| 1 | from Numeric import zeros, Float |
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| 2 | from Scientific.IO.NetCDF import NetCDFFile |
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| 3 | from Tkinter import Button, E, W |
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| 4 | from visualiser import Visualiser |
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| 5 | from vtk import vtkCellArray, vtkPoints, vtkPolyData |
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| 6 | |
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| 7 | class OfflineVisualiser(Visualiser): |
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| 8 | """A VTK-powered offline visualiser which runs in its own thread. |
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| 9 | """ |
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| 10 | def __init__(self, source): |
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| 11 | """The source parameter is assumed to be a NetCDF sww file. |
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| 12 | """ |
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| 13 | Visualiser.__init__(self, source) |
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| 14 | |
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| 15 | self.frame_number = 0 |
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| 16 | fin = NetCDFFile(self.source, 'r') |
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| 17 | self.max_frame_number = fin.variables['time'].shape[0] - 1 |
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| 18 | fin.close() |
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| 19 | |
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| 20 | def setup_grid(self): |
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| 21 | fin = NetCDFFile(self.source, 'r') |
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| 22 | self.vtk_cells = vtkCellArray() |
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| 23 | N_tri = fin.variables['volumes'].shape[0] |
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| 24 | for v in range(N_tri): |
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| 25 | self.vtk_cells.InsertNextCell(3) |
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| 26 | for i in range(3): |
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| 27 | self.vtk_cells.InsertCellPoint(fin.variables['volumes'][v][i]) |
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| 28 | fin.close() |
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| 29 | |
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| 30 | def update_height_quantity(self, quantityName, dynamic=True): |
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| 31 | fin = NetCDFFile(self.source, 'r') |
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| 32 | if(fin.variables.has_key(quantityName)): |
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| 33 | points = vtkPoints() |
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| 34 | if dynamic: |
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| 35 | N_vert = fin.variables[quantityName].shape[1] |
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| 36 | else: |
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| 37 | N_vert = len(fin.variables[quantityName]) |
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| 38 | x = fin.variables['x'] |
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| 39 | y = fin.variables['y'] |
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| 40 | q = fin.variables[quantityName] |
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| 41 | scale = self.height_zScales[quantityName] |
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| 42 | off = self.height_zScales[quantityName] |
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| 43 | if dynamic is True: |
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| 44 | for v in range(N_vert): |
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| 45 | points.InsertNextPoint(x[v], |
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| 46 | y[v], |
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| 47 | q[self.frame_number][v] \ |
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| 48 | * scale \ |
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| 49 | + off) |
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| 50 | else: |
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| 51 | for v in range(N_vert): |
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| 52 | points.InsertNextPoint(x[v], |
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| 53 | y[v], |
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| 54 | q[v] \ |
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| 55 | * scale \ |
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| 56 | + off) |
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| 57 | polydata = self.vtk_polyData[quantityName] = vtkPolyData() |
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| 58 | polydata.SetPoints(points) |
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| 59 | polydata.SetPolys(self.vtk_cells) |
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| 60 | else: |
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| 61 | self.height_quantities.remove(quantityName) |
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| 62 | fin.close() |
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| 63 | |
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| 64 | def setup_gui(self): |
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| 65 | Visualiser.setup_gui(self) |
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| 66 | self.tk_renderWidget.grid(row=0, column=0, columnspan=6) |
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| 67 | self.tk_quit.grid(row=2, column=0, columnspan=6, sticky=W+E) |
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| 68 | self.tk_restart = Button(self.tk_root, text="<<<", command=self.restart) |
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| 69 | self.tk_restart.grid(row=1, column=0, sticky=W+E) |
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| 70 | self.tk_back10 = Button(self.tk_root, text="<<", command=self.back10) |
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| 71 | self.tk_back10.grid(row=1, column=1, sticky=W+E) |
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| 72 | self.tk_back = Button(self.tk_root, text="<", command=self.back) |
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| 73 | self.tk_back.grid(row=1, column=2, sticky=W+E) |
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| 74 | self.tk_pauseResume = Button(self.tk_root, text="Pause", command=self.pauseResume) |
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| 75 | self.tk_pauseResume.grid(row=1, column=3, sticky=W+E) |
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| 76 | self.tk_forward = Button(self.tk_root, text=">", command=self.forward) |
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| 77 | self.tk_forward.grid(row=1, column=4, sticky=W+E) |
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| 78 | self.tk_forward10 = Button(self.tk_root, text=">>", command=self.forward10) |
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| 79 | self.tk_forward10.grid(row=1, column=5, sticky=W+E) |
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| 80 | |
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| 81 | def restart(self): |
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| 82 | self.frame_number = 0 |
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| 83 | self.redraw_quantities(True) |
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| 84 | |
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| 85 | def back10(self): |
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| 86 | if self.frame_number - 10 >= 0: |
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| 87 | self.frame_number -= 10 |
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| 88 | else: |
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| 89 | self.frame_number = 0 |
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| 90 | self.redraw_quantities(True) |
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| 91 | |
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| 92 | def back(self): |
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| 93 | if self.frame_number > 0: |
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| 94 | self.frame_number -= 1 |
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| 95 | self.redraw_quantities(True) |
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| 96 | |
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| 97 | def pauseResume(self): |
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| 98 | print "Pause/Resume" |
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| 99 | |
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| 100 | def forward(self): |
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| 101 | if self.frame_number < self.max_frame_number: |
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| 102 | self.frame_number += 1 |
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| 103 | self.redraw_quantities(True) |
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| 104 | |
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| 105 | def forward10(self): |
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| 106 | if self.frame_number + 10 <= self.max_frame_number: |
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| 107 | self.frame_number += 10 |
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| 108 | else: |
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| 109 | self.frame_number = self.max_frame_number |
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| 110 | self.redraw_quantities(True) |
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