Getting the position of a part with velocity in the next second

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#1

hey devforumers!! today i wanted to make a silly particle effect that kiind of looks like it points to the direction you’re going to (the particle is gonna be played after a player is flinged). i’d rather not use lookvector because then it would point in a completely different direction if you use shiftlock or something. anyway, here’s what ive tried.
(for context, objecttoparticle here is a character’s torso.)

for i = 0, 10, 1 do
	task.spawn(function()
		local newparticol = Instance.new("Part")
		newparticol.Size = size
		newparticol.CanCollide = false
		newparticol.CanQuery = false
		newparticol.CanTouch = false
		newparticol.Massless = true
		newparticol.Anchored = true
		newparticol.Color = color
		newparticol.Name = "particle"
		newparticol.Transparency = .8
		newparticol.TopSurface = Enum.SurfaceType.Smooth
		newparticol.BottomSurface = Enum.SurfaceType.Smooth
		newparticol.Shape = Enum.PartType.Ball
		newparticol.CFrame = objecttoparticle.CFrame
		newparticol.Parent = workspace
		local doingit = true
		task.spawn(function()
			task.wait(4.2)
			doingit = false
		end)
		while doingit do
                        -- this next line is the one im struggling with. ive been trying to do it in... quite a lot of different ways. please help me with this. the most important thing here is the lookat(), just ignore all the different stuff
			local cframe1 = CFrame.lookAt(objecttoparticle.Position, objecttoparticle.Position + (((objecttoparticle.Position + objecttoparticle.AssemblyLinearVelocity).Unit) - objecttoparticle.Position)) * CFrame.Angles(0, math.rad(i * 36), 0) * CFrame.new(0, 2.5, 5)
			local propersnow = {["CFrame"] = cframe1}
			tweenserv:Create(newparticol, TweenInfo.new(.05, Enum.EasingStyle.Cubic), propersnow):Play()
			task.wait(.05)
		end
	end)
	task.wait(.02)
end

-- also for that one cframe.lookat() line i tried quite a bit of different stuff, like (objecttoparticle.Position + objecttoparticle.Velocity) buut it still didnt work

yeah devforumers i tried checking other posts but i didnt find anything there besides some weird usage of .magnitude which i still dont understand to be honest. also if you didnt really understand what i meant by “making the particle look like it points to the direction the player is going” i just want it to be like theres a ring that looks perpendicular to the direction of the torso (i know i didnt clear up ANY confusion but i hope you get the general idea)

writing this was really hard and im so sorry for the mess you had to read… if you want, i could illustrate the way i want it to look

#2

Weld the particle to the torso, and use CFrame.Angles., Also use task.delay instead of task.spawn and task.wait().

#3

uhh how exactly would i use cframe.angles if the position is… well… a vector? also i dont think welding it would help because it just makes it’s position relative to the torso’s, while i want it to be reflecting the move direction, but still thanks for the advice of task.delay, i completely forgot that exists

#4

so you want the particle to be on the direction the player is going to and not the direction of where he’s looking at?

#5

yeah exactly!!

awesomethirtycharacterslimit

#6

hmm. currently im trying out (objecttoparticle.Position + objecttoparticle.Velocity) and it gives me good results so for now ill try using this and then maybe it will all work out

#7

aand i got it to work!! all ive had to do was to add a little math.rad(90) to the x and z rotations on cframe.angles so now it looks like this
local cframe1 = CFrame.lookAt(objecttoparticle.Position, (objecttoparticle.Position + objecttoparticle.Velocity)) * CFrame.Angles(math.rad(90), math.rad(i * 36), math.rad(90)) * CFrame.new(0, 0, 5)
anyway sorry for posting i solved my own problem

1 Like
#8

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