Merge pull request #87 from wraithan/readme-cleanup

cleaned up readme (spelling and example code)

Author: kumavis

README.md

@@ -162,7 +162,7 @@ shoots a ray and collides with voxels
 
 `gameInstance.raycastVoxels(start, position, distance)`
 
-if you just type `gameInstance.raycastVoxels()` it will default to using the current main camera position and direction, and default distance of 10, and epilson of `1e-8`
+if you just type `gameInstance.raycastVoxels()` it will default to using the current main camera position and direction, and default distance of 10, and epsilon of `1e-8`
 
 you will get back an object with the precise position, voxel position, direction, face normal and voxel value of the voxel that you intersected, or `false` if there was no collision
 
@@ -305,11 +305,11 @@ this should be generated by something like this:
   var length = 5, width = 5, depth = 5
   var start = [10, 10, 10]
   var voxels = new Int8Array(length * width * depth)
-  var idx = 
-  for(var z = start[2]; z < depth[2]; ++z)
-  for(var y = start[1]; y < height[1]; ++y)
-  for(var x = start[0]; x < length[0]; ++x, ++idx) {
-    voxels[idx] = getVoxelDataFor(x, y, z)
+  var idx = 0
+  for(var z = start[2]; z < depth; ++z)
+  for(var y = start[1]; y < height; ++y)
+  for(var x = start[0]; x < length; ++x, ++idx) {
+    voxels[idx] = getVoxelDataFor(x+start[0], y+start[1], z+start[2])
   }
   return {voxels: voxels, dimensions: [length, width, height], position: start}
 ```
@@ -336,7 +336,7 @@ var clearInterval = game.setInterval(function() {
 // later we can stop the interval by calling clearInterval()
 ```
 
-Will achieve the same thing although now when the game's frame rate drops the `jump()` funciton won't be called repeatedly and the object will jump at the desired frequency.
+Will achieve the same thing although now when the game's frame rate drops the `jump()` function won't be called repeatedly and the object will jump at the desired frequency.
 
 ## style guide