I tried, but stumbled on some errors when I attempted to make up some assets in order to run and debug it. If you can provide a fully runnable program with just enough assets as for it to run (the assets can be just placeholders, they don't need to be your original assets), that would help me help y...

goto is a Lua 5.2 thing, and LuaJIT implements it as an extension . However, love.js can't run LuaJIT and runs PUC Lua 5.1 instead, as far as I know, so I'm afraid you're out of luck. You can always try to compile your own PUC Lua 5.1 backporting the goto extension from 5.2, but I guess that's not a...

I was thinking something not too different from what zorg has posted. zorg's code has some bugs and some redundancy, though. - The first two lines should be swapped, otherwise you would always need to pass a string as the second parameter and the second line would be redundant. - The line `if not x ...

If you're using drag and drop, drag the whole folder, not the main.lua file.

Thanks for the answer! Then, does the value of local variable stored in memory in a scope get freed when code exits the scope? Yes, but in the case of simple values (numbers, true, false, nil and the weird lightuserdata type), the allocation happens in the Lua stack, not in the heap. This makes the...

I usually code like (2), because I thought every function call(or every loop) declares local variable and create garbages. However, I mostly see (1) in others' codes. So I started to think I've been misunderstanding this. Is (1) essentially same with (2)? It's not right that local variables create ...

Deterministic physics is a desirable property - I can't help remembering the test that grump proposed: https://love2d.org/forums/viewtopic.php?p=245468#p245468 But it's not always necessary, and all the OP was asking is how to deal with high dt values (aka lag spikes). For that simpler goal, capping...

By the way, here's how to actually calculate the centroid of a polygon:

https://en.wikipedia.org/wiki/Centroid#Of_a_polygon

What I fail to understand, however, is why not to use Body:getPosition().

No problem, I think it's been a misunderstanding and I have to apologize too. I just didn't exactly understand what you had tried. Well, I ran your program after adding a print(object.visible) debug line and the result was nil all the time. So I went on to check where was that 'visible' property def...

Thank you for informing me that ~= is equivalent to not equal to. However the problem I described was having that line never return true, which is a problem because I have some objects visible as 1 and others as 0 which should cause the visible objects to be drawn and the invisible objects to not? ...