FS#2284 - Zooming in & out causes grid/snap scale value change introducing errors.
I have set the grid/snap value to X=.0625 Y=.0625 on all 4 viewports.
When zooming in and out the grid/snap scale changes from .0625 to 3.90625. at this point the grid/snap points differ,
This causes a variation in the grid/snap reference points lending to drawing errors.
example
When I use the grid settings defaults .01, when zooming in and out, the grid/snap scaling doesn’t seem to have this issue.
Other values do, See below.
set value first zoom second zoom next zoom
point point point ...
0.01 0.1 1.0 10.0 ...
0.02 0.04 0.4 4.0 ...
0.04 0.16 1.6 16.0 ...
0.05 0.25 2.5 25.0 ...
0.0625 0.390625 3.90625 39.0625 ...
0.0254 0.64516 6.4516 64.516 ...
Why is there a squaring of the original set value? Which then becomes a new zoomed grid/snap value?
QCAD Professional
Version: 3.26.4.0 (3.26.4)
Internet: QCAD.org
Build Date: Jun 3 2021
Revision: 0bb4334
Qt Version: 5.13.2
Architecture: i386
Compiler: Unknown
Related forum topic:
https://qcad.org/rsforum/viewtopic.php?t=8761
It is not squared as explained:
0.02^2 = 0.004 vs 0.4 ; 0.0254^2 = 0.00064516 vs 0.64516
The best approximation of the first multiplication factor I could come up with is:
Grid setting in exponential notation but with the exponent set to 0
Next successive multiplication factors = 10x
Regards,
CVH
Andrew,
The user grid preference is indeed squared for all higher as the minimal.
Please refer to https://www.qcad.org/rsforum/viewtopic.php?f=33&t=10155#p41481
Regards,
CVH