Table index is nill

[AggrorJorn]

I have copied the firepit code to my own firepit. The code is besides some default value exactly the same. However when you run the code you get the message : Table index is nill. Also the class.lua is opened with the line selected: classtable[modelreference]=class.

 

The object appears to be working normally but I wonder what the error message means.

[Josh]

This indicates the modelreference value equals nil.

[Rick]

You'll have to show your code and then we may be able to see what's happening.

[AggrorJorn]

The firepit code:

require("scripts/class")

local class=CreateClass(...)
class.sound=LoadSound('abstract::campfire_01_15.wav')

function class:CreateObject(model)
local object=self.super:CreateObject(model)

object.model.aabb.x0=-5
object.model.aabb.x1=5
object.model.aabb.y0=-5
object.model.aabb.y1=5
object.model.aabb.z0=-5
object.model.aabb.z1=5

--Create light
object.light=CreatePointLight(4,model)
object.light:SetColorf(1,0.6,0.25,1,1)
object.light:SetPositionf(0,0.8,0,0)
object.light:SetShadowOffset(0,0.91,0)
object.light:SetShadowmapSize(1024)

--Create emitters
if world_transparency~=nil then
	if world_main~=nil then
		SetWorld(world_transparency)

		object.heathaze=CreateEmitter(10,4500,Vec3(0,1,0),0,object.model)
		object.heathaze:SetPositionf(-136,52,-662,0)
		object.material_heathaze=LoadMaterial('abstract::heathaze.mat',0)
		object.heathaze:Paint(object.material_heathaze,0)
		object.heathaze:SetRadius(0.25,0.25)
		object.heathaze:SetWaver(1)
		object.heathaze:SetOrder(1,0)
		object.heathaze:SetVelocity(Vec3(0,0.375,0),Vec3(0,0.05,0))
		object.heathaze:SetRotationSpeed(0.05)
		object.heathaze:SetArea(Vec3(0.2,0.0,0.2))
		object.heathaze:SetPositionf(0,0.50,0,0)

		object.fire=CreateEmitter(25,750,Vec3(0,1,0),0,object.model)
		object.fire:SetPositionf(0,0.25,0,0)
		object.fire:Paint(LoadMaterial('abstract::fire.mat'),0)
		object.fire:SetRadius(0.4,0.1)
		object.fire:SetColorf(0.2,0.2,0.2,1,1)
		object.fire:SetWaver(1)
		object.fire:SetVelocity(Vec3(0,1.5,0),Vec3(0,0.05,0))
		object.fire:SetRotationSpeed(0.01)
		object.fire:SetArea(Vec3(0.2,0.1,0.2))

		object.sparks=CreateEmitter(5,800,Vec3(0,1,0),0,object.model)
		object.sparks:Paint(LoadMaterial('abstract::fire.mat'),0)
		object.sparks:SetRadius(0.01,0.01)
		object.sparks:SetColorf(1,0.6,0.25,1,1)
		object.sparks:SetVelocity(Vec3(0,1.5,0),Vec3(0.05,0.5,0.05))
		object.sparks:SetRotationSpeed(0.1)
		object.sparks:SetArea(Vec3(0.4,0.0,0.4))
		object.sparks:SetWaver(5)
		object.sparks:SetPositionf(0,0.25,0,0)

		SetWorld(world_main)
	end
end

--Emit fire sound
if class.sound~=nil then object.model:EmitSound(class.sound,10,1,1) end

--Declare initial values
object.fluctuation=100.0
object.smoothedfluctuation=5.0

function object:SetKey(key,value)
	if key=="color" then
	elseif key=="intensity" then
	else
		return self.super:SetKey(key,value)
	end
	return 1
end

--Force the bounding box to be bigger
function object:UpdateMatrix()
	object.model.aabb.x0=object.model.mat.tx-5
	object.model.aabb.x1=object.model.mat.tx+5
	object.model.aabb.y0=object.model.mat.ty-5
	object.model.aabb.y1=object.model.mat.ty+5
	object.model.aabb.z0=object.model.mat.tz-5
	object.model.aabb.z1=object.model.mat.tz+5
	object.model.aabb:Update()
end

function object:GetKey(key,value)
	if key=="color" then
	elseif key=="intensity" then
	else
		return self.super:GetKey(key,value)
	end
	return value
end

function object:Render()
	self.fluctuation=self.fluctuation+math.random(-100,100)/1000.0*AppSpeed()
	self.fluctuation=math.min(2.2,self.fluctuation)
	self.fluctuation=math.max(0.2,self.fluctuation)
	self.smoothedfluctuation=Curve(self.fluctuation,self.smoothedfluctuation,5.0/AppSpeed())
	self.light:SetColorf(1.0*self.smoothedfluctuation,0.6*self.smoothedfluctuation,0.25*self.smoothedfluctuation,1,0)
end

end

[Rick]

When do you get this error? Do you get it when you save the script and only 1 time after every save of the script?

[macklebee]

my guess is he is hitting the 'run script' button... which since this isn't a 'game script', he shouldn't be trying to RUN it...

[AggrorJorn]

it doesn't appear when saving. It happens when I press run. I normally press run to update the file so that every instance in the scene gets the new code. I could use the save button and nothing is wrong. I just wonderd what happens with the code when I run the script (F5). It does this every time I run it.

[macklebee]

it doesn't appear when saving. It happens when I press run. I normally press run to update the file so that every instance in the scene gets the new code. I could use the save button and nothing is wrong. I just wonderd what happens with the code when I run the script (F5). It does this every time I run it.

 

that worked for multi-state... it doesn't appear to work for single state... if anything it causes problems.

[Josh]

If you just save the script every instance in the scene will be freed (with the old script) and reloaded (with the new script). You should not run a class script.

[Rick]

Oh he is running just this one script and not running the game mode. Yeah, running one object script by itself isn't how you go about it.