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*R, Paul
Message 1 of 3 (185 Views)

Quickcad 7 and .dwg file compatibility issues?

185 Views, 2 Replies
02-15-2000 10:05 AM
This is a followup to my previous post concerning the improper handling of
curves during the import/export of .dwg files in Quickcad 6. Just a
recap-QC6 doesn't import curves in R14 .dwg files at all and when you export
curves from a QC6 file to .dwg it changes those curves to polylines. There
are a few other .dwg files that just don't open. Overall it's really pretty
good but just not quite good enough.

My company just switched from Microstation to Autocad 2000 (full version).
We have several remote field engineers spread all over the US and we need a
cost effective 2D cad program that will import/export .dwg files without or
entity loss or other anomolies. Cost is an issue with Autocad Lt so I'm
considering Quickcad 7 but the problems with Quickcad 6 and it's imperfect
handling of .dwg files causes me some concern. Our company has decided that
no programs that will induce any sort of translational errors into .dwg
files will be used. Right now they are open to the idea of using alternative
Autodesk products as long as the importing/exporting of dwg files into these
packages don't cause errors or change entity properties.

On page 316 of the Quickcad 6 manual there is a table detailing how the
different entities are exported/imported to .dwg. Does such a table exist in
the Quickcad 7 manual? Perhaps if we can avoid the types of entited that
might cause conversion problems we can still use Quickcad 7. I guess it
would depend on just what entities would be affected.

What about Autosketch? Would that be a better option than Quickcad 7?

Thanks
*Support], Keith Sibbert [Autodesk
Message 2 of 3 (185 Views)

Re: Quickcad 7 and .dwg file compatibility issues?

02-15-2000 10:41 PM in reply to: *R, Paul
The information is no longer in the printed manual but is contained in the Help
file and reads as follows:

Entity conversions

From AutoCAD Into QuickCAD
3D face irregular polygon
arc arc
circle circle
dimension dimension (Range and +/- tolerancing only)
ellipse ellipse
group group
hatch group
block symbol (see Symbol Note)
leader polyline/curve and optional marker
line line
Minsert grouped, multiple symbols
Mline grouped lines (endcaps and fills are lost)

Mtext text
point point marker
polyline (2D) and
lwpoline polyline, spline curve, or fitted curve
polyline (3D) polyline or fitted curve
ray Line (drawn 10 units in one direction
from the basepoint)
solid filled irregular polygon
spline spline curve
text text (see Text Note)
trace segment filled irregular polygon
x-line Line (drawn 10 units in either direction
from the basepoint)

Notes

Paper space is ignored when importing AutoCAD drawings which utilize model
space. If no entities exist in model space, QuickCAD will translate all entities
from paper space.
QuickCAD automatically performs an autofit operation when importing AutoCAD
files. This may result in a repositioning of the drawing origin.
Layer information within a block is lost on import into QuickCAD. Entities
within a QuickCAD symbol are placed on the same layer as the symbol instance. It
is suggested that you explode blocks before import to maintain best visual
integrity.

ATTDEFs are converted to fields with the field name from the Tag applied. A
formula is inserted at the location of the ATTDEF in the form of
<%db("TAGNAME")> if the ATTDEF is visible. When an instance of a block which
contains an ATTDEF is placed, the attribute is forced to the default position.
Custom position of attributes within an instance is not supported.
Only line styles that are already defined in QuickCAD can be imported. All
standard AutoCAD line styles are included in QuickCAD Release 7, however custom
line styles must be added manually. Complex lines styles are ignored and mapped
to solid. For information on creating custom styles in QuickCAD see Creating
Custom Pen Styles.

Hatches are imported as polygons with hidden edges and a fill pattern that
corresponds to the hatch pattern. If QuickCAD does not have a hatch pattern that
matches the AutoCAD pattern, the hatch is broken into groups of individual lines
and/or point markers. QuickCAD has no by-layer fills, so when importing an
entity from AutoCAD that contains a solid hatch with by-layer fill, it assigns
the entity's layer pen color to the fill. By-block fills are not supported and
become black. Associative hatches loose their associations.

When you import DXF or DWG files, QuickCAD ignores most objects it does not
recognize (that is, objects that have no equivalent in QuickCAD). However, in
the case of 3-dimensional objects, QuickCAD also gives you the option to
"flatten" 3D objects. When a 3D object is flattened, it is first translated into
facets which, in turn, are translated into 2-dimensional polygons.

AutoCAD entity QuickCAD Import Options
3D Solid flattened or ignored
Body flattened or ignored
Feature control frames ignored
OLEframes ignored
Region flattened or ignored
PolyFaceMesh flattened or ignored
PolygonMesh flattened or ignored
Proxy ignored
Viewport ignored
Shape ignored
Raster image ignored
Similarly, custom application objects, elevation, extrusion direction,
thickness, XDATA, and XRECORDS are ignored on import.
The Import Options dialog box, which is only available when importing a DWG or
DXF file, allows you some control of the way QuickCAD imports AutoCAD drawings.
The Import Options dialog box allows you to assign a default measurement system
to the existing units in an AutoCAD drawing. For instance, you can assign a
value of 1 inch to each unit in an AutoCAD drawing. The Import Options dialog
box also allows you to control whether some 3D entities imported from AutoCAD
are flattened or ignored (see table above).

Copyright 1999 Autodesk, Inc.

--
Keith Sibbert
PSG Product Support, Americas
WW Support & Services, Autodesk
Discussion Q&A: http://www.autodesk.com/discussion

Paul R wrote:

> This is a followup to my previous post concerning the improper handling of
> curves during the import/export of .dwg files in Quickcad 6. Just a
> recap-QC6 doesn't import curves in R14 .dwg files at all and when you export
> curves from a QC6 file to .dwg it changes those curves to polylines. There
> are a few other .dwg files that just don't open. Overall it's really pretty
> good but just not quite good enough.
>
> My company just switched from Microstation to Autocad 2000 (full version).
> We have several remote field engineers spread all over the US and we need a
> cost effective 2D cad program that will import/export .dwg files without or
> entity loss or other anomolies. Cost is an issue with Autocad Lt so I'm
> considering Quickcad 7 but the problems with Quickcad 6 and it's imperfect
> handling of .dwg files causes me some concern. Our company has decided that
> no programs that will induce any sort of translational errors into .dwg
> files will be used. Right now they are open to the idea of using alternative
> Autodesk products as long as the importing/exporting of dwg files into these
> packages don't cause errors or change entity properties.
>
> On page 316 of the Quickcad 6 manual there is a table detailing how the
> different entities are exported/imported to .dwg. Does such a table exist in
> the Quickcad 7 manual? Perhaps if we can avoid the types of entited that
> might cause conversion problems we can still use Quickcad 7. I guess it
> would depend on just what entities would be affected.
>
> What about Autosketch? Would that be a better option than Quickcad 7?
>
> Thanks
*R, Paul
Message 3 of 3 (185 Views)

Thank you

02-16-2000 04:48 AM in reply to: *R, Paul
I will submit this information to our drafting engineers and let them mull
it over. I appreciate the quick response.

Paul
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