From 7270446ff9feaf88a60f859dd37db2e9f3932a35 Mon Sep 17 00:00:00 2001
From: Abdullah Tahiri <abdullah.tahiri.yo@gmail.com>
Date: Fri, 15 Jun 2018 16:12:43 +0200
Subject: [PATCH] GCS: Extension of ConstraintEqual to allow for a
 proportionality factor

---
 src/Mod/Sketcher/App/planegcs/Constraints.cpp | 5 +++--
 src/Mod/Sketcher/App/planegcs/Constraints.h   | 3 ++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/Mod/Sketcher/App/planegcs/Constraints.cpp b/src/Mod/Sketcher/App/planegcs/Constraints.cpp
index 4152400d9e..2ee3d60325 100644
--- a/src/Mod/Sketcher/App/planegcs/Constraints.cpp
+++ b/src/Mod/Sketcher/App/planegcs/Constraints.cpp
@@ -97,8 +97,9 @@ int Constraint::findParamInPvec(double *param)
 }
 
 // Equal
-ConstraintEqual::ConstraintEqual(double *p1, double *p2)
+ConstraintEqual::ConstraintEqual(double *p1, double *p2, double p1p2ratio)
 {
+    ratio = p1p2ratio;
     pvec.push_back(p1);
     pvec.push_back(p2);
     origpvec = pvec;
@@ -117,7 +118,7 @@ void ConstraintEqual::rescale(double coef)
 
 double ConstraintEqual::error()
 {
-    return scale * (*param1() - *param2());
+    return scale * (*param1() - ratio *(*param2()));
 }
 
 double ConstraintEqual::grad(double *param)
diff --git a/src/Mod/Sketcher/App/planegcs/Constraints.h b/src/Mod/Sketcher/App/planegcs/Constraints.h
index 55437b9af3..02020651f9 100644
--- a/src/Mod/Sketcher/App/planegcs/Constraints.h
+++ b/src/Mod/Sketcher/App/planegcs/Constraints.h
@@ -131,10 +131,11 @@ namespace GCS
     class ConstraintEqual : public Constraint
     {
     private:
+        double ratio;
         inline double* param1() { return pvec[0]; }
         inline double* param2() { return pvec[1]; }
     public:
-        ConstraintEqual(double *p1, double *p2);
+        ConstraintEqual(double *p1, double *p2, double p1p2ratio=1.0);
         virtual ConstraintType getTypeId();
         virtual void rescale(double coef=1.);
         virtual double error();