From 20b56583c3a0f164f6330482ee9577efd3ec8694 Mon Sep 17 00:00:00 2001
From: Dario Sassi <dario.sassi@egalware.com>
Date: Wed, 15 Apr 2026 19:03:44 +0200
Subject: [PATCH] EgtMachKernel 3.1d4 : - in fresatura con lama a ZigZag con
 SideStep correzione per attacco/uscita sbagliati con numero pari di step.

---
 EgtMachKernel.rc | Bin 11774 -> 11774 bytes
 Milling.cpp      |  14 ++++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index f55ad18357ca7c94b37f40afd559873a62aeee4c..fb07e835c3ea66b029570e9e8547ad2e637cc97b 100644
GIT binary patch
delta 97
zcmewt{V#gMFE&P#&A-`fnHfzcKa|wnoW?bQ1uSxrY4Qod0+^@}R1`^_2jk{d(jGv4
NK<#LXK~l;gTmUI`BbWdH

delta 97
zcmewt{V#gMFE&Qw&A-`fnHh~IKa|wnoW?bQ1uSxrY4Qod0+^@}R1`^_2jk{d(jGv4
NK<#LXK~l;gTmUD-Bai?9

diff --git a/Milling.cpp b/Milling.cpp
index 3429cb0..2b5d7b1 100644
--- a/Milling.cpp
+++ b/Milling.cpp
@@ -4034,8 +4034,9 @@ Milling::AddSawZigZagMilling( const ICurveComposite* pCompo, const Vector3d& vtT
    }
    bool bAdjustLoPerp = ( m_Params.m_dLoPerp > 10 * EPS_SMALL) ;
    if ( bAdjustLoPerp) {
-      m_Params.m_dLoTang = 0 ;
-      m_Params.m_dLoPerp = 0. ;
+      double dNewLoPerp = max( 0., m_Params.m_dLoPerp - ( nStep - 1) * dStep) ;
+      m_Params.m_dLoTang *= dNewLoPerp / m_Params.m_dLoPerp ;
+      m_Params.m_dLoPerp = dNewLoPerp ;
    }
 
   // ciclo sugli step
@@ -4059,11 +4060,16 @@ Milling::AddSawZigZagMilling( const ICurveComposite* pCompo, const Vector3d& vtT
          if ( ! TrimExtendCurveToClosedStm( pMyCompo, nTriExtCstm, bInvert))
             pMyCompo.Set( pMyCopy) ;
       }
-     // dopo primo step annullo parametri di attacco
-      if ( j > 1  &&  bAdjustLiPerp) {
+     // se necessario e invertito oppure step successivo annullo parametri di attacco
+      if ( bAdjustLiPerp  &&  ( bInvert  ||  j == 2)) {
          m_Params.m_dLiPerp = 0. ;
          m_Params.m_dLiTang = 0. ;
       }
+     // se necessario e non invertito oppure step successivo annullo parametri di uscita
+      if ( bAdjustLoPerp  &&  ( ! bInvert  ||  j == 2)) {
+         m_Params.m_dLoPerp = 0. ;
+         m_Params.m_dLoTang = 0. ;
+      }
      // ciclo sulle curve elementari
       int nMaxInd = pMyCompo->GetCurveCount() - 1 ;
       for ( int i = 0 ; i <= nMaxInd ; ++ i) {