Lua interaction? Not really

[Josh]

Try this for the firepit script and it will work:

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(0,1.2,0,0)
object.light:SetShadowOffset(0,0.91,0)

--Create emitters
if fw~=nil then
	SetWorld(fw.transparency.world)

	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(0)
	object.heathaze:SetOrder(1,0)
	object.heathaze:SetVelocity(Vec3(0,0.375,0),Vec3(0,0.05,0))
	object.heathaze:SetRotationSpeed(0.01)
	object.heathaze:SetArea(Vec3(0.2,0.0,0.2))
	object.heathaze:SetPositionf(0,0.25,0,0)

	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(fw.main.world)
end

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

--Declare initial values
object.fluctuation=1.0
object.smoothedfluctuation=1.0

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

function object:Render()
	self.fluctuation=self.fluctuation+math.random(-100,100)/1000.0*AppSpeed()
	self.fluctuation=math.min(1.8,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

[macklebee]

why does your SetKey and GetKey functions have three parameters?

return self.super:SetKey(model,key,value)

 

return self.super:GetKey(model,key,value)

 

shouldn't it only be two parameters, key and value?

[Josh]

Yes. Common mistake.

[macklebee]

also now, the heat haze from the firepit doesn't appear to be rendering correctly in bmax. Looks fine in the editor but wrong in the program...

 

edit--- the forum won't allow me to attach a 15kb pic...

 

[gordonramp]

Just updated... No heathaze in the Editor or Lua, sky is default though I changed it in the Editor.

[Josh]

Can you post a demo? I did a test in C++ and it worked fine. Shouldn't be any difference.

[macklebee]

yep, i will post something in one second...

[Marleys Ghost]

I still get the problem with water and the heat haze in the editor and in Bmax.Not had the same effect as Mack though.

 

[Wchris]

For me firepit particle works now ! thanks

 

i also get marléy's heat haze issue with water, but it's wysiwyg and exactlty the same in the editor and outside.

[gordonramp]

Editor and Lua Engine images..

[macklebee]

yeah the heathaze issue with water is a known issue... its in the bug tracker... basically don't mix emitters with water...

 

my problem was i was getting that with no water in my scene... i am trying to do a clean install in hopes that it magically fixes the issue

[TylerH]

I had/still have this issue with the heathaze.

 

 

I also would like to note that any of the particle shaders that use refraction will not be visible if there are other particles being rendered behind them.

 

It seems that particles don't play nicely with each other.

[Josh]

That's normal. Unless you want a separate buffer/pass for every single z-sorted object, it's not possible to have refraction on top of refraction. All particles are rendered in the same pass, even if they aren't using a refraction effect.

[TylerH]

Well, I am not rendering refraction on top of refraction.

 

I am rendering refracting particles on top of normal fog / smoke particles.

 

Refraction on Normal Particles should work...

[Josh]

Not if they are rendered in the same pass.

[TylerH]

Why exactly?

[Josh]

Because the refraction shader reads a texture to refract what has already been rendered. Rasterizers can't read an underlying pixel, unfortunately.

[TylerH]

Ah, that makes sense then.

 

The first thing that came to mind when this reared its head was more than one transparency world, but probably not.

[Josh]

Well, it won't stop there. Then we will need one for water, one for emitters, one for refractive materials...and then someone will notice two refractive layers don't work.

[TylerH]

How do most games get around this then?

 

It isn't impossible, because you can see it has been done in games:

- Windows

- Water

- Rain

- Emitters

- Other Glass

 

We will stumble upon a way to do it eventually, and it isn't anything super important. I am happy with the fact we have robust particles at all.

[Josh]

You CAN have layers of transparent surfaces, just not when they use a refraction effect that reads from a texture and distorts the image.