Hi Antonio and Olivier,
I will comment below.
Olivier, thanks for the move.
Am 26.01.2014 06:05, schrieb Antonio Locandro:
Hi Oliver, thanks for copying me in this email
Let me tell you that I have installed your prototype and tested it. I do
think something like this is needed and I do like the fact that it works
with other tools directly. I like the fact it gives you guidelines of
what it will do like in CAD software. I think it would be nice to add
also the possibility to use right clicks for actions
I have not tried your plugin but watched the video. Looking at defining
an angle it should be definable relative to a) the last segment b) North
c) another (helper) point
To address your points
1) yes this feature is needed in QGIS, other COTS software have this
functionality as Advanced Editing and I do rely heavily daily on this
type of things for my job and is amongst several reasons why we cant
switch for QGIS. I know the main user base of QGIS probably use it only
for analysis but for some of us we need to digitize precisely
coordinates based on field data or to create specific features.
would be useful here, too
Although I think most CAD functions for which currently nothing similar
is available in QGIS are for construction I still think, it would be
great to have them. (Of course not those to create 3D screws :)
I would vote to keep to make it part of core as Advanced Tools or
something, I also think it would be quite nice to merge the different
CAD-like tools into one and have all this contributors who made this
individual plugins work as a team. Resources are not always available
and to join forces to me seems a better approach
The digitizingTools plugin is trying a similar approach, namely to
combine efforts and present _one_ plugin.
2) I would leave that for developers
3) I cant code, at least I am not at that level. I am just learning
python and it might take some time to achieve a level to make something
useful. I can however test the plugin and suggest features. I think the
best way is to add issues in the github repository of bugs, improvements
etc.
I am working more or less continuely on digitzingTools (if need arises).
I can support in Python coding.
4) Some ideas to start with, I will add them to github so you have them
there also. I understand it is a prototype to see if it gathers traction
but I feel it will
- snap to midpoint (snapping options to behave like in CAD software)
more easy control over snapping in general: currently snapping has to be
set for each individual layer seperately: switch snapping on/off
completely, set snapping behaviour for all layers at once (segment,
node), additional snapping options needed: snap to middle of line, snap
perpendicularly
- Add trim line
+1
trim two lines so they form a corner
- Add extend line
digitizingTools already offers continuing digitizing of a line (though
not CAD like in prolonging the line in the direction of its last segment)
would be great to extend several lines until they meet
- Add ability to create arcs e.g. Tan Tan Radius; select center and add
radius
question would be how this is to be stored in GIS format
- general: provide a means to move the map while any digitizing tool is
active. possible solutions
a) shift/ctrl + drag
b) add scrollbars (looks arkward but users at once know what to do)
my 2cts
regards
Bernhard
- Add the ability to draw by deflection angle apart from perpendicular
and parallel
- Maybe add the possibility to add x,y in DMS, DM, DD when working in WGS84
- The plugin already adds the function to calculate within fields. I
think one useful thing in length is that by default it is m (or the epsg
default unit I guess ft might be for some) and that you can add
different units by adding the appropriate abbreviation like in other
COTS e.g.
18 ft
1 NM
1 SM
------------------------------------------------------------------------
From: olivier.dal...@gmail.com
Date: Sun, 26 Jan 2014 03:08:27 +0100
Subject: Cad-Input for QGIS prototype
To: qgis-developer@lists.osgeo.org
CC: diego.gn...@gmail.com; stefan.zieg...@bd.so.ch;
bernhard.stro...@jena.de; antoniolocan...@hotmail.com
Dear list,
Some times ago, on this list, we discussed[1] about real CAD-like input
for QGIS, and since I do myself long for such a feature very much, I'd
like to reopen that discussion by *proposing a python prototype*.
I know there are already a few plugins aiming in that direction
(CadTools, ImprovedPolygonCapturing, NumericalInput and a few other).
They provide the functionality, but not the ease of use you can find in
CAD packages.
One key aspect is that they are all specific tools, and do not work with
other tools directly.
The prototype is inspired from Archicad's input method which allows to
combine numeric input with mouse input in a very efficient and flexible
manner, to get the best of both.
It is currently very raw and not well tested at all... It also relies on
a lot of dirty hacks, since the python API is not well suited for this
type of plugins (have a look at the README on the github page for more
details).
*DEMO (video) : https://vimeo.com/85052231*
*GITHUB (readme, download...) : https://github.com/olivierdalang/CadInput*
Please, tell me what you think :
1) Concept
- Does this kind of input seem interesting to you ?
- How does it fit in a GIS-environment ? Since it comes from a CAD
environment, maybe it's more suited to designing than digitizing.
2) API/Core modifications (read
https://github.com/olivierdalang/CadInput#technical-notes )
- How do you see the suggested improvements ? Are they feasible ?
- Does developing this as a python plugin make sense, or does it have to
be in the core from the start ? (I'm not familiar with core developing)
3) Collaboration...
- Is anyone of you currently working on the same topic ?
- Would anyone have some time/interest in collaborating on this feature ?
4) Other ideas are welcome !
Thanks for your attention,
Olivier
[1]:
http://osgeo-org.1560.x6.nabble.com/Make-QGIS-interact-with-LibreCAD-td5048565.html
(To those from this discussion I cc'ed, I though you may be interested,
I hope you don't mind)
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