//-----------------------------------------------------------------------------
// name: gameloop.ck
// desc: basic ChuGL rendering/game loop
// requires: ChuGL + chuck-1.5.1.5 or higher
//
// author: Andrew Zhu Aday (https://ccrma.stanford.edu/~azaday/)
//         Ge Wang (https://ccrma.stanford.edu/~ge/)
// date: Fall 2023
//-----------------------------------------------------------------------------
// uncomment to run in fullscreen
// GG.fullscreen();

// for printing only
int fc;
// start time
now => time startTime;

// a second graphics shred
fun void gameloop()
{
    while (true) {
        GG.nextFrame() => now;
    }
} spork ~ gameloop();

// infinite time loop; main graphics shred
while( true )
{
    // IMPORTANT: synchronization point with next frame to render
    // must be called at the beginning of every frame,
    // so the chuck VM can properly mark this shred as a graphics shred
    GG.nextFrame() => now;
    // print frame count, time since start, FPS
    <<< "main loop frames:", fc,
        "seconds since start:", (now-startTime)/second,
        "FPS:", fc/((now-startTime)/second)>>>; fc++;
}