/[escript]/trunk/pyvisi/py_src/carpet.py
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Contents of /trunk/pyvisi/py_src/carpet.py

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Revision 996 - (show annotations)
Mon Feb 26 03:43:13 2007 UTC (13 years, 5 months ago) by jongui
File MIME type: text/x-python
File size: 3627 byte(s)
Updated the drivers. Setting the active scalar/vector/tensor is now done in the DataCollector. i.e. 
dc = DataCollector(...)
dc.setFileName(...)
dc.setActiveScalar(...)

The use of setActiveScalar / setActiveVector / setActiveTensor have to be done after the setFileName.
1 """
2 @author: John NGUI
3 """
4
5 import vtk
6 from mapper import DataSetMapper
7 from lookuptable import LookupTable
8 from actor import Actor3D
9 from constant import Viewport, Color, Lut, WarpMode
10 from warp import Warp
11 from outline import Outline
12 from transform import Transform
13 from plane import Plane
14 from cutter import Cutter
15
16 # NOTE: DataSetMapper, Actor3D, Warp, Transform, Plane and Cutter were
17 # inherited to allow access to their public methods from the driver.
18 class Carpet(DataSetMapper, Actor3D, Warp, Transform, Plane, Cutter):
19 """
20 Class that shows a scalar field on a plane deformated along the normal.
21 """
22
23 # The SOUTH_WEST default viewport is used when there is only one viewport.
24 # This saves the user from specifying the viewport when there is only one.
25 # If no warp_mode is specified, the data will be deformated using scalar
26 # data. If no lut is specified, the color scheme will be used.
27 def __init__(self, scene, data_collector, warp_mode = WarpMode.SCALAR,
28 viewport = Viewport.SOUTH_WEST, lut = Lut.COLOR, outline = True):
29 """
30 @type scene: L{Scene <scene.Scene>} object
31 @param scene: Scene in which objects are to be rendered on
32 @type data_collector: L{DataCollector <datacollector.DataCollector>}
33 object
34 @param data_collector: Deal with source of data for visualisation
35 @param warp_mode: L{WarpMode <constant.WarpMode>} constant
36 @type warp_mode: Mode in which to deform the scalar data
37 @type viewport: L{Viewport <constant.Viewport>} constant
38 @param viewport: Viewport in which objects are to be rendered on
39 @type lut : L{Lut <constant.Lut>} constant
40 @param lut: Lookup table color scheme
41 @type outline: Boolean
42 @param outline: Places an outline around the domain surface
43 """
44
45 # NOTE: Actor3D is inherited and there are two instances declared here.
46 # As a result, when methods from Actor3D is invoked from the driver,
47 # only the methods associated with the latest instance (which in this
48 # case is the Actor3D for the carpet) can be executed. Actor3D
49 # methods associated with Outline cannot be invoked from the driver.
50 # They can only be called within here, which is why Outline must
51 # be place before the carpet as there is unlikely to be any changes
52 # made to the Outline's Actor3D.
53
54 # ----- Outline -----
55
56 if(outline == True):
57 outline = Outline(data_collector._getOutput())
58 DataSetMapper.__init__(self, outline._getOutput())
59
60 Actor3D.__init__(self, DataSetMapper._getDataSetMapper(self))
61 # Default outline color is black.
62 Actor3D.setColor(self, Color.BLACK)
63
64 # Default line width is 1.
65 Actor3D._setLineWidth(self, 1)
66 scene._addActor3D(viewport, Actor3D._getActor3D(self))
67
68 # ----- Carpet -----
69
70 # NOTE: Lookup table color mapping (color or grey scale) MUST be set
71 # before DataSetMapper. If it is done after DataSetMapper, no effect
72 # will take place.
73 if(lut == Lut.COLOR): # Colored lookup table.
74 lookup_table = LookupTable()
75 lookup_table._setTableValue()
76 elif(lut == Lut.GREY_SCALE): # Grey scaled lookup table.
77 lookup_table = LookupTable()
78 lookup_table._setLookupTableToGreyScale()
79
80 Transform.__init__(self)
81 Plane.__init__(self, Transform._getTransform(self))
82
83 Cutter.__init__(self, data_collector._getOutput(),
84 Plane._getPlane(self))
85 Warp.__init__(self, Cutter._getOutput(self), warp_mode)
86
87 DataSetMapper.__init__(self, Warp._getOutput(self),
88 lookup_table._getLookupTable())
89 DataSetMapper._setScalarRange(self, data_collector._getScalarRange())
90
91 Actor3D.__init__(self, DataSetMapper._getDataSetMapper(self))
92 scene._addActor3D(viewport, Actor3D._getActor3D(self))
93

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