How to change dash line scale

QCAD Professional QCAD 'How Do I' Questions
1

hi,

I have a drawing which is quite big. All the dashed lines in the drawings appear as solid lines. How can I change the scale of the dashed lines so that it is visible. Is there an option such as ltscale as in autocad??

Regards,

neshen

2

Please read my blog post from yesterday about this exact problem and a potential solution in the new QCAD 3.4:

LTSCALE is also available under:
Edit - Drawing Preferences - General - Linetype - Global Linetype Scale

I would only recommend to adjust LTSCALE if you wish to adjust the line pattern density for prints / in print preview. To work in model space, the new view mode can be used instead (see blog post above).

3

Awesome!!

I had this exact problem. Drawing a floor plan for a house and using mm as my base unit. All dashed lines appear as solid. For those who want to skip ahead without reading the blog;
click "view/screen based line types"

But go and check Andrews’ blog out. It explains the issue well.

~Debian Linux, QCAD V3.7.5.0 (3.7.5) Qt Version 4.8.4~

4

I know this is an old post.
Is there a way to create a custom line / dash type parametrically?

In other words, rather than an “ISO Long Dash Short” the ability to paint a line with
a given pattern, or build a line in drawing units (e.g. “20 1 10 1"” for
long dash, dot, short dash, dot).

The screen based view mode would still apply. The actual dash would be in drawing units.

5

@iOne_iTwo

Yes, you can define custom Linetypes yourself.
But not parametric in the sense of being changeable via properties or so.

“20 1 10 1" is too little info, you must also specify the length of the spaces.
A positive value is a dash, zero is a dot and a negative value is a space in between dashes/dots.
Up to 12 values and always an even count of dashes and/or dots + spaces.
The pattern is always auto-aligned (Type A), which guarantees that the endpoints of lines and arcs start and stop with a (trimmed) dash.
The 47 or 80-character limit does not apply for QCAD.
(But it may apply for a recipient as used types are stored in a DXF file)

There are two ways to implement them.
Or you extend the default set of Linetypes in qcadiso.lin (metric) or qcad.lin (imperial)
Or you define them in an additional *.lin file.
See your QCAD installation folder under the folder ‘linetypes’.

Note that the first method may be overwritten by an update or re-installation.

There is plenty of online info about this.
e.g. : Help

Also note that Screen-based Linetypes is a pixel based hybrid system and that it is not assured that a dash or space is N.NN units long in any zoom state.
With NL off it will be N.NN mm (inch) long in Model-Space times the weight if that applies.
Linetypes or the patterns scale with paper scale and by Application Preference also with the pen size.
At some point QCAD will render entities with many dashes as continuously, also see preferences.

And finally: Common line-art is represented with a round end.
Seemingly making a dash 1 pen size longer.

Regards,
CVH