Re: [Flightgear-devel] LOD problems

[Josh Babcock]

Frederic BOUVIER wrote:

Josh Babcock wrote:

 

<snip>
   

I think the problem can be with your model. I think of two more points to check :

1. if your objects are included in a branch that is culled, they will not appear.
 

None of the 6 objects in the problem animation are members of any group.

2. if your objects are a single quad or triangle, plib doesn't name then and
 they cannot be selected. A single quad must be split in 2 triangles to have
a named object.
 

I already ran into this problem with some other animations, it does not 
affect these objects.  These are all at least 4 poly's.

-Fred
 

And here's a really weird thing.  If I take any one of the six objects 
and put it in this animation it works fine.  I tried all six 
individually.  Next I tried just two, and it got even worse:

<animation>
 <type>range</type>
 <min-m>0</min-m>
 <max-m>2000</max-m>
 <object-name>leftgunner</object-name>
</animation>
^ This one works fine.  Everything is visible close up, but the left 
gunner bubble isn't visible from  over 2 klicks away.

<animation>
 <type>range</type>
 <min-m>0</min-m>
 <max-m>2000</max-m>
 <object-name>rightgunner</object-name>
 <object-name>leftgunner</object-name>
</animation>
^ This one doesn't.  The right gunner bubble appears and disappears just 
fine but now the left bubble is broken.

Do it like this:

<animation>
 <type>range</type>
 <min-m>0</min-m>
 <max-m>2000</max-m>
 <object-name>astrodome</object-name>
 <object-name>rightgunner</object-name>
 <object-name>leftgunner</object-name>
</animation>
and only the astrodome works right, the two gunner positions disappear 
entirely.

So it looks like in this particular animation, the first object is 
treated correctly, whatever it is, and the remaining objects are just 
thrown away somehow.  I think I missed this at first because in the 
original animation I had a very small object first.  These all have 
translucent materiels assigned to them in the .ac file, BTW.  Now that I 
know what to look for, I can also see this very same problem in this 
animation:

<animation>
 <type>range</type>
 <min-m>2000</min-m>
 <max-m>10000</max-m>
 <object-name>opaque-tailwindow</object-name>
 <object-name>opaque-lwindow</object-name>
 <object-name>opaque-rwindow</object-name>
 <object-name>opaque-canopy</object-name>
</animation>
So my question now is, is this a misfeature where I have to group 
everything I want to animate under a single object or create multiple 
animations, or is it a bug?

Josh

PS, if any more C savvy people out there want to look closer at this and 
can't duplicate it, I can send the whole set of .xml files and the .ac 
file to you.



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