Sorry if this has been asked before! I read few threads regarding this topic but seems that they aren’t similar to my case.
Currently I’m working on a weapon, and I’m trying to ignore invisible, CanCollide and player’s accessories parts and let the ray cast go through it.
local IgnoreParts = {}
workspace.DescendantAdded:Connect(function(v)
if v:IsA("BasePart") then
if v.CanCollide == false then
table.insert(IgnoreParts, v)
end
if v.Transparency == 1 then
table.insert(IgnoreParts,v)
end
if v.Name == "Handle" then
table.insert(IgnoreParts, v)
end
end
end)
And I use FindPartOnRayWithIgnoreList to cast the ray, and using CollectionService to grant these part a Tag named Ignore1
for i = 1,#IgnoreParts do
cs:AddTag(IgnoreParts[i],"Ignore1")
end
local ignored = cs:GetTagged("Ignore1")
local hit,pos,norm = workspace:FindPartOnRayWithIgnoreList(ray,ignored)
I tested it out and it returns to a weird behavior, whenever my mouse is pointing at the Can Collide part, the ray will go straight up:
This also make player’s impossible to hit when mouse is pointing at their accessories, the ray will just go straight up:
Is there any possible way to make the ray ignore the part and go straight through it?
Very simple, remember to use Mouse.TargetFilter to avoid weird going astray when aiming at invisible or non-cancollide parts. Unfortunately, you’ll have to put all the parts under a folder and set the Mouse.TagetFilter on the folder.
Maybe use ChildAdded on Workspace and update the ignore list would fix the issue.
workspace.ChildAdded:Connect(function(child)
if game:GetService("Players"):GetPlayerFromCharacter(child) then
for _, child in next, child:GetChildren() do
if child:IsA("Accessory") then
table.insert(IgnoreParts, child)
end
end
end
end)
Also using the folder in workspace, you can just throw the folder into IgnoreParts, because the Workspace:FindPartOnRayWithIgnoreList ignores all descendants for each instance.
From a general efficiency point of view, CollectionService seems to be a cleaner way of handling this problem. Parenting ignored parts to a folder and then iterating through the folder to generate a table seems redundant when you have the option of just doing:
local Ignored = CS:GetTagged("Ignored")
@Headstackk as @Operatik mentioned, with your raycasting method all descendants of the instance(s) passed in the Ignored table are ignored. This issue may lay in improper tagging of instances, or not tagging your own Character to be ignored too.
The problem might be as well that you forgot to ignore the instances already present before the DescendantAdded was created.
local IgnoreParts = {}
local ignorefunc = function(v)
if v:IsA("BasePart") then
if v.CanCollide == false then
table.insert(IgnoreParts, v)
end
if v.Transparency == 1 then
table.insert(IgnoreParts,v)
end
if v.Name == "Handle" then
table.insert(IgnoreParts, v)
end
end
end
workspace.DescendantAdded:Connect(ignorefunc)
for i,v in pairs(workspace:GetDescendants()) do ignorefunc(v) end
And as H_mzah said, the character should also be added.
You mean I have to create a "Physical’ Folder in Workspace and put all the ignoring parts in it? I think Mouse.TargeFilter should solve my problem, but how do I ignore all the parts with it?
for i = 1, #IgnoreParts do
cs:AddTag(IgnoreParts[i],"Ignore1")
mouse.TargetFilter = IgnoreParts[i]
end
The behavior remains the same.
Edit: I made a can collide part and made the MouseTarget to it, something like this: mouse.TargetFilter = workspace.cancolide
It works as what I expected, but again how do I utilize it and use it in multiple parts? Using a table like I did above?
Is it necessary? Any other possible ways like using table? I feel like it won’t be efficient if I keep parenting and unparenting instances to folder frequently.
You can’t set TargetFilter to a table. TargetFilter takes a value type of Instance, as you can see here, so it can only be set to an object that you can create with Instance.new().
How do I make Mouse.TargetFilter to ignore multiple parts but not using Folders/Models? I can not parent a player’s accessories to a certain Folder or Model.
Edit: I think the problem is on FindPartOnRayWithIgnoreList. I used Roblox Developer Hub’s How to make a laser gun tutorial, and put the replacing their workspace:FindPartOnRay with FindPartOnRayWithIgnoreList. I put a table that included a part and player’s character as arguments, aka parts to ignore, here’s the outcome behavior:
In the start of the gif, my mouse pointed the place where I expect the ray to be casted at. But when I try clicking that position through the transparent part, the ray casted way up, which is what happening in my game.
FYI, this only happens when the starting point is close to the ignoring part, but not colliding or touching it.
Speaking of Mouse.TargetFilter, it lacks the feature of using a table(or list) of objects rather than using one instance and read all its descendants. That’s why the only temporary band-aid I can think of is using folders and setting Mouse.TargetFilter to it.
A feature request was made as far back since 2015 regarding about using a list for TargetFilter.
Instead of relying on Mouse.TargetFilter and using Mouse.Hit to get the mouse’s position, I instead do another raycast from the camera in the direction of the mouse, with the same ignore list as the raycast I was originally trying to perform.
Here’s the module I wrote and that I use for it. Usage instructions are commented at the top of the module, aside from one I forgot to add: use .HitPosition to get the filtered Mouse.Hit. MouseFilter.rbxm (1.6 KB)
I was reminded that this method was used and shown in one of the older DevForum posts. If I reckon correctly, it casts the ray from the camera using the same ignore list as the original intended raycast. Next, another ray is cast from the gun’s barrel through the hit position of the projected ray.
I have lost track of which post it was. They were probably discussing about an invisible barrier in the game and the rays were astray and unintended while trying to fire through it.
You can make a folder where you can place anything that bullets will ignore
local IgnoreTo = game.Workspace.Bullets_Ignore:GetChildren();
table.insert(ignore, plr.Character)
Edit:
If you wanna make bullets ignore hats just write this:
for _,players in pairs(game.Players:GetPlayers()) do
for i, hats in pairs(players.Character:GetChildren()) do
if hats:IsA("Accessory") then
hats.Handle.Size = Vector3.new(0,0,0)
end
end
end
You can not resize a part to 0,0,0. It will change to 0.05,0.05,0.05 if you attempt to make it 0,0,0
Plus, this also happen no matter what the size of a part is, if you walk closely enough but not colliding your ShootingPart, this also happens, shown in here:
