Getting a model drawn on the hud to point at a 3d coordinate

Garry's Mod coding
#1

Trying to get a arrow model that is drawn on the HUD to point at the location of a ent within the world. I can’t seem to get it to point in the right direction, I’m doing a pretty awful job at trying to figure out this issue honestly.

My code:


function GM:SetupArrowGuide()
	if IsValid(self.ShopDirPointer) then
		self.ShopDirPointer:Remove()
	end
	
	self.ShopDirPointer = vgui.Create("DModelPanel")
	self.ShopDirPointer:SetSize(256, 256)
	self.ShopDirPointer:SetPos(ScrW() * 0.01, 0)
	self.ShopDirPointer:SetModel("models/trader/arrow.mdl")

	local mn, mx = self.ShopDirPointer.Entity:GetRenderBounds()
	local size = 0
	size = math.max(size, math.abs(mn.x) + math.abs(mx.x))
	size = math.max(size, math.abs(mn.y) + math.abs(mx.y))
	size = math.max(size, math.abs(mn.z) + math.abs(mx.z))

	self.ShopDirPointer:SetFOV(40)
	self.ShopDirPointer:SetCamPos(Vector(size, size, size))
	self.ShopDirPointer:SetLookAt((mn + mx) * 0.5)
	
	function self.ShopDirPointer:LayoutEntity(ent) 
		local ShopDirPointerRotation
		local ShopLoc = GAMEMODE.CurrentTraderPos
		if not ShopLoc then return end

		local PlayerPos = LocalPlayer():GetPos()
		if ShopLoc.Z > PlayerPos.Z + 50 or ShopLoc.Z < PlayerPos.Z - 50 then
		    ShopDirPointerRotation = LocalPlayer():WorldToLocal(PlayerPos - ShopLoc):Angle()
		else
			local FixedZPos = ShopLoc
		   FixedZPos.Z = PlayerPos.Z
		   ShopDirPointerRotation = LocalPlayer():WorldToLocal(PlayerPos - FixedZPos):Angle()
		end
		
		ShopDirPointerRotation.p = 0
		ent:SetAngles(ShopDirPointerRotation)
	end
end