DraygonTensor - example Lua script

boot.lua

function init()
  print("Script: init called!")

  cam = Script.spawn_prefab("player", Vector3(0, 0, 0))
  Script.spawn_prefab("box", Vector3(0, 0, -10))
end

function shutdown()
  print("Script: shutdown called!")
end

function update(deltaTime)
  local camOrientation = Quaternion.normalize(Script.get_local_orientation(cam))
  local mouseDeltaX, mouseDeltaY = Input.get_mouse_delta_xy()
  local yawDelta = Quaternion.create_from_axis_angle(Vector3.unit_y(), -mouseDeltaX * deltaTime)
  local pitchDelta = Quaternion.create_from_axis_angle(Vector3.unit_x(), -mouseDeltaY * deltaTime)
  camOrientation = (yawDelta * camOrientation * pitchDelta)
  Script.set_local_orientation(cam, Quaternion.normalize(camOrientation))

  local temp = Vector4.normalize(Vector4.transform(-Vector4.unit_z(), Matrix4.create_from_quaternion(camOrientation)))
  local camFwd = Vector3(temp:get_x(), temp:get_y(), temp:get_z())
  local temp = Vector4.normalize(Vector4.transform(Vector4.unit_y(), Matrix4.create_from_quaternion(camOrientation)))
  local camUp = Vector3(temp:get_x(), temp:get_y(), temp:get_z())
  local temp = Vector4.normalize(Vector4.transform(Vector4.unit_x(), Matrix4.create_from_quaternion(camOrientation)))
  local camRight = Vector3(temp:get_x(), temp:get_y(), temp:get_z())
  
  local wishDir = Vector3(0, 0, 0)
  if (Input.is_key_pressed("w")) then
    wishDir = wishDir + camFwd
  end
  if (Input.is_key_pressed("s")) then
    wishDir = wishDir - camFwd
  end
  if (Input.is_key_pressed("a")) then
    wishDir = wishDir - camRight
  end
  if (Input.is_key_pressed("d")) then
    wishDir = wishDir + camRight
  end

  if (Vector3.magnitude(wishDir) > 0) then
    wishDir = Vector3.normalize(wishDir)
    wishDir = wishDir * deltaTime * 10
  end

  Script.set_local_translation(cam, Script.get_local_translation(cam) + wishDir);

  -- -- Handle messages
  -- while Script.is_next_message() do
  --   local msg = Script.get_next_message()
  --   print(msg.type)
  -- end
end

function render()
  --print("Script: render called!")
end