lua cutscene help | Mt. Celeste Climbing Association | Page 1

quasi slate Jul 22, 2022, 9:01 PM

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i just want a simple lua cutscene that causes an on screen dash block to break, how would i accomplish this?

main obsidian Jul 22, 2022, 9:11 PM

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call its Break() method

quasi slate Jul 22, 2022, 9:22 PM

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i've never worked with lua before but what specifically would i write to do that

main obsidian Jul 22, 2022, 9:30 PM

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are you familiar with the C# side of celeste modding? you can do local celeste = require("#celeste") in your cutscene and then you can call any c# methods in there. in this case you probably want to use the Tracker to get the dash block (unless there's multiple dash blocks in the room, in which case you'll need some more fuckery) and call its Break method

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although I'm actually not sure how to call generic methods from lua

quasi slate Jul 22, 2022, 9:32 PM

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i'll just open ilspy and see if that works

main obsidian Jul 22, 2022, 9:32 PM

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from a C# side, what you want to do is player.Scene.Tracker.GetEntity<DashBlock>().Break()

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I'm just not sure how to do the GetEntity call in lua rn

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oh there's a helper function for this

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getEntity("DashBlock"):break() should work I think

quasi slate Jul 22, 2022, 9:37 PM

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local celeste = require("#celeste")
function onBegin()
        getEntity("DashBlock"):break()
end

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this is what i have

main obsidian Jul 22, 2022, 9:37 PM

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you don't even need the celeste import anymore

quasi slate Jul 22, 2022, 9:38 PM

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doesn't seem to be responsive

main obsidian Jul 22, 2022, 9:38 PM

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oh it probably has to be Break, whoops

quasi slate Jul 22, 2022, 9:46 PM

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(07/22/2022 17:45:29) [Everest] [Error] [Lua Cutscenes] Failed to resume coroutine
--------------------------------
Detailed exception log:
--------------------------------
NLua.Exceptions.LuaScriptException: Invalid arguments to method: DashBlock.Break
stack traceback:
    [C]: in function 'coroutine.resume'
    [string "Mods/LuaCutscenes.zip/Assets/LuaCutscenes/cut..."]:6: in function <[string "Mods/LuaCutscenes.zip/Assets/LuaCutscenes/cut..."]:5>
   at Celeste.Mod.LuaCoroutine.MoveNext() in /home/vsts/work/1/s/Celeste.Mod.mm/Mod/Helpers/LuaCoroutine.cs:line 21
   at Celeste.Mod.LuaCutscenes.LuaHelper.SafeMoveNext(LuaCoroutine enumerator)
(07/22/2022 17:45:31) [Everest] [Error] [Lua Cutscenes] Failed to resume coroutine
--------------------------------
Detailed exception log:
--------------------------------
NLua.Exceptions.LuaScriptException: Invalid arguments to method: DashBlock.Break
stack traceback:
    [C]: in function 'coroutine.resume'
    [string "Mods/LuaCutscenes.zip/Assets/LuaCutscenes/cut..."]:6: in function <[string "Mods/LuaCutscenes.zip/Assets/LuaCutscenes/cut..."]:5>
   at Celeste.Mod.LuaCoroutine.MoveNext() in /home/vsts/work/1/s/Celeste.Mod.mm/Mod/Helpers/LuaCoroutine.cs:line 21
   at Celeste.Mod.LuaCutscenes.LuaHelper.SafeMoveNext(LuaCoroutine enumerator)

main obsidian Jul 22, 2022, 9:46 PM

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oh whoops Break needs arguments yeah

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signature is public void Break(Vector2 from, Vector2 direction, bool playSound = true, bool playDebrisSound = true)

quasi slate Jul 22, 2022, 9:47 PM

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(07/22/2022 17:47:27) [Everest] [Error] [Lua Cutscenes] Failed to load cutscene in Lua: attempt to call a nil value

main obsidian Jul 22, 2022, 9:47 PM

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when a dash block is broken normally, from is the player's position and direction is the dash direction

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what does your cutscene look like now?

quasi slate Jul 22, 2022, 9:49 PM

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nothing happens

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it just gives an error

main obsidian Jul 22, 2022, 9:49 PM

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I mean what is the new code

quasi slate Jul 22, 2022, 9:49 PM

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local celeste = require("#celeste")
function onBegin()
    public void Break(Vector2 from, Vector2 direction, bool playSound = true, bool playDebrisSound = true)
end

main obsidian Jul 22, 2022, 9:50 PM

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oh maddyS I just copied the c# signature to show you what parameters it takes

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you need to give it the right arguments

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specifically you need to give it vectors for from and direction

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the others you can leave out

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
    public void Break(Vector2(0, 0), Vector2(0, 0))
end

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trie this, but with a sensible position for the first vector

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the second is ignored I think

quasi slate Jul 22, 2022, 9:55 PM

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
    public void Break(Vector2(-52, 1430), Vector2(0, 0))
end

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still getting the nil value error

main obsidian Jul 22, 2022, 9:55 PM

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oh I copied too much of your cutscene

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
getEntity("DashBlock"):Break(Vector2(-52, 1430), Vector2(0, 0))
end

quasi slate Jul 22, 2022, 9:56 PM

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it worked, thank you very much lol

main obsidian Jul 22, 2022, 9:56 PM

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gladeline

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note that if there's multiple dash blocks in the room, finding the right one is more complicated

quasi slate Jul 22, 2022, 10:02 PM

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im noticing that but im gonna try and just make it one if i can

main obsidian Jul 22, 2022, 10:03 PM

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you could use fancy dash blocks for the others or smth

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nvm that, they're tracked as dash blocks

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yeah you'd probably have to check for entity ID or something like that

quasi slate Jul 22, 2022, 10:07 PM

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what would i add for that

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it appears this room has a lot of dash blocks

main obsidian Jul 22, 2022, 10:11 PM

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
    for i, block in getEntities("DashBlock") do
        if block:id:ID == 1234 then
          block:Break(Vector2(-52, 1430), Vector2(0, 0))
        end
    end
end

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try something like this?

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with the correct ID obv

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nvm hold on, this is python syntax

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
    for i, block in pairs(getEntities("DashBlock")) do
        if block:id:ID == 1234 then
          block:Break(Vector2(-52, 1430), Vector2(0, 0))
        end
    end
end

upper jetty Jul 22, 2022, 10:19 PM

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does just accessing private fields work like that in lua cutscenes thinkeline

main obsidian Jul 22, 2022, 10:20 PM

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idk, it looked like one of the helper functions does so

quasi slate Jul 22, 2022, 10:20 PM

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some more nil value stuff

main obsidian Jul 22, 2022, 10:21 PM

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can you post the exact error?

quasi slate Jul 22, 2022, 10:22 PM

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(07/22/2022 18:20:15) [Everest] [Error] [Lua Cutscenes] Failed to load cutscene in Lua: attempt to call a nil value

main obsidian Jul 22, 2022, 10:23 PM

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no detailed exception log?

quasi slate Jul 22, 2022, 10:23 PM

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nop

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tried requiring celeste, nothing

main obsidian Jul 22, 2022, 10:23 PM

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requiring celeste doesn't do anything unless you need to use it

quasi slate Jul 22, 2022, 10:24 PM

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ah

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gonna go eat but if you figure it out lmk

quasi slate Jul 22, 2022, 10:43 PM

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        if block:id:ID == 1234 then

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is there anything wrong with this line

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it mentioning id twice is 🤨

quasi slate Jul 22, 2022, 11:09 PM

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i tried replacing the id with the entity's index and that didnt work either

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
    setFlag("brokenBlock", true)
    for i, block in pairs(getEntities("DashBlock")) do
        if block:id:ID == 916 then
          block:Break(Vector2(155, 1385), Vector2(0, 0))
        end
    end
end

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just gonna drop the code im working with here

main obsidian Jul 22, 2022, 11:22 PM

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quasi slate it mentioning id twice is 🤨

it's bc it has a field called id, which is a struct with a field called ID

quasi slate Jul 22, 2022, 11:24 PM

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could checking another entity property work?

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if it being an id check is causing the problem

main obsidian Jul 23, 2022, 12:00 AM

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you could check X and Y I guess

quasi slate Jul 23, 2022, 2:13 AM

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hmm that gives the exact same error

quasi slate Jul 23, 2022, 11:40 AM

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local Vector2 = require("#microsoft.xna.framework.vector2")
function onBegin()
  setFlag("brokenBlock", true)
  for i, block in pairs(getEntities("DashBlock")) do
    if blockY == 2008 then
      block:Break(Vector2(155, 1385), Vector2(0, 0))
        end
    end
end

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this gives no nil value error

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but nothing happens either

main obsidian Jul 23, 2022, 12:02 PM

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block:Y, not blockY

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oh block.Y actually

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speaking of, try block.id.ID instead of the colons

quasi slate Jul 23, 2022, 12:22 PM

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nothing happened

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no error either

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i found a way to do something similar with a rumble trigger and rumble block

#lua cutscene help