LuaRenderObject.prototype or prototypes.animation

[jurgy]

I'm trying to get the number of frames in an animation. It's stored as the frame_count property of the animation prototype but I believe there's no way to get the prototype of a LuaRenderObject.

There's neither a LuaRenderObject.prototype field nor a table in the prototypes object that contains the animation prototypes.

Let me know if I'm mistaken, but if not, can you please add an interface in the API

Thanks!

[Bilka]

What do you want to use the frame_count for?

[curiosity]

https://lua-api.factorio.com/latest/cla ... #animation
The exact same property name as on creation.

Or if you mean that animation prototypes are missing from runtime entirely, you should rephrase your request to ask for that.

[jurgy]

What do you want to use the frame_count for?

I posted another interface request for pausing/restarting animations. In that thread I talked about a script work around. That solution requires the frame count such that you can calculate the frame the animation should be at.

The code is still work in progress, but here's what I currently have to give you an idea:

Code: Select all

local AnimationWrapper = {}
AnimationWrapper.__index = AnimationWrapper

function AnimationWrapper.new(lua_render_object, frame_count)
  local self = setmetatable({}, AnimationWrapper)
  self.animation = lua_render_object
  self.base_speed = 1
  self.paused_frame = nil
  self.last_start_tick = game.tick
  self.frame_count = frame_count

  self.animation.animation_speed = self.base_speed
  self.animation.animation_offset = (game.tick * self.base_speed) % self.frame_count
  return self
end

-- Pause the animation.
-- Capture the current displayed frame and stop the animation.
function AnimationWrapper:pause()
  local current_tick = game.tick

  local current_frame = (self.animation.animation_offset + current_tick * self.base_speed) % self.frame_count
  self.paused_frame = current_frame

  self.animation.animation_speed = 0
  self.animation.animation_offset = current_frame
end

function AnimationWrapper:start()
  local current_tick = game.tick
  self.animation.animation_speed = self.base_speed
  if self.paused_frame then
    self.animation.animation_offset = (self.paused_frame - current_tick * self.base_speed) % self.frame_count
  else
    self.animation.animation_offset = (current_tick * self.base_speed) % self.frame_count
  end
  self.last_start_tick = current_tick
  self.paused_frame = nil
end

function AnimationWrapper:set_speed(new_speed)
  local current_tick = game.tick
  if self.animation.animation_speed ~= 0 then

    local current_frame = (self.animation.animation_offset + current_tick * self.base_speed) % self.frame_count
    self.base_speed = new_speed
    self.animation.animation_speed = new_speed

    self.animation.animation_offset = (current_frame - current_tick * new_speed) % self.frame_count
    self.last_start_tick = current_tick
  else
    self.base_speed = new_speed
    self.animation.animation_speed = 0
  end
end

return AnimationWrapper

[jurgy]

https://lua-api.factorio.com/latest/cla ... #animation
The exact same property name as on creation.

Or if you mean that animation prototypes are missing from runtime entirely, you should rephrase your request to ask for that.

Yeah, the animation prototype is afaik missing entirely from the runtime. As to why I need the prototype; I need the frame_count of an animation which is stored in it.