/[escript]/trunk/pyvisi/examples/meshPlotExample.py
ViewVC logotype

Annotation of /trunk/pyvisi/examples/meshPlotExample.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 637 - (hide annotations)
Thu Mar 23 10:55:31 2006 UTC (14 years, 3 months ago) by gross
File MIME type: text/x-python
File size: 2924 byte(s)
more copyright statements added
1 cochrane 337 # $Id: meshPlotExample.py,v 1.2 2005/05/24 01:33:54 paultcochrane Exp $
2    
3     """
4     Example of plotting meshed surfaces with pyvisi
5 gross 637
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 cochrane 337 """
13    
14 gross 637 __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 cochrane 337 # what plotting method are we using?
26     method = 'pyvisi'
27    
28     # set up some data to plot
29     from Numeric import *
30    
31     # the x and y axes
32     x = arange(-2,2,0.2, typecode=Float)
33     y = arange(-2,3,0.2, typecode=Float)
34    
35     # pick some interesting function to generate the data in the third dimension
36     # this is the one used in the matlab docs: z = x*exp(-x^2-y^2)
37     z = zeros((len(x),len(y)), typecode=Float)
38    
39     # boy do *I* feel old fashioned writing it this way
40     # surely there's another way to do it: - something to do later
41     for i in range(len(x)):
42     for j in range(len(y)):
43     z[i,j] = x[i]*exp(-x[i]*x[i] - y[j]*y[j])
44    
45     # plot it with either gnuplot, vtk or pyvisi
46     if method == 'pyvisi':
47     #### pyvisi version of code
48    
49     # import the general pyvisi stuff
50 gross 605 from esys.pyvisi import *
51 cochrane 337 # import the gnuplot overrides of the interface
52 gross 605 from esys.pyvisi.renderers.gnuplot import *
53 cochrane 337
54     # define a scene object
55     # a Scene is a container for all of the kinds of things you want to put
56     # into your plot, for instance, images, meshes, arrow/vector/quiver
57     # plots, contour plots, spheres etc.
58     scene = Scene()
59    
60     # create a MeshPlot object
61     plot = MeshPlot(scene)
62    
63     # add some helpful info to the plot
64     plot.title = 'Example mesh plot'
65     plot.xlabel = 'x'
66     plot.ylabel = 'y'
67     plot.zlabel = 'z'
68    
69     # assign the data to the plot
70     # this version assumes that we have x, then y, then z and that z is 2D
71     # and that x and y are 1D arrays
72     plot.setData(x,y,z)
73     # alternative syntax
74     #plot.setData(xData=x, yData=y, zData=z)
75     # or (but more confusing depending upon one's naming conventions)
76     #plot.setData(x=x, y=y, z=z)
77    
78     # render the scene to screen
79     scene.render(pause=True, interactive=True)
80    
81     # save the scene to file
82     plot.setData(x,y,z) # have to do this now because we've already
83     # render()ed the scene. This requirement will be
84     # removed in the future
85     scene.save(fname="meshPlot.png", format=PngImage())
86    
87     elif method == 'vtk':
88     print "vtk mesh plotting not yet implemented"
89    
90     else:
91     print "Eeek! What plotting method am I supposed to use???"
92    
93     # vim: expandtab shiftwidth=4:

  ViewVC Help
Powered by ViewVC 1.1.26