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## Automatically adapted for scipy Oct 31, 2005 by
# Copyright (c) 1996, 1997, The Regents of the University of California.
# All rights reserved. See Legal.htm for full text and disclaimer.
from graph3d import *
from mesh3d import *
from surface import *
from scipy import *
from numpy.core.umath import *
from gistfuncs import *
def paws ( ) :
i = raw_input ("Type in any string to continue; ^C to return to prompt. ")
return
def demo (*i) :
x = span (-1, 1, 64, 64)
y = transpose (x)
z = (x + y) * exp (-6.*(x*x+y*y))
if len (i) == 0 or i [0] == 1 :
s1 = Surface (z = z, opt_3d = "wm", mask = "sort")
g1 = Graph3d (s1, color_card = "gray.gp", titles = "opaque wire mesh", y_factor = 2.)
g1.plot ()
paws ()
s1.set (mask = "none")
g1.change (titles = "transparent wire mesh")
g1.plot ()
paws ()
s1.set (ecolor = "red")
g1.change (titles = "transparent wire mesh in red")
g1.plot ()
paws ()
s1.set (mask = "sort", shade = 1)
g1.change (titles = "opaque shaded mesh with red lines")
g1.plot ()
paws ()
s1.set (opt_3d = "none")
g1.change (titles = "opaque shaded mesh with no lines")
g1.plot ()
paws ()
g1.change (titles = "same with different lighting")
g1.quick_plot (diffuse=.1, specular = 1., sdir=array([0,0,-1]))
paws ()
s1.set (c = z - min (ravel (z)), opt_3d = "s4", shade = 0)
g1.change (color_card = "rainbow.gp",
titles = "surface shaded according to height")
g1.plot ()
paws ()
if len (i) == 0 or i [0] == 2 :
s1 = Surface (z = z, opt_3d = "none", mask = "sort", shade = 1)
# The purpose of the try clause is to prevent creation of a new Graph
# object if g1 already exists. Creation of a new one forces the
# current Plotter(s) to close and new one(s) to open. When working
# with Xwindows, this leads to annoying popping of windows in and
# out of existence.
try:
g1 = g1
except:
g1 = Graph3d (s1, ambient = 0.2, diffuse = .2, specular = 1.,
color_card = "gray.gp", titles = "backlit surface", y_factor = 2.)
else:
g1.new (s1, ambient = 0.2, diffuse = .2, specular = 1.,
color_card = "gray.gp", titles = "backlit surface", y_factor = 2.)
g1.plot ()
paws ()
g1.change (titles = "moving light source")
g1.move_light_source ()
paws ()
if len (i) == 0 or i [0] == 3 :
nx = 20
ny = 20
nz = 20
xyz = zeros ( (3, nx, ny, nz), Float)
xyz [0] = multiply.outer ( span (-1, 1, nx), ones ( (ny, nz), Float))
xyz [1] = multiply.outer ( ones (nx, Float),
multiply.outer ( span (-1, 1, ny), ones (nz, Float)))
xyz [2] = multiply.outer ( ones ( (nx, ny), Float), span (-1, 1, nz))
r = sqrt (xyz [0] ** 2 + xyz [1] **2 + xyz [2] **2)
theta = arccos (xyz [2] / r)
phi = arctan2 (xyz [1] , xyz [0] + logical_not (r))
y32 = sin (theta) ** 2 * cos (theta) * cos (2 * phi)
m1 = Mesh3d (x = span (-1, 1, nx),
y = span (-1, 1, ny),
z = span (-1, 1, nz),
c = r * (1. + y32))
del r, theta, phi, xyz, y32
s1 = sslice (m1, .50, varno = 1) # , opt_3d = "f3") # (inner isosurface)
s2 = sslice (m1, 1.0, varno = 1) # , opt_3d = "f3") # (outer isosurface)
pxy = Plane (array ([0., 0., 1.], Float ), zeros (3, Float))
pyz = Plane (array ([1., 0., 0.], Float ), zeros (3, Float))
# pseudo-colored plane slice, then cut it in half and save
# only the front half
s3 = sslice (m1, pyz, opt_3d = ["wm", "f4"])
s3 = sslice (s3, pxy, nslices = 1, opt_3d = ["wm", "f4"])
# cut the inner isosurface in half so that we can slice the
# top off one of the halves:
[s1, s4] = sslice (s1, pxy, nslices = 2) #, opt_3d = "f3")
s1 = sslice (s1, - pyz) #, opt_3d = "f3")
# do the same with the outer isosurface:
[s2, s5] = sslice (s2, pxy, nslices = 2) #, opt_3d = "f3")
s2 = sslice (s2, - pyz) #, opt_3d = "f3")
# The purpose of the try clause is to prevent creation of a new Graph
# object if g1 already exists. Creation of a new one forces the
# current Plotter(s) to close and new one(s) to open. When working
# with Xwindows, this leads to annoying popping of windows in and
# out of existence.
try:
g1 = g1
except:
g1 = Graph3d ([s3, s1, s4, s2, s5], gnomon = 1, color_card =
"rainbowhls", diffuse = .2, specular = 1,
mask = "min", split = 1) # opt_3d = ["f4"],
else:
g1.new ([s3, s1, s4, s2, s5], gnomon = 1, color_card =
"rainbowhls", diffuse = .2, specular = 1,
mask = "min", split = 1)
paws ()
g1.plot ()
paws ()
g1.change (x_factor = 2., y_factor = 2.)
g1.rotate ()
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