From 4d7a9435c1939cb4ed8be4c7ee189f4edfa04a4b Mon Sep 17 00:00:00 2001
From: logari81 <logari81@e8eeb9e2-ec13-0410-a4a9-efa5cf37419d>
Date: Thu, 17 Nov 2011 21:53:40 +0000
Subject: [PATCH] + use a trick to improve edge dragging of arcs and circles
 (until we find a more proper solution)

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5149 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d
---
 src/Mod/Sketcher/App/Sketch.cpp      | 8 ++++++--
 src/Mod/Sketcher/App/freegcs/GCS.cpp | 8 ++++++++
 src/Mod/Sketcher/App/freegcs/GCS.h   | 3 ++-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/Mod/Sketcher/App/Sketch.cpp b/src/Mod/Sketcher/App/Sketch.cpp
index 16e73200f..2fef3af1e 100644
--- a/src/Mod/Sketcher/App/Sketch.cpp
+++ b/src/Mod/Sketcher/App/Sketch.cpp
@@ -1497,7 +1497,9 @@ int Sketch::initMove(int geoId, PointPos pos)
             p1.y = &MoveParameters[3];
             *p1.x = *center.x;
             *p1.y = *center.y;
-            GCSsys.addConstraintP2PCoincident(p1,center,-1);
+            int i=GCSsys.addConstraintP2PCoincident(p1,center,-1);
+            GCSsys.rescaleConstraint(i-1, 0.01);
+            GCSsys.rescaleConstraint(i, 0.01);
         }
     } else if (Geoms[geoId].type == Arc) {
         GCS::Point &center = Points[Geoms[geoId].midPointId];
@@ -1531,7 +1533,9 @@ int Sketch::initMove(int geoId, PointPos pos)
             p1.y = &MoveParameters[3];
             *p1.x = *center.x;
             *p1.y = *center.y;
-            GCSsys.addConstraintP2PCoincident(p1,center,-1);
+            int i=GCSsys.addConstraintP2PCoincident(p1,center,-1);
+            GCSsys.rescaleConstraint(i-1, 0.01);
+            GCSsys.rescaleConstraint(i, 0.01);
         }
     }
     InitParameters = MoveParameters;
diff --git a/src/Mod/Sketcher/App/freegcs/GCS.cpp b/src/Mod/Sketcher/App/freegcs/GCS.cpp
index fb8c78f2a..e20a03eca 100644
--- a/src/Mod/Sketcher/App/freegcs/GCS.cpp
+++ b/src/Mod/Sketcher/App/freegcs/GCS.cpp
@@ -403,6 +403,14 @@ int System::addConstraintP2PSymmetric(Point &p1, Point &p2, Line &l, int tagId)
     return addConstraintMidpointOnLine(p1, p2, l.p1, l.p2, tagId);
 }
 
+void System::rescaleConstraint(int id, double coeff)
+{
+    if (id >= clist.size() || id < 0)
+        return;
+    if (clist[id])
+        clist[id]->rescale(coeff);
+}
+
 
 void System::initSolution(VEC_pD &params)
 {
diff --git a/src/Mod/Sketcher/App/freegcs/GCS.h b/src/Mod/Sketcher/App/freegcs/GCS.h
index ce30a3013..9e809c6c2 100644
--- a/src/Mod/Sketcher/App/freegcs/GCS.h
+++ b/src/Mod/Sketcher/App/freegcs/GCS.h
@@ -74,7 +74,7 @@ namespace GCS
         System();
         System(std::vector<Constraint *> clist_);
         ~System();
-        
+
         void clear();
         void clearByTag(int tagId);
 
@@ -124,6 +124,7 @@ namespace GCS
         int addConstraintEqualRadius(Circle &c1, Arc &a2, int tagId=0);
         int addConstraintEqualRadius(Arc &a1, Arc &a2, int tagId=0);
         int addConstraintP2PSymmetric(Point &p1, Point &p2, Line &l, int tagId=0);
+        void rescaleConstraint(int id, double coeff);
 
         void initSolution(VEC_pD &params);