Using the world callback?

[conman420]

I'm basically trying to get when the players shape collides with another shape, I guess the world collision callback does this but does it take any arguments? I couldn't see them in the documentation if it did and I've tried retrieving them manually, it seems it takes 2 arguments, but I cannot identify what they are.

Any help is appreciated

[rude]

Ah, I've been documenting that today. (Not uploaded yet). I'm sorry the documentation isn't complete.

You basically do this:

Code: Select all

s1 = love.physics.newCircleShape( body1, 20 )
s1:setData("Shape 1")

s2 = love.physics.newCircleShape( body2, 20 )
s2:setData("Shape 2")

world:setCallback(collision)

function collision(a, b, c)
  print(a .. " with " .. b)
end

The first two arguments is whatever data you set with shape:setData. The third is a Contact object with contact point data.

[conman420]

Ahh no problem

Saves me messing with metatables and loops to find out what the args were.

Now I can finally finish my first game

[conman420]

Also is there a way of retrieving if any key is being pressed?

[rude]

Of course. love.keyboard.isDown. See constants for key symbols.

[conman420]

You misunderstood - unless I'm missing something - I mean ANY key as in any of them. Of course I could loop through every key in there but that would be tedious.

One last question

Is there a velocity limit in the physics engine? My falling boxes of doom seem to not go past a certain speed.

[rude]

Any key:

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keynum = 0

function keypressed(k)
  keynum = keynum + 1
end

function keyreleased(k)
  keynum = keynum - 1
end

function isAnyKeyDown()
  return keynum > 0
end

Is there a velocity limit in the physics engine? My falling boxes of doom seem to not go past a certain speed.

There is no limit that I'm aware of.

EDIT: typo

[Merkoth]

Correctme if I'm wrong, but wouldn't the keypressed() and keyreleased() callbacks do the trick too?

[rude]

I think he wants to know if any key is down at any time.