9c070e4f9b
Previously, it picked out two adjacent bits in the result of rand(). Unfortunately, these adjacent bits (at least on NetBSD) have a certain amount of dependance. After a period (perhaps a thousand or so?), it starts to repeat the pattern of those two bits. (I think; I haven't actually tested that directly.) This presumably is locking it into a an an N-way attractor on the "snowflake", such that if you zoom in a ways, you will start to see some spots *quickly* are colored, and others are *never* colored. What I've done now is to pick up two widely-spaced bits in a single rand() call. (Perhaps we would do as well to pick up something like bit #16 from two consecutive rand() calls?) These widely-spaced bits have a lower statistical dependance on one another (if I can get away with using that term for an arithmetic operation; though since stats has more to do with sampling and less to do with true randomness, I may be safe). The net effect, at leats on NetBSD, is far better snowflake if you zoom in on it. git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@324 7f0cb862-5218-0410-a997-914c9d46530a