Whitelist All the Parts In a Model for a Raycast

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#1

I’ve heard of raycast blacklisting but not raycast whitelisting. I’m hoping it’s a thing because it’s only about 5 out of about 1000 parts that I want the raycast to look at. I can’t imagine blacklisting 1000 parts, it’s just impractical. Does anyone know how I can achieve whitelisting just the parts in a model?

How can I make a raycast ignore everything except a part named plot
#2

Try this:

It like they’ve put the parts the ray is allowed to hit into a folder and checked the folder contents, not the entire place.

#4

Is this it:

-- Build a "RaycastParams" object and cast the ray
local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = {caster.Parent}
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)

Raycast parameters?

#5

Yes, you should use Raycast parameters, in raycast “FilterDecendantsInstances” you need to put in the array Model:GetChildren() and in FilterType it needs to be Whilelist, so only the childrens inside the model would be affected by the ray :slight_smile:

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#6

I might be wrong here, but since it’s called “FilterDecendantsInstances” does that mean it automatically selects all the descendants? Because in the docs example it just says {caster.Parent}.

#7

Maybe you could test it, but i think that the “Decendants” are from the hitted parts in the ray, not the thing inside the array, try it or do my method of ModelGetChildren()

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#8

Whitelisting is the same as blacklisting, you just need to change the ‘FilterType’ property of the ‘RaycastParams’ object from Enum.RaycastFilterType.Blacklist to Enum.RaycastFilter.Whitelist.

https://developer.roblox.com/en-us/api-reference/enum/RaycastFilterType

#9

I’ve tested both of them out and both ways seem to work the exact same.

Edit: I printed {script.Parent} -- the model and {script.Parent:GetChildren() -- models parts and here are the results:
image
The first one is script.Parent, the second is the one with :GetChildren()
So it seems if you select a model, it will not add the children to the table but rather make the whole model whitelisted/blacklisted anyway.