-- RunCalcSolids.lua by Egaltech s.r.l. 2022/11/02
-- Calcolo percorsi di lavoro per Stampa 3d

-- Tabella per definizione modulo
local RunCalcSolids = {}

-- Intestazioni
require( 'EgtBase')

EgtOutLog( ' RunCalcSolids started', 1)

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

--------------------------------------------------------------------
local s_dTol = 0.1
local s_nSimplifiedSection = 0
local s_dMultiPlanarH = 0

---------------------------------------------------------------------
local function GetLayerParamsForSolidCalc( nPartId)
   local LayerParams = {}
   LayerParams.bSpiralVase = EgtGetInfo( nPartId, KEY_SPIRAL_VASE, 'b') or false
   LayerParams.dLayHeight = EgtGetInfo( nPartId, KEY_SLICE_STEP, 'd')
   LayerParams.vtSlicing = EgtGetInfo( nPartId, KEY_SLICE_DIR, 'v')
   LayerParams.dStrand = EgtGetInfo( nPartId, KEY_STRAND, 'd')
   return LayerParams
end

---------------------------------------------------------------------
local function CalcSectionParams( dStrand, dH)
   local dBevelX = 0
   local dBevelY = 0
   if s_nSimplifiedSection == 0 then
      -- sezione ottagonale
      dBevelX = dStrand / 10
      dBevelY = dH / 6
   end
   return dBevelX, dBevelY
end

----------------------------------------------------------------------
local function CreateStandardSolid( nCrvId, nSolidGrp, dH, dStrand)
   
   local dBevelX, dBevelY = CalcSectionParams( dStrand, dH)
   local nSrfId = EgtSurfTmRectSwept( nSolidGrp, dStrand, dH, dBevelX, dBevelY, nCrvId, GDB_RSCT.BEVEL, s_dTol)
   return nSrfId
end

---------------------------------------------------------------------
local function CreateSection( ptS, vtDir, dStrand, dH, vtSlicing, nSolidGrp)

   local dBevelX, dBevelY = CalcSectionParams( dStrand, dH)
   local ptA = ptS - dH * vtSlicing  + ( 0.5 * dStrand - dBevelX) * vtDir
   local ptB = ptA + dBevelY * vtSlicing + dBevelX * vtDir
   local ptC = ptB + ( dH - 2 * dBevelY) * vtSlicing
   local ptD = ptA + dH * vtSlicing
   local ptE = ptD - ( dStrand - 2 * dBevelX) * vtDir
   local ptF = ptC - dStrand * vtDir
   local ptG = ptB - dStrand * vtDir
   local ptH = ptA - ( dStrand - 2 * dBevelX) * vtDir
   
   local nId = EgtCurveCompoFromPoints( nSolidGrp, {ptA, ptB, ptC, ptD, ptE, ptF, ptG, ptH, ptA}, GDB_RT.GLOB)
   EgtInvertCurve( nId)
   
   return nId
end

------------------------------------------------------------------------------
local function CreateSpiralVaseCap( nSectId, vtDir, nSolidGrp)
   
   local vPt = {}
   local nLast = EgtIf( s_nSimplifiedSection == 1, 3, 7)
   for i = 0, nLast do
      vPt[i + 1] = EgtUP( nSectId, i, GDB_ID.ROOT)
   end
   
   local vCrvs = {}
   -- calcolo gli archi che definiscono la superficie laterale
   if s_nSimplifiedSection == 1 then
      -- sezione quadrata
      vCrvs[1] = EgtArc2PV( nSolidGrp, vPt[1], vPt[2], vtDir, GDB_RT.GLOB)
      vCrvs[2] = EgtArc2PV( nSolidGrp, vPt[4], vPt[3], vtDir, GDB_RT.GLOB)
   else
      -- sezione ottagonale
      vCrvs[1] = EgtArc2PV( nSolidGrp, vPt[1], vPt[2], vtDir, GDB_RT.GLOB)
      vCrvs[2] = EgtArc2PV( nSolidGrp, vPt[8], vPt[3], vtDir, GDB_RT.GLOB)
      vCrvs[3] = EgtArc2PV( nSolidGrp, vPt[7], vPt[4], vtDir, GDB_RT.GLOB)
      vCrvs[4] = EgtArc2PV( nSolidGrp, vPt[6], vPt[5], vtDir, GDB_RT.GLOB)
   end
   -- creo le rigate
   local vSurfs = {}
   for i = 1, #vCrvs - 1 do
      vSurfs[i] = EgtSurfTmRuled( nSolidGrp, vCrvs[i], vCrvs[i+1], GDB_RUL.ISOPAR, s_dTol)
   end
   -- calcolo le superfici top e bottom del cap
   local nCrvBottom = EgtCurveCompo( nSolidGrp, {vCrvs[1]}, false, GDB_RT.GLOB)
   EgtCloseCurveCompo( nCrvBottom)
   local nSurfBottom = EgtSurfTmByRegion( nSolidGrp, nCrvBottom, s_dTol)
   local nCrvTop = EgtCurveCompo( nSolidGrp, {vCrvs[#vCrvs]}, false, GDB_RT.GLOB)
   EgtCloseCurveCompo( nCrvTop)
   local nSurfTop = EgtSurfTmByRegion( nSolidGrp, nCrvTop, s_dTol)
   table.insert( vSurfs, nSurfTop)
   table.insert( vSurfs, nSurfBottom)
   
   local nCapSrf = EgtSurfTmByTriangles( nSolidGrp, vSurfs)
   
   -- cancello curve di costruzione
   for i = 1, #vCrvs do
      EgtErase( vCrvs[i])
   end
   EgtErase( nCrvTop)
   EgtErase( nCrvBottom)
   
   return nCapSrf
end

-------------------------------------------------------------------------------
local function CreateSpiralVaseSolid( nCrvId, nSolidGrp, vtSlicing, dH, dStrand)
   
   -- gruppo temporaneo per conti 
   local nGrpTmp = EgtGroup( nSolidGrp, Frame3d( ORIG(), vtSlicing, GDB_RT.GLOB))
   
   -- accorcio leggermente la curva per evitare problemi di inconsistent orientation nel solido
   local dLen = EgtCurveLength( nCrvId)
   EgtTrimCurveEndAtLen( nCrvId, dLen - 20 * GEO.EPS_SMALL)
   
   local ptS = EgtSP( nCrvId, GDB_ID.ROOT)
   local vtS = EgtSV( nCrvId, GDB_ID.ROOT)
   local ptE = EgtEP( nCrvId, GDB_ID.ROOT)
   local vtE = EgtEV( nCrvId, GDB_ID.ROOT)
   local dDelta = ( ptE - ptS) * vtSlicing
   -- se non è vero spiral vase, chiamo funzione standard
   if dDelta < GEO.EPS_SMALL then
      EgtErase( nGrpTmp)
      return CreateStandardSolid( nCrvId, nSolidGrp, dH, dStrand)
   end
   
   -- appiattisco la curva
   local nCrvCopy = EgtCopyGlob( nCrvId, nGrpTmp)
   EgtModifyCurveExtrusion( nCrvCopy, vtSlicing, GDB_RT.GLOB)
   EgtProjectCurveOnPlane( nCrvCopy, ptS, vtSlicing, GDB_RT.GLOB)
   EgtMergeCurvesInCurveCompo( nCrvCopy)
   EgtChangeClosedCurveStartPoint( nCrvCopy, ptS, GDB_RT.GLOB)
  
   -- calcolo la sezione iniziale
   local vtDir = EgtSV( nCrvCopy, GDB_ID.ROOT)
   vtDir:rotate( vtSlicing, 90)
   local nSectId = CreateSection( ptS, vtDir, dStrand, dH, vtSlicing, nGrpTmp)
   -- creo la sezione finale
   local vtDir2 = EgtEV( nCrvCopy, GDB_ID.ROOT)
   vtDir2:rotate( vtSlicing, 90)
   local nSectE = CreateSection( ptE, vtDir2, dStrand, dH, vtSlicing, nGrpTmp)
   
   -- creo il solido aperto (tubo)
   local vCrvs = {}
   local _, dParE = EgtCurveDomain( nSectId)
   for i = 0, dParE do
      local ptRef = EgtUP( nSectId, i, GDB_ID.ROOT)
      local dOffs = ( ptS - ptRef) * vtDir
      vCrvs[i+1] = EgtOffsetCurveAdv( nCrvCopy, dOffs)
      if not vCrvs[i+1] or vCrvs[i+1] == GDB_ID.NULL then
         EgtErase( nGrpTmp)
         return nil
      end
      local dMove = ( ptRef - ptS) * vtSlicing
      EgtMove( vCrvs[i+1], vtSlicing * dMove, GDB_RT.GLOB)
      EgtSpiralizeCurveAlongExtrusion( vCrvs[i+1], dDelta)

      -- modifico la curva per congiungerla ai caps
      EgtApproxCurve( vCrvs[i+1], GDB_CA.LINES, s_dTol)
      EgtModifyCurveStartPoint( vCrvs[i+1], ptRef, GDB_RT.GLOB)
      local ptRefEnd = EgtUP( nSectE, i, GDB_ID.ROOT)
      local _, _, dParMinDist = EgtPointCurveDist( ptRefEnd, vCrvs[i+1], GDB_ID.ROOT)
      local _, dParE = EgtCurveDomain( vCrvs[i+1])
      if abs( dParE - dParMinDist) > GEO.EPS_SMALL and dParMinDist > 0.5 * dParE then
         EgtTrimCurveEndAtParam( vCrvs[i+1], dParMinDist)
      end
      EgtModifyCurveEndPoint( vCrvs[i+1], ptRefEnd, GDB_RT.GLOB)
   end
   
   local vSurfs = {}
   for i = 1, #vCrvs - 1 do
      vSurfs[i] = EgtSurfTmRuled( nGrpTmp, vCrvs[i], vCrvs[i+1], GDB_RUL.MINDIST, s_dTol)
      if not vSurfs[i] or vSurfs[i] == GDB_ID.NULL then
         EgtErase( nGrpTmp)
         return nil
      end
   end

   local nSrfId = EgtSurfTmByTriangles( nSolidGrp, vSurfs)
  
   -- creazione del mezzo disco iniziale
   local nCap1 = CreateSpiralVaseCap( nSectId, - vtS, nSolidGrp)
   -- creazione del mezzo disco finale
   local nCap2 = CreateSpiralVaseCap( nSectE, vtE, nSolidGrp)
   EgtInvertSurf( nCap2)

   -- cancello le curve usate per la costruzione
   EgtErase( nGrpTmp)

   return EgtSurfTmByTriangles( nSolidGrp, { nSrfId, nCap1, nCap2})
end

--------------------------------------------------------------------------------------
local function CreateSolid( nCrvId, nSolidGrp, LayerParams, dH, dStrand)
   if LayerParams.bSpiralVase then
      return CreateSpiralVaseSolid( nCrvId, nSolidGrp, LayerParams.vtSlicing, dH, dStrand)
   else
      return CreateStandardSolid( nCrvId, nSolidGrp, dH, dStrand)
   end
end

---------------------------------------------------------------------
local function CreateDirectionArrow( nCrvId, nSolidGrp, vtSlicing, dStrand, nLayer)
   
   local ptS = EgtSP( nCrvId, GDB_RT.GLOB)
   local vtS = EgtSV( nCrvId, GDB_RT.GLOB)
   local dCrvLen = EgtCurveLength( nCrvId)
   if dCrvLen > 2 * dStrand then
      local dPar = EgtCurveParamAtLength( nCrvId, 4/5 * dStrand)
      ptS = EgtUP( nCrvId, dPar, GDB_RT.GLOB)
      vtS = EgtUV( nCrvId, dPar, -1, GDB_RT.GLOB)
   end
      
   local vt2 = Vector3d( vtS)
   vt2:rotate( vtSlicing, 90)
   local dLen = 4/5 * dStrand
   local pt1 = ptS + 0.5 * dLen * vt2
   local pt2 = ptS - 0.5 * dLen * vt2
   local pt3 = ptS + vtS * dLen
   local nCompo = EgtCurveCompoFromPoints( nSolidGrp, { pt1, pt2, pt3, pt1}, GDB_RT.GLOB)
   EgtMove( nCompo, 100 * GEO.EPS_SMALL * vtSlicing, GDB_RT.GLOB)
   local nSrf = EgtSurfFlatRegion( nSolidGrp, { nCompo})
   EgtErase( nCompo)
   EgtSetColor( nSrf, RED())
   EgtSetInfo( nSrf, KEY_SLICE_NBR, nLayer)
   EgtSetStatus( nSrf, GDB_ST.OFF)
   EgtSetMode( nSrf, GDB_MD.HIDDEN)
   EgtSetName( nSrf, DIR_ARROW)
   
end

---------------------------------------------------------------------
local function CreateRecursiveSolid( nCrvId, vSurfs, nSolidGrp, LayerParams, dH, dStrand)

   -- tento la creazione del solido
   local nSurf = CreateSolid( nCrvId, nSolidGrp, LayerParams, dH, dStrand - 50 * GEO.EPS_SMALL)
   if nSurf then
      EgtErase( nCrvId)
      table.insert( vSurfs, nSurf)
      return true
   else
      -- se curva singola esco perchè non è possibile spezzare ulteriormente
      local _, dParE = EgtCurveDomain( nCrvId)
      if abs( dParE - 1) < GEO.EPS_SMALL then
         EgtErase( nCrvId)
         return false
      end
      -- se non si tratta di curva singola, spezzo a metà e tento sulle due sottocurve
      local dParSplit = floor( dParE / 2 + 0.5)
      local nCrvSplit = EgtSplitCurveAtParam( nCrvId, dParSplit)
      if not nCrvSplit then
         -- errore nello split
         EgtErase( nCrvId)
         return false
      end
      local bOk = CreateRecursiveSolid( nCrvId, vSurfs, nSolidGrp, LayerParams, dH, dStrand)
      bOk = bOk and CreateRecursiveSolid( nCrvSplit, vSurfs, nSolidGrp, LayerParams, dH, dStrand)
      return bOk
   end
end

---------------------------------------------------------------------
local function CreateSolidFromCurve( nCrvId, nSolidGrp, LayerParams, nLayer, dLayerH)
  
   local nType = EgtGetInfo( nCrvId, KEY_TYPE, 'i')
   if nType == TYPE.WIPE then return true end 
   -- scelta del colore
   local Color = EgtStdColor( 'GRAY')
   if nType == TYPE.OUTER_SHELL or nType == TYPE.EXTRA_OUTER_SHELL then 
      Color = EgtStdColor( 'TEAL')
   elseif nType == TYPE.INNER_SHELL or nType == TYPE.EXTRA_SHELL then
      Color = EgtStdColor( 'ORANGE')
   elseif nType == TYPE.LINK then
      Color = EgtStdColor( 'GRAY')
   elseif nType == TYPE.INFILL then
      Color = EgtStdColor( 'YELLOW')
   elseif nType == TYPE.COASTING then
      Color = EgtStdColor( 'BLUE')
   elseif nType == TYPE.RIB then
      Color = EgtStdColor( 'OLIVE')
   elseif nType == TYPE.AUX_SOLID then
      Color = EgtStdColor( 'AQUA')
   end
   
   -- parametri della passata
   local dStrand = EgtGetInfo( nCrvId, KEY_CRV_STRAND, 'd') or LayerParams.dStrand
   local dH = dLayerH or LayerParams.dLayHeight
   
   local nCopyId = EgtCopyGlob( nCrvId, nSolidGrp)
   local nId = GDB_ID.NULL
   local nParts = 1
   local LEN_REF = 100
   local bZigZagInfill = EgtGetInfo( nCopyId, KEY_ZIG_ZAG_INFILL, 'b') or false
   if bZigZagInfill then
      nId, nParts = EgtSplitCurveAtCorners( nCopyId, 80)
   else
      local dLen = EgtCurveLength( nCrvId)
      if dLen > LEN_REF and nType ~= TYPE.LINK and nType ~= TYPE.COASTING then
         nParts = EgtClamp( floor( dLen / LEN_REF), 1, 10)
      end
      nId = EgtSplitCurve( nCopyId, nParts)
   end
   
   -- freccia direzionale
   local sName = EgtGetName( nCrvId)
   if nType ~= TYPE.COASTING and nType ~= TYPE.LINK and sName ~= LEAD_IN_CRV and sName ~= LEAD_OUT_CRV and sName ~= LINK_CRV then
      CreateDirectionArrow( nCrvId, nSolidGrp, LayerParams.vtSlicing, dStrand, nLayer)
   end
   
   if nId == GDB_ID.NULL then return false end
   local bOk = true
   for nInd = 0, nParts - 1 do
      local nGuideId = nId + nInd
      local nSrfId = CreateSolid( nGuideId, nSolidGrp, LayerParams, dH, dStrand - 5 * GEO.EPS_SMALL)
      if not nSrfId then
         EgtOutLog( 'Warning : CreateSolid failed '.. '(layer '..tostring( nLayer)..', curve '..tostring( nCrvId)..')')
         -- ritento con strand più piccolo
         nSrfId = CreateSolid( nGuideId, nSolidGrp, LayerParams, dH, dStrand - 50 * GEO.EPS_SMALL)
         
         if not nSrfId then
            EgtOutLog( 'Warning : CreateSolid_1 failed '.. '(layer '..tostring( nLayer)..', curve '..tostring( nCrvId)..')')
            -- se non ultima, provo a spostare l'estremità finale
            if nInd < nParts - 1 then
               local nCopyId = EgtCopy( nGuideId + 1, nGuideId, GDB_IN.AFTER)
               if nCopyId then
                  local LEN_TRIM = 10
                  local bOk1 = EgtTrimCurveEndAtLen( nCopyId, LEN_TRIM)
                  local bOk2 = EgtAddCurveCompoCurve( nGuideId, nCopyId)
                  local bOk3 = EgtTrimCurveStartAtLen( nGuideId + 1, LEN_TRIM)
                  nSrfId = CreateSolid( nGuideId, nSolidGrp, LayerParams, dH, dStrand - 5 * GEO.EPS_SMALL)
                  if not nSrfId then
                     nSrfId = CreateSolid( nGuideId, nSolidGrp, LayerParams, dH, dStrand - 50 * GEO.EPS_SMALL)
                  end
               end
            end
         end
         
         -- ritento spezzando la curva in modo ricorsivo fino ad inidividuare delle sottocurve su cui è possibile calcolare il solido
         if not nSrfId then
            EgtOutLog( 'Warning : CreateSolid_2 failed')
            local nGrp = EgtGroup( nSolidGrp, Frame3d( ORIG(), LayerParams.vtSlicing), GDB_RT.GLOB)
            EgtRelocateGlob( nGuideId, nGrp)
            EgtApproxCurve( nGuideId, GDB_CA.LINES, 100 * GEO.EPS_SMALL)
            EgtRelocateGlob( nGuideId, nSolidGrp)

            local vSurfs = {}
            local bOk = CreateRecursiveSolid( nGuideId, vSurfs, nSolidGrp, LayerParams, dH, dStrand)
            if #vSurfs > 0 then
               nSrfId = EgtSurfTmByTriangles( nSolidGrp, vSurfs)
            end
            if not nSrfId or bOk == false then
               EgtOutLog( 'Warning : CreateSolid_3 failed')
            end
            EgtErase( nGrp)
         end
      end

      if nSrfId then
         EgtSetColor( nSrfId, Color)
         EgtSetInfo( nSrfId, KEY_TYPE, nType)
         EgtSetInfo( nSrfId, KEY_SLICE_NBR, nLayer)
      else
         bOk = false
         EgtOutLog( 'Warning : CreateSolid_Sewing failed')
      end
      EgtErase( nGuideId)
   end 

   return bOk
end

--------------------------------------------------------------------
------------------------- MULTIPLANAR ------------------------------
--------------------------------------------------------------------
local function CreateMultiPlanarSolids( vIds, nSolidGrpId, LayerParams, nLayerId)
   
   -- creo solidi standard con spessore massimo ammesso ( tranne nel primo layer che viene fatto ad altezza costante)
   local nSliceNbr = EgtGetInfo( nLayerId, KEY_SLICE_NBR, 'i')
   local dH = EgtIf( nSliceNbr == 1, LayerParams.dLayHeight, s_dMultiPlanarH)
   for i = 1, #vIds do
      CreateSolidFromCurve( vIds[i], nSolidGrpId, LayerParams, nSliceNbr, dH)
   end
   
   -- deformo i solidi per rispettare l'altezza reale della passata
   if nSliceNbr > 1 then
      local ptSlicing = EgtGetInfo( nLayerId, KEY_SLICE_POS, 'p') + LayerParams.vtSlicing * LayerParams.dLayHeight
      local nPrevLayerId = EgtGetPrev( nLayerId)
      local vtSlicingPrev = EgtGetInfo( nPrevLayerId, KEY_SLICE_DIR, 'v') 
      local ptSlicingPrev = EgtGetInfo( nPrevLayerId, KEY_SLICE_POS, 'p') + vtSlicingPrev * LayerParams.dLayHeight
      
      local vSolids = EgtGetAllInGroup( nSolidGrpId)
      for i = 1, #vSolids do
         local nVertexCnt = EgtSurfTmVertexCount( vSolids[i])
         for j = 0, nVertexCnt - 1 do
            local ptVertex = EgtSurfTmGetVertex( vSolids[i], j, GDB_RT.GLOB)
            -- distanza dal piano di slicing corrente e precedente lungo vtSlicing
            local dDistCurr = abs( ( ptVertex - ptSlicing) * LayerParams.vtSlicing)
            local dDistPrev = ( ptVertex - ptSlicingPrev) * vtSlicingPrev / ( vtSlicingPrev * LayerParams.vtSlicing)
            -- calcolo la nuova posizione sapendo che l'altezza dello strand passa da s_dMultiPlanarH a dNewH
            local dNewH = dDistCurr + dDistPrev
            local dDelta = dDistCurr - dDistCurr * dNewH / s_dMultiPlanarH
            local ptNew = ptVertex + dDelta * LayerParams.vtSlicing
            EgtSurfTmMoveVertex( vSolids[i], j, ptNew, GDB_RT.GLOB, ( j == nVertexCnt - 1))
         end
      end
   end
end

---------------------------------------------------------------------
local function CreatePartialSpiralVaseMultiPlanarSolids( vIds, nSolidGrpId, LayerParams, nLayerId)
   
   -- 1) le prima curve sono solidi multiplanari standard
   for i = 1, #vIds - 1 do
      CreateMultiPlanarSolids( { vIds[i]}, nSolidGrpId, LayerParams, nLayerId)
   end
   
   -- 2) l'ultima è il tratto che si alza fino al layer successivo
   local dStrand = EgtGetInfo( vIds[#vIds], KEY_CRV_STRAND, 'd') or LayerParams.dStrand
   -- gruppo temporaneo per conti
   local nGrpTmp = EgtGroup( nSolidGrpId, Frame3d( ORIG(), LayerParams.vtSlicing, GDB_RT.GLOB))

   -- appiattisco la curva ( proiezione obliqua sul piano corrente lungo vtSlicing del piano successivo)
   local nNextLayerId = EgtGetNext( nLayerId)
   local vtSlicingNext = EgtGetInfo( nNextLayerId, KEY_SLICE_DIR, 'v')
   local ptSlicing = EgtGetInfo( nLayerId, KEY_SLICE_POS, 'p') + LayerParams.dLayHeight * LayerParams.vtSlicing
   local nProjCrv = EgtCopyGlob( vIds[#vIds], nGrpTmp)
   local _, dE = EgtCurveDomain( nProjCrv)
   for dU = 0, dE do
      local ptCurr = EgtUP( nProjCrv, dU, GDB_ID.ROOT)
      local dDist = ( ptCurr - ptSlicing) * LayerParams.vtSlicing / ( vtSlicingNext * LayerParams.vtSlicing)
      EgtModifyCurveCompoJoint( nProjCrv, dU, ptCurr - dDist * vtSlicingNext, GDB_RT.GLOB)
   end
  
   -- calcolo la sezione iniziale
   local ptS = EgtSP( vIds[#vIds], GDB_ID.ROOT)
   local ptE = EgtEP( vIds[#vIds], GDB_ID.ROOT)
   local vtDir = EgtSV( nProjCrv, GDB_ID.ROOT)
   vtDir:rotate( LayerParams.vtSlicing, 90)
   local nSectId = CreateSection( ptS, vtDir, dStrand, s_dMultiPlanarH, LayerParams.vtSlicing, nGrpTmp)
   -- creo la sezione finale
   local vtDir2 = EgtEV( nProjCrv, GDB_ID.ROOT)
   vtDir2:rotate( LayerParams.vtSlicing, 90)
   local nSectE = CreateSection( ptE, vtDir2, dStrand, s_dMultiPlanarH, LayerParams.vtSlicing, nGrpTmp)
   
   -- creo il solido aperto ( tubo)
   local dMaxDist = ( EgtEP( vIds[#vIds], GDB_ID.ROOT) - ptSlicing) * LayerParams.vtSlicing / ( vtSlicingNext * LayerParams.vtSlicing)
   local vCrvs = {}
   local _, dParE = EgtCurveDomain( nSectId)
   for i = 0, dParE do
      local ptRef = EgtUP( nSectId, i, GDB_ID.ROOT)
      local dOffs = ( ptS - ptRef) * vtDir
      vCrvs[i+1] = EgtOffsetCurveAdv( nProjCrv, dOffs)
      if not vCrvs[i+1] or vCrvs[i+1] == GDB_ID.NULL then
         EgtErase( nGrpTmp)
         return false
      end

      -- proiezione obliqua "graduale"
      EgtApproxCurve( vCrvs[i+1], GDB_CA.SPECIAL_LINES, 0.01)
      local _, dE = EgtCurveDomain( vCrvs[i+1])
      local dLen = EgtCurveLength( vCrvs[i+1])
      local vDelta = {}
      for dU = 0, dE do
         local dCurrLen = EgtCurveLengthAtParam( vCrvs[i+1], dU) 
         vDelta[dU] = dMaxDist * dCurrLen / dLen
      end
      for dU = 0, dE do
         local ptCurr = EgtUP( vCrvs[i+1], dU, GDB_ID.ROOT)
         EgtModifyCurveCompoJoint( vCrvs[i+1], dU, ptCurr + vDelta[dU] * vtSlicingNext, GDB_RT.GLOB)
      end

      local dMove = ( ptRef - ptS) * LayerParams.vtSlicing
      EgtMove( vCrvs[i+1], LayerParams.vtSlicing * dMove, GDB_RT.GLOB)
   end
   local vSurfs = {}
   for i = 1, #vCrvs - 1 do
      vSurfs[i] = EgtSurfTmRuled( nGrpTmp, vCrvs[i], vCrvs[i+1], GDB_RUL.MINDIST, s_dTol)
      if not vSurfs[i] or vSurfs[i] == GDB_ID.NULL then
         EgtErase( nGrpTmp)
         return nil
      end
   end
   local nSrfId = EgtSurfTmByTriangles( nSolidGrpId, vSurfs)
    
   -- creazione del mezzo disco iniziale
   local nCap1 = CreateSpiralVaseCap( nSectId, - EgtSV( vIds[#vIds], GDB_ID.ROOT), nSolidGrpId)
   -- creazione del mezzo disco finale
   local nCap2 = CreateSpiralVaseCap( nSectE, EgtEV( vIds[#vIds], GDB_ID.ROOT), nSolidGrpId)
   EgtInvertSurf( nCap2)
  
   -- solido finale
   local nSolidId = EgtSurfTmByTriangles( nSolidGrpId, { nSrfId, nCap1, nCap2})

   -- limito il solido al piano di slicing precedente
   local ptPrev
   local vtPrev
   if EgtGetInfo( nLayerId, KEY_SLICE_NBR, 'i') == 1 then
      ptPrev = ptSlicing - LayerParams.dLayHeight * LayerParams.vtSlicing
      vtPrev = LayerParams.vtSlicing
   else
      local nPrevLayId = EgtGetPrev( nLayerId)
      vtPrev = EgtGetInfo( nPrevLayId, KEY_SLICE_DIR, 'v')
      ptPrev = EgtGetInfo( nPrevLayId, KEY_SLICE_POS, 'p') + vtPrev * LayerParams.dLayHeight
   end
   
   local nVertexCnt = EgtSurfTmVertexCount( nSolidId)
   for j = 0, nVertexCnt - 1 do
      local ptVertex = EgtSurfTmGetVertex( nSolidId, j, GDB_RT.GLOB)
      local _, ptMinDist = EgtPointCurveDist( ptVertex, vIds[#vIds], GDB_ID.ROOT)
      local dDistCrv = abs( ( ptVertex - ptMinDist) * LayerParams.vtSlicing)
      local dDistPlane = ( ptVertex - ptPrev) * vtPrev / ( vtPrev * LayerParams.vtSlicing)
      -- calcolo la nuova posizione sapendo che l'altezza dello strand passa da s_dMultiPlanarH a dNewH
      local dNewH = dDistCrv + dDistPlane
      local dDelta = dDistCrv - dDistCrv * dNewH / s_dMultiPlanarH
      local ptNew = ptVertex + dDelta * LayerParams.vtSlicing
      EgtSurfTmMoveVertex( nSolidId, j, ptNew, GDB_RT.GLOB, ( j == nVertexCnt - 1))
   end
   
   EgtSetColor( nSolidId, EgtStdColor( 'TEAL'))
   EgtErase( nGrpTmp)
   return true
end

---------------------------------------------------------------------
function RunCalcSolids.Exec()

   -- per determinare il tempo di calcolo
   EgtStartCounter()
   
   -- verifico se richiesta sezione semplificata ( rettangolare)
   local sIniFile = EgtGetIniFile()
   s_nSimplifiedSection = EgtGetNumberFromIni( 'Solids', 'SimplifiedSection', 0, sIniFile)

   local nPartIndex = 1
   local nPartId = EgtGetFirstNameInGroup( GDB_ID.ROOT, PART .. nPartIndex) or EgtGetFirstNameInGroup( GDB_ID.ROOT, PART)
   while nPartId do

      if EgtGetInfo( nPartId, KEY_PART_ON_TABLE, 'b') then
         -- verifico se necessario calcolare il solido
         local bCalcSolid = EgtGetInfo( nPartId, KEY_CALC_SOLIDS, 'b') or false

         if bCalcSolid then

            -- recupero il suo frame
            local nFrameId = EgtGetFirstNameInGroup( EgtGetFirstNameInGroup( nPartId, 'Frame'), 'FramePart')
            local ptOrig = EgtSP( nFrameId or GDB_ID.NULL, GDB_ID.ROOT)
            EgtSetInfo( nPartId, KEY_ORIG_REF, ptOrig)
            
            -- recupero i suoi slice
            local vLayIds = EgtGetNameInGroup( nPartId, SLICE_LAYER .. '*')
            if not vLayIds or #vLayIds == 0 then
               EgtOutBox( 'No sliced part in this project!', 'Error', 'ERROR')
               return
            end

            EgtSetInfo( nPartId, KEY_HAS_SOLIDS, 1)
            local nSlicingType = EgtGetInfo( nPartId, KEY_SLICING_TYPE, 'i')

            -- recupero i parametri necessari al calcolo dei solidi 
            local LayerParams = GetLayerParamsForSolidCalc( nPartId)
            
            -- se slicing multiplanare considero come altezza standard quella massima ammessa
            if nSlicingType == SLICING_TYPE.MULTIPLANAR then
               local dMaxFactor = EgtGetNumberFromIni( '3dPrinting', KEY_MAX_STRANDH_FACTOR, 2, EgtGetIniFile())
               s_dMultiPlanarH = min( dMaxFactor, 5) * LayerParams.dLayHeight
            end

            for nIdx = 1, #vLayIds do
               
               -- flag di interruzione perchè trovati solidi già ok
               local bSolidsOk = false
               -- indice layer ( per log)
               local nLayer = EgtGetInfo( vLayIds[ nIdx], KEY_SLICE_NBR, 'i')
               -- scorro tutti i gruppi di contorni
               local nCrvGrpId = EgtGetFirstNameInGroup( vLayIds[ nIdx], CONTOUR_GRP.."*") or GDB_ID.NULL
               while nCrvGrpId ~= GDB_ID.NULL do

                  -- recupero il gruppo dei percorsi utensile 
                  local nTPathGrpId = EgtGetFirstNameInGroup( nCrvGrpId, TOOLPATH_GRP) or GDB_ID.NULL
                  if nTPathGrpId == GDB_ID.NULL then
                     EgtOutBox( 'Error no tool paths', 'SolidCalc')
                     return
                  end

                  -- recupero il gruppo dei solidi 
                  local nSolidGrpId = EgtGetFirstNameInGroup( nCrvGrpId, SOLID_GRP) or GDB_ID.NULL
                  if nSolidGrpId == GDB_ID.NULL then
                     nSolidGrpId = EgtGroup( nCrvGrpId)
                     EgtSetName( nSolidGrpId, SOLID_GRP)
                     EgtSetLevel( nSolidGrpId, GDB_LV.TEMP)
                     
                     local vIds = EgtGetAllInGroup( nTPathGrpId)
                     
                     -- multiplanare
                     if nSlicingType == SLICING_TYPE.MULTIPLANAR then
                        LayerParams.vtSlicing = EgtGetInfo( vLayIds[nIdx], KEY_SLICE_DIR, 'v')
                        
                        if LayerParams.bSpiralVase then
                           local dTransitionLen = EgtGetInfo( nPartId, KEY_SPIRAL_VASE_LEN, 'd') or 0
                           if dTransitionLen < GEO.EPS_SMALL then
                              -- TO DO
                           else
                              if nIdx == #vLayIds then
                                 -- ultimo layer non ha tratto finale rialzato quindi è un multiplanare standard
                                 CreateMultiPlanarSolids( vIds, nSolidGrpId, LayerParams, vLayIds[nIdx])
                              else
                                 CreatePartialSpiralVaseMultiPlanarSolids( vIds, nSolidGrpId, LayerParams, vLayIds[nIdx])
                              end
                           end
                        else
                           CreateMultiPlanarSolids( vIds, nSolidGrpId, LayerParams, vLayIds[nIdx])
                        end
                        
                     -- slicing standard spiral vase
                     elseif LayerParams.bSpiralVase then
                        -- i tratti di ingresso, uscita e quelli a quota costante vanno gestiti singolarmente, quelli a quota variabile vanno concatenati
                        local vChainedIds = {}
                        local vTmpIds = {}
                        for i = 1, #vIds do
                           local sName = EgtGetName( vIds[i])
                           local dDelta = ( EgtEP( vIds[i], GDB_ID.ROOT) - EgtSP( vIds[i], GDB_ID.ROOT)) * LayerParams.vtSlicing
                           if abs( dDelta) < GEO.EPS_SMALL or sName == LEAD_IN_CRV or sName == LEAD_OUT_CRV or sName == COASTING_CRV or sName == WIPE_CRV then
                              -- inserisco il gruppo di tratti da concatenare e lo resetto
                              if #vTmpIds > 0 then 
                                 table.insert( vChainedIds, vTmpIds)
                                 vTmpIds = {}
                              end
                              -- inserisco la curva singola corrente
                              table.insert( vChainedIds, { vIds[i]})
                           else
                              table.insert( vTmpIds, vIds[i])
                           end
                        end
                        -- inserisco ultimo gruppo
                        if #vTmpIds > 0 then
                           table.insert( vChainedIds, vTmpIds)
                        end
                        
                        for i = 1, #vChainedIds do
                           if #vChainedIds[i] == 1 then
                              CreateSolidFromCurve( vChainedIds[i][1], nSolidGrpId, LayerParams, nLayer)
                           else
                              local nNewCrv = EgtCurveCompo( nSolidGrpId, vChainedIds[i], false)
                              local dStrand = EgtGetInfo( vChainedIds[i][1], KEY_CRV_STRAND, 'd') or LayerParams.dStrand
                              EgtSetInfo( nNewCrv, KEY_CRV_STRAND, dStrand)
                              EgtSetInfo( nNewCrv, KEY_TYPE, TYPE.OUTER_SHELL)
                              CreateSolidFromCurve( nNewCrv, nSolidGrpId, LayerParams, nLayer)
                              EgtErase( nNewCrv)
                           end
                        end
                        
                     -- slicing standard
                     else
                        for i = 1, #vIds do
                           CreateSolidFromCurve( vIds[i], nSolidGrpId, LayerParams, nLayer)
                        end
                     end
                  else
                     bSolidsOk = true
                     break
                  end

                  --passo al gruppo di contorni successivo
                  nCrvGrpId = EgtGetNextName( nCrvGrpId, CONTOUR_GRP.."*") or GDB_ID.NULL
               end
               if bSolidsOk then
                  break
               end
               local nStep = 10
               if nIdx > 400 then
                  nStep = 80
               elseif nIdx > 200 then
                  nStep = 40
               elseif nIdx > 100 then
                  nStep = 20
               end
               if ( nIdx % nStep) == 0 then
                  EgtDraw()
               end
               
               if EgtProcessEvents( EgtIf( PRINT, 400, 0) + nIdx / #vLayIds * 100, 0) == 1 then
                  -- se interrompo cancello i solidi realizzati
                  for i = 1, #vLayIds do
                     local vGrpId = EgtGetNameInGroup( vLayIds[i], CONTOUR_GRP .. '*') or {}
                     for j = 1, #vGrpId do
                        local nSolidId = EgtGetFirstNameInGroup( vGrpId[j], SOLID_GRP .. '*') or GDB_ID.NULL
                        EgtErase( nSolidId)
                     end
                  end
                  -- rimuovo info della presenza solidi
                  EgtSetInfo( nPartId, KEY_HAS_SOLIDS, false)
                  EgtDraw()
                  return
               end
            end

            -- eventuale aggiornamento delle ViewInfo
            local nViewId = EgtGetFirstNameInGroup( GDB_ID.ROOT, VIEWPARAMS)
            if nViewId then
               EgtSetInfo( nViewId, SOLID_GRP, true)
            end
         end
      end
      
      nPartIndex = nPartIndex + 1
      nPartId = EgtGetFirstNameInGroup( GDB_ID.ROOT, PART .. nPartIndex) or EgtGetNextName( nPartId, PART)
   end

   EgtDraw()

   -- report tempo di calcolo in log
   EgtOutLog( string.format( '  CalcSolidsTime = %.2f ms', EgtStopCounter()))

end

---------------------------------------------------------------------
return RunCalcSolids