Dynamic VetGroup name?

s0527705277 · July 10, 2013, 10:44am

Can i use “dynamic” names for VetGroup name?

what i’ve tried:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;index = math.random(1,99999999)&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;burn[index]=CBE.VentGroup{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dropSomething[index].fireBall = burn[index]:get("burn") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dropSomething[index].fireBStart = burn[index]:start("burn") &nbsp;

error:

main.lua:780: attempt to index global 'burn' (a nil value) &nbsp;

780 is “}”

the end of: burn[index]=CBE.VentGroup{

s0527705277 · July 10, 2013, 2:03pm

I don’t know if that’s a bug or just the way things work in CBeffects, when i had this bug, the code was in different file and included in main.lua with require(effects). i took the code and past it in main.lua file and it’s working now.

jstrahan · July 10, 2013, 3:17pm

Did you first do
Burn={}

s0527705277 · July 10, 2013, 6:23pm

yes

jstrahan · July 10, 2013, 6:27pm

It may be out of scope? Just guessing without seeing more code

Caleb_P · July 10, 2013, 6:34pm

To begin with, I wouldn’t create a lot of VentGroups themselves. They can be moderately large in storage size, and thus you might just want to create one VentGroup that re-emits each time you want a new “fireball”.

But, using your current multi-VentGroup approach, this might work for you:

[lua]

local burn={}

local function makeABurn()

local index=math.random(9999)

burn[index]=CBE.VentGroup{ … }

dropSomething[index]=burn[index]:get(“burn”)

burn[index]:start(“burn”)

end

[/lua]

As @jstrahan said, I can’t help much more without more code

C

s0527705277 · July 10, 2013, 7:27pm

So I can use one VentGroup and have many “fireballs” moving to different directions and disappearing on different occasions?

Just check with “collectgarbage(“count”)”, every created group took around 100kb of memory.

because right now i’m moving the fireball like this

dropSomething[index].fireBall = burn[index]:get("burn") dropSomething[index].fireBall.y = dropSomething[index].fireBall.y +0.4 &nbsp;

Caleb_P · July 10, 2013, 7:30pm

Yep - a VentGroup emits particles. Each particle has its own attributes and values, and won’t conflict with other particles.

C

s0527705277 · July 10, 2013, 8:32pm

you might just want to create one VentGroup that re-emits each time you want a new “fireball”

like that?

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;burn=CBE.VentGroup{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;preset=burn[index], &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}

Please give an example.

Caleb_P · July 11, 2013, 10:26am

Something to this effect:

[lua]

local burn=CBE.VentGroup{

{ … }

}

local function makeABurn()

burn:emit(“burn”)

end

[/lua]

C

s0527705277 · July 11, 2013, 1:31pm

didn’t workout. if new fireball created, the other older fireball appears on same position as the new one, as if i run without “burn:emit(“burn”)”

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local function makeABurn() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;burn:emit("burn") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dropSomething[index].fireBall = burn:get("burn") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dropSomething[index].fireBStart = burn:start("burn") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dropSomething[index].fireBall.x, dropSomething[index].fireBall.y = brick.x, brick.y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;makeABurn() &nbsp;

Caleb_P · July 12, 2013, 10:27am

Ok, so I think what you’re trying to do is create a fireball at a certain location. Is that correct?

If so, you should do something like this:

[lua]

local burn=CBE.VentGroup{

{

preset=“burn”,

title=“burn”,

emissionNum=15 – So it doesn’t go forever

}

local function makeABurn()

burn:translate(“burn”, fireballX, fireballY) – Wherever you want it

burn:start(“burn”)

end

[/lua]

C

s0527705277 · July 10, 2013, 2:03pm

I don’t know if that’s a bug or just the way things work in CBeffects, when i had this bug, the code was in different file and included in main.lua with require(effects). i took the code and past it in main.lua file and it’s working now.

jstrahan · July 10, 2013, 3:17pm

Did you first do
Burn={}

s0527705277 · July 10, 2013, 6:23pm

yes

jstrahan · July 10, 2013, 6:27pm

It may be out of scope? Just guessing without seeing more code

Caleb_P · July 10, 2013, 6:34pm

To begin with, I wouldn’t create a lot of VentGroups themselves. They can be moderately large in storage size, and thus you might just want to create one VentGroup that re-emits each time you want a new “fireball”.

But, using your current multi-VentGroup approach, this might work for you:

[lua]

local burn={}

local function makeABurn()

local index=math.random(9999)

burn[index]=CBE.VentGroup{ … }

dropSomething[index]=burn[index]:get(“burn”)

burn[index]:start(“burn”)

end

[/lua]

As @jstrahan said, I can’t help much more without more code

C

s0527705277 · July 10, 2013, 7:27pm

So I can use one VentGroup and have many “fireballs” moving to different directions and disappearing on different occasions?

Just check with “collectgarbage(“count”)”, every created group took around 100kb of memory.

because right now i’m moving the fireball like this

dropSomething[index].fireBall = burn[index]:get("burn") dropSomething[index].fireBall.y = dropSomething[index].fireBall.y +0.4 &nbsp;

Caleb_P · July 10, 2013, 7:30pm

Yep - a VentGroup emits particles. Each particle has its own attributes and values, and won’t conflict with other particles.

C

s0527705277 · July 10, 2013, 8:32pm

you might just want to create one VentGroup that re-emits each time you want a new “fireball”

like that?

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;burn=CBE.VentGroup{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;preset=burn[index], &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;... &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}

Please give an example.