How do you detect multiple instances with the new Raycasting method?

Help and Feedback Scripting Support
#1

So with the old method you could use this function to detect multiple instances.

OLD METHOD 
function findAllPartsOnRay(ray)
	local targets = {}
	repeat
		local target = game.Workspace:FindPartOnRayWithIgnoreList(ray, targets)
		if target then
			table.insert(targets, target)
		end
	until not target
	return targets
end

But as you all know, Ray.new() was deprecated so how can I mimic this old functionality.

So that this firebreath attack can hit multiple dummies.

CODE I USED FOR SOME CONTEXT 
while firebreathParticle:IsDescendantOf(workspace) do
	wait()
	local params = RaycastParams.new()
	params.FilterDescendantsInstances = {character}
	params.FilterType = Enum.RaycastFilterType.Blacklist
		
	local hit = workspace:Raycast(character.HumanoidRootPart.Position, character.HumanoidRootPart.CFrame.LookVector * 10)
		
	if hit and hit.Instance.Parent:FindFirstChild("Humanoid") then
		local target = hit.Instance.Parent
			
		target.Humanoid:TakeDamage(0.125)
	end
		
end
4 Likes
#2

Raycasts can only return a single instance, not an array of instances.

I think your best bet is to send another raycast with the appropariate distance left and set the character you hit in a blacklist to get NPCs behind it.

#3

It’s basically the same

local function findAllPartsOnRay(rayOrigin, rayVector)
	local targets = {}

	local raycastParams = RaycastParams.new()
	raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
	raycastParams.FilterDescendantsInstances = targets

	repeat
		local raycastResult = game.Workspace:Raycast(rayOrigin, rayVector, raycastParams)
        if raycastResult then
			table.insert(targets, raycastResult.Instance)
            --You have to set FilterDescendantsInstances again, it's not a reference to the table it's a clone of it.
			raycastParams.FilterDescendantsInstances = targets
        end
    until not raycastResult

    return targets
end
9 Likes
#4

Thank you so much! I’ll dissect that and lean how that solution works.

2 Likes