initial commit

.gitignore

@@ -0,0 +1,12 @@
+# ignore executables
+*
+!*.*
+!*/
+
+*.so
+*.dll
+*.exe
+*.trace
+
+data/scripts/twnapi.lua
+build/

data/scripts/game.lua

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+-- called every frame, with constant delta time
+function game_tick()
+  -- ctx.initialization_needed is true first frame and every time dynamic reload is performed
+  if ctx.initialization_needed then
+    -- ctx.udata persists on reload
+    ctx.udata = {}
+  end
+end

data/scripts/types/vector3.lua

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+local Vector3 = {
+  x = 0,
+  y = 0,
+  z = 0,
+
+  _CLASS_ = "Vector3"
+}
+
+setmetatable(Vector3, Vector3)
+
+local function is_weak_vector3(t)
+  if type(t) ~= "table" then return false end
+
+  local haskeys = t.x ~= nil and t.y ~= nil and t.z ~= nil
+  if not haskeys then
+    return type(t[1]) == "number" and type(t[2]) == "number" and type(t[3]) == "number"
+  else
+    return type(t.x) == "number" and type(t.y) == "number" and type(t.z) == "number"
+  end
+end
+
+function Vector3:__mul(b)
+  if type(b) == "number" then
+    return Vector3{
+      x = self.x * b,
+      y = self.y * b,
+      z = self.z * b,
+    }
+  elseif type(b) == "table" and is_weak_vector3(b) then
+    local other = Vector3(b)
+    return Vector3{
+      self.x * other.x,
+      self.y * other.y,
+      self.z * other.z,
+    }
+  end
+
+  error("Vector3: other must be either a number or a Vector3-like table.")
+  return Vector3()
+end
+
+function Vector3:__div(b)
+  if type(b) == "number" then
+    return Vector3{
+      x = self.x / b,
+      y = self.y / b,
+      z = self.z / b,
+    }
+  elseif type(b) == "table" and is_weak_vector3(b) then
+    local other = Vector3(b)
+    return Vector3{
+      self.x / other.x,
+      self.y / other.y,
+      self.z / other.z,
+    }
+  end
+
+  error("Vector3: other must be either a number or a Vector3-like table.")
+  return Vector3()
+end
+
+function Vector3:__add(b)
+  if not is_weak_vector3(b) then
+    error("Vector3: other must be a Vector3-like table.")
+    return self
+  end
+  local other = Vector3(b)
+  return Vector3{
+    self.x + other.x,
+    self.y + other.y,
+    self.z + other.z,
+  }
+end
+
+function Vector3:__sub(b)
+  if not is_weak_vector3(b) then
+    error("Vector3: other must be a Vector3-like table.")
+    return self
+  end
+  local other = Vector3(b)
+  return Vector3{
+    self.x - other.x,
+    self.y - other.y,
+    self.z - other.z,
+  }
+end
+
+function Vector3:__unm()
+  return Vector3{
+    -self.x,
+    -self.y,
+    -self.z,
+  }
+end
+
+function Vector3:__call(...)
+  local args = {...}
+  local nv = {x = 0, y = 0, z = 0}
+  setmetatable(nv, Vector3)
+  if type(args[1]) == "number" then
+    if #args == 1 then
+      nv.x, nv.y, nv.z = args[1], args[1], args[1]
+    else
+      nv.x, nv.y, nv.z = args[1], args[2], args[3]
+    end
+  elseif type(args[1]) == "table" then
+    if args[1].x ~= nil then
+      nv.x, nv.y, nv.z = args[1].x, args[1].y, args[1].z
+    else
+      nv.x, nv.y, nv.z = args[1][1], args[1][2], args[1][3]
+    end
+  end
+  return nv
+end
+
+function Vector3:__tostring()
+  return "Vector3(" .. tostring(self.x) .. ", " .. tostring(self.y) .. ", " .. tostring(self.z) .. ")"
+end
+
+Vector3.__index = Vector3
+
+
+--------API--------
+function Vector3:length_squared()
+  local x2 = self.x * self.x
+  local y2 = self.y * self.y
+  local z2 = self.z * self.z
+
+  return x2 + y2 + z2
+end
+
+function Vector3:length()
+  return math.sqrt(self:length_squared())
+end
+
+function Vector3:normalized()
+  local length = math.sqrt(self:length_squared())
+  if length == 0 then
+    return Vector3()
+  end
+  return Vector3(self.x / length, self.y / length, self.z / length)
+end
+
+function Vector3:dot(with)
+  if not is_weak_vector3(with) then
+    error("Vector3: with must be a Vector3-like table. Returning 0")
+    return 0
+  end
+
+  local v2 = Vector3(with)
+  return self.x * v2.x + self.y * v2.y + self.z * v2.z
+end
+
+function Vector3:cross(with)
+  if not is_weak_vector3(with) then
+    error("Vector3: with must be a Vector3-like table. Returning Vector3()")
+    return Vector3()
+  end
+  local v2 = Vector3(with)
+  return Vector3 {
+    self.y * v2.z - self.z * v2.y,
+    self.z * v2.x - self.x * v2.z,
+    self.x * v2.y - self.y * v2.x,
+  }
+end
+
+---- CONSTANTS
+
+Vector3.UP = Vector3(0, 1, 0)
+Vector3.DOWN = -Vector3.UP
+Vector3.FORWARD = Vector3(0, 0, -1)
+Vector3.BACK = -Vector3.FORWARD
+Vector3.RIGHT = Vector3(1, 0, 0)
+Vector3.LEFT = -Vector3.RIGHT
+
+-------------------
+return Vector3

data/twn.toml

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+# This file contains everything about the engine and your game that can be
+# configured before it runs.
+#
+# Optional settings are commented out, with their default values shown.
+# Invalid values in these settings will be ignored.
+
+# Data about your game as an application
+[about]
+title = "quack2"
+developer = "yag"
+app_id = "quack2"
+dev_id = "yag"
+
+# Game runtime details
+[game]
+resolution = [ 640, 480 ]
+interpreter = "$TWNROOT/apps/twnlua"
+background_color = [0, 0, 0, 1]
+#debug = true
+
+# Engine tweaks. You probably don't need to change these
+[engine]
+#ticks_per_second = 60 # minimum of 8
+#keybind_slots = 3 # minimum of 1
+#texture_atlas_size = 2048 # minimum of 32
+#font_texture_size = 2048 # minimum of 1024
+#font_oversampling = 4 # minimum of 0
+#font_filtering = "linear" # possible values: "nearest", "linear"