[fluxus] Object Loader

[Christian Sandor]

Hi Dave!
Thanks for the fast answer!
I understand that fluxus is mainly intended for procedural modelling.
However, combining procedural and conventional models seems like a  
nice thing :-)

On Jan 2, 2007, at 10:06 AM, dave wrote:
> On Mon, 2007-01-01 at 20:45 +0900, Christian Sandor wrote:
>> 1) Speed
> I think the obj-loader is probably quite easily improved
ok! I will look into the model loader's code when I find time!

>> 2) Caching of Loaded Models
> You can do this with the current code, as you can call obj-load  
> once and
> use the returned list in multiple calls to obj-make. It might also  
> be a
> fix for the absurd load times to save out the list created by obj- 
> load,
> as loading them in would not require any further processing.
>> 3) Reusing pdata
>> I do not know what to do: consider example/17-physics1.scm
> no - it needs a build-instance! consider it todo'ed.

funny thing: we seem to have a misunderstanding :-)
actually, the first part of your answer to question 2) is solving my  
problem from 3).
However, I am still unclear about question 2)

About 3): I have added code as you suggested to that example. Now, I  
can see hundreds of
bunnies flying on my screen :-)
(quite slow though...)
What I have added:
(define li (obj-load "meshes/bunny-1500.obj"))
then, I have changed the line:
         (let ((ob (build-cube)))
to:
         (let ((ob (obj-make li)))
Is this a good solution?

About 2)
The beauty of fluxes is that you can make a tweak to your program,
then press F5, then see the changes immediately. However, with the
currently slow obj-load code, it is more like... press F5... wait 1  
second....
see the change. So my question 2) was asking: how can I get rid of  
the 1 second waiting time?
More abstractly said: it boils down to saving state (=the loaded  
model) between several runs
of a script.

I have found a hack for achieving this (is there a better way?):
I have put in my ~./fluxus.scm:
(load "<full-path>/scm/objimport.scm")
(define bunny-list (obj-load "<full-path>/meshes/bunny-1500.obj"))

In my code, I write:
(let ((ob1 (obj-make bunny-list)))
Now, the object is loaded exactly once! No matter, how often I press F5.

You wrote:
> It might also be a
> fix for the absurd load times to save out the list created by obj- 
> load,
What did you mean by "save out"?

Thanks and cheers!
	Chris

PS
As you have guessed correctly, I was about to ask you about using the  
OPCODE part of ODE in fluxus ;-)
This should be awesome! (ODE's test_moving_trimesh.exe looks quite  
impressive)
But, I understand: 0.12 has a much higher priority!