LUA variable problem

[wh1sp3r]

Why ? when i do aritmetic thing with yy .. it shows different error, that i am doing arithetic on variable yy (usedata)

 

i tried to make number from it, same problem.

what's wrong ?

[Josh]

This would indicate that the values being passed to the function are nil (undefined).

[wh1sp3r]

               local posL = Vec3(0,0,0)
               local pos = Vec3(0,0,0)

		for i=0, 3362 do

	posL = surface:GetVertexPosition( i )
	pos = TFormPoint( posL, object.model, nil)

               local h = class.GetTerrainHeight(pos.x, pos.z, self.model.world)

 

hm, but It's defined ... IT's Vec3

[Josh]

That looks like it should work then. Please post an example I can reproduce.

[wh1sp3r]

ok, here

decalplane.zip

[wh1sp3r]

any news ?

[macklebee]

he is probably sleeping

[Marleys Ghost]

Sleeping? how dare he!! lol ... the wonderful world of timezones

[AndyGFX]

Your problem is very simple:

 

Method in LUA is seperated by :

 

change this line

 

local h = class.GetTerrainHeight(pos.x, pos.z, self.model.world)

 

to:

 

local h = class:GetTerrainHeight(pos.x, pos.z, self.model.world)

[wh1sp3r]

lol ? thank you Andy, i will try it

[macklebee]

same problem with this line:

local terrain = class.GetTerrain(world)

[AndyGFX]

This little sample shows how-to and when is possible call function/method with . and when with :

 

-- | ---------------------------------------------------------------------------
-- | Define class name
-- | ---------------------------------------------------------------------------

TMyClass = {}


-- | ---------------------------------------------------------------------------
-- | Define class properties
-- | ---------------------------------------------------------------------------

TMyClassProp =
{
	var1 = 10,
	var2 = null,
	my_fnc = function (a) print(a) end
}

-- | ---------------------------------------------------------------------------
-- | CONSTRUCTOR
-- | ---------------------------------------------------------------------------

function TMyClass:New()

   o = TMyClassProp
setmetatable(o, self)
   self.__index = self

   return o

end

-- | ---------------------------------------------------------------------------
-- | Method #1
-- | ---------------------------------------------------------------------------

function TMyClass:SetVar1(v1)

self.var1 = v1

end

-- | ---------------------------------------------------------------------------
-- | Method #2
-- | ---------------------------------------------------------------------------

TMyClass.SetVar3 = function (v1) TMyClass.var1 = v1
					print(TMyClass.var1)
					end



-- | ---------------------------------------------------------------------------
-- | Method #3
-- | ---------------------------------------------------------------------------

function TMyClass:GetVar1(v1)

return self.var1
end


-- *****************************************************************************
-- USING
-- *****************************************************************************

-- create instance of TMyClass

myClass  = TMyClass:New()

-- call class method

myClass:SetVar1(100)

-- direct acces

myClass.var2 = 101

-- test result

print (myClass:GetVar1())
print (myClass.var2)
print (myClass.SetVar3(222))

myClass.my_fnc(123)

 

 

Note: Every functions in LUA are values. More here: Lua Functions