[Solved] Colliding with multiple objects!

[PennilessOptimist]

Hello, community! I am new-ish to love (I've used it on and off the past two or so months) and I finally started a permanent project about 2 or 3 weeks ago. My game uses SECS for an object system and Hardon Collider for collision detection.
I've successfully implemented Hardon Collider mostly, except that I cannot think of a way to check multiple objects at once, without having to type every object out (which would be rather redundant and is clearly not an option). I've tried searching the forums, and even saw a few recent posts that had this same problem, but alas none of those threads could help me much!

Colliding isn't an issue, for if you modify the code for moving downwards in entity/Hero.lua to include:

Code: Select all

if love.keyboard.isDown("down") then
	if not self.mask:collidesWith(tilefield[1].mask) --including this bit here
	movementcode
	end --and this

then it clearly works with colliding on the top of tilefield[1] (that is the tile that stands out on the very bottom of the screen).
I was thinking that iterating through the tilefield and checking for the mask and stuff would work out, but I couldn't implement that properly.
I need your help, love community!
I've figured out most of the code for this on my own, as well as with researching, so I'm not sure how efficient my code is. Or rather, I'm not sure how much more efficient my code could be (probably a lot more), so please do tell me if I'm doing anything particularly badly.
Thank you in advance for your time!
Controls are arrow keys for movement, and use the ~ button for console interactions.

[substitute541]

Uh, couldn't you do:

Code: Select all

if love.keyboard.isDown("down") then
   for i=1, #tilefield do
      if not self.mask:collidesWith(tilefield[i].mask)
         movementcode
      end
   end

?

[PennilessOptimist]

Uh, couldn't you do:

Code: Select all

if love.keyboard.isDown("down") then
   for i=1, #tilefield do
      if not self.mask:collidesWith(tilefield[i].mask)
         movementcode
      end
   end

?

Alas, it doesn't! Not only does it not check the collision, but it also just makes the character zoom out of the screen (probably because its repeating the move code however many tiles there are in the tile field.) Iterators like this don't seem to work at all.

[Robin]

Code: Select all

function canmove()
   for i=1, #tilefield do
      if self.mask:collidesWith(tilefield[i].mask)
         return false
      end
   end
   return true
end

-- in love.update:
if love.keyboard.isDown("down") and canmove() then
    movementcode
end

EDIT: or:

Code: Select all

if love.keyboard.isDown("down") then
   for i=1, #tilefield do
      if not self.mask:collidesWith(tilefield[i].mask)
         movementcode
         break
      end
   end

[PennilessOptimist]

Your first suggestion worked, Robin! Thank you very much!
Your second suggestion didn't work, though. I don't know why iterating through them like that doesn't work, but I suppose its a mystery I'll solve later.
Thank both of you very much for the help, though.
Cheers!

[Robin]

Oh, of course, brain fart. The second one moves when it doesn't collide with a single thingy, instead of not colliding with all the thingies.