Better way of raycast for touched?

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#21

Use that function with a part in the face of the car that would be making contact with something (e.g the front of the car if the Z axis suddenly dropped).

Alternatively you could calculate the part in the negative direction of the deceleration (for example, if the difference between the last and current velocity pointed to the back of the car, the part that would most likely be hit would be in the front of the car)

If there’s no results (where the parts are not attached to the car), then assume the car did not crash.

This might seem a little “exotic”, but it could work.

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#22

What I would do is save the last position and check the distance. Then use a Touched function, then you can check that previous distance to see how intense the crash was.

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#23

Would I have to use a loop? How would I use this?

#24

For getting the distance, I used a task.wait(0.05) loop.

#25

Something like this?

local lastVelocity = Vector3.new(0, 0, 0)

RunService.Heartbeat:Connect(function()
	for i,v in ipairs(Parts:GetDescendants()) do
		if v:IsA("BasePart") then
			local currentVelocity = v.AssemblyLinearVelocity
			local velocityChange = (currentVelocity - lastVelocity).Magnitude
			
			v.Touched:Connect(function(hit)
				breakPart(v, hit)
			end)
			
			lastVelocity = currentVelocity
		end
	end
end)
#26

Use a circle ray when the velocity drops. This will collect all parts within the circle.

#27

Very laggy:

local function raycastPart(part)
	local rayOrigin = part.Position
	local rayDirection = ((part.Position).Unit * part.Size.Magnitude) * 2
	local raycastResult = workspace:Spherecast(part.Position, part.Size.Magnitude, rayDirection)

	if raycastResult then
		local hit = raycastResult.Instance
		
		local speed = (part.AssemblyLinearVelocity - hit.AssemblyLinearVelocity).Magnitude

		if speed >= 60 then
			onTouched(part, hit)
		end
	end
end

game:GetService("RunService").Heartbeat:Connect(function()
	for i,v in ipairs(Parts:GetDescendants()) do
		if v:IsA("BasePart") then
			raycastPart(v)
		end
	end
end)
#28

No need to do any ray traces before, just look and see if the velocity has gone down fast, if so, then do the ray. You can also do a touched event on the body of the car rather then check if the velocity has gone down.

#29

How would I check how fast the velocity dropped?

local lastVelocity = {}

for i,v in ipairs(Parts:GetDescendants()) do
	if v:IsA("BasePart") then
		v:GetPropertyChangedSignal("AssemblyLinearVelocity"):Connect(function()
			local currentVelocity = v.AssemblyLinearVelocity
			local velocityChange = (currentVelocity - lastVelocity[v]).Magnitude
			
			lastVelocity[v] = currentVelocity
		end)
		
		v.Touched:Connect(function(hit)
			breakPart(v, hit)
		end)
	end
end
#30

you could either use GetPartInBounds or the good old .Touched event

#31

Yes but I don’t know how to check if the velocity has dropped a lot on touched.