Playing particle emitter issue (project example included)

[Rick]

https://dl.dropboxusercontent.com/u/1293842/AnimationTutorial.rar

 

Run this in release mode and you'll see it gives an error. In debug mode it runs, but the explosion emitter doesn't work.

 

I have the main character shooting (raycasting) and it plays a cartoon laser type sound. It does the raycasting out. When it hits the bomb I hide the model (because we can't Release() them yet without crashing the game), I play an explosion sound, and the last thing I need to do is to play the explosion emitter I have).

 

I made the bomb character a prefab, which has an emitter prefab assign to it. I then have a spawner script spawning bomb prefabs. If in debug mode the game runs, but still no emitter showing. If in release mode it crashes when it creates a bomb prefab instance with the error: Object reference count error. If I comment out the loading of the explosion emitter prefab, then I don't get this error in release mode.

[YouGroove]

To resume, you can't play it one time only ?

[Rick]

I tried saving an emitter off as a prefab and I have the following script that loads the prefab and calls Play() on it in the collision. However I get an error saying Play is a nil value. Any ideas as to why that would be? The explosionEmitter is a valid entity, but Play() doesn't seem to be exposed for some reason.

 

 

import "Scripts/AnimationManager.lua"

Script.ExplosionEmitterPrefab = "" --path

Script.Target = nil --entity
Script.Speed = 5 --int
Script.Accel = 15 --int

Script.AnimSeq = {}
Script.AnimSeq.Idle = 1
Script.AnimSeq.Walk = 0

function Script:Start()
   self.entity:SetKeyValue("type", "bomb")

   self.animMgr = AnimationManager:Create(self.entity)

   self.explosionEmitter = Prefab:Load(self.ExplosionEmitterPrefab)
end

function Script:UpdatePhysics()
   if self.Target ~= nil then
       self.entity:Follow(self.Target, self.Speed, self.Accel)

       self.animMgr:SetAnimationSequence(self.AnimSeq.Walk, 0.03, 200)
   end
end

function Script:Collision(entity, position, normal, speed)
   local type = entity:GetKeyValue("type", "")

   if type == "player" then
       self.entity:Hide()
       self.entity:SetMass(0)
       local pos = self.entity:GetPosition()
       pos.y = 1

       self.explosionEmitter:SetPosition(pos)
       self.explosionEmitter:Play()
   end
end

function Script:Draw()
   self.animMgr:Update()
end

[YouGroove]

You should ask to Josh.

 

I used particles, but not in prefab and i didn't tested stop/start.

I'll do a test tonight.

[Rick]

You should ask to Josh.

 

That's why I made this post in Bug Reports

 

I have the main character shooting (raycasting) and it plays a cartoon laser type sound. It does the raycasting out. When it hits the bomb I hide the model (because we can't Release() them yet without crashing the game), I play an explosion sound, and the last thing I need to do is to play the explosion emitter I have).

 

I made the bomb character a prefab, which has an emitter prefab assign to it. I then have a spawner script spawning bomb prefabs. If in debug mode the game runs, but still no emitter showing. If in release mode it crashes when it creates a bomb prefab instance with the error: Object reference count error. If I comment out the loading of the explosion emitter prefab, then I don't get this error in release mode.

[YouGroove]

That's what i was going to ask : how to release some entity easyly ?

I mean all that it contains like physics, sound Lua table etc ...

I know Release() just crashes even for simple entities.

 

-------------

 

About spawning what i recommend : Use a pool of objects some PoolManager.lua

 

Let's say you can have 10 bombs at same time : create a pool of 10

- create 10 at start

- init them as Hide(), Stop()

- or place them at Y=-5000 also

 

when you need to spawn one bomb :

- Take one from the pool array

- place it at spawnning position

- Start it's script

- Show() call to display it

 

When the bomb is out : Return it to the pool

- Call Hide(), Stop() script

- and place it at Y=-5000 also

 

That's 100 times faster than creating/destroying objects.

[Rick]

You are right that would be faster, but creation speed doesn't seem to be an issue so I'm not worried about it right now. Just want the basics working first. Optimizing something that isn't causing issues isn't something I'm interested in

[Josh]

Since your project does not include any code needed to produce this bug I cannot evaluate this. It works fine. I do not see your code above in the bomb Lua script.