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Thread: Blocks won't turn off

  1. #11
    Certifiable AUGI Addict dzatto's Avatar
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    Default Re: Blocks won't turn off

    Quote Originally Posted by ameador View Post
    I think what arshiel88 is saying is that xrefs act like blocks b/c they can be controlled by whatever layer to insert them on if it is not the "0" layer.

    Aka if you have "A-Anno-Note" layer set as current when you xref in a dwg (either overlay or attach) that xref will then "disappear" when A-Anno-Note layer is frozen.
    Well, yeah. Same thing happens when it's on any layer, including 0.

  2. #12
    All AUGI, all the time arshiel88's Avatar
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    Default Re: Blocks won't turn off

    Quote Originally Posted by dzatto View Post
    They are? In what way? I thought Xref's were Xref's and blocks were blocks. Unless you bind an Xref, then yes, it is converted to a block and inserted in the drawing.
    Attach an xref, and insert a block. List the properties one by one and you will find out that all of them lists as BLOCK REFERENCE. The only difference is that the xref has the "External Reference" after its block name. But still they are both Block Reference.

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    Certifiable AUGI Addict ccowgill's Avatar
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    Default Re: Blocks won't turn off

    Quote Originally Posted by arshiel88 View Post
    Attach an xref, and insert a block. List the properties one by one and you will find out that all of them lists as BLOCK REFERENCE. The only difference is that the xref has the "External Reference" after its block name. But still they are both Block Reference.
    That may be the case, but layers are not handled the same in an xref as they are in a block. The layers in a block are assumed as normal layers in a drawing. Layers in an Xref appear as XREF|Layer, and therefore are treated separately. Yes, you still need to watch the layer it is inserted on, but the layers inside can be any name because they are kept separate from the current drawing. Our standard is to insert all Xrefs on the XREF layer.

  4. #14
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    Default Re: Blocks won't turn off

    A "BLOCK" is simply a collection of entities put into a package with a name. That's why XREFs and BLOCKs are basically the same. I have the worst time trying to explain to co-workers that when you WBLOCK (write block) something out of a drawing, the written BLOCK is just another DWG file that can be opened and edited. They always say "I thought I was creating a block, not a drawing file".

    Technically, a DWG file is a block also. Ever notice when you create a block INSIDE of a drawing with a couple of entities in it on layer 0 and then write that block (as a block) out to a drawing file, it keeps the current layer at the time the block was written to DWG inside the new DWG file? Even though there are no entities on that layer?

    Regardless, we use layer 0 in our blocks also but only for symbol blocks. Larger blocks that aren't necessarily xrefs (Building footprints, etc.) have all kinds of layers and linework in them and the process works great for us.

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