This may have a simple solution, but I haven't thought of one yet...
I have a heightmap of altitude values. The heightmap is subject to
modification during the course of my program. When I load the heightmap I
compute the maximum and minimum values (altitudes). During the program, if
a value in heightmap that is modified goes beyond the maximum altitude, I
assign that value to the maximum altitude (and similarly for the minimum
altitude).
However, I also want to be able to tell if the maximum value has _shrunk_
(or if this minimum value has increased). So far I can't think of a simple
way to do this other than rescanning the whole heightmap whenever a value is
modified, and clearly this is not a practical solution.
Hopefully there's a nice simple method that I'm blind to, so please
enlighten me if you can. (-:
-Sam
______________________
Sam McGrath
sa...@dn...
http://www.dnai.com/~sammy
ICQ 5151160
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