How to reflect a raycast with some sort of curves

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#1

Basically, I’m trying to see where a ball is going to land, using raycasting.

But, once it hits anything, I want It to reflect.

Now here’s the point: The raycast somehow has to move down with the gravity like a ball would do in the future.

this is poorly explained

#2

after some research and re writing this reply 2 times here is what I found. → Roblox: Reflecting Rays. Want bullets to ricochet? Lasers to… | by Stephen | Medium

#3

Basically not the correct answer i was looking for

#4

Thats what you mentioned above doe.

#5

If your want the ball to reflect you should use the formula mentioned in the post @Qinrir shared. I’ve used it before and it works like a charm. As for calculating the direction of the ball while under the force of gravity, that one is a bit trickier. However, I’ve done it before when needing to get an estimate for my players position, so I should be able to help.

Here’s part of the code I used for getting the future position:

local RunService: RunService = game:GetService("RunService")

local rootPart: BasePart = character.PrimaryPart or character:WaitForChild("HumanoidRootPart")

local x0: Vector3 = rootPart.Position -- initial position
local v0: Vector3 = rootPart.AssemblyLinearVelocity -- initial velocity

RunService.Heartbeat:Connect(function()
	local linearVelocity: Vector3 = rootPart.AssemblyLinearVelocity
	local characterVelocity: Vector3 = character:GetPivot():VectorToObjectSpace(linearVelocity)
	
	local v1: Vector3 = (0.5*(-Vector3.yAxis * workspace.Gravity)*(deltaTime^2) + v0*deltaTime)
	local v2: Vector3 = (v1 * horizontalVector) -- the horizontal velocity
	
	local x1: CFrame = character:GetPivot() + (v2 * 0.5) -- the position
	
	x0 = rootPart.Position
	v0 = linearVelocity
	
	fallHeight = if (characterVelocity.Y < 0) and (math.abs(characterVelocity.Y) > 0.00001) then math.max(math.abs(v1.Y) * 2, fallHeight) else 0
	
	local querySize: Vector3 = floorSize + (Vector3.yAxis * fallHeight)
	local queryFrame: CFrame = x1:ToWorldSpace(floorFrame - (Vector3.yAxis * querySize.Y * 0.5))
end)

You should be able to adapt it to your needs. There are a few variables in there that you don’t need, like floorSize and floorFrame. You can just ignore these, as I left them to help understand the code better.

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