topic Re: entity position deviates from the specified position while copy BlockReference by blockId in .NET Forum

entity position deviates from the specified position while copy BlockReference by blockId

lixiaohai1222 — Mon, 26 Aug 2024 11:05:01 GMT

static void CopyBlocks() { Database db = HostApplicationServices.WorkingDatabase; Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument; Editor ed = doc.Editor; var dynBlockNames = new List<string> { "block1", "block2", "block3" }; for (int i = 0; i < dynBlockNames.Count; i++) { var basePoint = new Point3d(i, i, i); ObjectId blockId; BlockReference newBr; using (Transaction trans = db.TransactionManager.StartTransaction()) { BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead); newBr = new BlockReference(basePoint, bt["blockName"]); BlockTableRecord modelSpace = trans.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(db), OpenMode.ForWrite) as BlockTableRecord; modelSpace.AppendEntity(newBr); blockId = newBr.ObjectId; trans.Commit(); } using (Transaction trans = db.TransactionManager.StartTransaction()) { for (int j = 100; j < 1000; i++) { var tp = new Point3d(j, j, j); ed.Command("_.COPY", blockId, "", basePoint, tp); } trans.Commit(); } } }

something was wrong with the specified position "tp"

Re: entity position deviates from the specified position while copy BlockReference by blockId

ActivistInvestor — Mon, 26 Aug 2024 17:31:09 GMT

something was wrong with the specified position "tp"

What was wrong with the specified position? You need to be more specific. What was the result verses what was expected result.

Running Object Snap perhaps ?

Re: entity position deviates from the specified position while copy BlockReference by blockId

lixiaohai1222 — Tue, 27 Aug 2024 07:27:14 GMT

Re: entity position deviates from the specified position while copy BlockReference by blockId

lixiaohai1222 — Tue, 27 Aug 2024 07:24:46 GMT

all the blocks specified by red arrow are also copied to wrong point

Re: entity position deviates from the specified position while copy BlockReference by blockId

_gile — Tue, 27 Aug 2024 08:15:58 GMT

Hi,

There's something weird with this line:

for (int j = 100; j < 1000; i++)

You're incrementing 'i' and 'j' is never incremented.

Re: entity position deviates from the specified position while copy BlockReference by blockId

_gile — Tue, 27 Aug 2024 09:03:45 GMT

Also, as @ActivistInvestor said, maybe something due to some running object snap. If you absolutely want to use Editor.Command, you should temporarily disable object snaps:

ed.Command("_.COPY", blockId, "", "_none", basePoint, tp);

But, instead of calling the COPY command, you could simply insert the new block references as you do for the "base" ones.

Re: entity position deviates from the specified position while copy BlockReference by blockId

lixiaohai1222 — Wed, 28 Aug 2024 01:34:43 GMT

thanks, but dynamic properties will be lost while simply insert the new block references. In addition, when using DotNetARX.BlockTools.SetDynBlockValue to modify the attribute value of the new block references, AutoCAD will leak memory.
issue: https://forums.autodesk.com/t5/net/net-plugin-causes-high-memory-consumption-leak-not-in-managed/td-p/5633915

Re: entity position deviates from the specified position while copy BlockReference by blockId

norman.yuan — Wed, 28 Aug 2024 22:52:30 GMT

Well, using Editor.Command()/using command "COPY" does not change the fact that excessive use of dynamic blocks would result in high memory consumption. If you insert the block references with its default dynamic properties with code, there would be no extra memory consumption. The increased memory is resulted in when the block reference's dynamic properties are changed (each change would lead AutoCAD to create a new BlockTableRecord and its block reference). If you have a very complicated block definition (say many entities in it and these entities could be manipulated with dozens of dynamic properties), the BlockTableRecord could be quite big in size of memory. So, each instance of the block reference with a unique dynamic property value would lead AutoCAD to create new pair of an anonymous BlockTableRecord (with similar big amount of memory required) and a block reference. You can see, if you create 100 block references of this block with each of them has unique dynamic property value, you would end up with 100 big sized anonymous BlockTablerecords plus 100 instances of BlockReferences (paired to each anonymous block definition). Therefore, using big-sized/complicated dynamic blocks excessively would cause heavy overhead for AutoCAD process.