Is it possible to create an explosion using base parts and not explosion instances? (REUPLOAD)

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#1

Is there a way to create custom explosions (using base parts) that can act like regular explosions that don’t use the explosion instance? And if so, how can I do this?

example below
RocketShoot

the explosion should be capable to :

•Kill players
•Push parts away like a regular explosion would
•Destroy joints, welds etc

#2

Yep just use spatial query :GetPartsIn sphere, detect humanoids using part.Parent and findfthe humanoid, you can then use :ApplyImpulse() and :GetJoints() and destroy them (:BreakJoints is deprecated and only works while model is in workspace btw).

#3

Thanks but how do I get the direction that the impulse should be applied? One of the arguments for :ApplyImpulse is a vector3

#4

No worries,

You can get the direction using target part position - explosionOriginPosition.

A classic formula:

1 Like
#5

Thanks but I couldn’t find the get parts in sphere function on the documentation, are you sure it does exist as a function?

If not then would I do something like
GetPartsInPart(explosion) and then check if the parts are from a certain magnitude to one another?

#6

Whoops, sorry its actually get parts bound in radius.

1 Like
#7

Another thing (sorry for constant replies), how could I calculate the actual power of the force that applies to the parts?

#8

No worries, you can scale it numerically same way as damage. There is sample code on the explosion instance its a linear equation.

local function customExplosion(position, radius, maxDamage)
	local explosion = Instance.new("Explosion")
	explosion.BlastPressure = 0 -- this could be set higher to still apply velocity to parts
	explosion.DestroyJointRadiusPercent = 0 -- joints are safe
	explosion.BlastRadius = radius
	explosion.Position = position

	-- set up a table to track the models hit
	local modelsHit = {}

	-- listen for contact
	explosion.Hit:Connect(function(part, distance)
		local parentModel = part.Parent
		if parentModel then
			-- check to see if this model has already been hit
			if modelsHit[parentModel] then
				return
			end
			-- log this model as hit
			modelsHit[parentModel] = true

			-- look for a humanoid
			local humanoid = parentModel:FindFirstChild("Humanoid")
			if humanoid then
				local distanceFactor = distance / explosion.BlastRadius -- get the distance as a value between 0 and 1
				distanceFactor = 1 - distanceFactor -- flip the amount, so that lower == closer == more damage
				humanoid:TakeDamage(maxDamage * distanceFactor) -- TakeDamage to respect ForceFields
			end
		end
	end)

	explosion.Parent = game.Workspace

	-- Roblox removes explosions after a few seconds, but does not destroy them.
  	-- To ensure our .Hit connection gets disconnected, destroy the explosion once it's removed.
	explosion.AncestryChanged:Connect(function()
		if not explosion.Parent then
			explosion:Destroy()
		end
	end)
end

customExplosion(Vector3.new(0, 10, 0), 12, 50)
2 Likes
#9

Wait is the .Hit event even a real event? I couldn’t find its documentation

#10

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