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

This page is now out-of-date, check example a/decimation instead.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