Flappy Bird：有没有办法找到产卵率 - 两极？

Question

I have made a working Flappy Bird game, but the green poles are spawning in a weird way. I have done it like this:

• frameCount is a p5.js variable counting the frames
• draw is a p5.js function that will be done every frame

    let game_speed = 1;
    let max_speed = 1000;
    let spawn_rate = Math.round(max_speed / game_speed);
    function draw(){
      if(frameCount % spawn_rate === 0)
        generateNewPole();
      game_speed += (game_speed < max_speed / 10)? 0.001 : 0;
      spawn_rate = Math.round(max_speed / game_speed);
    }

I have tried the following formulas for the spawn_rate :

• Math.round(max_speed - game_speed)

  • This didn't work even close to good

• Math.round(max_speed / game_speed)

  • This worked ok, but I have random big gaps everywhere

• Math.round((max_speed - game_speed) / game_speed)

  • This worked also quite well, except for random gaps here too

• Math.round((max_speed - game_speed) / (max.speed / game.speed))

  • The poles spawned at a god-speed rate

• Math.round(max_speed / Math.round(game_speed))

  • Also random gaps

• if(Math.round(frameCount * game.speed) % max_speed === 0)

  • Yeah... not a single pole spawned at all

For the second and third things I tried (see above), I expected them to work, but there are still spaces. This might be because of JavaScript's way of handling decimal numbers (It sucks at it) or I am just dumb and doing something completely wrong

edit: here is a link to my code

Answer 1

Math.round(max_speed / game_speed)

I can hazard a guess that the big gaps you describe are caused by Math.round when it switches from rounding down to rounding up (and vice versa). I suspect you'd get more consistant behaviour if you switched to Math.floor or Math.ceil .