FindPartsInRegion3WithIgnoreList

Function of:

Description:

Returns an array of BaseParts in the given DataType/Region3 that aren’t in, or a descendant of an entry in, the given IgnoreList.

This function takes an optional maxParts parameter (default 20) which limits the number of BaseParts that can be returned. Once this number has been reached, the search for BaseParts will stop. This means some BaseParts may not be returned even if they are within the DataType/Region3

If no BaseParts are found, an empty array will be returned.

This function is a variant of Workspace/FindPartsInRegion3 with the addition of an ignore list. This allows the developer to exclude certain BaseParts or Models, for example characters, from the search. Those looking to find BaseParts in a Region3 using a white list, should use Workspace/FindPartsInRegion3WithWhitelist.

How do Region3 checks work?

Checking if a part overlaps a DataType/Region3 is not a simple process. It actually is time consuming and complicated. Instead it checks if parts are roughly in the same area. When this function is called, it figures out which voxels contain the DataType/Region3. It then figures out which parts might be in those voxels. It does this by comparing the axis-aligned bounding box (sometimes called the AABB) of the part with the voxels. The axis-aligned bounding box can be seen in Roblox Studio when a part is selected.

This means that the area that is inspected by the function may be larger than the DataType/Region3. For this reason it is recommended to make sure that the DataType/Region3 is on the voxel grid. The best way to do this is by setting the coordinates of the DataType/Region3 to multiples of 4 (since voxels are 4 x 4 x 4 studs).

This method is a fairly quick and easy way to see if parts are in a general area. If a game needs to know if parts are exactly in an area, then BasePart/GetTouchingParts should be used. There is a higher cost to using BasePart/GetTouchingParts since a part is needed in the Workspace and the function takes more time to run.

Notes

If a nil value is given in the ignore list, instances after this value will not be ignored

Parameters

Name	Type	Default	Description
Name region	Type Region3	Default	Summary The `DataType/Region3` to be checked.
Name ignoreDescendantsTable	Type Objects	Default	Summary An array of objects to be ignored.
Name maxParts	Type int	Default 20	Summary The maximum number of `BasePart`s to be returned.

Returns

Return Type	Summary
Return Type Objects	Summary An array of `BasePart`s found within the `DataType/Region3`.

Code Samples

Find Parts in Region3 Excluding Characters

This code sample includes a function for finding BaseParts within a DataType/Region3 excluding Player characters.

			
				Find Parts in Region3 Excluding Characters
			
				Expected Output
			
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			local Players = game:GetService("Players")

function findPartsExcludingCharacters(region3, maxParts)
	-- build an ignore list of all characters
	local ignoreList = {}
	for _, player in pairs(Players:GetPlayers()) do
		if player and player.Character then
			table.insert(ignoreList, player.Character)
		end
	end	
	-- return region3 search
	return workspace:FindPartsInRegion3WithIgnoreList(region3, ignoreList, maxParts)
end
		
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FindPartsInRegion3WithIgnoreList

How do Region3 checks work?

Notes

Parameters

region

ignoreDescendantsTable

maxParts

Returns

Objects

Code Samples

Find Parts in Region3 Excluding Characters