Roger Hui wrote: > f can be rendered readily in C. ...
A nice thing about this approach (aside from being far less verbose than the state machine I posted) is that it allows you to eliminate almost all conditional code. On modern CPUs, "balanced" if statements (where one choice is about as likely as the other) can be a significant time waster. For example, the code appears to require an if statement inside the loop, but the loop can be unrolled so that it increments by 2 (and since first and last corner can be generated outside the loop, this adds minimal complexity). -- Raul
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