stopwatch.c

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#include <banjo/log.h>
#include <banjo/main.h>
#include <banjo/system.h>
#include <banjo/time.h>
 
int main(int argc, char* argv[]) {
    (void)argc; (void)argv;
 
    if (!bj_begin(BJ_NO_SYSTEM, 0)) {
        return 1;
    }
 
    // A stopwatch must be zero-initialised before use.
    bj_stopwatch stopwatch = {0};
 
    // Run for about 3 seconds, measuring the time around each iteration.
    double elapsed = 0.0;
    while (elapsed < 3.0) {
        // Update the stopwatch once per iteration to record the current time.
        // The first call starts the stopwatch.
        bj_step_stopwatch(&stopwatch);
 
        // Total time elapsed since the stopwatch started (first step call).
        elapsed = bj_stopwatch_elapsed(&stopwatch);
 
        // Delta time - time since the previous step. This is crucial for
        // frame-independent movement and animation. For example:
        //   position += velocity * delay;
        // ensures objects move at constant speed regardless of loop rate.
        double delay = bj_stopwatch_delay(&stopwatch);
 
        bj_trace("Elapsed: %.3lf s | Delay: %.3lf s", elapsed, delay);
 
        bj_sleep(300);
    }
 
    bj_end();
    return 0;
}