Re: Proposal for the geometric engine, RFC

[Dylan Paul Thurston <dpt@math.berkeley.edu>]

On Wed, Mar 22, 2000 at 07:53:33PM +0800, Hilaire Fernandes wrote:
> Stupid I am, this was the old diagram, here the new:
> 
>  	 +-point+
>  	 |	|
>  	 |	+-freePoint
>  	 |	+-freePontOnCurve		
>  	 |	+-intersectionPoint
>  	 |	+-transformedPoint
>  	 +-curve+
> 	 |	|
> 	 |	+direction+
> 	 |	|	  |
> 	 |      |         +-line
> 	 |	|         +-halfLine
>  	 |	|         +-segment
> 	 |	|	  +-vector
> 	 |	+-circle
> 	 |	+-arcCircle
> 	 |	+-locus
> 	 +-value
> 	 +-reference frame

Looks like a good structure.  I'm not sure "direction" is the right term,
though; maybe "straight" or "flat"?
 
> Do some of you know Cabri ?  It's look like the Cabri author is angry
> against Dr Geo. 

Understandable; you'll be stealing his market share in doing a service
for everyone.  I wouldn't worry about it.

Best,
	Dylan Thurston