@ pcdl : update readme tutorial blender and minor fix vtk functions.

Author: elmbeech

man/TUTORIAL_blender.md

@@ -66,25 +66,21 @@ To learn more about Blender and BVTK Node plugin, please study the official docu
 
 ## ✨ Handle ome tiff files
 
-The blender bioxel nodes plugin allows us load ome tiff files into blender.
+The blender bioxel nodes plugin allows us load single time step ome tiff files into blender.
 
-### Generate vtk files from the command line
+### Generate ome tiff files from the command line
 
 ```bash
-pcdl_make_conc_vtk output
-```
-```bash
-pcdl_make_cell_vtk output
+pcdl_make_ome_tiff output --collapse false
 ```
 
-### Generate vtk files from within python
+### Generate ome tiff files from within python
 
 ```python
 import pcdl
 
 mcdsts = pcdl.TimeSeries('output/')
-mcdsts.make_conc_vtk()
-mcdsts.make_cell_vtk()
+mcdsts.make_ome_tiff(collapse=False)
 ```
 
 ### The blender bioxel nodes plugin

pcdl/pyMCDS.py

@@ -1412,7 +1412,7 @@ def make_conc_vtk(self, visualize=True):
                 iren.Start()
 
             # free memory
-            del vfa_value
+            #del vfa_value
 
         # save vtk file
         s_vtkpathfile = self.path + '/' + s_vtkfile
@@ -2062,7 +2062,8 @@ def make_cell_vtk(self, attribute=['cell_type'], visualize=True):
                     voa_data.InsertNextValue(df_cell.loc[i, s_attribute])
 
             vug_data.GetPointData().AddArray(voa_data)
-            del voa_data
+            # free memory
+            #del voa_data
 
         # generate sphere source
         vss_data = vtk.vtkSphereSource()