🚀 go-pugleaf

"Paul Nicholls" <paul_nicholls@hotmail.com> wrote in message 
news:487edf4e@newsgroups.borland.com...
> Given a bunch of 3d triangles defined either as raw vertices, or indicies 
> to a master list of vertices, has anyone here managed to create a STEP 3d 
> model file from this information using Delphi (or pascal)?
>
> I can create VRML 2 (97) version 3d text files using some code I wrote, 
> but I would like to create STEP 3d text ones now too, but STEP files are 
> waaaaayyyyy complicated and I can't make heads nor tails of it :(
>

BTW, if it helps I want to create STEP AP214 format files (includes colour 
info) and not STEP AP203 (single colour only).

cheers,
Paul 

Is STEP the same as IGES?

In that case, I do have a lot of code. Working on IGES export of 3D meshes 
myself..

I have code for VRML, DXF and IGES so far, where the import part is working, 
now working on export. I'm thinking of casting it into a library which I 
will sell.

Kind regards,

Nils

"Paul Nicholls" <paul_nicholls@hotmail.com> schreef in bericht 
news:487edf4e@newsgroups.borland.com...
> Given a bunch of 3d triangles defined either as raw vertices, or indicies 
> to a master list of vertices, has anyone here managed to create a STEP 3d 
> model file from this information using Delphi (or pascal)?
>
> I can create VRML 2 (97) version 3d text files using some code I wrote, 
> but I would like to create STEP 3d text ones now too, but STEP files are 
> waaaaayyyyy complicated and I can't make heads nor tails of it :(
>
> thanks in advance,
> Cheers,
> Paul.
>
> "The plastic veneer of civilization is easily melted in the heat of the
> moment" - Paul Nicholls.
> paulfnicholls@gmail.NOSPAM.com
>
> Remove ".NOSPAM" to reply.
> 

Nils Haeck wrote:
> Is STEP the same as IGES?

No, it's a format of its own - http://en.wikipedia.org/wiki/ISO_10303

-- 
Anders Isaksson, Sweden
BlockCAD:  http://web.telia.com/~u16122508/proglego.htm
Gallery:   http://web.telia.com/~u16122508/gallery/index.htm

I see, it is a successor of IGES though, according to Wikipedia.

I would have to see some STEP files in order to see if I can adapt my 
software. IGES contains a lot of different entity types, and I didn't 
implement them all. But perhaps enough to use the IGES implementation to 
extend towards STEP easily.

Nils

"Anders Isaksson" <blockcad@REMOVEgmail.com> schreef in bericht 
news:487f9318$1@newsgroups.borland.com...
> Nils Haeck wrote:
>> Is STEP the same as IGES?
>
> No, it's a format of its own - http://en.wikipedia.org/wiki/ISO_10303
>
> -- 
> Anders Isaksson, Sweden
> BlockCAD:  http://web.telia.com/~u16122508/proglego.htm
> Gallery:   http://web.telia.com/~u16122508/gallery/index.htm
>
> 

Nils Haeck wrote:

> I would have to see some STEP files in order to see if I can adapt my
> software.

Some examples here - http://www.nanomotion.com/index.aspx?id=2625
http://www.sunhydraulics.com/cmsnet/DownloadZip.aspx?Product=Manifold

I don't know how relevant these excamples are for the OP, though.

-- 
Anders Isaksson, Sweden
BlockCAD:  http://web.telia.com/~u16122508/proglego.htm
Gallery:   http://web.telia.com/~u16122508/gallery/index.htm

Since STEP and IGES are very wide formats with lots of different entity 
types, I'll wait for the OP (Paul) to post something :)

Nils

"Anders Isaksson" <blockcad@REMOVEgmail.com> schreef in bericht 
news:488109d4$1@newsgroups.borland.com...
> Nils Haeck wrote:
>
>> I would have to see some STEP files in order to see if I can adapt my
>> software.
>
> Some examples here - http://www.nanomotion.com/index.aspx?id=2625
> http://www.sunhydraulics.com/cmsnet/DownloadZip.aspx?Product=Manifold
>
> I don't know how relevant these excamples are for the OP, though.
>
> -- 
> Anders Isaksson, Sweden
> BlockCAD:  http://web.telia.com/~u16122508/proglego.htm
> Gallery:   http://web.telia.com/~u16122508/gallery/index.htm
>
> 

"Nils Haeck" <bla@bla.com> wrote in message 
news:4881c398$1@newsgroups.borland.com...
> Since STEP and IGES are very wide formats with lots of different entity 
> types, I'll wait for the OP (Paul) to post something :)
>
> Nils
>

Hi Nils,
    I have posted to attachments an example step file (and it's equivalent 
VRML (97) version if it helps). see the 'STEP file for Nils' post.

cheers,
Paul 

Hi Paul,

Thanks, I got the files. STEP does look much like IGES, but without the 
directory and parameters sections, just with each entity written out directy 
(so actually simpler than IGES).

I would have to write a separate parser/writer though, and don't have the 
exact specs, so it will be quite a lot of work and testing for which I have 
no time at the moment.

When I get to it, I'll let you know here in the newsgroup. You can try 
contacting me back in a few months if you like, to ask for the status.

As you can see from the filesize, but also looking at the content of the 
files (both are text based), the VRML file is "infinitely" simpler than the 
STEP file.

The structure of the STEP file is basically like this: each line starts with 
an entity number, then a string with the entity type, then "(" followed by 
the parameters for this entity, then ")". The parameters starting with a # 
indicate references to other entities.

Kind regards,

Nils


"Paul Nicholls" <paul_nicholls@hotmail.com> schreef in bericht 
news:4883c94c@newsgroups.borland.com...
> "Nils Haeck" <bla@bla.com> wrote in message 
> news:4881c398$1@newsgroups.borland.com...
>> Since STEP and IGES are very wide formats with lots of different entity 
>> types, I'll wait for the OP (Paul) to post something :)
>>
>> Nils
>>
>
> Hi Nils,
>    I have posted to attachments an example step file (and it's equivalent 
> VRML (97) version if it helps). see the 'STEP file for Nils' post.
>
> cheers,
> Paul
> 

"Nils Haeck" <bla@bla.com> wrote in message 
news:488637e4$1@newsgroups.borland.com...
> Hi Paul,
>
> Thanks, I got the files. STEP does look much like IGES, but without the 
> directory and parameters sections, just with each entity written out 
> directy (so actually simpler than IGES).
>
> I would have to write a separate parser/writer though, and don't have the 
> exact specs, so it will be quite a lot of work and testing for which I 
> have no time at the moment.
>
> When I get to it, I'll let you know here in the newsgroup. You can try 
> contacting me back in a few months if you like, to ask for the status.
>
> As you can see from the filesize, but also looking at the content of the 
> files (both are text based), the VRML file is "infinitely" simpler than 
> the STEP file.
>
> The structure of the STEP file is basically like this: each line starts 
> with an entity number, then a string with the entity type, then "(" 
> followed by the parameters for this entity, then ")". The parameters 
> starting with a # indicate references to other entities.
>
> Kind regards,
>
> Nils
>

Thanks for looking at it Nils :-)
I may actually try using OpenCASCADE to create the step file instead...
It may still be usefull for you (commercially) to make a writer/parser as 
STEP files are the up and coming thing at the moment in the MCAD/Electronics 
field :-)
cheers,
Paul