How to add Instances to the RaycastParams.FilterDescendantsInstances Array?

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1

Hello! I have a question on how I can add Instances to my Raycast FilterDescendantsInstances array.

I have a gun system using the workspace:Raycast() method in where i’m trying to ignore nearly
transparent/transparent parts. To acheive ignoring transparent parts, I’m having it continiously try a raycast and add transparent parts to the ignore list until the raycast instance is not transparent.

However the issue I am having is I can’t seem to add any new instances to the FilterDescendantsIntances array. I’ve tried testing it by doing:

local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
raycastParams.FilterDescendantsInstances = {character, workspace.IgnoreList}

print(raycastParams["FilterDescendantsInstances"])

table.insert(raycastParams["FilterDescendantsInstances"], workspace.Materials)

print(raycastParams["FilterDescendantsInstances"])

However both those prints printed the same exact same thing and workspace.Materials did not get added into the array.

Does anyone have any ideas on how I can acheive this? Thank you!

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2

Does character or workspace.Ignorelist appear?

If you add workspace.Materials directly to the intial table, like {character, workspace.IgnoreList, workspace.Materials} does that work?

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3

Yes, character and workspace.Ignorelist do appear.

As for the workspace.Materials, it was just test if it would add in the array. Realistically, I would want to be adding transparent part in the array during the game and not preset.

4

You would call the Raycast paramaters at the time of casting your rays instead of trying to create the raycast paramaters and hold onto them. Instead you could make a table that has your list inside of it, add and remove from that table then when you go to raycast you refer the paramaters filter to that table

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5

Yeah, I tried that but I can’t store a table of instances inside FilterDescendantsInstances, if that’s what you meant. Is there any other way you know how to do it?

6 
local part = game.workspace.part
local storedBlackList = {}

table.insert(storedBlackList, part)

local function RayNow() --Some function that tells your system to raycast
local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = storedBlacklist
end

wait(5)
RayNow()
table.remove(storedBlacklist, 1)
wait(3)
RayNow()

So this is just a quick example, but basically if I want to run a raycast with specific black list i’ve got stored then one way we can do that is by having a table, above called storedBlacklist in which we add the part into the list, do a ray, then remove, and run a ray again.
Now this doesn’t actually run a ray, but you can use bindable or remote functions or module scripts to add or remove into the table, so that when you go to run a raycast function it takes the table you’re trying to reference.

Do you have a source code that you’re working with that’s not working?

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7

Oh that snippet cleared it up for me, I forgot I could make the array a seperate variable. Thank you! I should know what to do now.

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