Mesh face selector

Compiles lists of triangles based on filter criteria for further use. Output is always an array of indices of all triangles and a numerical Boolean (0 or 1) associated to each triangle, representing whether the condition applied or didn't apply.

• Properties
• Methods
• Example

Properties

None.

Methods

Back to top

Example

The example script *\Examples\Script35_MeshFaceSelector.lua* demonstrates its use and application.

-- LUA Script for Autodesk Netfabb 2021.1
-- Copyright by Autodesk 2020
-- This script is for demonstration purposes
--==============================================================================

-- This script is for the LUA Automation module in the main module
-- The variable tray is predefined and corresponds to the current buildroom
-- This script demonstrates the use of the MeshFaceSelector

system:setloggingtooglwindow(true);

local insertMeshesIntoTable;
insertMeshesIntoTable = function (meshgroup, Outtable)
  for mesh_index    = 0, meshgroup.meshcount - 1 do
      local traymesh      = meshgroup:getmesh(mesh_index);
      table.insert(Outtable, traymesh);
  end;
  for group_index = 0, meshgroup.groupcount - 1 do
     subgroup = meshgroup:getsubgroup(group_index);
     insertMeshesIntoTable(subgroup, Outtable);
  end;
end;

function colorMeshBasedOnArray(mesh, array, threshold, colortype)
  for j=0, array.length -1 do
    if tonumber(array:get(j)) > threshold then
      if colortype == 'red' then
        mesh:colortriangle(j,0,0,255,254);
      end;

      if colortype == 'green' then
        mesh:colortriangle(j,0,255,0,254);
      end;

      if colortype == 'blue' then
        mesh:colortriangle(j,255,0,0,254);
      end;
    end;
  end;
end;

if tray == nil then
    system:log('  tray is nil!');
  else
    -- Get root meshgroup from tray
    local root = tray.root;
    local faceselector = system:createmeshfaceselector();
    -- Collect meshes in the tray
    local meshes = {};
    insertMeshesIntoTable(root, meshes);

    -- Iterate over meshes in tray
    for i, traymesh in pairs(meshes) do
      local luamesh   = traymesh.mesh;
      newMesh = luamesh:dupe();
      local matrix   = traymesh.matrix;
      newMesh:applymatrix(matrix);
      local array = system:createarray();
      newMesh:colortriangles(128,128,128,128);
      --faceselector:selectnegativeshells(newMesh, array);
      faceselector:selecttrianglesperarea(newMesh, array, 0.0,50);
      --faceselector:selectshellspervolume(newMesh, array, 0.0,6000);
      colorMeshBasedOnArray(newMesh, array, 0.5, 'red');


      newtraymesh = root:addmesh(newMesh);
      newtraymesh.name = traymesh.name .. "_SelectedTriangles";
    end;
end;                                                  

Back to top