"Bald Eagle" <cre### [at] netscapenet> wrote:
> "m@b" <nomail@nomail> wrote:
> > (In response to "Post something", Bald Eagle)
>
> Thanks - that's one facet of this thread - so often we're independently trying
> to work something out by ourselves (which is admirable), but the solution might
> elude us for some time and thwart the completion of a project.
>
> > I wish we had access to Subset_Start_Frame and Subset_End_Frame from within the
> > SDL.
> >
> > We already have access to initial_frame, final_frame, frame_number, etc.
> >
> > I have a inc file that reports (via #debug) animation average frame time,
> > estimated completion time, etc. It doesn't work if I am only rendering a subset
> > of an animation.
>
> Yes, that would be helpful.
> I don't often use animation or ini files (that's more of a jr thing)
> but I'm wondering if you can do something similar to what's done with screen.inc
> where the user defines the camera position and look_at vectors as SDL-visible
> identifiers, and then proceeds to use them from there.
>
> I recall that you can set identifier values from an ini file, so perhaps you can
> pass the information in to the main scene file that way.
>
> 3.2.5.1 Constant
> Declare=IDENTIFIER=FLOAT Declares an identifier with a float value
> You can now declare a constant in an INI file, and that constant will be
> available to the scene. Since INI file statements may also be laced on the
> command-line, you can therefore also declare on the command-line (though there
> is no switch for it).
>
>   Declare=MyValue=24
> This would be the same as a #declare MyValue=24; in a scene file. The value on
> the right-hand side must be a constant float value.
>
> A possible use could be switching off radiosity or photons from command-line:
>
> --in INI-file / on command-line
>
> Declare=RAD=0
>
> --in scenefile
>
> global_settings {
>   #if (RAD)
>     radiosity {
>     ...
>     }
> #end
> }
>
> So, in your ini file you do something like Subset_Start_Frame=30
> but I'm wondering if you can then do something like
> Declare=SSF=Subset_Start_Frame.
> If not, you could just set Declare=SSF=30 and then do Subset_Start_Frame=SSF
> (if that works)
>
>
> - BE

Thanks for the reply, I didn't realise I could pass identifier values from an
ini file, that's useful.

Unfortunately "The value on the right-hand side must be a constant float value."

So this works:

   Subset_Start_Frame=394
   Declare=SSF=394

But these don't:

   Subset_Start_Frame=394
   Declare=SSF=Subset_Start_Frame

   Subset_Start_Frame=394
   Declare=SSF=float(Subset_Start_Frame)

   Declare=SSF=394
   Subset_Start_Frame=SSF

Declaring twice is no big hardship as long as I remember!
Thanks again,
m@

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