unnamed/world.lua

-- bring in the util module
local util = require("util")

-- world stuffs
local world = {}
    -- create a new world with given depth and width
    function world.new(width, depth, height)
        world.width = width
        world.depth = depth
        world.height = height
        world.hover = nil
        world.select = love.graphics.newImage("img/tiles/select.png")

        for x = 1, world.width do
            world[x] = {}
            for y = 1, world.depth do
                world[x][y] = {}
                for z = 1, world.height do
                    world[x][y][z] = "air"
                end
            end
        end
    end

    -- generates a world, should be called after world.new()
    function world.generate()
        -- draw the bottom layer of dirt
        for x = 1, world.width do
            for y = 1, world.depth do
                world[x][y][1] = "dirt"
            end
        end
        -- draw the grass
        for x = 1, world.width do
            for y = 1, world.depth do
                world[x][y][2] = "grass"
            end
        end
        -- draw a stream
        for x = 1, world.width do
            world[x][5][2] = "water"
        end
    end

    -- load the tile files
    function world.loadTiles()
        world.tiles = {}
        world.tiles.grass = love.graphics.newImage("img/tiles/grass.png")
        world.tiles.dirt = love.graphics.newImage("img/tiles/dirt.png")
        world.tiles.water = love.graphics.newImage("img/tiles/water.png")
        world.tiles.nothing = love.graphics.newImage("img/tiles/nothing.png")
    end

    -- render the world
    function world.render(offset)
        for x = 1, world.width do
            for y = 1, world.depth do
                for z = 1, world.height do 
                    local tile = world[x][y][z]
                    local loc = util.cartToIso({x = x, y = y})
    
                    if tile == "grass" then 
                        image = world.tiles.grass
                    elseif tile == "dirt" then
                        image = world.tiles.dirt
                    elseif tile == "water" then
                        image = world.tiles.water
                    elseif tile == "air" then
                        image = nil
                    else 
                        image = world.tiles.nothing
                    end
                    
                    if image ~= nil then
                        love.graphics.draw(image, loc.x * 16 + offset.x, loc.y * 16 + offset.y - z * 16)
                    end
                end
            end
        end

        if world.hover ~= nil then
            love.graphics.draw(world.select, world.hover.x, world.hover.y)
        end
    end

return world