Can you help with Collision Callbacks

[ixjackinthebox]

I have started looking at the CollisionCallbacks tutorial and in it it said on the page

A list of functions you can use on contacts can be found at the Contact page.

and on the contacts page there is Contact:isTouching and i wonder how to use it?

Also how can I find out what fixtures collided with each other?

and if I put this

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function beginContact(fixture_a, fixture_b, coll)
	collA = fixture_a:getUserData()
	collB = fixture_b:getUserData()
end

and then I did

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function love.update(dt)
	if collA == Objects.Player.fixture
		--do stuff
	end

Would that tell me if collA was the same as Objects.Player.fixture

Thanks in advance

[ixjackinthebox]

Anyone???

[benhumphreys]

Please re-read the physics tutorials on the Wiki.

In your code, please note that getUserData() will return you a custom string that you should have set somewhere.

So it will not equal the fixture object.

Here is something I use in my own code:

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-- In setup:
    pillar = {}
        pillar.b = lp.newBody(world, 600,400, "static")
        pillar.s = lp.newRectangleShape(200,200)
        pillar.f = lp.newFixture(pillar.b, pillar.s)
        pillar.f:setRestitution(0.0)
        pillar.f:setFriction(0.8)
        pillar.f:setUserData("some pillar")

-- Then later:
function beginContact(a, b, coll)
  if a:getUserData() == "some pillar" then
    -- do something
  end
end

Hopefully this will help.