[plt-scheme] MrEd: Structure problem

From: Chongkai Zhu (czhu at cs.utah.edu)
Date: Sat Mar 31 09:41:46 EDT 2007

In general, box (chapter 3.11 of MzScheme manual) is something like pointer in C. But for your case, with the information you mentioned in this mail, I'm not sure whether using box is the best solution. 


----- Original Message ----- 
From: ela tataruch 
To: plt-scheme at list.cs.brown.edu 
Sent: Saturday, March 31, 2007 6:29 AM
Subject: [plt-scheme] MrEd: Structure problem

I'm making a project using MrEd which finished should allow drawing euclidian geometry. First, I thought of storing position of all my points in a list in order to be able to move points. But I realized that when I move points, figures which are drawn with them don't change. What I would need is something like pointers in C, so when one coordinates changes, all figures which use them, will change too. Does something similar exists in scheme?

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