Bug caused by emissive colour?

[Roger H. <rog...@mi...>]

I have spent the last three days tracing a problem with our  
application, that it will not print on PowerPC, even though it works  
fine on Intel.

It took me a day just to find between which two SVN revisions it went  
wrong.

The only thing that was changed between the last working revision and  
the first non working revision was that we imported many of the  
recent changes to Quesa.

Well, maybe we made a mess of selecting the changes we wanted, but I  
think it is worth warning you in case anyone else (a) is having a  
similar problem or (b) could throw some light on what is happening.


I used a binary sort on the changes, though the 'order' used for  
comparison  may not have been very scientific. Anyway, I identified  
the point it went wrong. It was when the emissive colour attribute  
was introduced into the TQ3ViewStackItem struct, and also into the  
constructor. It makes no sense that it should make it fail,  
especially only on one platform, and on printing only whilst working  
perfectly on screen. On OS9 I would might have suspected the stack  
was growing past its limit, but I don't think can easily happen on OS- 
X, and anyway, I think these are heap items merely pointed to by the  
stack.

For now I will remove the offending item (and everything which  
references it) from my latest code and see if that cures everything  
for me.

I'll let the list know how I get on.

Roger Holmes.