Bump on it!

This is where we'll configure our collision system using the bump.lua library. bump.lua is a lightweight library that can be found at http://github.com/kikito/bump.lua. Let's edit our previous code and set up the bump. We'll also set up our player to move within the solid world and collide with it. It's a long chunk, so you need to follow the comments to understand what each chunk does!

1. First of all we require the bump library within main.lua:

   bump = require "bump"

2. Next, we define our collision callback function bump.collision(), between two objects:

   function bump.collision(obj1, obj2, dx, dy)

3. Then we define the conditions for a collision between the two objects:

   function bump.shouldCollide(obj1, obj2)

4. With this, we get an object and return its collision boundary, which is usually a rectangle of parameters l, t, w, and h:

   function bump.getBBox(obj)
      return obj.l, obj.t, obj.w, obj.h
   end

We'll come back and fill the blank spaces between these chunks after we have loaded our solid tiles...