/[escript]/trunk/pyvisi_old/examples/surfacePlot.py
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Contents of /trunk/pyvisi_old/examples/surfacePlot.py

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Revision 637 - (show annotations)
Thu Mar 23 10:55:31 2006 UTC (13 years, 6 months ago) by gross
Original Path: trunk/pyvisi/examples/surfacePlot.py
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1 # $Id: surfacePlot.py,v 1.5 2005/11/10 08:38:06 paultcochrane Exp $
2
3 """
4 Example of plotting surfaces with pyvisi
5
6 @var __author__: name of author
7 @var __license__: licence agreement
8 @var __copyright__: copyrights
9 @var __url__: url entry point on documentation
10 @var __version__: version
11 @var __date__: date of the version
12 """
13
14 __copyright__=""" Copyright (c) 2006 by ACcESS MNRF
15 http://www.access.edu.au
16 Primary Business: Queensland, Australia"""
17 __license__="""Licensed under the Open Software License version 3.0
18 http://www.opensource.org/licenses/osl-3.0.php"""
19 __author__="Paul Cochrane"
20 __url__="http://www.iservo.edu.au/esys"
21 __version__="$Revision$"
22 __date__="$Date$"
23
24
25 import sys
26 numArgs = len(sys.argv)
27 if numArgs == 1:
28 ren_mod = "vtk"
29 else:
30 ren_mod = sys.argv[1]
31
32 # set up some data to plot
33 from Numeric import *
34
35 # the x and y axes
36 x = arange(-2,2,0.2, typecode=Float)
37 y = arange(-2,3,0.2, typecode=Float)
38
39 # pick some interesting function to generate the data in the third dimension
40 # this is the one used in the matlab docs: z = x*exp(-x^2-y^2)
41 z = zeros((len(x),len(y)), typecode=Float)
42
43 # boy do *I* feel old fashioned writing it this way
44 # surely there's another way to do it: - something to do later
45 for i in range(len(x)):
46 for j in range(len(y)):
47 z[i,j] = x[i]*exp(-x[i]*x[i] - y[j]*y[j])
48
49 # import the general pyvisi stuff
50 from esys.pyvisi import *
51 # import the gnuplot overrides of the interface
52 if ren_mod == "gnuplot":
53 from esys.pyvisi.renderers.gnuplot import *
54 elif ren_mod == "vtk":
55 from esys.pyvisi.renderers.vtk import *
56 elif ren_mod == "plplot":
57 from esys.pyvisi.renderers.plplot import *
58 else:
59 raise ValueError, "Unknown renderer module"
60
61 # define a scene object
62 # a Scene is a container for all of the kinds of things you want to put
63 # into your plot, for instance, images, meshes, arrow/vector/quiver
64 # plots, contour plots, spheres etc.
65 scene = Scene()
66
67 # create a SurfacePlot object
68 plot = SurfacePlot(scene)
69
70 # add some helpful info to the plot
71 plot.title = 'Example surface plot'
72 plot.xlabel = 'x'
73 plot.ylabel = 'y'
74 plot.zlabel = 'z'
75
76 # assign the data to the plot
77 # this version assumes that we have x, then y, then z and that z is 2D
78 # and that x and y are 1D arrays
79 plot.setData(x,y,z)
80 # alternative syntax
81 #plot.setData(xData=x, yData=y, zData=z)
82 # or (but more confusing depending upon one's naming conventions)
83 #plot.setData(x=x, y=y, z=z)
84
85 # render the scene to screen
86 scene.render(pause=True, interactive=True)
87
88 # save the scene to file
89 scene.save(fname="surfacePlot.png", format=PngImage())
90
91 # vim: expandtab shiftwidth=4:

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