[Visualpython-users] screensaver

[P. G. C. <ozr...@gm...>]

Hi all.
I'm trying to make an vpython scene work as an xscreensaver hack.
Everything seemed to be easy, just had to add a line in .xscreensaver like:

-             "My hack"     python /opt/ozp/xss.py &            \n\

and use scene.fullscreen=1 in my script.

The new hack appears in the list and I can choose it.

It is launched after inactivity and my scene looks quite well, but after
~30s it just dissappears.

I've read a lot and think the problem can be that the scene should be shown
in the root window and not just in a fullscreen window.
Now I don't know how to attack the problem.

I need help. Any idea?

Thank you very much.

If someone's interested, here's the script wich I wanted to be a screensaver
(it's quite simple but funny):


#!/usr/bin/python
# -*- coding: utf-8 -*-

from visual import *
from random import *

# Número total de partículas
parts=200
# Esta variable nos mostrará una visión objetiva (-1) o subjetiva (1) de la
escena
visual=1

scene=display()
scene.title='Chaothic Knot Conga'
scene.autoscale=0
scene.userzoom=0
scene.userspin=0
scene.fullscreen=1

# Paisaje
suelo=box(pos=(0,-10,0),color=color.blue,size=(30,0.01,30))
curve(color=color.blue,pos=[(15,10,15),(-15,10,15),(-15,10,-15),(15,10,-15),(15,10,15)])
curve(color=color.blue,pos=[(15,10,15),(15,-10,15)])
curve(color=color.blue,pos=[(-15,10,15),(-15,-10,15)])
curve(color=color.blue,pos=[(-15,10,-15),(-15,-10,-15)])
curve(color=color.blue,pos=[(15,10,-15),(15,-10,-15)])


print windowname
# Sólo genera un vector aleatorio
def seguidor():
    "Genera posiciones aleatoriamente en un cubo de lado 20"
    return(randint(-10,10),randint(-10,10),randint(-10,10))

seguidores=[]
segsvel=[]
i=0.

while i < parts:
    "Genera partículas con un gradiente de color"

seg=sphere(pos=seguidor(),radius=0.1,color=((parts-i)/parts,1-(parts-i)/parts,0.0))
    seguidores.append(seg)
    vel=vector(seguidor())
    segsvel.append(vel)
    i+=1

dt=1./25.
while 1:
    while mag2(segsvel[parts-1]) > 0.0001:
        "Mientras no se pare (o casi) la última"
        rate(25)
        i=1
        while i < parts:
            "Cada partícula persigue a su predecesora"
            seguidores[i].pos+=(segsvel[i])*dt
            segsvel[i]=(seguidores[i-1].pos-seguidores[i].pos)*2
            i+=1
        if visual == 1:
            "Perspectiva subjetiva"
            scene.center=seguidores[parts-1].pos
            scene.forward=segsvel[parts-1]
            scene.range=(.5,.5,.5)
        else:
            "Perspectiva objetiva"
            scene.center=(0,0,0)
            scene.forward=(0,0,-1)
            scene.range=(10,10,10)
        if scene.kb.keys:
            "Cambio de perspectiva"
            key=scene.kb.getkey()
            if key=='v':
                visual=visual*(-1)
    for i in seguidores:
        "Recolocación aleatoria de las partículas"
        i.pos=seguidor()
    segsvel[parts-1]=vector(1,1,1)


-- 
(^< -- Saludos, nerdigo
//'\
V_/_