ok, so this should work on sagenb:
{{{
%sh
mkdir /tmp/username_temp
}}}
{{{
c = polytopes.icosahedron()
label = 'Ico_movie'
DATA = '/tmp/mh_temp/'
# Numerical pi predefined for some speed
npi = RDF(pi)
#A rotation matrix
def rot(i,j,th):
q = matrix(RDF,3)
for k in range(3):
q[k,k] = 1.0
q[i,i] = cos(th)
q[j,j] = cos(th)
q[i,j] = sin(th)
q[j,i] = -sin(th)
return q
index = 0
for theta in srange(0,2*npi,npi/10):
vs = c.vertices()[:]
#rotate the vertices:
vs = [rot(0,1,theta)*vector(v) for v in vs]
edgedata = c.vertex_adjacencies()
facedata = c.triangulated_facial_incidences()
#Set up Tachyon.
#use small xres, yres for speed.
#antialiasing helps things lookbetter.
t = Tachyon(xres = 250, yres = 250, antialiasing = True)
t.texture('e1', color = (0,0,1))
t.texture('f1',opacity = .5, color = (1,0,0))
t.light((2,2,2), 0.1, (1,1,1))
#Draw edges:
edges = []
for anedge in edgedata:
v0 = anedge[0]
for v1 in anedge[1]:
if v1 > v0:
edges.append([vs[v0],vs[v1]])
for anedge in edges:
t.fcylinder(anedge[0],anedge[1],.01,'e1')
#Draw transparent faces:
for atri in facedata:
t.triangle(vs[atri[1][0]],vs[atri[1][1]],vs[atri[1][2]],'f1')
#Make file names in order for ffmpeg
str_index = '0'*(3-len(str(index)))+str(index)
t.save(DATA+label+ str_index + '.png')
index += 1
#Add a black final frame,
#since otherwise the compression in ffmpeggets confused.
t = Tachyon(xres = 250, yres = 250, antialiasing = True)
str_index = '0'*(3-len(str(index)))+str(index)
t.save(DATA+label+ str_index + '.png')
#Use ffmpeg to animate:
os.system('ffmpeg -qmax 2 -i ' + DATA + label + '%3d.png ./test.mp4')
}}}
On Jan 15, 9:34 pm, mabshoff <[email protected]
dortmund.de> wrote:
> On Jan 15, 7:31 pm, "Justin C. Walker" <[email protected]> wrote:
>
> > On Jan 15, 2009, at 19:02 , mabshoff wrote:
>
> <SNIP>
>
> > > Just use /tmp or DOT_SAGE/tmp, but create a directory in it so you
> > > don't clobber other jobs of the same kind. It might be a good idea to
> > > add some create_tmpdir() command in Sage that is guaranteed to be
> > > unique and is in a writable directory, i.e. it should first try
> > > DOT_SAGE/tmp, then /tmp and so on. IIRC there is even some env
> > > variable where we can point a per user tmp dir to. So you might want
> > > to open a ticket for the above in order to avoid various people doing
> > > the same thing in their own code over and over again.
>
> > Python has several calls to make temporary files that will not be
> > clobbered by other users or uses. No need to make directories.
>
> Yes, but we are ending up calling command line tools which to not obey
> Python's convention :)
>
> And having all the files in one directory makes debugging a lot easier
> and it assures that you get rid of all files by just wiping the one
> tmp directory.
>
> > Justin
>
> Cheers,
>
> Michael
>
> > --
> > Justin C. Walker, Curmudgeon at Large
> > Institute for the Absorption of Federal Funds
> > --
> > Democracy is two wolves and a lamb
> > voting on what to have for lunch.
> > Liberty is a well-armed lamb contesting
> > the vote.
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