Hi Aleander,
here's a simple example for a POLYLINE entity which always crashes the
viewer. BLOCK could be interesting for grouping...
Greets,
Patrik
Alexander Rettig wrote:
Hi Dirk, Hi Sandra,
Dirk is right in that currently the DXF Loader just supports a very
few entitiy types as it was started to read special archaeological
data. Currently only the geometries POLYLINE and LINE are supported
and partly the structural entities BLOCK and LAYER, some more element
types are understood but simply ignored, since I didn't see a obvious
mapping to OpenSG structures (I'm not a DXF specialist, I have to
admit). I'd be very interested in opinions about this mapping and
suggest to start some discussion on the OpenSG-Wiki (what do you think
about that, Dirk?).
Thus see the current DXF loader as an starting point, not as a
solution please, and participate ;-)
To make the latter possible, I have to check the documentation (there
is some doxygen documentation for the DXF loader already) and make
things more clear most likely (comments welcome!). Unfortunately I
will be on vacation for two weeks from now on, I won't be able to do
it before.
Alex
> Hi Sandra,
>
> On Wed, 2004-08-18 at 08:02, Sandra Helsper wrote:
>
>> Hi
>>
>> I have a problem with dxf files. I use SceneFileHandler::the().read to
>> load the files. But all it returns is an empty scene. I have tested
>> several files with the same result. They are quiet different. They
>> contain 2D as well as 3D information and also different element types.
>>
>> An example file is available
>> http://www.graphix.de/dxfFile/vermasch_50.dxf
>> And also an screenshot how it should look like
>> http://www.graphix.de/dxfFile/dxfsurface.jpg
>> It is a 3D file and includes only LINE Elements.
>>
>> I have also other files where the import is partly successful,
means not
>> all of the elements are loaded, but some of them. So how far is the
dxf
>> import implemented? Which elements are supported?
>> I'm grateful for all information.
> The DXF loader was written for a specific project that deals with
> archeology data, and therefore is probably not anywhere near complete.
> Which is a pretty hard goal for DXF anyway, as it has so many
> different
> elements with varying interpretations. Looking at the source, I think
> these are the understood tags:
> APPID
> BLOCK
> BLOCK_RECORD
> BLOCKS
> DIMSTYLE
> ENTITIES
> HEADER
> INSERT
> LAYER
> LINE
> LTYPE
> POLYLINE
> STYLE
> TABLES
> UCS
> VERTEX
> VIEW
> VPORT
> I have no idea how complete the support for the different variants of
> these is, though.
> It was written with extensibility in mind, so it shouldn't be a big
> problem to add support for new ones, but I don't have a good
> description
> of how to do that. Alex, can you write a short intro on what to derive
> from and what to override for a new tag?
> Thanks
> Dirk
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