3dprinting/LuaLibs/CalcSlices.lua

-- CalcSlices.lua by Egaltech s.r.l. 2022/03/30
-- Calcolo percorsi di lavoro per Stampa 3d

-- Tabella per definizione modulo
local CalcSlices = {}

-- Intestazioni
require( 'EgtBase')

EgtOutLog( ' CalcSlices started', 1)

-- Dati
local AMD = require( 'AddManData')

---------------------------------------------------------------------
local function GetSliceStep()
   local nParamsGrp = EgtGetFirstNameInGroup( GDB_ID.ROOT, PARAMS_GRP) 
   local dStep = EgtGetInfo( nParamsGrp, KEY_SLICE_STEP, 'd')
   return dStep 
end

---------------------------------------------------------------------
function CalcSlices.Exec( nPartId, nStmId)

   local dTol = 0.1

   -- recuper il box della superficie 
   local b3Box = EgtGetBBoxRef( nStmId, GDB_BB.STANDARD, EgtGetGridFrame())
   if not b3Box or b3Box:isEmpty() then
      EgtOutText( 'La superficie selezionata è vuota')
      EgtPause( 1000)
      return
   end

   -- Parametri di slicing
   local dZmin = b3Box:getMin():getZ()
   local dZmax = b3Box:getMax():getZ()
   --dZmin = 1030
   --dZmax = 1031

   -- se slicing già presente lo cancello
   local nOldSliceId = EgtGetFirstNameInGroup( nPartId, SLICE_LAYER .."*") or GDB_ID.NULL
   while nOldSliceId ~= GDB_ID.NULL do
      EgtErase( nOldSliceId)
      nOldSliceId = EgtGetFirstNameInGroup( nPartId, SLICE_LAYER .."*") or GDB_ID.NULL   
   end

   -- Eseguo slicing
   local dPosZ = dZmin
   local nLayCnt = 1 
   while dPosZ < dZmax do
      -- nuovo layer
      local nLayId = EgtGroup( nPartId)
      EgtSetInfo( nLayId, KEY_SLICE_Z, dPosZ)
      EgtSetInfo( nLayId, KEY_SLICE_NBR, nLayCnt)
      
      -- calcolo intersezione
      local dDeltaZ = EgtIf( nLayCnt == 1, 0.2, 0)
      --dDeltaZ = 0
      nNewId, nPntCnt, nCrvCnt, nSrfCnt = EgtPlaneSurfTmInters( Point3d( 0, 0, dPosZ + dDeltaZ), Z_AX(), nStmId, nLayId, GDB_RT.GLOB)
      -- verifico se ricalcolare con piccolo spostamento
      local bRecalc = not nNewId or ( nSrfCnt ~= 0)
      if not bRecalc then
         for Id = nNewId + nPntCnt, nNewId + nPntCnt + nCrvCnt - 1 do
            if not EgtCurveIsClosed( Id) then
               bRecalc = true
               break
            end
         end
      end
      -- se richiesto, eseguo ricalcolo
      if bRecalc then
         local vtN = EgtSurfTmFacetNormVersor( nNewId or 0 + nPntCnt or 0 + nCrvCnt or 0, 0)
         dDeltaZ = dDeltaZ + EgtIf( vtN and vtN:getZ() < 0, 0.01, - 0.01)
         EgtEmptyGroup( nLayId)
         nNewId, nPntCnt, nCrvCnt, nSrfCnt = EgtPlaneSurfTmInters( Point3d( 0, 0, dPosZ + dDeltaZ), Z_AX(), nStmId, nLayId, GDB_RT.GLOB)
      end

      -- salvo i risultati nel layer
      if nNewId then

         -- elimino eventuali punti e superfici
         for i = 1, nPntCnt do
            EgtErase( nNewId + i - 1)
         end
         nNewId = nNewId + nPntCnt
         nPntCnt = 0
         for i = 1, nSrfCnt do
            EgtErase( nNewId + nPntCnt + nCrvCnt + i - 1)
         end
         nSrfCnt = 0

         -- correggo eventuali spostamenti in Z
         if abs( dDeltaZ) > GEO.EPS_SMALL then
            for nId = nNewId, nNewId + nPntCnt + nCrvCnt + nSrfCnt - 1 do
               EgtMove( nId, Vector3d( 0, 0, -dDeltaZ))
            end
         end

         -- verifico presenza contorni aperti
         local vOpenId = {}
         for Id = nNewId + nPntCnt, nNewId + nPntCnt + nCrvCnt - 1 do
            if not EgtCurveIsClosed( Id) then
               table.insert( vOpenId, Id)
            end
         end

         -- provo a concatenare i contorni aperti
         if #vOpenId > 1 then
            local nFirstId, nCnt = EgtCurveCompoByReorder( nLayId, vOpenId, Point3d(0,0,0), true, GDB_RT.LOC, dTol)
            if nFirstId and nCnt == 1 then
               nCrvCnt = nCrvCnt - #vOpenId + 1
               vOpenId = {}
            end
         end

         -- imposto dati ausiliari
         EgtSetName( nLayId, EgtIf( #vOpenId == 0, '', '**') .. SLICE_LAYER .. EgtNumToString( nLayCnt))
         EgtSetInfo( nLayId, 'PntCnt', nPntCnt)
         EgtSetInfo( nLayId, 'CrvCnt', nCrvCnt)
         EgtSetInfo( nLayId, 'SrfCnt', nSrfCnt)
         EgtSetColor( EgtTableFill( nNewId, nPntCnt) or {}, 'BLUE')
         EgtSetColor( EgtTableFill( nNewId + nPntCnt, nCrvCnt) or {}, 'BLACK')
         EgtSetColor( EgtTableFill( nNewId + nPntCnt + nCrvCnt, nSrfCnt) or {}, 'AQUA')

         -- creo flat region a partire dalle curve ottenute con lo slicing 
         local vCrvs = {}
         for nInd = 0, nCrvCnt - 1 do
            table.insert( vCrvs, nNewId + nPntCnt + nInd)
            EgtApproxCurve( nNewId + nPntCnt + nInd, GDB_CA.ARCS, dTol)
         end   
         local nSurfFR = EgtSurfFlatRegion( nLayId, vCrvs)
         --for nInd = 1, #vCrvs do
         --   EgtErase( vCrvs[nInd])
         --end
   
         if nSurfFR then 
            -- analizzo i singoli chunks
            local nSfrId, nSrfCnt = EgtExplodeSurf( nSurfFR)
            for nInd = 0, nSrfCnt - 1 do
               -- per ogni chunk creo un gruppo di percorsi 
               local nGrpCrv = EgtGroup( nLayId)
               EgtSetName( nGrpCrv, CONTOUR_GRP .. EgtNumToString( nInd + 1, 1))
               EgtRelocateGlob( nSfrId + nInd, nGrpCrv)
               EgtSetName( nSfrId + nInd, LAYER_SRF)
               EgtSetStatus( nSfrId + nInd, GDB_ST.OFF)
               -- estraggo i contorni della superficie
               local nCrvId, nCrvCnt = EgtExtractSurfFrChunkLoops( nSfrId + nInd, 0, nGrpCrv) 
               for nInd2 = 0, nCrvCnt - 1 do
                  EgtSetName( nCrvId + nInd2, OUTER_CRV)
                  EgtSetColor( nCrvId + nInd2, 'BLACK')
               end
            end
         else
            -- errore
            EgtSetName( nLayId, EgtIf( bAllClosed, '', '**') .. SLICE_LAYER .. EgtNumToString( nLayCnt))
         end         

      -- errore
      else
         EgtSetName( nLayId, EgtIf( bAllClosed, '', '**') .. SLICE_LAYER .. EgtNumToString( nLayCnt))
      end      

      local dStep = GetSliceStep( dPosZ, dStep)
      dPosZ = dPosZ + dStep
      nLayCnt = nLayCnt + 1 
   end
end

---------------------------------------------------------------------
return CalcSlices