History for Create a surface data cloud from a mesh you have loaded into CmGUI

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This page is now out-of-date, check example a/decimation instead.

  #mesh .exnode and .exelem files to be used
  $breast = "breast_ref4x4x6"
  #name of file to save data cloud
  $data = "breast_ref4x4x6surface"
  #data group names for the different surfaces from which data cloud is to be created 
  $dataTOP = "breast_ref4x4x6surfaceTOP"
  $dataLEFT = "breast_ref4x4x6surfaceLEFT"
  $dataRIGHT = "breast_ref4x4x6surfaceRIGHT"
  
  #read the mesh in
  gfx rea no $breast
  gfx re ele $breast
  #define a density field that helps to create a data cloud of the specified density across a surface
  gfx def field density composite 0.05
  #The following two fields will help create isosurfaces on the mesh at the external surfaces (xi1=0 or 1 and xi2=0)
  gfx def field extSurfXi2 component xi.2
  gfx def field extSurfXi1 component xi.1
  
  #create data groups to store data generated from the different surfaces (I created my data from three different surfaces on the mesh)
  gfx create dgroup $dataTOP
  gfx create dgroup $dataLEFT
  gfx create dgroup $dataRIGHT
  
  
  #group elems from the 4x4x6 ref mesh to choose their external surfaces
  gfx create egroup top_elems add_range 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24
  gfx create egroup left_elems add_range 73,74,75,76,77,78,25,26,27,28,29,30,49,50,51,52,53,54,1,2,3,4,5,6
  gfx create egroup right_elems add_range 91,92,93,94,95,96,43,44,45,46,47,48,67,68,69,70,71,72,19,20,21,22,23,24
  
  # create iso surfaces at xi2 = 0, xi 1 = 0 and xi 1 = 1 of the three different element groups. The iso-surfaces are used to create a data cloud which is stored in the surface_data_region specified by $dataTOP or $dataLEFT or $dataRIGHT
  
  gfx mod g_elem top_elems iso_surface iso_scalar extSurfXi2 iso_values 0 surface_data_coordinate_field coordinates surface_data_density_field density surface_data_region $dataTOP use_elem select_on material red selected_material default_selected render_shaded;
  
  gfx mod g_elem right_elems iso_surface iso_scalar extSurfXi1 iso_values 0.9999999 surface_data_coordinate_field coordinates surface_data_density_field density surface_data_region $dataRIGHT use_elem select_on material red selected_material default_selected render_shaded;
  
  gfx mod g_elem left_elems iso_surface iso_scalar extSurfXi1 iso_values 0 surface_data_coordinate_field coordinates surface_data_density_field density surface_data_region $dataLEFT use_elem select_on material red selected_material default_selected render_shaded;
  
  gfx cr wi
  #create a new data group
  gfx create dgroup $data
  gfx ed scene
  
  gfx modify g_element $dataTOP general clear circle_discretization 6 default_coordinate coordinates element_discretization "15*15*15" native_discretization none;
  gfx modify g_element $dataTOP lines select_on material default selected_material default_selected;
  gfx modify g_element $dataTOP data_points glyph point general size "1*1*1" centre 0,0,0 select_on material default selected_material default_selected;
  
  gfx modify g_element $dataLEFT general clear circle_discretization 6 default_coordinate coordinates element_discretization "15*15*15" native_discretization none;
  gfx modify g_element $dataLEFT lines select_on material default selected_material default_selected;
  gfx modify g_element $dataLEFT data_points glyph point general size "1*1*1" centre 0,0,0 select_on material default selected_material default_selected;
  
  gfx modify g_element $dataRIGHT general clear circle_discretization 6 default_coordinate coordinates element_discretization "15*15*15" native_discretization none;
  gfx modify g_element $dataRIGHT lines select_on material default selected_material default_selected;
  gfx modify g_element $dataRIGHT data_points glyph point general size "1*1*1" centre 0,0,0 select_on material default selected_material default_selected;
  
  #add all the data to the $data group so that all data points are in one data group.
  gfx mod dgroup $data add all
  gfx modify g_element $data general clear circle_discretization 6 default_coordinate coordinates element_discretization "15*15*15" native_discretization none;
  gfx modify g_element $data data_points glyph point general size "1*1*1" centre 0,0,0 select_on material default selected_material default_selected;
  
  #write the coordinates of the data points out into a file name stored in $data
  gfx write data group $data field coordinates $data