Exporting 3D models from GR2

[skwasjer]

Originally Posted by privateer

I didn't take it that way at all Mate.


I did fix the bad loop and that 600 meg file comes out at
just over 51 megs now.

If I dropped the normals it would be smaller.
Around 38+ megs.

That's great

Originally Posted by Anvart

Thanks for the situation analysis, Skwasjer.
At last i have seen the constructive answer...
I suspected not optimised creation of obj-file too (for this purpose i have written #65)... but i wanted to see your answer.
... or you have not understood my intentions...? with my english i cannot be assured...

I just thought 600 MB for an OBJ-file was crazy (and total export > 1GB from a single 50 MB GR2-file)! So I had to look why... no ill intentions.

[Anvart]

Originally Posted by skwasjer

...
to look why... no ill intentions.

Why you have supposed it?
...
My EN is difficultly understood (or not is understood completely)...?

Dropping the loop puts all objects in one mesh again.
But I'm looking at a function to make the loop optional,
to break the objects up, then filter out the unused verts.
The VGC library is what I'm looking at to do the filtering.

I've found no good way yet to do it differently.
There's no pointer I have found to break them up without the extra garbage.

[skwasjer]

You do not need to filter the vertex/uv/normal list yourself, just drop it in the first section of the file like you already have, and then you can break up the file in subobjects with an g-token... Then you can use the same vertex/uv/normal list, still all in one big file. This is equaly valid as putting shorter lists of vertex/uv/normals before each face list (although the latter would be a little better to read visually).

v x,y,z
..
..

vn x,y,z
..
..

vt u,v(,w)
..
..

g object1
(usemtl)
f vi/vti/vni etc...
..
..

g object2
(usemtl)
f vi/vti/vni etc...
..
..

I understand the 'g object' command.
What I have not found is a way to break the list down in the GR2 files.
They are packed as one long list.
(That's why the loop)

I've not found a pointer as to where to break this list.

[skwasjer]

You don't have to is what I am saying. You just write them all out only once at the top of the file, and then loop all subobjects and write them out. That should do, afaik. Did you already try this, and/or does this give specific problems?

[skwasjer]

Or do you mean there are no subobjects in that one big mesh? In that case you could do a split on material (I think Anvart suggested this too). This is also what I did in my example above.