topic Re: Dynamic Block not placing at user selected point but offset from selected point in .NET Forum

Dynamic Block not placing at user selected point but offset from selected point

kmkxperia — Sat, 03 Jun 2023 04:28:54 GMT

I have below code which simply uses user selected point place the Dynamic Block. Now the issue I have is when I run this code it works fine on new drawing. but when I try this on one of my clients template drawing it is always offset from user selected point. Issue is only when I try to place the block using below code, but when I place Manually it works fine. Not sure it is template issue, Dynamic Block or code.
Also Attached the Dynamic Block dwg file that I am using

[CommandMethod("MyDynamicBlock")]
public static void PlaceDynamicBlock()
{
// Get the current document and database
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;

// Prompt the user to select a point for insertion
PromptPointOptions ppo = new PromptPointOptions("\nSpecify insertion point for the dynamic block: ");
PromptPointResult ppr = ed.GetPoint(ppo);
ed.WriteMessage("Point selected is : " + ppr.ToString());
if (ppr.Status != PromptStatus.OK)
return;

Point3d insertionPoint = ppr.Value;

// Prompt the user to select a dynamic block reference
PromptEntityResult per = ed.GetEntity("\nSelect a dynamic block reference: ");
if (per.Status != PromptStatus.OK)
return;

// Get the selected entity (dynamic block reference)
using (Transaction trans = db.TransactionManager.StartTransaction())
{
BlockReference blockRef = trans.GetObject(per.ObjectId, OpenMode.ForWrite) as BlockReference;

// Clone the dynamic block reference at the specified insertion point
BlockReference newBlockRef = blockRef.Clone() as BlockReference;
newBlockRef.Position = insertionPoint;

// Add the new block reference to the current space
BlockTableRecord currentSpace = trans.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
currentSpace.AppendEntity(newBlockRef);
trans.AddNewlyCreatedDBObject(newBlockRef, true);

// Update the attribute values of the new block reference
foreach (ObjectId attId in blockRef.AttributeCollection)
{
AttributeReference attRef = trans.GetObject(attId, OpenMode.ForRead) as AttributeReference;
AttributeReference newAttRef = attRef.Clone() as AttributeReference;

// Update the attribute reference's position based on the new block reference
Matrix3d transform = newBlockRef.BlockTransform.Inverse() * blockRef.BlockTransform;
Point3d transformedPosition = attRef.Position.TransformBy(transform);

newAttRef.Position = newBlockRef.Position + (transformedPosition - blockRef.Position);

// Add the new attribute reference to the new block reference
newBlockRef.AttributeCollection.AppendAttribute(newAttRef);
trans.AddNewlyCreatedDBObject(newAttRef, true);
}

// Commit the transaction
trans.Commit();

// Display a message to the user
ed.WriteMessage("\nDynamic block placed with attributes.");
}
}
}

Re: Dynamic Block not placing at user selected point but offset from selected point

_gile — Sat, 03 Jun 2023 05:18:08 GMT

Hi,

May be a User Cooordinate System issue.

Try replacing:

Point3d insertionPoint = ppr.Value;

with:

Point3d insertionPoint = ppr.Value.TransformBy(ed.CurrentUserCoordinateSystem);

Re: Dynamic Block not placing at user selected point but offset from selected point

kmkxperia — Sat, 03 Jun 2023 05:33:33 GMT

Thanks This worked for me.

Re: Dynamic Block not placing at user selected point but offset from selected point

_gile — Sat, 03 Jun 2023 05:51:41 GMT

You should use DeepCloneObjects instead so that also the attribute references are cloned.

[CommandMethod("COPYBLOCK")] public static void CopyBlockReference() { // Get the current document and database var doc = Application.DocumentManager.MdiActiveDocument; var db = doc.Database; var ed = doc.Editor; // Prompt the user to select a block reference var peo = new PromptEntityOptions("\nSelect block reference: "); peo.SetRejectMessage("\nSelected object is no a block reference."); peo.AddAllowedClass(typeof(BlockReference), true); var per = ed.GetEntity(peo); if (per.Status != PromptStatus.OK) return; var sourceId = per.ObjectId; // Prompt the user to select a point for insertion var ppr = ed.GetPoint("\nSpecify insertion point: "); if (ppr.Status != PromptStatus.OK) return; var insertionPoint = ppr.Value.TransformBy(ed.CurrentUserCoordinateSystem); // Deep clone the selected block reference var ids = new ObjectIdCollection { per.ObjectId }; var mapping = new IdMapping(); db.DeepCloneObjects(ids, db.CurrentSpaceId, mapping, false); // Move the copy to the specified insertion point using (var tr = db.TransactionManager.StartTransaction()) { var br = (BlockReference)tr.GetObject(mapping[sourceId].Value, OpenMode.ForWrite); br.TransformBy(Matrix3d.Displacement(br.Position.GetVectorTo(insertionPoint))); tr.Commit(); } }