def CreatePiecewiseFunction(**params):
"""Create and return a piecewise function. Optionally, parameters can be
given to assign to the piecewise function.
"""
pfunc = servermanager.piecewise_functions.PiecewiseFunction()
servermanager.Register(pfunc)
SetProperties(pfunc, **params)
return pfunc
def CreateLookupTable(**params):
"""Create and return a lookup table. Optionally, parameters can be given
to assign to the lookup table.
"""
lt = servermanager.rendering.PVLookupTable()
servermanager.Register(lt)
SetProperties(lt, **params)
return lt
def __GetLookupTableForArray(self, aArray, **kwargs):
"""
Set the lookup table for the given array and assign
the named properties.
"""
proxyName = '%d.%s.PVLookupTable' % (aArray.GetNumberOfComponents(),
aArray.GetName())
lut = servermanager.ProxyManager().GetProxy('lookup_tables', proxyName)
if not lut:
lut = servermanager.rendering.PVLookupTable(
ColorSpace="HSV", RGBPoints=[0, 0, 0, 1, 1, 1, 0, 0])
servermanager.Register(lut, registrationName=proxyName)
for arg in kwargs.keys():
if not hasattr(lut, arg):
raise AttributeError("LUT has no property %s" % (arg))
setattr(lut, arg, kwargs[arg])
return lut
def GetLookupTableForArray(arrayname, num_components, **params):
"""Used to get an existing lookuptable for a array or to create one if none
exists. Keyword arguments can be passed in to initialize the LUT if a new
one is created."""
proxyName = "%d.%s.PVLookupTable" % (int(num_components), arrayname)
lut = servermanager.ProxyManager().GetProxy("lookup_tables", proxyName)
if lut:
return lut
# No LUT exists for this array, create a new one.
# TODO: Change this to go a LookupTableManager that is shared with the GUI,
# so that the GUI and python end up create same type of LUTs. For now,
# python will create a Blue-Red LUT, unless overridden by params.
lut = servermanager.rendering.PVLookupTable(
ColorSpace="HSV", RGBPoints=[0, 0, 0, 1, 1, 1, 0, 0])
SetProperties(lut, **params)
servermanager.Register(lut, registrationName=proxyName)
return lut
def CreateScalarBar(**params):
"""Create and return a scalar bar widget. The returned widget may
be added to a render view by appending it to the view's representations
The widget must have a valid lookup table before it is added to a view.
It is possible to pass the lookup table (and other properties) as arguments
to this method:
lt = MakeBlueToRedLt(3.5, 7.5)
bar = CreateScalarBar(LookupTable=lt, Title="Velocity")
GetRenderView().Representations.append(bar)
By default the returned widget is selectable and resizable.
"""
sb = servermanager.rendering.ScalarBarWidgetRepresentation()
servermanager.Register(sb)
sb.Selectable = 1
sb.Resizable = 1
sb.Enabled = 1
sb.Title = "Scalars"
SetProperties(sb, **params)
return sb
def CreateObject(*input, **params):
"""This function creates a new proxy. For pipeline objects that accept inputs,
all non-keyword arguments are assumed to be inputs. All keyword arguments are
assumed to be property,value pairs and are passed to the new proxy."""
# Instantiate the actual object from the given module.
px = module.__dict__[key]()
# Make sure non-keyword arguments are valid
for inp in input:
if inp != None and not isinstance(inp, servermanager.Proxy):
if px.GetProperty("Input") != None:
raise RuntimeError, "Expecting a proxy as input."
else:
raise RuntimeError, "This function does not accept non-keyword arguments."
# Assign inputs
if px.GetProperty("Input") != None:
if len(input) > 0:
px.Input = input
else:
# If no input is specified, try the active pipeline object
if px.GetProperty("Input").GetRepeatable(
) and active_objects.get_selected_sources():
px.Input = active_objects.get_selected_sources()
elif active_objects.source:
px.Input = active_objects.source
else:
if len(input) > 0:
raise RuntimeError, "This function does not expect an input."
registrationName = None
for nameParam in ['registrationName', 'guiName']:
if nameParam in params:
registrationName = params[nameParam]
del params[nameParam]
# Pass all the named arguments as property,value pairs
for param in params.keys():
setattr(px, param, params[param])
try:
# Register the proxy with the proxy manager.
if registrationName:
group, name = servermanager.Register(
px, registrationName=registrationName)
else:
group, name = servermanager.Register(px)
# Register pipeline objects with the time keeper. This is used to extract time values
# from sources. NOTE: This should really be in the servermanager controller layer.
if group == "sources":
tk = servermanager.ProxyManager().GetProxiesInGroup(
"timekeeper").values()[0]
sources = tk.TimeSources
if not px in sources:
sources.append(px)
active_objects.source = px
except servermanager.MissingRegistrationInformation:
pass
return px