These days, I designed a timing system for my game. Doesn’t really sound impressive, eh?
The problem with accurate timing, apart from hardware faults making timers change speed or jump back, is to resample a high-frequency clock running at 3+ MHz to the update rate your game is running with.
The naive approach would be to just cast the clock to a double and divide it by one 60th (if you want 60 Hz updates) of the clock’s frequency. But that’s not really such a good idea. Let me illustrate:
int main() { float a = 20000000; ++a; // a is still 20,000,000. The accuracy of the float has diminished so // much that you not only have zero decimal places, it cannot even assume // the value 20,000,001 -- only 20,000,002! double b = 10000000000000000; ++b; // b is still 10,000,000,000,000,000. Same reason. }
Loading tweets...
Recent Comments