I Need Help With A 3D2D Button

[|Shepherd|]

I need to make a 3d2d button as the title says. I googled a little while and found that:

local isec = IntersectRayWithPlane( EyePos( ply ), Forward( EyeAngles( ply ) ), pos, trace.HitNormal )

if isec then

	local ap = pos - isec
	local ab = pos - tr
	local ad = pos - bl

	local ap_ab = Dot( ap, ab )
	local ab_ab = Dot( ab, ab )
	local ap_ad = Dot( ap, ad )
	local ad_ad = Dot( ad, ad )

	if 0 < ap_ab and ap_ab < ab_ab and 0 < ap_ad and ap_ad < ad_ad 
	and IsLineOfSightClear( ply, isec ) then --and if they have line of sight of the panel

	--Do whatever you'd like, they're looking directly at the panel

	end

end

So far, so good.

But it just causes lua erros if I try to use it.
For now it isn't a button...yet. It just changes it's color. I want that to work before a proceed with making it only work if I press "e" on it.

That's what I tried:

local ply = LocalPlayer()
[...]
surface.SetDrawColor( 255, 0, 0, 255 )


local pos = Vector(30,230)
local isec = util.IntersectRayWithPlane( EyePos( ply ), Forward( EyeAngles( ply ) ), pos, trace.HitNormal )

if isec then

	local ap = pos - isec
	local ab = pos - tr
	local ad = pos - bl

	local ap_ab = Dot( ap, ab )
	local ab_ab = Dot( ab, ab )
	local ap_ad = Dot( ap, ad )
	local ad_ad = Dot( ad, ad )

	if 0 < ap_ab and ap_ab < ab_ab and 0 < ap_ad and ap_ad < ad_ad 
	and IsLineOfSightClear( ply, isec ) then --and if they have line of sight of the panel

	surface.SetDrawColor( 0, 255, 0, 255 ) --Do whatever you'd like, they're looking directly at the panel

	end

surface.DrawRect( 30, 230, 270, 70 ) 
end

[ERROR] addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82: attempt to call global 'Forward' (a nil value)
  1. unknown - addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82

I don't understand while Forward is a nil value.
Tell me if you need to see more code to help me because the rest is pretty messy :smile: .

[Seris]

Use IntersectRayWithPlane(), run the returned vector through WorldToLocal, reverse your Y axis in the vector and check if the X and Y positions are within the bounds of the button

Also Forward isn't a default function, use EyeAngles():forward()

[|Shepherd|]

[QUOTE=AJ10017;50370662]Use IntersectRayWithPlane(), run the returned vector through WorldToLocal, reverse your Y axis in the vector and check if the X and Y positions are within the bounds of the button

Also Forward isn't a default function, use EyeAngles():forward()[/QUOTE]

I changed util.IntersectRayWithPlane to IntersectRayWithPlane() and now there is that error:

[ERROR] addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82: attempt to index global 'trace' (a nil value)
  1. unknown - addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82

I think I have to define trace but I don't exactly know how I should define it.

[Seris]

[QUOTE=|Shepherd|;50370826]I changed util.IntersectRayWithPlane to IntersectRayWithPlane() and now there is that error:

[ERROR] addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82: attempt to index global 'trace' (a nil value)
  1. unknown - addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:82

I think I have to define trace but I don't exactly know how I should define it.[/QUOTE]

It was fine how it was

[|Shepherd|]

[QUOTE=AJ10017;50371594]It was fine how it was[/QUOTE]

I changed it back but the error persists
What should I do?

[ERROR] addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:108: attempt to index global 'trace' (a nil value)
  1. unknown - addons/loyality points and news screen/lua/entities/lp_screen/cl_init.lua:108

[Seris]

instead of trace.HitNormal use the angle of the 3D2D instance and get its up vector using <angle>:Up()

[|Shepherd|]

[QUOTE=AJ10017;50377096]instead of trace.HitNormal use the angle of the 3D2D instance and get its up vector using <angle>:Up()[/QUOTE]

Could you tell me if I made any mistakes? At the moment there are no errors, it just does nothing.

function ENT:Draw()


	local ply = LocalPlayer()
	local player = LocalPlayer()
	local dist = (ply:GetShootPos() - self.Entity:GetPos()):Length()
	if (dist > 750) then return end

	EntPos = self:GetPos()

	self:DrawModel()


	local ang1 = self:GetAngles()

	ang1:RotateAroundAxis(self:GetAngles():Forward(), 90)
	ang1:RotateAroundAxis(self:GetAngles():Up(), 90)


cam.Start3D2D(EntPos+(self:GetForward()*13)+(self:GetRight()*7.1)+(self:GetUp()*20), ang1, 0.05)



TestColor=Color(0,0,0,255)

surface.SetDrawColor( TestColor )
surface.DrawRect( 0, 0, 340, 360 )





surface.SetDrawColor( 255, 0, 0, 255 )



local pos = Vector(30, 230)
local isec = util.IntersectRayWithPlane( EyePos( ply ), EyeAngles( ply ):Forward() , pos, ang1:Up() )

	--print(ang1)

	if isec then

		local ap = pos - isec
		local ab = pos - tr
		local ad = pos - bl

		local ap_ab = Dot( ap, ab )
		local ab_ab = Dot( ab, ab )
		local ap_ad = Dot( ap, ad )
		local ad_ad = Dot( ad, ad )

		if 0 < ap_ab and ap_ab < ab_ab and 0 < ap_ad and ap_ad < ad_ad 
	and IsLineOfSightClear( ply, isec ) then --and if they have line of sight of the panel

	surface.SetDrawColor( 0, 255, 0, 255 )--Do whatever you'd like, they're looking directly at the panel

	print(isec)

end

end


surface.DrawRect( 30, 230, 270, 70 ) 

-- [...]