/usr/share/pyshared/scitools/easyviz/dx_.py is in python-scitools 0.9.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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This backend is based on OpenDX (www.opendx.org) which is the open source
version of IBM's Visualization Data Explorer and is a powerfull, full-
featured software package for visualization of scientific, engineering
and analytical data. The connection with Python is handled by py2dx which
is available for download at http://www.psc.edu/~eschenbe/. This backend
can be used by
python somefile.py --SCITOOLS_easyviz_backend dx
or one can specify the backend in the SciTools configuration file
scitools.cfg under the [easyviz] section
[easyviz]
backend = dx
and then
from scitools.std import *
or if just easyviz is needed
from scitools.easyviz import *
REQUIREMENTS:
OpenDX
py2dx
Tips:
* The following is an example on how one can send commands directly to DX:
g = get_backend()
g('<your DX command here>')
* The complete DX script can be saved to disk for running at a later stage.
See save_script and its doc string for further details.
TODO:
* Set axis limits. Use the ClipBox module. Problems with AutoAxes.
* Add support for vector fields in two and three dimensions. In 3D we can
create the vector field by
f = open('vector3D.dat', 'w')
nx, ny = shape(z)
for i in iseq(nx-1):
for j in iseq(ny-1):
f.write('%5.3lf\t%5.3lf\t%5.3lf\t%5.3lf\t%5.3lf\t%5.3lf\n' % \
(x[i,j],y[i,j],z[i,j],u[i,j],v[i,j],w[i,j]))
f.close()
and then use a general header file like this
file = vector3D.dat
points = 25
format = ascii
interleaving = field
field = locations, field0
structure = 3-vector, 3-vector
type = float, float
end
Then use the AutoGlyph/Glyph module in DX to create arrows or use
Streamline alone or together with Ribbon/Tube.
(Similar applies to 2D vector fields)
* Fix problems with camera.
* Look more into scaling of data fields.
* Implement different colormaps.
* Is it possible to implement the coneplot command?
* Add support for the isocaps command:
isocaps = CappedIsosurfaceMacro(data,isovalue,capDir=0);
Problem: Not only isocaps but also complete isosurface.
* How can we treat NaNs?
(see http://www.opendx.org/cgi-bin/forum/YaBB.pl?num=1155198504)
* Let _DXFigure be based on DXServer rather than just DX.
* In addition look at curve plotting (Plot module), caxis, colorbar,
meshc/surfc, ...
"""
from __future__ import division
from common import *
from scitools.globaldata import DEBUG, VERBOSE
from scitools.misc import test_if_module_exists
test_if_module_exists('DX', msg='You need to install the py2dx package.', abort=False)
import DX
import Tkinter
import tempfile
DXMACROS = '/usr/share/dx/samples/macros'
DXMACROS = os.environ.get('DXMACROS', DXMACROS)
class _DXFigure(object):
def __init__(self, plt, width=640, height=480, depth=24, title='',
hw_render_mode='opengl'):
# create the GUI:
self.plt = plt
self.width = width
self.height = height
self.master = plt._master
self.root = Tkinter.Toplevel(self.master)
self.root.title(title)
self.root.protocol("WM_DELETE_WINDOW", self.close)
self.root.bind("<KeyPress-q>", self.close)
self.root.minsize(200, 200)
self.root.geometry('%sx%s' % (width,height))
self.root.withdraw()
self.frame = Tkinter.Frame(self.root, relief='sunken', bd=2)
self.frame.pack(side='top', fill='both', expand=1)
#button = Tkinter.Button(self.root, text="Quit", command=self.close)
#button.pack()
# start DX:
cmd = DX.DXEXEC + ' -execonly -hwrender opengl'
self.conn = DX.DXLStartDX(cmd, None)
#DX.DXLLoadMacroDirectory(self.conn, DXMACROS)
# hack for loading necessary macro files:
DX.exDXLLoadScript(self.conn,
os.path.join(DXMACROS, "ArrangeMemberMacro.net"))
DX.exDXLLoadScript(self.conn,
os.path.join(DXMACROS, "CappedIsoMacro.net"))
self.script = ''
def __call__(self, cmd):
self.send(cmd)
def send(self, cmd):
if not isinstance(cmd, str):
raise ValueError('DX command must be string, not %s' \
% type(cmd))
self.script += cmd + '\n'
if not cmd.startswith('//'): # don't send comments to DX
DX.DXLSend(self.conn, cmd)
def reset(self):
self.script = ''
DX.DXLEndExecuteOnChange(self.conn)
DX.DXLSync(self.conn)
def close(self, event=None):
self.plt.clf()
self.root.withdraw()
def display(self, show=True):
if show:
self.root.deiconify()
self.root.update()
DX.DXLExecuteOnChange(self.conn)
DX.WaitForDXIdle(self.conn)
#DX.DXLExecuteOnce(self.conn)
#DX.uiDXLOpenVPE(self.conn)
def exit(self):
self.root.destroy()
DX.WaitForDXIdle(self.conn)
DX.DXLExitDX(self.conn)
class DXBackend(BaseClass):
def __init__(self):
BaseClass.__init__(self)
self._init()
def _init(self, *args, **kwargs):
"""Perform initialization that is special for this backend."""
self._master = Tkinter.Tk()
self._master.withdraw()
self.figure(self.getp('curfig'))
# conversion tables for format strings:
self._markers = {
'': None, # no marker
'.': None, # dot
'o': None, # circle
'x': None, # cross
'+': None, # plus sign
'*': None, # asterisk
's': None, # square
'd': None, # diamond
'^': None, # triangle (up)
'v': None, # triangle (down)
'<': None, # triangle (left)
'>': None, # triangle (right)
'p': None, # pentagram
'h': None, # hexagram
}
self._colors = {
'': None, # no color --> blue
'r': "red", # red
'g': "green", # green
'b': "blue", # blue
'c': "cyan", # cyan
'm': "magenta", # magenta
'y': "yellow", # yellow
'k': "black", # black
'w': "white", # white
}
self._line_styles = {
'': None, # no line
'-': None, # solid line
':': None, # dotted line
'-.': None, # dash-dot line
'--': None, # dashed line
}
# convert table for colorbar location:
self._colorbar_locations = {
'North': None,
'South': None,
'East': None,
'West': None,
'NorthOutside': None,
'SouthOutside': None,
'EastOutside': None,
'WestOutside': None,
}
if DEBUG:
print "Setting backend standard variables"
for disp in 'self._markers self._colors self._line_styles'.split():
print disp, eval(disp)
def _set_scale(self, ax):
"""Set linear or logarithmic (base 10) axis scale."""
if DEBUG:
print "Setting scales"
scale = ax.getp('scale')
if scale == 'loglog':
# use logarithmic scale on both x- and y-axis
pass
elif scale == 'logx':
# use logarithmic scale on x-axis and linear scale on y-axis
pass
elif scale == 'logy':
# use linear scale on x-axis and logarithmic scale on y-axis
pass
elif scale == 'linear':
# use linear scale on both x- and y-axis
pass
def _set_labels(self, ax):
"""Add text labels for x-, y-, and z-axis."""
if DEBUG:
print "Setting labels"
xlabel = ax.getp('xlabel')
ylabel = ax.getp('ylabel')
zlabel = ax.getp('zlabel')
self._g('labels = {"%s","%s","%s"};' % (xlabel,ylabel,zlabel))
def _set_title(self, ax):
"""Add a title at the top of the axis."""
if DEBUG:
print "Setting title"
title = self._fix_latex(ax.getp('title'))
self._g('title = "%s";' % title)
self._g('caption = Caption(title,[0.5,0.98],font="fixed");')
self._g('collected = Append(collected,caption);')
def _set_limits(self, ax):
"""Set axis limits in x, y, and z direction."""
if DEBUG:
print "Setting axis limits"
mode = ax.getp('mode')
if mode == 'auto':
# let plotting package set 'nice' axis limits in the x, y,
# and z direction. If this is not automated in the plotting
# package, one can use the following limits:
xmin, xmax, ymin, ymax, zmin, zmax = ax.get_limits()
elif mode == 'manual':
# (some) axis limits are frozen
xmin = ax.getp('xmin')
xmax = ax.getp('xmax')
if xmin is not None and xmax is not None:
# set x-axis limits
pass
else:
# let plotting package set x-axis limits or use
xmin, xmax = ax.getp('xlim')
ymin = ax.getp('ymin')
ymax = ax.getp('ymax')
if ymin is not None and ymax is not None:
# set y-axis limits
pass
else:
# let plotting package set y-axis limits or use
ymin, ymax = ax.getp('ylim')
zmin = ax.getp('zmin')
zmax = ax.getp('zmax')
if zmin is not None and zmax is not None:
# set z-axis limits
pass
else:
# let plotting package set z-axis limits or use
zmin, zmax = ax.getp('zlim')
elif mode == 'tight':
# set the limits on the axis to the range of the data. If
# this is not automated in the plotting package, one can
# use the following limits:
xmin, xmax, ymin, ymax, zmin, zmax = ax.get_limits()
elif mode == 'fill':
# not sure about this
xmin, xmax, ymin, ymax, zmin, zmax = ax.get_limits()
# scale limits according to data aspect ratio:
dar = ax.getp('daspect')
xmin /= dar[0]; xmax /= dar[0]
ymin /= dar[1]; ymax /= dar[1]
zmin /= dar[2]; zmax /= dar[2]
# create vector to be used in AutoAxes later:
self._g('axislimits = {[%s,%s,%s],[%s,%s,%s]};' % \
(xmin,ymin,zmin,xmax,ymax,zmax))
#self._g('clipped = ClipBox(collected,axislimits);')
#self._g('collected = Collect(clipped);')
def _set_position(self, ax):
"""Set axes position."""
rect = ax.getp('viewport')
if rect:
# axes position is defined. In Matlab rect is defined as
# [left,bottom,width,height], where the four parameters are
# location values between 0 and 1 ((0,0) is the lower-left
# corner and (1,1) is the upper-right corner).
# NOTE: This can be different in the plotting package.
pass
def _set_daspect(self, ax):
"""Set data aspect ratio."""
if ax.getp('daspectmode') == 'manual':
dar = ax.getp('daspect') # dar is a list (len(dar) is 3).
self._g('daspect = [%s %s %s];' % (dar[0],dar[1],dar[2]))
else:
# daspectmode is 'auto'. Plotting package handles data
# aspect ratio automatically.
pass
def _set_axis_method(self, ax):
method = ax.getp('method')
if method == 'equal':
# tick mark increments on the x-, y-, and z-axis should
# be equal in size.
pass
elif method == 'image':
# same effect as axis('equal') and axis('tight')
pass
elif method == 'square':
# make the axis box square in size
pass
elif method == 'normal':
# full size axis box
pass
elif method == 'vis3d':
# freeze data aspect ratio when rotating 3D objects
pass
def _set_coordinate_system(self, ax):
"""
Use either the default Cartesian coordinate system or a
matrix coordinate system.
"""
direction = ax.getp('direction')
if direction == 'ij':
# Use matrix coordinates. The origin of the coordinate
# system is the upper-left corner. The i-axis should be
# vertical and numbered from top to bottom, while the j-axis
# should be horizontal and numbered from left to right.
pass
elif direction == 'xy':
# use the default Cartesian axes form. The origin is at the
# lower-left corner. The x-axis is vertical and numbered
# from left to right, while the y-axis is vertical and
# numbered from bottom to top.
pass
def _set_box(self, ax):
"""Turn box around axes boundary on or off."""
if DEBUG:
print "Setting box"
if ax.getp('box'):
# display box
self._g('show_box = 1;')
else:
# do not display box
self._g('show_box = 0;')
def _set_grid(self, ax):
"""Turn grid lines on or off."""
if DEBUG:
print "Setting grid"
if ax.getp('grid'):
# turn grid lines on
self._g('show_grid = 1;')
else:
# turn grid lines off
self._g('show_grid = 0;')
def _set_hidden_line_removal(self, ax):
"""Turn on/off hidden line removal for meshes."""
if DEBUG:
print "Setting hidden line removal"
if ax.getp('hidden'):
# turn hidden line removal on
pass
else:
# turn hidden line removal off
pass
def _set_colorbar(self, ax):
"""Add a colorbar to the axis."""
if DEBUG:
print "Setting colorbar"
cbar = ax.getp('colorbar')
if cbar.getp('visible'):
# turn on colorbar
cbar_title = cbar.getp('cbtitle')
cbar_location = self._colorbar_locations[cbar.getp('cblocation')]
#xpos, ypos, length, width, horiz = cbar_location
#self._g('cbar = ColorBar(collected);')
#self._g('collected = Append(collected,cbar);')
else:
# turn off colorbar
pass
def _set_caxis(self, ax):
"""Set the color axis scale."""
if DEBUG:
print "Setting caxis"
if ax.getp('caxismode') == 'manual':
cmin, cmax = ax.getp('caxis')
# NOTE: cmin and cmax might be None:
if cmin is None or cmax is None:
cmin, cmax = [0,1]
# set color axis scaling according to cmin and cmax
pass
else:
# use autoranging for color axis scale
pass
def _set_colormap(self, ax):
"""Set the colormap."""
if DEBUG:
print "Setting colormap"
cmap = ax.getp('colormap')
# cmap is plotting package dependent
def _set_view(self, ax):
"""Set viewpoint specification."""
if DEBUG:
print "Setting view"
cam = ax.getp('camera')
view = cam.getp('view')
width = self._g.width
height = self._g.height
self._g('resolution = %s;' % width)
self._g('aspect = %f;' % ((height)/width))
if view == 2:
# setup a default 2D view
#self._g('camtarget = collected;')
#self._g('campos = Direction(0, 90, 10);')
#self._g('camup = [0,1,0];')
#self._g('camva = 30;')
#self._g('camproj = 0;')
self._g('camera = AutoCamera(collected);')
elif view == 3:
az = cam.getp('azimuth')
el = cam.getp('elevation')
if az is None or el is None:
# azimuth or elevation is not given. Set up a default
# 3D view (az=-37.5 and el=30 is the default 3D view in
# Matlab).
self._g('campos = Direction(-37.5, 30, 10);')
else:
# set a 3D view according to az and el
self._g('campos = Direction(%s, %s, 10);' % (az,el))
if cam.getp('cammode') == 'manual':
# for advanced camera handling:
roll = cam.getp('camroll')
zoom = cam.getp('camzoom')
dolly = cam.getp('camdolly')
target = cam.getp('camtarget')
position = cam.getp('campos')
assert target != position, \
'camera target and position cannot be equal'
up_vector = cam.getp('camup')
view_angle = cam.getp('camva')
projection = cam.getp('camproj')
self._g('camtarget = [%s,%s,%s];' % target)
self._g('campos = [%s,%s,%s];' % position)
self._g('camup = [%s,%s,%s];' % up_vector)
if view_angle is None:
view_angle = 30;
self._g('camva = %s;' % view_angle)
if projection == 'perspective':
self._g('camproj = 1;')
else:
self._g('camproj = 0;')
else:
# set up some default values:
self._g('camtarget = collected;')
self._g('camproj = 0;')
self._g('camup = [0,0,1];')
self._g('camva = 30;')
#self._g('camera = Camera(to=camtarget, from=campos, ' +
# 'resolution=resolution, aspect=aspect, up=camup, ' +
# 'angle=camva, ' +
# 'perspective=camproj, background="black");')
# use AutoCamera instead:
self._g('camera = AutoCamera(camtarget, "off-bottom");')
def _set_axis_props(self, ax):
if DEBUG:
print "Setting axis properties"
self._set_title(ax)
self._set_scale(ax)
self._set_limits(ax)
self._set_position(ax)
self._set_axis_method(ax)
self._set_daspect(ax)
self._set_coordinate_system(ax)
self._set_hidden_line_removal(ax)
self._set_colorbar(ax)
self._set_caxis(ax)
self._set_colormap(ax)
self._g('iact_mode = CollectNamed(2, "mode");') # 2 = ROTATE
hw_render_mode = 'opengl'
hw_render_approx = 'none'
if hw_render_mode == "none":
options = '"rendering mode", "software"'
else:
options = '"rendering mode", "hardware", ' + \
('"rendering approximation", "%s"' % hw_render_approx)
options = options + ', "interaction mode", iact_mode'
self._g('collected = Options(collected, %s);' % options)
self._set_view(ax)
if ax.getp('visible'):
self._set_labels(ax)
self._set_box(ax)
self._set_grid(ax)
self._g('objectwithaxes = AutoAxes(collected, camera, labels, ' +
'frame=show_box, corners=collected, grid=show_grid, ' +
'colors={"red","yellow","yellow"}, ' +
'annotation={"grid","labels","ticks"});')
#self._g('objectwithaxes = Scale(objectwithaxes, daspect);')
self._g('camera = UpdateCamera(camera,objectwithaxes);')
self._g('renderable = objectwithaxes;')
else:
# turn off all axis labeling, tickmarks, and background
self._g('renderable = collected;')
def _create_2D_vector_field(x, y, u, v):
pass
def _create_3D_vector_field(x, y, z, u, v, w):
dataf = "x y z u v w"
"""file = /tmp/vector3D.dat
points = 25
format = ascii
interleaving = field
field = locations, field0
structure = 3-vector, 3-vector
type = float, float
end
"""
pass
def _create_2D_scalar_data_file(self, x, y, z,
regular_grid=False, indexing='ij'):
tmp = tempfile.mktemp()
# first create data file:
data_file = open(tmp+'.dat', 'w')
nx, ny = shape(z)
if regular_grid:
for i in range(nx):
for j in range(ny):
data_file.write("%5.3lf\t" % z[i,j])
data_file.write("\n")
else:
if shape(x) != (nx,ny) and shape(y) != (nx,ny):
x, y = ndgrid(x,y,sparse=False)
for i in range(nx):
for j in range(ny):
data_file.write("%5.3lf\t%5.3lf\t%5.3lf\n" % \
(x[i,j],y[i,j],z[i,j]))
data_file.write("\n")
data_file.close()
# then create general header file:
header_file = open(tmp+'.general', 'w')
if regular_grid:
x0 = x[0,0]
y0 = y[0,0]
if indexing == 'ij':
dx = x[1,0] - x[0,0]
dy = y[0,1] - y[0,0]
else:
dx = x[0,1] - x[0,0]
dy = y[1,0] - y[0,0]
header_file.write("""file = %s
grid = %d x %d
format = ascii
interleaving = record
majority = row
field = field0
structure = scalar
type = float
dependency = positions
positions = regular, regular, %s, %s, %s, %s
end
""" % (data_file.name,nx,ny,x0,dx,y0,dy))
else:
header_file.write("""file = %s
grid = %d x %d
format = ascii
interleaving = field
majority = row
field = locations, field0
structure = 2-vector, scalar
type = float, float
end
""" % (data_file.name,nx,ny))
header_file.close()
return header_file.name
def _create_3D_scalar_data_file(self, x, y, z, v,
regular_grid=False, indexing='ij'):
tmp = tempfile.mktemp()
# create data file:
data_file = open(tmp+'.dat', 'w')
nx, ny, nz = shape(v)
if regular_grid:
for i in range(nx):
for j in range(ny):
for k in range(nz):
data_file.write("%5.3lf\t" % v[i,j,k])
data_file.write("\n")
else:
if shape(x) != (nx,ny,nz) and shape(y) != (nx,ny,nz) \
and shape(z) != (nx,ny,nz):
x, y, z = ndgrid(x,y,z,sparse=False)
for i in range(nx):
for j in range(ny):
for k in range(nz):
data_file.write("%5.3lf\t%5.3lf\t%5.3lf\t%5.3lf\n" % \
(x[i,j,k],y[i,j,k],z[i,j,k],v[i,j,k]))
data_file.write("\n")
data_file.close()
# create general header file:
header_file = open(tmp+'.general', 'w')
if regular_grid:
x0 = x[0,0,0]
y0 = y[0,0,0]
z0 = z[0,0,0]
if indexing == 'ij':
dx = x[1,0,0] - x[0,0,0]
dy = y[0,1,0] - y[0,0,0]
dz = z[0,0,1] - z[0,0,0]
else:
dx = x[0,1,0] - x[0,0,0]
dy = y[1,0,0] - y[0,0,0]
dz = z[0,0,1] - z[0,0,0]
header_file.write("""file = %s
grid = %d x %d x %d
format = ascii
interleaving = record
majority = row
field = field0
structure = scalar
type = float
dependency = positions
positions = regular, regular, regular, %s, %s, %s, %s, %s, %s
end
""" % (data_file.name,nx,ny,nz,x0,dx,y0,dy,z0,dz))
else:
header_file.write("""file = %s
grid = %d x %d x %d
format = ascii
interleaving = field
majority = row
field = locations, field0
structure = 3-vector, scalar
type = float, float
end
""" % (data_file.name,nx,ny,nz))
header_file.close()
return header_file.name
def _create_2D_scalar_field(self, x, y, z, id,
regular_grid=False,
indexing='ij'):
nx, ny = shape(z)
if shape(x) != (nx,ny) and shape(y) != (nx,ny):
x, y = ndgrid(x,y,sparse=False,indexing=indexing)
# the scalar field should be a string on the form
# 'z0 z1 z2 ... zn' where n=nx*ny*nz:
z = ravel(z).tolist()
scalar_field = ' '.join([str(i) for i in z])
data = 'data%s' % id
if regular_grid:
x0 = x[0,0]
y0 = y[0,0]
if indexing == 'ij':
dx = x[1,0] - x0
dy = y[0,1] - y0
else:
dx = x[0,1] - x0
dy = y[1,0] - y0
self._g('%s = Construct([%s %s],[%s %s],[%s %s],{%s});' % \
(data,x0,y0,dx,dy,nx,ny,scalar_field))
else:
x = ravel(x).tolist()
y = ravel(y).tolist()
# create a string with grid positions on the form
# '[x0 y0][x1 y0] ... [xn y0][x0 y1] ... [xn yn]':
positions = ''.join(['[%s %s]' % (xp,yp) for xp, yp in zip(x,y)])
self._g('%s = Construct({%s},NULL,[%d %d],{%s});' % \
(data,positions,nx,ny,scalar_field))
return data
def _create_3D_scalar_field(self, x, y, z, v, id,
regular_grid=False,
indexing='ij'):
nx, ny, nz = shape(v)
if shape(x) != (nx,ny,nz) and shape(y) != (nx,ny,nz) \
and shape(z) != (nx,ny,nz):
x, y, z = ndgrid(x,y,z,sparse=False,indexing=indexing)
# the scalar field should be a string on the form
# 'z0 z1 z2 ... zn' where n=nx*ny*nz:
v = ravel(v).tolist()
scalar_field = ' '.join([str(i) for i in v])
data = 'data%s' % id
if regular_grid:
x0 = x[0,0,0]
y0 = y[0,0,0]
z0 = z[0,0,0]
if indexing == 'ij':
dx = x[1,0,0] - x0
dy = y[0,1,0] - y0
dz = z[0,0,1] - z0
else:
dx = x[0,1,0] - x0
dy = y[1,0,0] - y0
dz = z[0,0,1] - z0
self._g('%s = Construct([%s %s %s],[%s %s %s],[%s %s %s],{%s});' \
% (data,x0,y0,z0,dx,dy,dz,nx,ny,nz,scalar_field))
else:
x = ravel(x).tolist()
y = ravel(y).tolist()
z = ravel(z).tolist()
# create a string with grid positions on the form
# '[x0 y0 z0][x1 y0 z0] ... [xn y0 z0][x0 y1 z0] ... [xn yn zn]'
positions = ''.join(['[%s %s %s]' % (xp,yp,zp) \
for xp, yp, zp in zip(x,y,z)])
self._g('%s = Construct({%s},NULL,[%d %d %d],{%s});' % \
(data,positions,nx,ny,nz,scalar_field))
return data
def _get_linespecs(self, item):
"""
Return the line marker, line color, line style, and
line width of the item.
"""
marker = self._markers[item.getp('linemarker')]
color = self._colors[item.getp('linecolor')]
style = self._line_styles[item.getp('linetype')]
width = item.getp('linewidth')
return marker, color, style, width
def _add_line(self, item):
"""Add a 2D or 3D curve to the scene."""
if DEBUG:
print "Adding a line"
# get data:
x = item.getp('xdata')
y = item.getp('ydata')
z = item.getp('zdata')
# get line specifiactions:
marker, color, style, width = self._get_linespecs(item)
if z is not None:
# zdata is given, add a 3D curve:
pass
else:
# no zdata, add a 2D curve:
pass
def _add_surface(self, item, id, shading='faceted'):
if DEBUG:
print "Adding a surface"
x = item.getp('xdata') # grid component in x-direction
y = item.getp('ydata') # grid component in y-direction
z = item.getp('zdata') # scalar field
c = item.getp('cdata') # pseudocolor data (can be None)
indexing = item.getp('indexing')
#general_file = self._create_2D_scalar_data_file(x, y, z,
# regular_grid=False,
# indexing=indexing)
#self._g('imported%s = Import("%s",format="general");' \
# % (id,general_file))
#data_field = 'imported%s' % id
data_field = self._create_2D_scalar_field(x, y, z, id,
regular_grid=False,
indexing=indexing)
self._g('colored%s = AutoColor(%s);' % (id,data_field))
self._g('rubbersheet%s = RubberSheet(colored%s,scale=1);' % (id,id))
dar = self._ax.getp('daspect')
self._g('rubbersheet%s = Scale(rubbersheet%s,[%s %s %s]);' % \
(id,id,dar[0],dar[1],dar[2]))
contours = item.getp('contours')
if contours:
# the current item is produced by meshc or surfc and we
# should therefore add contours at the bottom:
self._add_contours(contours, id, placement='bottom')
if item.getp('wireframe'):
# wireframe mesh (as produced by mesh or meshc)
self._g('obj%s = ShowConnections(rubbersheet%s);' % (id,id))
else:
# colored surface (as produced by surf, surfc, or pcolor)
# use keyword argument shading to set the color shading mode
pcolor = item.getp('function') == 'pcolor'
if pcolor:
self._g('rubbersheet%s = colored%s;' % (id,id))
if shading == 'flat':
self._g('obj%s = FaceNormals(rubbersheet%s);' % (id,id))
elif shading == 'interp':
self._g('obj%s = Normals(rubbersheet%s);' % (id,id))
#self._g('obj%s = rubbersheet%s;' % (id,id))
else:
self._g('colored_mesh%s = Color(%s,"black");' % \
(id,data_field)) # FIXME: add sup. for other colors
self._g(('mesh_rubbersheet%s = RubberSheet(colored_mesh%s, ' +\
'scale=1);') % (id,id))
self._g(('mesh_rubbersheet%s = Scale(mesh_rubbersheet%s, ' + \
'[%s %s %s]);') % (id,id,dar[0],dar[1],dar[2]))
if pcolor:
self._g('mesh_rubbersheet%s = colored_mesh%s;' % \
(id,id))
self._g('faceted%s = ShowConnections(mesh_rubbersheet%s);' % \
(id,id))
self._g('collected = Append(collected,faceted%s);' % id)
self._g('obj%s = FaceNormals(rubbersheet%s);' % (id,id))
self._g('collected = Append(collected, obj%s);' % id)
def _add_contours(self, item, id, placement=None):
# The placement keyword can be either None or 'bottom'. The
# latter specifies that the contours should be placed at the
# bottom (as in meshc or surfc).
if DEBUG:
print "Adding contours"
x = item.getp('xdata') # grid component in x-direction
y = item.getp('ydata') # grid component in y-direction
z = item.getp('zdata') # scalar field
indexing = item.getp('indexing')
dar = self._ax.getp('daspect')
#general_file = self._create_2D_scalar_data_file(x, y, z)
#self._g('imported%s = Import("%s",format="general");' \
# % (id,general_file))
data_field = self._create_2D_scalar_field(x, y, z, id,
indexing=indexing)
self._g('colored%s = AutoColor(%s);' % (id,data_field))
filled = item.getp('filled') # draw filled contour plot if True
cvector = item.getp('cvector')
clevels = item.getp('clevels') # number of contour levels
if cvector is None:
# the contour levels are chosen automatically
self._g('cvector = NULL;')
else:
cvector = '{' + ','.join([str(c) for c in cvector]) + '}'
self._g('cvector = %s;' % cvector)
self._g('clevels = %s;' % clevels)
location = item.getp('clocation')
if location == 'surface':
# place the contours at the corresponding z level (contour3)
self._g('rubbersheet%s = RubberSheet(colored%s,scale=1);' % \
(id,id))
self._g('rubbersheet%s = Scale(rubbersheet%s, [%s %s %s]);' % \
(id,id,dar[0],dar[1],dar[2]))
self._g(('obj%s = Isosurface(rubbersheet%s, value=cvector, ' + \
'number=clevels);') % (id,id))
elif location == 'base':
if placement == 'bottom':
# place the contours at the bottom (as in meshc or surfc)
pass
else:
# standard contour plot
pass
self._g(('obj%s = Isosurface(colored%s, value=cvector, ' + \
'number=clevels);') % (id,id))
self._g('obj%s = Scale(obj%s, [%s %s %s]);' % \
(id,id,dar[0],dar[1],dar[2]))
if item.getp('clabels'):
# add labels on the contour curves
pass
linewidth = item.getp('linewidth')
if linewidth:
self._g('obj%s = Options(obj%s, "line width", %s);' % \
(id,id,linewidth))
self._g('collected = Append(collected, obj%s);' % id)
def _add_vectors(self, item):
if DEBUG:
print "Adding vectors"
# uncomment the following command if there is no support for
# automatic scaling of vectors in the current plotting package:
#item.scale_vectors()
# grid components:
x, y, z = item.getp('xdata'), item.getp('ydata'), item.getp('zdata')
# vector components:
u, v, w = item.getp('udata'), item.getp('vdata'), item.getp('wdata')
# get line specifiactions (marker='.' means no marker):
marker, color, style, width = self._get_linespecs(item)
# scale the vectors according to this variable (scale=0 should
# turn off automatic scaling):
scale = item.getp('arrowscale')
filled = item.getp('filledarrows') # draw filled arrows if True
if z is not None and w is not None:
# draw velocity vectors as arrows with components (u,v,w) at
# points (x,y,z):
pass
else:
# draw velocity vectors as arrows with components (u,v) at
# points (x,y):
pass
def _add_streams(self, item):
if DEBUG:
print "Adding streams"
# grid components:
x, y, z = item.getp('xdata'), item.getp('ydata'), item.getp('zdata')
# vector components:
u, v, w = item.getp('udata'), item.getp('vdata'), item.getp('wdata')
# starting positions for streams:
sx, sy, sz = item.getp('startx'), item.getp('starty'), item.getp('startz')
if item.getp('tubes'):
# draw stream tubes from vector data (u,v,w) at points (x,y,z)
n = item.getp('n') # no points along the circumference of the tube
scale = item.getp('tubescale')
pass
elif item.getp('ribbons'):
# draw stream ribbons from vector data (u,v,w) at points (x,y,z)
width = item.getp('ribbonwidth')
pass
else:
if z is not None and w is not None:
# draw stream lines from vector data (u,v,w) at points (x,y,z)
pass
else:
# draw stream lines from vector data (u,v) at points (x,y)
pass
pass
def _add_isosurface(self, item, id):
if DEBUG:
print "Adding a isosurface"
# grid components:
x, y, z = item.getp('xdata'), item.getp('ydata'), item.getp('zdata')
v = item.getp('vdata') # volume
c = item.getp('cdata') # pseudocolor data
isovalue = item.getp('isovalue')
indexing = item.getp('indexing')
dar = self._ax.getp('daspect')
#general_file = self._create_3D_scalar_data_file(x, y, z, v)
#self._g('data%s = Import("%s",format="general");' \
# % (id,general_file))
data_field = self._create_3D_scalar_field(x, y, z, v, id,
regular_grid=False,
indexing=indexing)
self._g('colored%s = AutoColor(%s);' % (id,data_field))
self._g('obj%s = Isosurface(colored%s, value=%s);' % \
(id,id,isovalue))
self._g('obj%s = Scale(obj%s,[%s %s %s]);' % \
(id,id,dar[0],dar[1],dar[2]))
self._g('collected = Append(collected, obj%s);' % id)
def _add_slices(self, item, id, shading='faceted'):
if DEBUG:
print "Adding slices in a volume"
# grid components:
x, y, z = item.getp('xdata'), item.getp('ydata'), item.getp('zdata')
v = item.getp('vdata') # volume
indexing = item.getp('indexing')
dar = self._ax.getp('daspect')
xmin, xmax, ymin, ymax, zmin, zmax = item.get_limits()
center = [(xmax+xmin)/2, (ymax+ymin)/2, (zmax+zmin)/2]
data_field = self._create_3D_scalar_field(x, y, z, v, id,
regular_grid=False,
indexing=indexing)
self._g('colored%s = AutoColor(%s);' % (id,data_field))
self._g('slices%s = Collect();' % id)
sx, sy, sz = item.getp('slices')
if rank(sz) == 2:
# sx, sy, and sz defines a surface
pass
else:
# sx, sy, and sz is either numbers or vectors with numbers
points = []
normals = []
sx = ravel(sx)#/dar[0]
sy = ravel(sy)#/dar[1]
sz = ravel(sz)#/dar[2]
for i in range(len(sx)):
normals.append([1,0,0])
points.append([sx[i], center[1], center[2]])
for i in range(len(sy)):
normals.append([0,1,0])
points.append([center[0], sy[i], center[2]])
for i in range(len(sz)):
normals.append([0,0,1])
points.append([center[0], center[1], sz[i]])
for i in range(len(normals)):
normal = normals[i]
point = points[i]
self._g('normal = [%s %s %s];' % \
(normal[0],normal[1],normal[2]))
self._g('point = [%s %s %s];' % (point[0],point[1],point[2]))
self._g('slice = MapToPlane(colored%s, point, normal);' % id)
if shading == 'interp':
self._g('slice = Normals(slice);')
elif shading == 'flat':
self._g('slice = FaceNormals(slice);')
else:
self._g('mesh_slice%s = Color(slice,"black");' % id)
self._g('mesh_slice%s = ShowConnections(mesh_slice%s);' % \
(id,id))
self._g('slices%s = Append(slices%s, mesh_slice%s);' % \
(id,id,id))
#self._g(
self._g('slices%s = Append(slices%s, slice);' % (id,id))
self._g('collected = Append(collected, slices%s);' % id)
def _add_contourslices(self, item):
if DEBUG:
print "Adding contours in slice planes"
# grid components:
x, y, z = item.getp('xdata'), item.getp('ydata'), item.getp('zdata')
v = item.getp('vdata') # volume
sx, sy, sz = item.getp('slices')
if rank(sz) == 2:
# sx, sy, and sz defines a surface
pass
else:
# sx, sy, and sz is either numbers or vectors with numbers
pass
cvector = item.getp('cvector')
clevels = item.getp('clevels') # number of contour levels per plane
if cvector is None:
# the contour levels are chosen automatically
#cvector =
pass
pass
def _set_figure_size(self, fig):
if DEBUG:
print "Setting figure size"
width, height = fig.getp('size')
if width and height:
# set figure width and height
self._g.root.geometry('%sx%s' % (width,height))
self._g.root.update()
else:
# use the default width and height in plotting package
pass
def figure(self, *args, **kwargs):
# Extension of BaseClass.figure:
# add a plotting package figure instance as fig._g and create a
# link to it as self._g
fig = BaseClass.figure(self, *args, **kwargs)
try:
fig._g
except:
# create plotting package figure and save figure instance
# as fig._g
name = 'Figure ' + str(fig.getp('number'))
if DEBUG:
print "creating figure %s in backend" % name
fig._g = _DXFigure(self, title=name)
self._g = fig._g # link for faster access
return fig
def _fix_latex(self, legend):
"""Remove latex syntax a la $, \, {, } etc."""
legend = legend.strip()
# General fix of latex syntax (more readable)
legend = legend.replace('**', '^')
#legend = legend.replace('*', '')
legend = legend.replace('$', '')
legend = legend.replace('{', '')
legend = legend.replace('}', '')
legend = legend.replace('\\', '')
return legend
def _replot(self):
"""Replot all axes and all plotitems in the backend."""
# NOTE: only the current figure (gcf) is redrawn.
if DEBUG:
print "Doing replot in backend"
fig = self.gcf()
# reset the plotting package instance in fig._g now if needed
fig._g.reset()
# include some useful macros:
# (look at DXLLoadMacroFile)
fig._g('//include "AutoScaleMacro.net"')
fig._g('//include "ArrangeMemberMacro.net"')
fig._g('//include "CappedIsoMacro.net"')
self._set_figure_size(fig)
#DX.exDXLBeginMacroDefinition(self._g.conn, 'macro main()')
width = self._g.width
height = self._g.height
parent = self._g.frame.winfo_id()
depth = self._g.frame.winfo_depth()
self._g(('where, size, events = SuperviseWindow("Easyviz", ' +
'display=NULL, size=[%d,%d], offset=NULL, ' +
'parent=%s, depth=%d);') % (width, height, parent, depth))
nrows, ncolumns = fig.getp('axshape')
for axnr, ax in fig.getp('axes').items():
self._ax = ax # create link for easier access later
self._axnr = axnr - 1 # same
pth = ax.getp('pth')
if pth:
# create axes in tiled position
# this is subplot(nrows,ncolumns,axnr)
pass
i = 0
self._g('collected = Collect();')
plotitems = ax.getp('plotitems')
plotitems.sort(self._cmpPlotProperties)
for item in plotitems:
item_id = str(i)
func = item.getp('function') # function that produced this item
if isinstance(item, Line):
self._add_line(item)
elif isinstance(item, Surface):
self._add_surface(item, item_id, shading=ax.getp('shading'))
elif isinstance(item, Contours):
self._add_contours(item, item_id)
elif isinstance(item, VelocityVectors):
self._add_vectors(item)
elif isinstance(item, Streams):
self._add_streams(item)
elif isinstance(item, Volume):
if func == 'isosurface':
self._add_isosurface(item, item_id)
elif func == 'slice_':
self._add_slices(item, item_id,
shading=ax.getp('shading'))
elif func == 'contourslice':
self._add_contourslices(item)
legend = self._fix_latex(item.getp('legend'))
if legend:
# add legend to plot
pass
i += 1
self._rendermode = "hardware" # hardware or software rendering
self._interactionmode = 0 # 0:rotate, 1:pan, 2:zoom
self._set_axis_props(ax)
nr = self._axnr
self._g(('object%s, cam%s, where%s = ArrangeMember(renderable, ' +
'renderMode="%s", defaultCamera=camera, ' +
'interactionMode=%d, parentSize=size, parent=where, ' +
'title="image", totalSubimages={%d}, ' +
'nHorizontal={%d}, which={%d});') % \
(nr,nr,nr,self._rendermode,self._interactionmode,
nrows*ncolumns,ncolumns,nr))
#self._g('Display(renderable, camera, where=where);')
#DX.exDXLEndMacroDefinition(self._g.conn)
if self.getp('show'):
# display plot on the screen
if DEBUG:
print "\nDumping plot data to screen\n"
debug(self)
pass
self._g.display(show=self.getp('show'))
def hardcopy(self, filename, **kwargs):
"""
Supported extensions:
'.ps' (PostScript)
'.epsf' (Encapsualted PostScript)
'.gif' (Graphics Interchange Format)
'.tiff' (Tag Image File Format)
'.miff' (Magick Image File Format)
FIXME: Add more formats like rgb, r+g+b, yuv, ...
Optional arguments:
color -- True (colors) or False (black and white).
size -- A tuple (width,height) to set the size in inches of
the image. The default is (8.5,11).
dpi -- Set the number of dots (pixels) per inch in the
hardcopy image. Use this only if you want to
explicitly set the number of dots per inch.
orientation -- 'auto' (default), 'portrait', or 'landscape'. Only
available for PostScript output.
margin -- Sets the desired margin around the image. The
default is 0.5 inch.
width -- FIXME ...
height -- FIXME ...
gamma -- Sets the gamma correction factor for the output
image. The default is 2.0. Avaliable for all output
formats.
delayed -- If True this creates an image-with-colormap. Only
available for PostScript, TIFF, and MIFF formats.
The default is False.
frame -- FIXME ...
"""
if DEBUG:
print "Hardcopy to %s" % filename
self.setp(**kwargs)
color = self.getp('color')
replot = kwargs.get('replot', True)
if replot:
self._replot()
if color:
color = 'color'
else:
color = 'gray'
size = kwargs.get('size', (8.5,11))
dpi = kwargs.get('dpi', None)
orientation = kwargs.get('orientation', 'auto')
margin = kwargs.get('margin', 0.5)
width = kwargs.get('width', None)
height = kwargs.get('height', None)
gamma = kwargs.get('gamma', 2.0)
delayed = kwargs.get('delayed', False)
basename, ext = os.path.splitext(filename)
if not ext:
ext = '.ps'
filename += ext
format = ext[1:]
options = ''
if ext in ['.ps', '.epsf']:
options += '%s page=%sx%s margin=%s orient=%s' % \
(color,size[0],size[1],margin,orientation)
if dpi is not None:
options += ' dpi=%s' % dpi
if width is not None:
options += ' width=%s' % width
if height is not None:
options += ' height=%s' % height
if ext in ['.ps', '.epsf', '.tiff', '.miff']:
if delayed:
options += ' delayed=1'
options += ' gamma=%s' % gamma
format_str = '%s %s' % (format,options)
# render image(s):
nrows, ncolumns = self.gcf().getp('axshape')
self._g('images = Collect();')
for i in range(nrows*ncolumns):
self._g('image%d = Render(object%d, cam%d);' % (i,i,i))
self._g('images = Append(images, image%d);' % i)
self._g('arranged = Arrange(images, %d);' % ncolumns)
# write to file:
self._g('WriteImage(arranged,"%s","%s");' % (basename,format_str))
# reimplement methods like clf, closefig, closefigs
def clf(self):
self._g.reset()
self._g.root.withdraw()
BaseClass.clf(self)
def save_script(self, filename):
"""
Save the DX commands used for the plot in the current figure in a
script file that can be run by the command dx -script <filename>.
Note that some aspects of the script has to be modified in order
for it to work as intended (like uncommenting the necessary macros
and removing the parent option in the SuperviseWindow.
"""
f = open(filename, 'w')
f.write(self._g.script)
f.close()
# implement colormap functions here
#def jet(self, m=None):
# """Variant of hsv."""
# pass
# Now we add the doc string from the methods in BaseClass to the
# methods that are reimplemented in this backend:
for cmd in BaseClass._matlab_like_cmds:
if not '__' in cmd and hasattr(BaseClass, cmd):
m1 = eval('BaseClass.%s' % cmd)
try:
m2 = eval('%s' % cmd)
except NameError:
pass
else:
if m1.__doc__ != m2.__doc__:
if m2.__doc__ is None:
m2.__doc__ = ""
m2.__doc__ = m1.__doc__ + m2.__doc__
plt = DXBackend() # create backend instance
use(plt, globals()) # export public namespace of plt to globals()
backend = os.path.splitext(os.path.basename(__file__))[0][:-1]
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