QCAD.org Forum

We are evaluating QCAD to use it for converting DWG files to PNG. Currently we use Windows based ACME Cad Converter + WINE in a Linux environment.

However, we have some problems converting images sometimes.
When I open DWG files in QCAD, I see many error messages like these: Sometimes the lines in the drawing are not fully drawn in or have the wrong weight as compared with other tools.
Converting the file to PNG also has similar problem with line weight.
I used this command: Included are screenshots and conversion comparison between ACME CAD Converter and QCAD.

I tested this same issue back in October 2016 and saw the same problem. If you can resolve this issue, we are likely to purchase QCAD.

QCAD Professional Trial Version: 3.17.2.0 (3.17.2)
OS: Linux Mint 17.3 Rosa
Supporting files are attached.

skatea2015 wrote:When I open DWG files in QCAD, I see many error messages like these:

Code: Select all

Unsupported XData type NOT imported: 1010
Unsupported XData type NOT imported: 1011

QCAD does not support all types of available XData (additional, typically non-standard data attached to objects). In most cases, you can simply ignore those messages.

skatea2015 wrote:Sometimes the lines in the drawing are not fully drawn in or have the wrong weight as compared with other tools.

If you are referring to those blue lines at various angles, these are polylines with a custom lineweight set to 0.23 drawing units. Since the whole drawing is about 7000 drawing units wide, 0.23 drawing units is indeed extremely thin (barely visible or not visible at all in a bitmap / on screen).

Perhaps adding a minimum line weight command line switch would serve you best? Can you confirm this?

Ok, I see what you are saying about the polyline thickness...they are very thin relative to the size of the drawing.
My guess is that ACME CAD Converter has some minimum line thickness that it will use instead, which is why we do not have a problem there.
It would be very helpful to have the capability to set a minimum polyline width in QCAD.

QCAD 3.17.3 is now available with an updated dwg2bmp tool with a -plwidth switch:
The -plwidth switch takes a number in pixels to be used as a minimum width for polylines with a custom width.