The Most ACCURATE Projectile in ROBLOX!!

yes i clickbait but the vid is REAL
learn abt physics and kinematics
Resources:
FastCast - etithespir.it/FastCastAPIDocs/
Physics by Professor Dave - • Classical Physics
Discord: / discord
My current project: / discord

[@fidgetspinner71]

Part 2 is out now!!! Learn how to make your projectiles bounce!!
th-cam.com/video/xs6G2KhpiP4/w-d-xo.htmlsi=ju6EgeyIsvYbWpXu

[@theprancingprussian]

very useful, im testing ideas on developing a matchlock gun system, a single tool instead of getting over my head with an entire game, helps great since the accurate physics of it performs way further from hitscan than other weaponry

[@yaspat616]

you're talented oml❤

[@SurrealTurnip]

Fantastic video, exactly what I needed and you actually managed to explain it pretty well

[@Rocush]

THE WAY I CLAPPED AND SAID YESSS! 💀 WHEN YOU SAID I'M GONNA TEACH YOU HOW TO WRITE IT YOURSELF. So many dang tutorials are just people showing us how to use the modules and I've always hated those videos because I want to know how to do it not just rely on someone else and never learn. I was about to click off and then you said "the module FastCast" I'm so happy this wasn't one of those.

[@grevict]

Thanks for the tutorial, so helpful :D

[@faded_ace5144]

This is definitely complex but what's more complex are the emotions you feel whilst trying to deal with body velocities and watching something move in the air at a total speed of 5fps. So ty

[@thebestn0oobever]

This is gonna be so good for my fighting game knockback, thanks

[@LianBuatSesuatu]

Thank you very much, I learned a lot from this video.

[@whozproxy]

Thanks for this video! I’m pretty new with Raycasts and I’m trying to make a custom gun system or my game and this will help a lot!

[@williamhutchins479]

Hope it comes out well!

[@NotAltered7750]

Thought I was learning physics. Anyways, nice video

[@Glimmers]

Hey awesome video! When I put in a model as projectile it moves just fine but it looks a little bit choppy because I am just settings its position every RayCast do you think Tween or Lerping would work in anyway for the projectile so it looks smove when it moves?

[@vis7040]

you resumed my physics semester

[@gggamingtakeshi7035]

Here I am, with my non mathematician brain making a goal part created on mouse position with a limited range, then moving it downwards and slowly accelerates downwards faster simulating gravity and having my raycast slowly approach it based on bullet speed when I could've just done this.

[@LeviathanKoda]

this is so incredibly underrated

[@masterssandwich3312]

the memory usage went up to 3 gigabytes lol

[@sarwix8306]

Idk why but this is the coolest video on roblox studio I have ever seen

[@vrfrenzy8451]

thanks, I hate relying on other peoples modules

[@Jelleydev]

only reason i subbed is to fix the 666 nice video btw

[@citizenfoffie7605]

Would there be a way for me to set it to hit a certain amount of studs by adding on angle(but without moving the mouse up), to create a zeroing effect

[@TinShredder]

very cool vid

[@Al3xWarrior]

Very nice!

[@happe3513]

I haven't seen anyone else with this problem in the comments but every time I require the module it says attempt to call a table value.

[@felipemfrudeli]

thx for the video

[@Leafy597]

The issue with having hitboxes client side is that a user can exploit them to hit every time. I prefer having them on the server for that reason, also because everyone gets the same performance that way, one persons hitbox accuracy is the same as anothers.

[@Reviire]

Yeah. The client can tell the server where to start it, but all validation should be on the server only. As long as simulation is consistent between client and server the client predicted simulation should be almost the same as the server, if ping is high there may be issues though.
But it'll still feel good to use as long as it's predicted on the client rather than appearing 0.2-0.4s in the past on your client.

[@Vortex-qb2se]

I was looking for client-side hitbox as it fixes network latency issues but nice tutorial.

[@notactuality]

clientcast?

[@kokobroxd]

you can just use it on client side

[@TREB0RZ]

@@notactuality bad for projectiles

[@bob-rx9yb]

Can i use this to make a cannon like bofors or flak 88 ?

[@Ey_SmoKrac]

not watchin allat it 3:14 in da damn mornin i tired asshit

[@LeapInno]

It seems like roblox projectiles has this weird delay for every shot. It makes it look weird.

[@primharley9586]

Wait. If it’s running on the client doesn’t that make it not secure?

[@Xisco72]

I don't think this is the best for big projectiles, because i'm using this to move a trash MeshPart, and sometimes it goes through parts that shouldn't because they can collide. For example, i'm throwing this meshpart against a house wall, it collides with it and detects the hit, but it trespasses it. Maybe because the mesh is kinda "big" and since you are constantly changing the position, it goes through them unlike when you are using a velocity mover

[@fidgetspinner71]

This video was made before spherecast was added. Use spherecast problem solved

[@Xisco72]

tysm you were right!!! congrats on the video, really useful module to move big projectiles 🥰 @@fidgetspinner71

[@qxxrd]

hey, I'm working on a throwable football and I want the nose of the football to be looking at the direction that the player throws in. I have my own custom caster which handles the football drop and physics.

[@pepperdayjackpac4521]

CFrame.LookAt()

[@qxxrd]

@@pepperdayjackpac4521 Can you please elaborate more?

[@pepperdayjackpac4521]

@@qxxrd CFrame.LookAt will angle your obj so that it faces its targetPosition. It takes in two parameters: the starting position (the position of the obj) and the targetPosition (which is where the obj will be facing towards), both are Vector3.
if your football is changing directions, then you need to recalculate the starting and target position each time so that the nose points like it would in real life.
But if it's just moving in a straight line, then you won't need to recalculate.

[@qxxrd]

@@pepperdayjackpac4521 I have tried to do what you said but the problem now is the when the player throws to the side the nose of the football is fowards and not facing where the player aimed to.
Caster Code:
NewProjectile = self.Projectile:Clone()
DirectionVector = (target - origin).Unit
PositionVector = *Trajectory Calculations*
-- THIS PART IS IN A LOOP
NewProjectile.CFrame = CFrame.lookAt(ProjectilePosition, DirectionVector)

[@fidgetspinner71]

@@qxxrd just multiply it by some rotation cframe that fits with your model (ex. CFrame.Angles(math.rad(90),0,0) )
(i think cframe.angles uses radians instead of degrees but idk just play around with it)

[@haxking2]

great video, idk why but I've always been under the impression that this would've been more complex.
quick question though, does using runservice to execute code every frame on client (even if it's just changing a few values) not a good practice?

[@Antonio-vf2xj]

Well i didnt see the video fully but yea, if ya uses renderstepped, but as its used on clientside i guess, it doesnt affect server at all, so maybe slighty lag but no server lag so like data saving and everything else is safe

[@thetable8175]

as far as I know you need to take into account people having different frame rates causing codes to run too fast or too slow, I've seen many games put for example dashes that update a BodyVelocity's direction every frame for a set amount of times and then destroy it causing higher fps to destroy the BodyVelocity earlier making you travel shorter while capping your fps at around 30 would make it go a lot further

[@thetable8175]

if you wanna do stuff with runservice I'd put checks with like ticks() to make sure your code acts as desired

[@haxking2]

@@thetable8175 wouldn't delta time have the same effect though? or am I misunderstanding it

[@thetable8175]

@@haxking2 yeah delta time is the absolute difference between 2 times

[@Leafy597]

A trick, instead of using Heartbeat and wait() in your script, use task.wait(). The task.wait() command can run at the same speed as heartbeat (60hz, every frame), but you can also input seconds into the parenthesis the same as normal wait().

[@beedrillking4023]

just use render stepped much better

[@hotcrazy15]

wow cool

[@user-nil_cyan]

What is "self"? ( self.Wind.X, self.Wi...)

[@samdoesnotexist79]

hello jit.

[@trilazer_duo8659]

So i have an error that says that projectile is not a member of folder modules, whats the fix?

[@VeryProPlayerYesSir1122]

you need a folder for the projectiles you are shooting at.

[@Sadjhj]

Hey, is it possible to use this on a model? I have a firework game and I want to move the firework physics to client side but every time I tried I couldn’t get it to work.

[@reddeadleisure]

Could you be more specific? Maybe you could even open a devforum post about it

[@cyberlordshop]

Yeah absoloutely. Fire the event, whenever you want the firework to be activated. Just name the start, dest and force. It should work.

[@reddeadleisure]

Bruh i think i replied to the wrong comment

[@cyberlordshop]

really?@@reddeadleisure

[@hadderz4337]

hi wuzrd

[@sadge6430]

ko-

[@Grandmasterannuuu]

Its better to have a black list raycast param instead of whitelist for bigger games

[@pepperdayjackpac4521]

Why

[@WoozyNate]

@@pepperdayjackpac4521 you will have to constantly add many folders and children instead of just blacklisting certain things

[@rei2261]

@@pepperdayjackpac4521 because unless u wanted to whitelist couple of things it would be more efficient

[@notactuality]

you cant allocate for every single thing the projectiles should hit a metaphor would be rather sort out the bad ones instead of look for the good ones @@pepperdayjackpac4521

[@Nightwinger5100]

​@pepperdayjackpac4521 it'll reach a point where there's less things you want it to hit instead of ignore

[@chiaweijie194]

is it possible for me to do this without a tool?

[@fidgetspinner71]

yes, thats why I made it into a module.

[@Gray_mk]

how do i make it so when it touches a part it destroys and doesnt just go through it

[@fidgetspinner71]

End the loop whenever the raycast detects something

[@cupcakewithrabies-eb4rq]

How do I make it so that I can apply these physics to an already existing part?

[@vlogsquad7113]

programming

[@phyopyaelynn-wp6fc]

Unanchor it

[@cupcakewithrabies-eb4rq]

@@vlogsquad7113 i figured out thanks

[@Master_A-A]

Yo so the projectile curves for me without adding wind
Any ideas why?

[@illogicalsavings8268]

That's the gravity

[@Xackory]

Great vid

[@sadge6430]

wcb

[@l8tralalt901]

man but i hate math!

[@namebutworse]

projectile doesnt shoot and i did everything correctly what do i do

[@Kylerisano]

That's a you problem 🤠 🙌

[@namebutworse]

@@Kylerisano :(
(BWOOOMP)
;(

[@illogicalsavings8268]

Ever fix it?

[@sadge6430]

`

[@sadge6430]

8yt

[@spriteman1925]

I hate math 🤠🤠🤠🤠🤠🤠🤠🤠🤠🤠🤠🤠🤠🤠

[@sadge6430]

das

[@Mufazl2120]

Awesome😃

[@CrystalizedGGG]

for some reason this line has an error for me - newProjectile.Params.FilterType = Enum.RaycastFilterType.Whitelist

[@NotTaskAgain]

Change it to "Enum.RaycastFilterType.Include" at the end, I think thats the issue

[@_Sench]

Just incase you still need it. For some reason its underlined but it works in game
my line-
newProjectile.Params.FilterType = Enum.RaycastFilterType.Whitelist

[@VeryProPlayerYesSir1122]

local RunService = game:GetService("RunService")
local Debris = game:GetService("Debris")
local Projectile = {}
function Projectile.new(Gravity, Whitelist, Wind, DespawnTime, Visualize)
local newProjectile = {}
newProjectile.Gravity = Gravity
newProjectile.Wind = Wind
newProjectile.DespawnTime = DespawnTime
newProjectile.Visualize = Visualize
newProjectile.Params = RaycastParams.new()
newProjectile.Params.FilterType = Enum.RaycastFilterType.Whitelist
newProjectile.Params.FilterDescendantsInstances = Whitelist
function newProjectile:Cast(start, dest, force)

local conversion = (game.Workspace.Gravity) / 9.8
local vForce = (dest - start).Unit * force * conversion
local a = Vector3.new(self.Wind.X, self.Wind.Y - self.Gravity * 9.8, self.Wind.Z) * conversion
local t = 0
local currentPos = start
local rayResult = nil
local found = false
local Connection = RunService.Heartbeat:Connect(function(dt)
if not found then
t = t + dt
local projPos = Vector3.new(
start.X + vForce.X * t + 0.5 * a.X * t * t,
start.Y + vForce.Y * t + 0.5 * a.Y * t * t,
start.Z + vForce.Z * t + 0.5 * a.Z * t * t
)
rayResult = workspace:Raycast(currentPos, projPos - currentPos, self.Params)

currentPos = projPos
if self.Visualize then
local Part = Instance.new("Part")
Part.Size = Vector3.new(0.5, 0.5, 0.5)
Part.Position = rayResult.Position
Part.Anchored = true
Part.CanCollide = false
Part.Material = Enum.Material.Neon
Part.Color = Color3.fromRGB(0, 255, 0)
Part.Shape = "Ball"
Part.Parent = game.Workspace
Debris:AddItem(Part, 0.5)
end
if rayResult or t > self.DespawnTime then
found = true
end
end
end)
while not found do
wait()
end
Connection:Disconnect()
if rayResult then
print("Detected")
end
end
return newProjectile
end
return Projectile
Did i do anything wrong because the "rayResult = workspace:Raycast(currentPos, projPos - currentPos, self.Params)" is nil and "Part.Position = rayResult.Position" returns an error.

[@MythIsTheLegend]

Since ray result is nil, your visualization will not follow anything since it does not exist so do Part.Position = projPos

[@rei2261]

@@MythIsTheLegend that doesn't
work

[@MythIsTheLegend]

@@rei2261 It should work because if you do everything correctly and then set part pos to the projectile pos then it always follows the position of the part because if your raycast is nil it don't exist meaning your visual just doesn't go anywhere else.

[@rei2261]

@@MythIsTheLegend ok

[@R3DACTED3310]

why does the projectile spawn higher then the player

[@VeryProPlayerYesSir1122]

local Projectile = require(Modules.Projectile).new(1,workspace:GetChildren(),Vector3.new(0,0,0),3, true)
15:08:41.240 Projectile is not a valid member of Folder "ServerScriptService.Modules" - Server - slingshot_server:9
please help me, the code gives this kind of error

[@chanceplayz-roblox230]

do u have the name in correctly