I'm wondering if the slow computers are using CPU-based GL (software rendering).

1) Implement jumping and fix the physics because I probably have it set up horribly. Right now my sprite just "flies" when you hold space bar. Tried to add mass to the sprite, but that just made things worse no matter what I set gravity to I couldn't get it to work right :P I haven't trie...

pop() does not wait, but supply() does wait. I think what's happening is: 1. Your thread starts and does a pop(). Since there's nothing, it returns nil, executes the rest of the code, and the thread terminates. 2. When you press a key, the main application uses supply(), which waits for someone to r...

A sign. The player.y + player.speed * dt inside the rectangle call of the Up direction should be a -.

I replied a very similar question here: https://www.love2d.org/forums/viewtopic ... 17#p191675

Weird. I tried with pngcrush and trimage, and both preserved alpha. I start to wonder if ImageOptim does something else, e.g. quantization (creating indexed images with palette) like other lossy compressors do, e.g. pngquant.

Yeah, there's a few rare cases where -0 makes a difference, apart form display. For example, math.atan2(0,-1) returns 3.1415926535898 but math.atan2(-0,-1) returns -3.1415926535898. But in general, it's nothing to worry about besides for display purposes. They compare as equal: assert(0==-0) doesn't...

math.abs(math.max...) should do the trick.
Edit: missed Beelz's edit, sorry.

Yeah, that's where this bit comes into play:

pgimeno wrote:Edit2: Also, your sin/cos calls seem to be expecting a different convention for angle, as you're using sin(angle) for x and cos(-angle) for y, rather than the usual cos(angle),sin(angle).

There is a way to check if there's loss of quality. With GIMP: - open the two images in two different layers - set the top layer to Difference mode (that layer mode is the absolute value of the difference, so if they are not equal it will be nonzero) - merge down the layers or flatten image (the for...