BloxCraft 2D Engine Source Code

-- Original code by HELL_WORLD / kaka_228
-- Feel free to improve, but keep the credits!
local p = game.Players.LocalPlayer
local cam = workspace.CurrentCamera
local mouse = p:GetMouse()
local rs = game:GetService("RunService")
local uis = game:GetService("UserInputService")

local bs = 4 
local vd = 20
local ww = 500
local seed = math.random(1, 1e6)

local db = {
    hp = 100,
    m = "mine",
    sel = "Planks",
    inv = {Wood=10, Stone=10, Dirt=10, Planks=10, Stick=0, Coal=0, IronOre=0, IronIngot=0, Diamond=0, Chest=0},
    pwr = 1,
    items = {"Planks", "Dirt", "Stone", "Wood", "Chest"}
}

local w_f = workspace:FindFirstChild("World") or Instance.new("Folder", workspace)
w_f.Name = "World"

local blocks = {} 
local parts = {} 

local cfg = {
    Grass = {c = Color3.fromRGB(90, 160, 70), hp = 0.6, d = "Dirt"},
    Dirt = {c = Color3.fromRGB(120, 85, 55), hp = 0.5, d = "Dirt"},
    Stone = {c = Color3.fromRGB(130, 130, 130), hp = 2.5, d = "Stone"},
    Wood = {c = Color3.fromRGB(110, 75, 45), hp = 1.2, d = "Wood"},
    Planks = {c = Color3.fromRGB(170, 135, 90), hp = 1, d = "Planks"},
    Leaves = {c = Color3.fromRGB(60, 190, 70), hp = 0.3, d = "Stick"},
    Coal = {c = Color3.fromRGB(30, 30, 30), hp = 3, d = "Coal"},
    Iron = {c = Color3.fromRGB(200, 175, 160), hp = 5, d = "IronOre"},
    Diamond = {c = Color3.fromRGB(100, 240, 255), hp = 10, d = "Diamond"},
    Chest = {c = Color3.fromRGB(140, 100, 50), hp = 1.5, d = "Chest"},
    Bedrock = {c = Color3.fromRGB(15, 15, 15), hp = 1e6, d = nil}
}

local function gen()
    math.randomseed(seed)
    for x = -ww/2, ww/2 do
        local sy = math.floor(math.noise(x * 0.05, seed) * 12) + 60
        for y = 0, sy do
            local cv = math.noise(x * 0.1, y * 0.1, seed)
            if cv < 0.48 or y >= sy - 1 then
                local t = "Stone"
                if y == sy then t = "Grass"
                elseif y > sy - 4 then t = "Dirt"
                elseif y == 0 then t = "Bedrock"
                else
                    local r = math.random(1, 1000)
                    if r < 10 then
                        local dp = sy - y
                        if dp > 45 and r < 3 then t = "Diamond"
                        elseif dp > 20 and r < 6 then t = "Iron"
                        else t = "Coal" end
                    end
                end
                blocks[x.."_"..y] = t
            end
        end
        if math.random(1, 12) == 1 then
            local h = math.random(4, 6)
            for i = 1, h do blocks[x.."_"..(sy+i)] = "Wood" end
            for lx = -1, 1 do 
                for ly = 1, 2 do blocks[(x+lx).."_"..(sy+h+ly)] = "Leaves" end
            end
        end
    end
end

local gui = Instance.new("ScreenGui", game.CoreGui)
local hud = Instance.new("Frame", gui)
hud.Size = UDim2.new(0, 320, 0, 40)
hud.Position = UDim2.new(0.5, -160, 0, 10)
hud.BackgroundTransparency = 0.5
hud.BackgroundColor3 = Color3.new(0,0,0)

local function btn(txt, pos, pnt)
    local b = Instance.new("TextButton", pnt)
    b.Size = UDim2.new(0, 80, 1, 0)
    b.Position = pos
    b.Text = txt
    b.BackgroundColor3 = Color3.new(0.2, 0.2, 0.2)
    b.TextColor3 = Color3.new(1,1,1)
    b.BorderSizePixel = 0
    return b
end

local m_btn = btn("MINE", UDim2.new(0,0,0,0), hud)
local s_btn = btn("BLOCK: "..db.sel, UDim2.new(0,90,0,0), hud)
local c_btn = btn("CRAFT", UDim2.new(0,180,0,0), hud)

local main = Instance.new("Frame", gui)
main.Size = UDim2.new(0, 260, 0, 300)
main.Position = UDim2.new(0.5, -130, 0.5, -150)
main.Visible = false
main.BackgroundColor3 = Color3.new(0.1, 0.1, 0.1)

local scroll = Instance.new("ScrollingFrame", main)
scroll.Size = UDim2.new(1, -10, 1, -10)
scroll.Position = UDim2.new(0, 5, 0, 5)
scroll.BackgroundTransparency = 1
Instance.new("UIListLayout", scroll).Padding = UDim.new(0, 5)

local recipes = {
    {n="Planks (1 Wood)", r={Wood=1}, g={Planks=4}},
    {n="Sticks (2 Planks)", r={Planks=2}, g={Stick=4}},
    {n="Stone Pick (3 Stone)", r={Stick=2, Stone=3}, p=3},
    {n="Iron Pick (3 Iron)", r={Stick=2, IronIngot=3}, p=7}
}

local function refresh()
    for _, v in pairs(scroll:GetChildren()) do if v:IsA("TextButton") then v:Destroy() end end
    for _, r in pairs(recipes) do
        local b = Instance.new("TextButton", scroll)
        b.Size = UDim2.new(1, 0, 0, 35)
        b.Text = r.n
        b.MouseButton1Click:Connect(function()
            local ok = true
            for k, v in pairs(r.r) do if (db.inv[k] or 0) < v then ok = false end end
            if ok then
                for k, v in pairs(r.r) do db.inv[k] -= v end
                if r.g then for k, v in pairs(r.g) do db.inv[k] = (db.inv[k] or 0) + v end end
                if r.p then db.pwr = r.p end
                refresh()
            end
        end)
    end
end

m_btn.MouseButton1Click:Connect(function()
    db.m = (db.m == "mine") and "build" or "mine"
    m_btn.Text = db.m:upper()
    m_btn.BackgroundColor3 = (db.m == "mine") and Color3.new(0.2,0.2,0.2) or Color3.new(0,0.4,0)
end)

s_btn.MouseButton1Click:Connect(function()
    local i = table.find(db.items, db.sel) or 1
    db.sel = db.items[i % #db.items + 1]
    s_btn.Text = "BLOCK: "..db.sel
end)

c_btn.MouseButton1Click:Connect(function() main.Visible = not main.Visible refresh() end)

local curB, mt = nil, 0
uis.InputBegan:Connect(function(i, g)
    if g then return end
    if i.UserInputType == Enum.UserInputType.MouseButton1 or i.UserInputType == Enum.UserInputType.Touch then
        if not mouse.Target then return end
        if db.m == "mine" then
            if mouse.Target.Parent == w_f then curB = mouse.Target; mt = 0 end
        else
            if (db.inv[db.sel] or 0) > 0 then
                local pz = mouse.Target.Position + (Vector3.FromNormalId(mouse.TargetSurface) * bs)
                local id = math.round(pz.X/bs).."_"..math.round(pz.Y/bs)
                if not blocks[id] then
                    blocks[id] = db.sel
                    db.inv[db.sel] -= 1
                end
            end
        end
    end
end)

uis.InputEnded:Connect(function(i) if i.UserInputType == Enum.UserInputType.MouseButton1 then if curB then curB.Transparency = 0 end curB = nil end end)

rs.RenderStepped:Connect(function(dt)
    local char = p.Character
    if not char or not char:FindFirstChild("HumanoidRootPart") then return end
    local hrp = char.HumanoidRootPart

    if hrp.Position.Y < -60 then hrp.CFrame = CFrame.new(0, 250, 0) end

    if curB and curB.Parent and db.m == "mine" then
        mt += dt
        local h = (cfg[curB.Name].hp or 1) / db.pwr
        curB.Transparency = math.clamp(mt/h, 0, 0.7)
        if mt >= h then
            local id = math.round(curB.Position.X/bs).."_"..math.round(curB.Position.Y/bs)
            if cfg[curB.Name].d then db.inv[cfg[curB.Name].d] = (db.inv[cfg[curB.Name].d] or 0) + 1 end
            blocks[id] = nil
            curB:Destroy()
            curB = nil
        end
    end

    local cx, cy = math.round(hrp.Position.X/bs), math.round(hrp.Position.Y/bs)
    for x = cx - vd, cx + vd do
        for y = cy - vd, cy + vd do
            local id = x.."_"..y
            if blocks[id] and not parts[id] then
                local b = Instance.new("Part")
                b.Size = Vector3.new(bs, bs, bs)
                b.Position = Vector3.new(x*bs, y*bs, 0)
                b.Anchored = true
                b.Name = blocks[id]
                b.Color = cfg[blocks[id]].c
                b.Material = (blocks[id] == "Grass" or blocks[id] == "Leaves") and Enum.Material.Grass or Enum.Material.Slate
                b.Parent = w_f
                parts[id] = b
            end
        end
    end

    for id, obj in pairs(parts) do
        local px, py = id:match("([%-?%d]+)_([%-?%d]+)")
        if math.abs(tonumber(px) - cx) > vd + 2 or math.abs(tonumber(py) - cy) > vd + 2 then
            obj:Destroy()
            parts[id] = nil
        end
    end

    cam.CameraType = Enum.CameraType.Scriptable
    cam.CFrame = cam.CFrame:Lerp(CFrame.new(hrp.Position.X, hrp.Position.Y + 5, 32), 0.15)
    hrp.CFrame = CFrame.new(hrp.Position.X, hrp.Position.Y, 0) * CFrame.Angles(0, math.rad(90), 0)
end)

gen()
local function spawnP()
    local c = p.Character or p.CharacterAdded:Wait()
    local r = c:WaitForChild("HumanoidRootPart")
    r.CFrame = CFrame.new(0, 250, 0)
end
spawnP()
p.CharacterAdded:Connect(spawnP)