Gena wrote:
> 
>>- to be able to make the plant generation interact with the rest of the
>>scene.
>>- to be able to use other POV-Ray features in the plant generation process.
> 
> 
> Could you clarify?
> 

With interaction i mean interaction with the scene geometry - a tree 
being limited by a house, a plant growing on a wall etc.

POV-Ray features that can be used could for example be the use of 
patterns to control leaf properties.

> Maybe I'm just not aware of such rule based systems :(
> Probably there is a need to define what we mean saying -
> rule-based system. Is Tom-Tree or any other POV-Ray tree generator
> a rule-based system? When you specify a set of properties for the
> system do you specify the rules or not? :)

I don't know much about the Tomtree inner workings but I think all SDL 
based systems available are rule based with a fixed set of rules with 
various parameters that can be set.

Rule based simply means that the plant is generated using a set of 
recursive drawing rules.  Of course any mesh could theoretically be 
translated back into a set of mesh generation rules.  So it only makes 
sense to speak of a rule based plant generator if at least some of the 
rules are generic, meaning they are used multiple times in the tree 
generation process.  For example you could have one rule that generates 
all first level branches of a tree (which might contain random elements 
so not all branches are identical).

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
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