Re: Last Quesa is very slow

[James W. <ja...@fr...>]

Sauro Agostini wrote:
>>
>> Anyway, you need to improve your model.  The farmhouse model has
>> multiple references to various groups.  Of course in some cases multiple
>> references can make sense, for instance if the references are subject to
>> different transformations, but in this case the multiple references are
>> just siblings in a group.  That is, you're rendering things multiple
>> times for no apparent reason.  When I removed the multiple references,
>> the model rendered almost 10 times faster with no apparent change in
>> appearance.
> 
> 
> Can you send me the modified model? It could be very useful for me, I 
> tried to remove some references from the 3DMF file, but the 
> appearance was different.
> 
> Thank you in advance.
> 
> Sauro Agostini

(model attached in private mail, not in the list)


Here is the code I used to remove the extra references.

	TQ3GroupPosition	pos, nextPos;
	TQ3Object	prevMember = NULL;
	TQ3Object	curMember;
	
	Q3Group_GetFirstPosition( theGroup, &pos );
	while (pos != NULL)
	{
		nextPos = pos;
		Q3Group_GetNextPosition( theGroup, &nextPos );
		Q3Group_GetPositionObject( theGroup, pos, &curMember );
		Q3Object_Dispose( curMember );	// the group still holds a ref
		if (curMember == prevMember)
		{
			curMember = Q3Group_RemovePosition( theGroup, pos );
			Q3Object_Dispose( curMember );
		}
		else
		{
			prevMember = curMember;
		}
		pos = nextPos;
	}


Even after this change, I think there is still much room for improvement
in your farmhouse.  I am thinking of writing up some algorithms to
modify Quesa groups in various ways, such as merging TriMeshes.
-- 
    James W. Walker, Innoventive Software LLC
    <http://www.frameforge3d.com/>