1 | /* |
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2 | * Additional functions used by the VTK visualiser |
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3 | * currently not used, since it is a pain to link on windows |
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4 | * |
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5 | */ |
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6 | |
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7 | #include "Python.h" |
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8 | #include "Numeric/arrayobject.h" |
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9 | |
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10 | #include "vtkPoints.h" |
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11 | #include "vtkPythonUtil.h" |
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12 | |
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13 | #include <malloc.h> |
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14 | |
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15 | static PyObject * make_vtkpoints(PyObject *self, PyObject *args); |
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16 | |
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17 | static PyMethodDef methods[] = { |
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18 | {"make_vtkpoints", make_vtkpoints, METH_VARARGS, "make vtkPoints structure"}, |
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19 | {NULL , NULL , 0 , NULL } |
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20 | }; |
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21 | |
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22 | PyMODINIT_FUNC initvtk_visualiser_ext(void){ |
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23 | (void) Py_InitModule("vtk_visualiser_ext", methods); |
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24 | import_array(); |
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25 | } |
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26 | |
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27 | /* Construct a vtkPoints object, given the number of triangles, |
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28 | * an array of vertex quantity values, an array of vertex x |
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29 | * and y coordinates and an array of triangle data. |
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30 | */ |
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31 | static PyObject * make_vtkpoints(PyObject *self, PyObject * args){ |
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32 | int i, j; |
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33 | int n_tri; |
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34 | int n_vert; |
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35 | double scale; |
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36 | PyArrayObject * qty_values; |
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37 | PyArrayObject * vertex_values; |
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38 | PyArrayObject * triangles; |
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39 | double * qty_index; |
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40 | vtkPoints * grid; |
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41 | int dims[1]; |
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42 | if(!PyArg_ParseTuple(args, "iidOOO", &n_tri, &n_vert, &scale, &qty_values, &vertex_values, &triangles)) |
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43 | return NULL; |
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44 | |
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45 | dims[0] = n_vert; |
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46 | qty_index = (double*)malloc(n_vert * sizeof(double)); |
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47 | if(qty_index == NULL) |
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48 | return NULL; |
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49 | |
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50 | for(i = 0 ; i < n_tri ; i++) |
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51 | for(j = 0 ; j < 3 ; j++) |
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52 | qty_index[*(int*)((triangles->data) + i*(triangles->strides[0]) + j*(triangles->strides[1]))] = |
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53 | *(double*)((qty_values->data) + i*(qty_values->strides[0]) + j*(qty_values->strides[1])) * scale; |
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54 | |
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55 | grid = vtkPoints::New(); |
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56 | for(i = 0 ; i < n_vert ; i++) |
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57 | grid->InsertNextPoint(*(double*)((vertex_values->data) + i*(vertex_values->strides[0])), |
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58 | *(double*)((vertex_values->data) + i*(vertex_values->strides[0]) + (vertex_values->strides[1])), |
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59 | qty_index[i]); |
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60 | free(qty_index); |
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61 | return Py_BuildValue("O", vtkPythonGetObjectFromPointer(grid)); |
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62 | } |
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