Terrain Generator

local sprite = require "sprite"

local createMap(self, size, columns, rows)
        local map = display.newGroup()
        map.Tiles = {}
        for row=0,rows+1 do
                map.Tiles[row] = {}
                for column=0,columns+1 do
                        local tile = sprite.newSprite(self)
                        tile:setReferencePoint(display.BottomLeftReferencePoint)
                        map:insert(tile)
                        tile.xScale, tile.yScale = size / tile.width, size / tile.height
                        tile.x, tile.y = column * size, row * size
                        map.Tiles[row][column] = tile
                end
        end
        return map
end

return function(spritesheet, size, kinds)
    local terrain = sprite.newSpriteSet(sprite.newSpriteSheet(spritesheet,  size, size), 1, 1)
    for i, kind in ipairs(kinds) do
        sprite.add(terrain, kind, i + 1, 1, 1, 1)
    end
    terrain.Create = createMap
    return terrain
end