From 70ed5c1ae82322fe06d5bb370f16667e050792f7 Mon Sep 17 00:00:00 2001
From: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
Date: Thu, 3 Jun 2021 22:30:00 +0200
Subject: [PATCH] router: introduce concept of 'virtual' vias as a base for
 shoving/dragging joints of lines of different widths.

---
 pcbnew/router/pns_item.h  |  8 ++++++++
 pcbnew/router/pns_via.cpp |  1 +
 pcbnew/router/pns_via.h   | 16 ++++++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/pcbnew/router/pns_item.h b/pcbnew/router/pns_item.h
index f59ccb8892..cbcca0b7b1 100644
--- a/pcbnew/router/pns_item.h
+++ b/pcbnew/router/pns_item.h
@@ -80,6 +80,7 @@ public:
         m_marker = 0;
         m_rank = -1;
         m_routable = true;
+        m_isVirtual = false;
     }
 
     ITEM( const ITEM& aOther )
@@ -93,6 +94,7 @@ public:
         m_marker = aOther.m_marker;
         m_rank = aOther.m_rank;
         m_routable = aOther.m_routable;
+        m_isVirtual = aOther.m_isVirtual;
     }
 
     virtual ~ITEM();
@@ -228,6 +230,11 @@ public:
     void SetRoutable( bool aRoutable ) { m_routable = aRoutable; }
     bool IsRoutable() const { return m_routable; }
 
+    bool IsVirtual() const
+    {
+        return m_isVirtual;
+    }
+
 private:
     bool collideSimple( const ITEM* aOther, const NODE* aNode, bool aDifferentNetsOnly ) const;
 
@@ -243,6 +250,7 @@ protected:
     mutable int   m_marker;
     int           m_rank;
     bool          m_routable;
+    bool          m_isVirtual;
 };
 
 template<typename T, typename S>
diff --git a/pcbnew/router/pns_via.cpp b/pcbnew/router/pns_via.cpp
index 45d141919a..a11f601ef9 100644
--- a/pcbnew/router/pns_via.cpp
+++ b/pcbnew/router/pns_via.cpp
@@ -100,6 +100,7 @@ VIA* VIA::Clone() const
     v->m_viaType = m_viaType;
     v->m_parent = m_parent;
     v->m_isFree = m_isFree;
+    v->m_isVirtual = m_isVirtual;
 
     return v;
 }
diff --git a/pcbnew/router/pns_via.h b/pcbnew/router/pns_via.h
index 116dfb492c..5f214ca011 100644
--- a/pcbnew/router/pns_via.h
+++ b/pcbnew/router/pns_via.h
@@ -55,6 +55,7 @@ public:
         m_drill    = 0;
         m_viaType  = VIATYPE::THROUGH;
         m_isFree   = false;
+        m_isVirtual = false;
     }
 
     VIA( const VECTOR2I& aPos, const LAYER_RANGE& aLayers, int aDiameter, int aDrill,
@@ -70,6 +71,7 @@ public:
         m_hole = SHAPE_CIRCLE( m_pos, aDrill / 2 );
         m_viaType = aViaType;
         m_isFree = false;
+        m_isVirtual = false;
     }
 
     VIA( const VIA& aB ) :
@@ -86,6 +88,7 @@ public:
         m_drill = aB.m_drill;
         m_viaType = aB.m_viaType;
         m_isFree = aB.m_isFree;
+        m_isVirtual = aB.m_isVirtual;
     }
 
     static inline bool ClassOf( const ITEM* aItem )
@@ -154,6 +157,19 @@ private:
     SHAPE_CIRCLE m_hole;
     VIATYPE      m_viaType;
     bool         m_isFree;
+
+};
+
+
+class VVIA : public VIA
+{
+public:
+    VVIA( const VECTOR2I& aPos, int aLayer, int aDiameter, int aNet ) :
+        VIA( aPos, LAYER_RANGE( aLayer, aLayer ), aDiameter, aDiameter / 2, aNet )
+    {
+        m_isVirtual = true;
+        SetHole( SHAPE_CIRCLE( Pos(), 1 ) );
+    }
 };
 
 }