObjId; AcDbAttribute* pAttribute = NULL; // now loop through them int count; for (count = 0; !pAttributeIterator->done(); pAttributeIterator->step(), ++count) { // get the object id of the attribute ObjId = pAttributeIterator->objectId(); // open the object so we can draw it if (acdbOpenObject(pAttribute, ObjId, AcDb::kForRead) != Acad::eOk) continue; // now draw it wd->geometry().draw(pAttribute); // now close the attribute pAttribute->close(); } // delete the iterator delete pAttributeIterator; // see if we have any attributes attached to this block // if we have then to stop the attribute definitions being drawn if (count) { AcDbVoidPtrArray entitySet; // explode and get some temporary entities Acad::ErrorStatus es = pBlockref->explode(entitySet); // if it worked ok if (es == Acad::eOk) { // loop round getting the intersection points for (long i = 0l; i < entitySet.length(); ++i) { // get a pointer to the entity object AcDbEntity* pNewEnt = (AcDbEntity*)entitySet.at(i); AcDbAttributeDefinition* pAttributeDef = AcDbAttributeDefinition::cast(pNewEnt); // if it is NOT an attribute definition if (pAttributeDef == NULL) { // then draw it wd->geometry().draw(pNewEnt); } // delete the temporary entity delete pNewEnt; } } } // no attributes - just draw else { wd->geometry().draw(pE); } } // failed attribute iterator - just draw it else { wd->geometry().draw(pE); } } if (!DocVars.Xd_Kernel.pCurDwg->mirrtext() && (XdGeUtils::IsMirrorMatrix(m_mat))) { /////////////////////////////////////////// if (pE->isKindOf(AcDbText::desc())) { wd->geometry().draw(pE); //how } else if (pE->isKindOf(AcDbMText::desc())) { wd->geometry().draw(pE); //how } } // not a block reference - just draw then else { wd->geometry().draw(pE); } pE->close(); } } wd->geometry().popModelTransform(); return Adesk::kTrue; }

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

tbrammer — Tue, 26 May 2020 08:18:29 GMT

I would try something like this:

AcDbText *text = AcDbText::cast(pE); AcGePoint3d pos(text->position()); // this is the point that will stay fixed AcGeVector3d zAxis(text->normal); AcGeVector3d xAxis = zAxis.perpVector().rotateBy(text->rotation(), zAxis); AcGeVector3d yAxis = zAxis.crossProduct(xAxis); AcGeMatrix3d mirrMat; mirrMat.setToAlignCoordSys( pos, xAxis, yAxis, zAxis, pos, -xAxis, yAxis, zAxis // -xAxis to flip the X direction. ); wd->geometry().pushModelTransform(mirrMat); wd->geometry().draw(pE); wd->geometry().popModelTransform();

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

7598165 — Thu, 28 May 2020 03:03:51 GMT

Thank you, according to your code, it was partially successful, but in a certain state, the display is not correct, can you solve it when the following picture is shown?

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

tbrammer — Thu, 28 May 2020 07:20:44 GMT

Sorry, I don't see what you mean.

I've seen the video and the screenshot. The text is rotated but not mirrored.

So what's wrong? How would you expect the text to look like?

The only prolems I notices are:

the text appears mirrored right in the moment when you start rotating.
during the rotation the text has an additional offset to the left (about the width of 'ab').

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

7598165 — Thu, 28 May 2020 09:42:08 GMT

Animation of the AutoCAD mirror command

AcEdJig uses your code, the effect is as follows：

When the XDir angle of the AcDbText object is between -pi / 2 and pi / 2, the text is not displayed correctly.

virtual Adesk::Boolean subWorldDraw(AcGiWorldDraw* wd) { wd->geometry().pushModelTransform(m_mat); AcDbEntity* pE; for (int i = 0; i < m_idArray.length(); i++) { if (acdbOpenObject(pE, m_idArray[i], AcDb::kForRead) == Acad::eOk) { if (pE->isKindOf(AcDbText::desc())) { if (!DocVars.Xd_Kernel.pCurDwg->mirrtext()) { AcGePoint3d ori1; AcGeVector3d xAxis1, yAxis1, zAxis1; AcDbText* text = AcDbText::cast(pE); AcGePoint3d pos(text->position()); // this is the point that will stay fixed AcGeVector3d zAxis(text->normal()); AcGeVector3d xAxis = zAxis.perpVector().rotateBy(text->rotation(), zAxis); AcGeVector3d yAxis = zAxis.crossProduct(xAxis); AcGePoint3dArray box; XdDbUtils::getEntityBoundaryBox(pE, box); AcGePoint3d pMid = XdGeUtils::midPoint(box.first(), box[2]); AcGeMatrix3d mirrMat; mirrMat.setToAlignCoordSys( pMid, xAxis, yAxis, zAxis, pMid, -xAxis, yAxis, zAxis // -xAxis to flip the X direction. ); wd->geometry().pushModelTransform(mirrMat); wd->geometry().draw(pE); } else { DocVars.mMirrorResultMatrix = m_mat; wd->geometry().draw(pE); } } else { wd->geometry().draw(pE); } pE->close(); } } wd->geometry().popModelTransform(); return Adesk::kTrue; }

Re: Regarding the use of AcEdJig class, when AcDbText is being dragged as a mirr

tbrammer — Thu, 28 May 2020 12:00:57 GMT

In the new animation I see what you mean . If the text is rotated by 90°-270° you would expect it to appear "upside down" but instead it is rotated by additional 180° so that it remains readable. Right?

I don't think it is related to my mirror-flip code.

I think the text is drawn with one of the two AcGiGeometry::text(..) methods. One passes an AcGiTextStyle and the second one doesn't. It uses a built in style "STANDARD".

AcGiTextStyle has the methods setUpsideDown(bool) and bool isUpsideDown(). As far as I understand the text will

never be drawn upside down if isUpsideDown()==false.