FSCKING LAG

Transcript

1. None

2. FSCKING LAG

3. Video Games!

4. Multi-player video games!

5. Server

6. Server Client Client Client

7. Server Client Client Client

8. Server Client

9. Server Client “I just killed player 1”

10. Server Client “I just killed player 1” “ok”

11. Server Client “I just killed player 1” “ok” BAD

12. Server Client “I pressed these buttons” “This is where things

    are”

13. Server Client “I pressed these buttons” “This is where things

    are” BETTER

14. PROBLEM

15. 1 2 Lag = 1 second Lag = 0.1 seconds

16. 1 2 Shoots! Runs! FROM PLAYER 1’S PERSPECTIVE:

17. Server Player 1 Player 2

18. Server Player 1 Player 2 “I’m shooting!” (1 second ago)

19. Server Player 1 Player 2 “I’m shooting!” (1 second ago)

    “I’m running around the corner!” (0.1 second ago)

20. Server Player 1 has shot, and Player 2 is around

    the corner. Player 1’s shot missed.

21. Server Player 1 Player 2 “Player 2 is now around

    the corner. Player 1 shot, but missed.”

22. Counter-Strike

23. Server Player 1 shot, and at the time, they were

    aiming at Player 2. Their should would have hit.

24. Server Player 1 Player 2 “Player 1 shot Player 2.”

25. Server Player 1 Player 2 “Player 1 shot Player 2.”

    “Oh, and Player 2 still ran around the corner. lol.”

26. Server Player 1 Player 2 “Player 1 shot Player 2.”

    “Oh, and Player 2 still ran around the corner. lol.” wtf

27. Age of Empires

28. 1500 Archers on a 28.8: Network Programming in Age of

    Empires and Beyond Mark Terrano, Paul Bettner

29. PROBLEM: 1500 archers Each one has a position Each one

    is moving

30. Each position is about 4 bytes each

31. 4 bytes ✕ 1500 = 6000 bytes

32. 6000 bytes ✕ 30 frames/sec = 175 kB/s

33. SOLUTION:

34. DON’T SYNC STATE

35. SYNC PLAYER INTENT

36. Client Client Client

37. Client Client Client “I told my archers to move.”

38. Client Client Client “I told my archers to move.” “I

    told a villager to gather wood.”

39. Client Client Client Wait for everyone to finish this frame….

40. Client Client Client Archers are moving, and the villager is

    gathering wood.

41. NOT PERFECT

42. RUNS AT THE SLOWEST PLAYER

43. DESYNCS

44. @thesecretlab rocketboxgame.tumblr.com