How to make a weapon shoot?

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#1

Hey!

This is kind of a vague and weird question, so I’ll try to make it as simple as possible. I’m working on a water balloon fight game and I’m wondering, how do I make it shoot? I have the animation, remotes and everything. I just need to know how do I make a second balloon that’s the “bullet” and actually make it move towards the player’s mouse? I’m not sure how to make it work with weight, make it fall with real physics.

#2

You can use raycasting. Raycasting is sending an imaginary line toward a certain direction. You can choose the length, and create parameters to check if the ray hit a humanoid, or a part.

Here is the example in the developer hub post,

local function fireLaser()
	-- Set an origin and directional vector
	local rayOrigin = caster.Position
	local rayDirection = Vector3.new(0, -100, 0)
 
	-- Build a "RaycastParams" object and cast the ray
	local raycastParams = RaycastParams.new()
	raycastParams.FilterDescendantsInstances = {caster.Parent}
	raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
	local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)
 
	if raycastResult then
		local hitPart = raycastResult.Instance
		-- Check if the part resides in a folder, that it's fully visible, and not locked
		if hitPart.Parent == workspace.Tiles and hitPart.Transparency == 0 and not hitPart.Locked then
			hitPart.Locked = true
			-- Position beam ending attachment at hit point
			caster.BeamEndAttachment.Position = Vector3.new(0, (hitPart.Position.Y-caster.Position.Y)+raycastResult.Position.Y, 0)
			-- Start beam and burn effect
			caster.Beam.Enabled = true
			caster.BeamEndAttachment.BurnEffect.Enabled = true
			-- After a delay, trigger tile "melt"
			wait(TILE_MELT_DELAY)
			tweenTile(hitPart, 1)
		end
	end
	-- Trigger next caster cycle
	moveCaster()
end

There are alternatives, but this is what I use.