topic Re: Creating an object from 2d drawing in Libraries & objects

Creating an object from 2d drawing

Anonymous — Tue, 02 Dec 2008 18:09:42 GMT

I wanna create an object using only their 2d representation from a dwg drawings.
when i use it in floor plan and 3d views it shows the 2d representation and when seeing from the cut and elevation view it show the elevation block.
no scripts or parametric, just the drawings.
I tried on the images of the gdl master but it is only the representation, not the block actually...
how can i do this??
Thanks guys !

Re: Creating an object from 2d drawing

Karl Ottenstein — Tue, 02 Dec 2008 18:25:34 GMT

fabricfo wrote:
no scripts or parametric, just the drawings.

It requires some script - but a very small bit.

The GDL symbol window supports 16 'fragments', which are much like layers. You can place the (graphic) plan symbol in one fragment and the elevation symbol in another. The 2D script then queries what view it is in (plan or elevation) and displays the appropriate fragment.

You can see part of this (multiple views, each in a different fragment), but examinging the 2D Symbol window of any of the objects in the Vehicle Symbols 12 library folder, and turning on fragments 1, 2 or 3 (little square pushbuttons) in turn. For example, Car Elev 01 12 is shown here. It has a top, side, front and rear view, but is just a 2d symbol, not a model.

Someone else may have an example to share...

Cheers,
Karl

Re: Creating an object from 2d drawing

Karl Ottenstein — Tue, 02 Dec 2008 18:35:14 GMT

The symbol illustrated (and others in that folder) have a parameter to let the user choose which symbol (top, side, etc) should appear. In your case with the tree - top or side only - the choice could be automated in the script using the GLOB_CONTEXT global variable defined on page 227 of the GDL manual:

GDL wrote:
GLOB_CONTEXT context of appearance
1-library part editor, 2-floor plan, 3-3D view, 4-section/elevation, 5-settings dialog, 6-list, 7 - detail drawing, 8 - layout, 22 - editing feedback mode from the floor plan, 23 - editing
feedback mode from a 3Dview, 24 - editing feedback mode from a section/elevation, 28 - editing feedback mode from a layout, 43 - generating as an operator from a 3D view, 44 -
generating as an operator from a section/elevation, 46 - generating as an operator from a list

Then, the simple 2D script would be something like this:

if GLOB_CONTEXT=4 then ! show elev view in section or elevation
    fragment2 1, 1
else ! show plan symbol for all other views
    fragment2, 2, 1
endif

Karl

Re: Creating an object from 2d drawing

Anonymous — Tue, 02 Dec 2008 18:41:36 GMT

Thanks a lot Karl,
I will try to make it and them I put it here

Re: Creating an object from 2d drawing

Karl Ottenstein — Tue, 02 Dec 2008 18:43:24 GMT

You're welcome... but I just noticed that you wanted to see the sketch in a 3D view also. To do that, you'll need a jpeg (etc) of it and use the parapicture object that Dwight talks about in various threads. He has uploaded it to the GDL Depository.

Cheers,
Karl

Re: Creating an object from 2d drawing

Anonymous — Wed, 03 Dec 2008 11:55:41 GMT

Hello,

You can open the 2D-DWG as an object;
Archive...-> Libraries & objects...-> Open object...

This creates an GDL-object where the DWG 2D-lines visible in the 3D-view too. The lines are
lying on the XY-plane, but with the "rotx 90"-command the drawing wireframe is rotated
vertical to the XZ-plane.

Hope this makes sense.

--
Regards, Juha

Re: Creating an object from 2d drawing

Karl Ottenstein — Wed, 03 Dec 2008 18:38:08 GMT

Karl wrote:
You're welcome... but I just noticed that you wanted to see the sketch in a 3D view also. To do that, you'll need a jpeg (etc) of it and use the parapicture object that Dwight talks about in various threads. He has uploaded it to the GDL Depository.

Juha is right, and sorry for the 'senior moment' with the comment above where I forgot that the original drawing was a dwg and not a hand sketch. Duh.

Karl

Re: Creating an object from 2d drawing

Anonymous — Wed, 03 Dec 2008 21:11:31 GMT

YESSSSSS Juha...

That exactly what I want...
The only thing is that in the elevation I need another dwg drawing... not the same.... is there a way to combine them??

Thanks

Re: Creating an object from 2d drawing

Anonymous — Wed, 03 Dec 2008 23:07:05 GMT

Hello,

As Karl suggested using the GLOB_CONTEXT variable it can be done automatically.


if GLOB_CONTEXT=4 then ! show elev view in section or elevation 

   !---> paste the 3D-view code here

else ! show plan symbol for all other views 

    !---> paste the other view code here

endif

--
Regards, Juha

Re: Creating an object from 2d drawing

Anonymous — Wed, 03 Dec 2008 23:10:36 GMT

We only had to wait for 3599 posts this to happen

Karl wrote:
sorry for the 'senior moment'

--
Regards, Juha

Re: Creating an object from 2d drawing

Anonymous — Thu, 04 Dec 2008 01:23:26 GMT

Hi,
I did import the plan autocad drawing to the object master script parameters..
but the elevation drawing I couldn't...
How can I put it there in the elevation box?

I saw the cars object in the libray, but they are different from what I want..
You have to choose between the views ( top, elevation, back )..
and all the drawing are on the same 2d first box... I think that the time that this script must enter to see a different view on each .
Thanks

Re: Creating an object from 2d drawing

Karl Ottenstein — Thu, 04 Dec 2008 05:30:58 GMT

Juha wrote:
We only had to wait for 3599 posts this to happen

Karl wrote:
sorry for the 'senior moment'

Kiitos, Juha... but you just haven't noticed all of my other ones [I edit some before anyone notices!].

Regards,
Karl

Re: Creating an object from 2d drawing

derekjackson — Fri, 16 Jul 2010 14:24:56 GMT

I seem to be having a similar problem to fabricfo.

I've created an object that has the following 2D script and nothing else:


HOTSPOT2 0,0

IF (GLOB_CONTEXT=4) THEN
	RECT2 0,0, 1, 1
ELSE
	CIRCLE2 0,0, 1
ENDIF

It sort of works, but not quite. When I place the object in plan, it draws a circle. When I place it elevation, it draws a rectangle. So far, so good.

However, if I place an object in plan, and then view it in elevation, it's blank - the object isn't there. Likewise, if I place the object in elevation, it doesn't appear in plan. I've tried rebuilding the view but no luck.

Any idea why this is? I found a semi-workaround where I just draw the circle in plan, but create the elevation in the 3D script window:


IF (GLOB_CONTEXT=4) THEN
	ROTx 90
	RECT 1,1
	DEL 1
ELSE
	!Draw 3D version of object
ENDIF

However, this limits me to using the 3D planar elements, so I lose full control over fills, can't draw lines, have to specify the symbol in three dimensions, etc.

Is there any way to do all the elevational work within the 2D script? I just can't seem to get it to work...

Thanks,

Derek

Re: Creating an object from 2d drawing

ztaskai — Mon, 19 Jul 2010 07:49:13 GMT

Hi Derek,

You found the only solution for the task. It's not a workaround.

Sections and elevations are 3D based in ArchiCAD. This means that there is no possibility to script the section representation in 2D. Naturally, as a workaround, you can place 2D-based objects on the section view but then they are 2D 'patches' to the section - they won't be included in the VB model.
You've noticed all this already but I wanted to confirm that this is the full set of tools you have.

Best regards,

Re: Creating an object from 2d drawing

derekjackson — Mon, 19 Jul 2010 08:35:49 GMT

Thanks Zsolt, good to know. Is there at least a way of specifying fill and background pens on the 3D POLY_ element? It obviously takes its pen information from somewhere when drawn in 2D elevations...

Re: Creating an object from 2d drawing

derekjackson — Thu, 22 Jul 2010 14:34:46 GMT

Okay, one problem with this solution. It works fine if the elevation is placed looking directly north or south, but any other angle and the object is seen skewed.

I've tried code to rotate the object to face the camera:

dkx = K~ - X~
dly = L~ - Y~
azi = ATN(dly/dkx)	!Azimuth	

ROTz (90 + azi - SYMB_ROTANGLE) !W~

This works fine for objects in 3D view, but when used in elevation, it rotates the object to face the last 3D camera position - not the current elevation angle.

Is there an equivalent GLOB variable for detecting angle of elevation / section? If not, it seems this method won't work either...

Re: Creating an object from 2d drawing

derekjackson — Tue, 27 Jul 2010 09:20:11 GMT

I'm guessing no response means that there isn't a way!

Surprising, as the program must know the angle that the elevation line sits at to be able to calculate what is seen and what isn't.

If anyone knows a way of detecting section or elevation angle, please let me know... If not, any chance it could be added in as either a GLOB or REQUEST variable in a future release?!

I guess the only other solution for now is to create simple revolved forms that look like simplistic trees - these should then be fine from any angle of elevation.

Cheers for the help so far, anyway.

Re: Creating an object from 2d drawing

Anonymous — Tue, 27 Jul 2010 10:59:56 GMT

derekjackson wrote:
Is there an equivalent GLOB variable for detecting angle of elevation / section? ...

Unfortunately no... But you can vote here and cross your fingers.

Cheers,

Paulo

Re: Creating an object from 2d drawing

derekjackson — Tue, 27 Jul 2010 12:18:15 GMT

Thanks. It's becoming quite a routine now that we come up with a great idea for an object, get 90% there, then discover a limitation of GDL that stops us finishing it...

Re: Creating an object from 2d drawing

Anonymous — Tue, 27 Jul 2010 13:58:26 GMT

derekjackson wrote:
It's becoming quite a routine now that we come up with a great idea for an object, get 90% there, then discover a limitation of GDL that stops us finishing it...

I've been there too... Thats why I strongly advice everyone to previously make an implementation plan before diving into script.
I used to hit this wall a lot of times before I have Andrew Watson's GDL Handbook.
It will give you precious hints on starting a personal/commercial GDL object.
Anyway... It seems that GS GDL team put this on the top priority for next releases... So you'll just have to put your object in standby for now.

Cheers,

Paulo