nikaoto / love2d-gameloop

Testbed for various game loop and timestep methods.

love2d-gameloop

Times taken for the player to reach the end of the ruler. In other words, the player, moving at a constant speed of 10 pixels per second, took this much game time to cover a distance of 66 pixels:

..	vsync	novsync & dynthrot	novsync & stathrot	novsync & simpdynthrot
..	6.64569	6.63680	6.63416	6.6385
..	6.64745	6.63504	6.63669	6.64532
..	6.64496	6.64029	6.63644	6.64029
avg	6.64603	6.63504	6.63576	6.64137
diff	0	0.01099	0.01026	0.00466

This still needs more testing. I will expand on each table entry with explanations after I have tested them thoroughly in actual games. When we don't have vsync the novsync & simpdynthrot method works best and is what's implemented in src/engine/runtime.lua. The same method works when vsync is on, the throttling simply won't happen since the desired fps is not being exceeded.

• Use v key to toggle vsync
• Use r key to toggle slow rendering simulation
• Use u key to toggle fast rendering simulation
• Play with globals declared in src/main.lua

Resources:

• https://medium.com/@tglaiel/how-to-make-your-game-run-at-60fps-24c61210fe75
• https://web.archive.org/web/20150702054525/http://bulletphysics.org/mediawiki-1.5.8/index.php/Canonical_Game_Loop
• https://web.archive.org/web/20141217095341/http://www.koonsolo.com/news/dewitters-gameloop/
• https://web.archive.org/web/20170608104357/http://gafferongames.com/game-physics/fix-your-timestep/
• https://marioslab.io/posts/jitterbugs/#The%20story%20of%20Pixi