How to make block break from behind?

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#1

hello,im making a rpg game. i want the block to break if you get attacked from behind. just like on gpo and tsbg. in my combat system when you block, a tag named “blocking” gets added to your character. and in my hitbox system, if hitbox hits an enemy that haves blocking tag, the hitbox loop breaks. can you help me?

1 Like
#2

You can check if the person that is attacking the player is infront of the player using the CFrames of the two humanoidrootparts.

#3

can you explain it a bit more please?

#4

do ya know strongest battlegrounds? If you hit from behind, you won’t block it
so you get damaged, but in this case, he want to break the block instead of hit the player

#5

Sure.
You want to check if the attacker is behind the person that is blocking.
This is the code snippet I linked:

local isInfront = false
local isNextTo = false
if Core then
    local angle = math.acos(Core.CFrame.LookVector:Dot((Child.Position-Core.Position).Unit))
    isInfront = angle < math.pi/2
    isNextTo = angle < math.pi/1.65
end

In this code snippet, Core is the main part, and Child is the part you’re comparing it to.
The angle variable gets the angle from the Core part’s orientation to the Child part using the Dot product of the look vector of the Core part (so its orientation) and the relative position of the Child part to the Core part.
By calculating that Dot product, we get the cosine of the angle. To get the actual angle, you need to use the inverse cosine function on it (math.acos()).
Now, you have the angle between the two parts and can determine whether or not the Child part is behind the Core part by comparing the angle to an already specified threshold.

local isInfront = false
local isNextTo = false
if Core then
    local angle = math.acos(Core.CFrame.LookVector:Dot((Child.Position-Core.Position).Unit))
    isInfront = angle < math.pi/2
    isNextTo = angle < math.pi/1.65
end

if not isInfront and not isNextTo then -- equivalent to isBehind
    break
end

edit: Actually, I think this would only work for one side, so you’d have to use the absolute value of the angle.

    isInfront = math.abs(angle) < math.pi/2
    isNextTo = math.abs(angle) < math.pi/1.65
#6

no no i want it to hit the player too. if i can achieve how to detect if someone is hitting behind, i can just stop block animation and remove the blocking tag.

#7

ok now i understand, thank you for letting me know

#8

the punch
[“R”] = function(plr)
local chr = plr.Character

	if chr:HasTag("Stun") or chr:HasTag("Using") or chr:HasTag("HeavyCD") then
		return
	end
	task.spawn(function()
		task.wait(.34)
		local st = os.time()
		local hitplrs = {}
		playRandomHitSound(game.ReplicatedStorage.Movesets.BoogieWoogie.Sounds.Swings,chr)
		while os.time() - st < .05 do
			local hitcast = hb.CreateBB(chr, Vector3.new(5, 5, 7), chr.HumanoidRootPart.CFrame * CFrame.new(0, 0, -4))
			for i, v in pairs(hitcast) do
				if not table.find(hitplrs, v.Name) then
					table.insert(hitplrs, v.Name)
					v.Humanoid:TakeDamage(15)
					stunplr(v,1.2)
					playRandomHitSound(game.ReplicatedStorage.Movesets.BoogieWoogie.Sounds.HeavyHits,v)
					knockback(chr, v, .2, 60)
					knockback(chr, chr, .1, 20)
					playRandomHitAnimation(v.Humanoid)
				end
			end
			task.wait()
		end
	end)
	task.spawn(function()
		chr:AddTag("Using")
		chr.Humanoid:LoadAnimation(game.ReplicatedStorage.Movesets.BoogieWoogie.Anims.Heavy):Play()
		task.wait(.25)
		chr:RemoveTag("Using")
	end)
	task.spawn(function()
		chr:AddTag("HeavyCD")
		task.wait(5)
		chr:RemoveTag("HeavyCD")
	end)
end,

the hitbox module:
function module.Create(Attacker, Size, cFrame)
local Params = OverlapParams.new()
Params.FilterType = Enum.RaycastFilterType.Blacklist
Params.FilterDescendantsInstances = {Attacker}

--HitboxIndicator(Size, cFrame)
local Parts = workspace:GetPartBoundsInBox(cFrame, Size, Params)
local Victims = {}

for _, Parts in pairs(Parts) do
	local Victim = Parts.Parent
	if Victim:FindFirstChildWhichIsA("Humanoid") and Victim:FindFirstChild("HumanoidRootPart") then
		if not Victims[Victim.Name] then
			if Victim:HasTag("Dodge") then
--				movesets[Victim.AbilityValue.Value](Victim,Attacker)
				break
			elseif Victim:HasTag("IF") then
				break
			elseif Victim:HasTag("Blocking") then
				break
			else
				Victims[Victim.Name] = Victim
				print(Victim.Name.." damaged")
			end
		end
	end
end
return Victims

end

where should i add that? sorry im a bit new to combat scripting.

#9

I believe it would be:

			elseif Victim:HasTag("Blocking") then
				local HRP_V = Victim:FindFirstChild("HumanoidRootPart")
				local HRP_A = Attacker:FindFirstChild("HumanoidRootPart") -- assuming Attacker is the character
				
				local isInfront = false
				local isNextTo = false
				if HRP_V then
 					local angle = math.acos(HRP_V.CFrame.LookVector:Dot((HRP_A.Position-HRP_V.Position).Unit))
					isInfront = angle < math.pi/2
					isNextTo = angle < math.pi/1.65
				end

				if isInfront or isNextTo then
					break
				else -- is behind
					-- break blocking loop, maybe just by removing blocking tag, idrk how it works in your system
				end
			else
3 Likes
#10

thank you so much!! it workedd

1 Like
#11

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