Request for help on collision callbacks

[invisisci]

Hi all,

OK, so I've done this:

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function load()
	world = love.physics.newWorld(2000, 2000)
	world:setCallback(collision)

...and then I've used:

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body1.circleShape:setData("foo")
body2.circleShape:setData("bar")

...on my collision shapes.

Finally, I've implemented the collision handler:

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function collision(a, b, c) 
	collisionDebugMsg = "Collided: " .. a .. " + " .. b

When body1 and body 2 collide, collision(a,b,c) is called correctly. "a" and "b" contain the shape data, as expected:

Collided: foo + bar

My question is: What is "c"? I get an error if I try to cat it in my collisionDebugMsg. I can't find any info in the physics documentation. I tried scanning the Box2D manual, but that didn't help me either. I'm sure I'm missing something obvious... anyway my overall goal is to get a hold of the specific shape instance that is colliding, so I can do things to it (I have many "body1" objects instantiated). I'm assuming c is some kind of contact object that I can use to find the actual objects that are colliding?

I'm investigating further, but I thought I'd post my query while I keep looking.

[invisisci]

OK never mind, I figured it out.