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[racket] writing a define-world macro

From: Stephen Bloch (sbloch at adelphi.edu)
Date: Mon Jul 26 07:12:40 EDT 2010		 
On Jul 25, 2010, at 9:49 PM, Shriram Krishnamurthi wrote:

> Generalize.

As in
(rocket-update-velocity old-rocket
                                           (posn-update-x (rocket- 
velocity old-rocket)
                                                                         
(+ 1 (posn-x (rocket-velocity old-rocket)))))
?

Yes, this gets sorta lengthy, but are there implementation issues I'm  
not seeing?



Stephen Bloch
sbloch at adelphi.edu



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