topic Re: a strange chimney in Libraries & objects

a strange chimney

Anonymous — Tue, 23 Feb 2010 16:56:34 GMT

I am currently trying to modify a complex(for my level of gdl) object.It represents a chimney made by Antoni Gaudi.I am also going to try to make it parametric as much as possible,and use subroutines as i go as much as possible.The thing that i am stack with at the moment is that little REVERSE STAIR object, which i can't seem to position correctly.It must be put at the bottom nodes of the OCTAGON_PYRAMID.I am trying to use 2 nested FOR NEXT loops,i don't even know if this is the correct way,apparently not since my REVERSE STAIR doesn't go anywere..

Here is my 3d script

PEN pyr_pen
MATERIAL bot_pyr_mat

!!!BASE CONE
ADDZ pyr_h
CUTPLANE 0
DEL 1
ROTZ 22
FPRISM_ bot_pyr_mat, bot_pyr_mat, bot_pyr_mat, bot_pyr_mat,
9,5*pyr_h, 83,4.95*pyr_h,

-0.8, -0.8, 15,

-0.8, 0.8, 15,

0.8, 0.8, 15,

0.8, -0.8, 15,

-0.8, -0.8, 15,

-0.8, 0.8, 15,

0.8, 0.8, 15,

0.8, -0.8, 15,

-0.8, -0.8, 15
DEL 1
CUTEND

!!!MID_PRISM
R=b_r
ADDZ 0.7
PRISM_ 16, pyr_h,
!! X !! Y
COS(90+45)*R, SIN(90+45)*R, 15,

COS(90+2*45)*R, SIN(90+2*45)*R, 15,

COS(90+3*45)*R, SIN(90+3*45)*R, 15,

COS(90+4*45)*R, SIN(90+4*45)*R, 15,

COS(90+5*45)*R, SIN(90+5*45)*R, 15,

COS(90+6*45)*R, SIN(90+6*45)*R, 15,

COS(90+7*45)*R, SIN(90+7*45)*R, 15,

COS(90+8*45)*R, SIN(90+8*45)*R, 15,

COS(90+9*45)*R, SIN(90+9*45)*R, 15,

COS(90+10*45)*R, SIN(90+10*45)*R, 15,

COS(90+11*45)*R, SIN(90+11*45)*R,15,

COS(90+12*45)*R, SIN(90+12*45)*R, 15,

COS(90+13*45)*R, SIN(90+13*45)*R, 15,

COS(90+14*45)*R, SIN(90+14*45)*R, 15,

COS(90+15*45)*R, SIN(90+15*45)*R, 15,

COS(90+45)*R, SIN(90+45)*R, 15

!!!OCTAGON_PYRAMID
R=c_r
ADDZ 4.8
CUTPLANE
DEL 1
ADDz 2
PYRAMID 8,4,1 + 4*3 + 16*16,
!!! X !!! Y
COS(90+45)*R, SIN(90+45)*R, 0,

COS(90+2*45)*R, SIN(90+2*45)*R, 0,

COS(90+3*45)*R, SIN(90+3*45)*R, 0,

COS(90+4*45)*R, SIN(90+4*45)*R, 0,

COS(90+5*45)*R, SIN(90+5*45)*R, 0,

COS(90+6*45)*R, SIN(90+6*45)*R, 0,

COS(90+7*45)*R, SIN(90+7*45)*R, 0,

COS(90+45)*R, SIN(90+45)*R, 0
CUTEND
DEL 1

ang=22
MATERIAL st_mat
ADDZ 6
FOR K=0 TO K=360 STEP ang
FOR J=1 TO J=8
ROTZ ang
ADDX COS(90+J*45)*1.5
ADDY SIN(90+J*45)*1.8
GOSUB 500:!REVERSE STAIR
DEL 3
NEXT J
NEXT K

500:!REVERSE STAIR
ROTY 90
ADDZ 0.2
BLOCK 0.3, 0.12, 0.05
ADDZ -0.05
BLOCK 0.25, 0.12, 0.05
ADDZ -0.05
BLOCK 0.2, 0.12, 0.05
ADDZ -0.05
BLOCK 0.15, 0.12, 0.05
DEL 5

Re: a strange chimney

Anonymous — Tue, 23 Feb 2010 17:08:03 GMT

I would use some form of the Prism to get the stair stepping and use transformations to put it in place. Using stacked Blocks seems a bit clumsy and will leave edges where they meet in 3D (unless the coplanar faces are now cleaned up - I haven't checked recently since I never stack Blocks).

If you really want to make this parametric you will probably want to use variable parameters rather than constants for your node and size values associated to the Prism and Block statements.

If you only need limited parametrics you could build this rather easily with profiled walls and beams and save as a library part. It seems like ne of the few things Gaudi designed for which this can be said.

Re: a strange chimney

Anonymous — Thu, 25 Feb 2010 20:41:39 GMT

Nice study case.

Attached an attempt of chimney.
Parametric, within reasonable limits.

About Gaudi, take a look at this thread.
It was done in AC7, with ArchiForma.
Amazing.

Re: a strange chimney

Anonymous — Fri, 26 Feb 2010 09:21:33 GMT

Olivier wrote:
About Gaudi, take a look at this thread.
It was done in AC7, with ArchiForma.
Amazing.

Hello Olivier

I agree totaly.
I din't Know this thread.
Thanks a lot.

Re: a strange chimney

Anonymous — Fri, 26 Feb 2010 09:22:08 GMT

Sorry for double post…

Re: a strange chimney

Anonymous — Fri, 26 Feb 2010 11:32:04 GMT

Thank you so much Olivier.I have to admit it will take me some time to fully understand your script, you must be very familiar with Gdl..This object is one among various objects designed by Gaudi I am trying to create in Gdl, for my final university project.What I am intending to do is to compare and contrast simple 3d modelling to parametric modelling, to prove the importance and usefulness of parametric modelling tools.It's quite difficult, since i am a newbie in scripting and i have to study lots of things at the same time.
Anyway thanks again.

Re: a strange chimney

Anonymous — Fri, 26 Feb 2010 15:40:35 GMT

deinan, glad this can help.

To complete, I have added graphical hotspots, thus you can change parameters in 2D/3D.
Good luck for your next objects.

@Fmr : Frédéric, about Casa Battlo, nice example of freeform modeling, isn't it?
A bit of publicity for Fabrizio doesn't hurt. 😉

Re: a strange chimney

Anonymous — Fri, 26 Feb 2010 18:41:02 GMT

A tiny correction for inclined wall thickness.
The tedious part is not to script but to do some testing after. 😉
That's all, folks.

Re: a strange chimney

vistasp — Mon, 01 Mar 2010 02:16:03 GMT

deinan wrote:
This object is one among various objects designed by Gaudi I am trying to create in Gdl, for my final university project.

All the very best with your university project deinan. If you end up making a catenary archway, do post it to this forum.

Re: a strange chimney

Anonymous — Mon, 01 Mar 2010 13:59:57 GMT

Thank you vistasp. Thanx everyone. I 'll post every successfull object i manage to create..