Help me with particle effects

Ok, So I have particle effects working in PyOgre. They're pretty and all, I can move them around OK, etc., and I really like the system overall.

However, the only way I know of stopping the particles is to call ParticleSystemManager.destroySystem on them. This causes all the particles to instantly disappear, which is not what I'm looking for. I want the particles to fade out and disappear, not instantly disappear. Basically, I want the system to just stop emitting particles, not to delete it completely.

for i in range(particleSystem.numEmitters):
emitter = particleSystem.getEmitter(i)
emitter.enabled = False

Well, I tried it out, and i get
TypeError: range() integer end argument expected, got property.

That's strange, it works for me.
Is your code short enough to post here? If so, post it. Otherwise post the smallest code stub that still raises the exception.

from pyogre import ogre
import SampleFramework
import ode
import random

class myFrameListener(SampleFramework.FrameListener):
def __init__(self,renderWindow, camera,sceneManager):
SampleFramework.FrameListener.__init__(self,renderWindow,camera)
self.sceneManager = sceneManager
self.bullets = []
self.bulletnode = []
self.zup = True
self.xup = True
self.bulletspeed = 700

def frameStarted(self,evt): #here's the main loop
inputDevice = self.inputDevice
inputDevice.capture()
self.mover = ogre.Vector3(0,0,0) #thing to hold the movement
self.move = 100 #constant of movement
if inputDevice.isKeyDown(ogre.KC_UP):
self.mover.y += self.move
if inputDevice.isKeyDown(ogre.KC_DOWN):
self.mover.y -= self.move
if inputDevice.isKeyDown(ogre.KC_LEFT):
self.mover.x -= self.move
if inputDevice.isKeyDown(ogre.KC_RIGHT):
self.mover.x += self.move
nodePlayer = self.sceneManager.getSceneNode("PlayerNode")
nodePlayer.translate(self.mover * evt.timeSinceLastFrame)

if inputDevice.isKeyDown(ogre.KC_Z) & self.zup == True:
psm = ogre.ParticleSystemManager.getSingleton()
self.bullets.append(psm.createSystem('fountain'+str(len(self.bullets)), 'Examples/JetEngine2'))
self.bulletnode.append(self.sceneManager.rootSceneNode.createChildSceneNode())
self.bulletnode[-1].attachObject(self.bullets[-1])
self.bulletnode[-1].translate(self.sceneManager.getSceneNode("PlayerNode").position+(random.sample(xrange(50,100),1)[0],random.sample(xrange(-50,50),1)[0],1))
self.zup = False
if not inputDevice.isKeyDown(ogre.KC_Z):
self.zup = True

for x in range(len(self.bullets)):
self.bulletnode[x].translate((self.bulletspeed*evt.timeSinceLastFrame,0,0))

if inputDevice.isKeyDown(ogre.KC_X)& self.xup == True:
for x in range(len(self.bullets)):
#if len(self.bullets)>0:
psm = ogre.ParticleSystemManager.getSingleton()
#psm.destroySystem('fountain'+str(len(self.bullets)-1))
#psm._destroyEmitter('fountain'+str(len(self.bullets)-1))
for i in range(ogre.ParticleSystem.numEmitters):
emitter = ogreparticleSystem.getEmitter(i)
emitter.enabled = False
self.bullets.pop()
self.bulletnode.pop()
self.xup = False
if not inputDevice.isKeyDown(ogre.KC_X):
self.xup = True



return not inputDevice.isKeyDown(ogre.KC_ESCAPE)

class InitApp(SampleFramework.Application):
def _createScene(self):
sceneManager = self.sceneManager
sceneManager.ambientLight = (0.5,0.5,0.5)

entPlayer = sceneManager.createEntity("Player","razor.mesh");
entPlayer.setMaterialName('Examples/EnvMappedRustySteel')
nodePlayer = sceneManager.rootSceneNode.createChildSceneNode("PlayerNode")
nodePlayer.attachObject(entPlayer)
nodePlayer.yaw(ogre.Degree(90))

sceneManager.setSkyBox(True, "Examples/SpaceSkyBox")

cameraNode = sceneManager.rootSceneNode.createChildSceneNode()
cameraNode.attachObject(self.camera)
cameraNode.translate(0,0,500)

def _createCamera(self):
self.camera = self.sceneManager.createCamera("PlayerCam")
self.camera.nearClipDistance = 0.1

def _createFrameListener(self):
self.frameListener = myFrameListener(self.renderWindow, self.camera,self.sceneManager)
self.root.addFrameListener(self.frameListener)
self.frameListener.showDebugOverlay(True)

def _isPsycoEnabled(self):
return False

if __name__ == "__main__":
app = InitApp()
app.go()


There's the entire code.

Note 1: I'm still a bit of a noob at this, so this requires the "sampleframework.py" from the tutorials directory, along with some of those media files.

Note 2: Hit Z to shoot a particle, hit X to stop them. The particles will shoot downward, iirc. They're supposed to go to the right, but you'd have to edit the particles file to see it that way.

Looks like you are trying to retrieve the Emitter / Affector attributes from
ogre.ParticleSystem which is returning a type. You should be doing this from your ParticleSystem.

Since it looks like you are using pyOgre v1.0.6:

ps = psm.getSystem("Your Particle System Name")

Your code should look something like:

psm = ogre.ParticleSystemManager.getSingleton()
#psm.destroySystem('fountain'+str(len(self.bullets)-1))
#psm._destroyEmitter('fountain'+str(len(self.bullets)-1))

ps = psm.getSystem('fountain'+str(len(self.bullets)-1))
for i in range(ps.numEmitters):
emitter = ps.getEmitter(i)

...



Excellent! That worked great, thanks so much!

Now, to clean up my code... it's gotten uuuuglllly...