From 0cc80021f29eff8586d7b5f22f274185bb9241e3 Mon Sep 17 00:00:00 2001
From: nds <nds@opencascade.com>
Date: Wed, 16 Mar 2016 17:05:11 +0300
Subject: [PATCH] Angle presentation: proving clockwise and counterclockwise
 angles.

---
 src/SketcherPrs/AIS_AngleDimension.cxx | 29 +++++++++++++++++++-------
 src/SketcherPrs/AIS_AngleDimension.hxx |  3 ++-
 src/SketcherPrs/SketcherPrs_Angle.cpp  |  6 +++---
 3 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/src/SketcherPrs/AIS_AngleDimension.cxx b/src/SketcherPrs/AIS_AngleDimension.cxx
index 4e2673625..a9b83a87c 100755
--- a/src/SketcherPrs/AIS_AngleDimension.cxx
+++ b/src/SketcherPrs/AIS_AngleDimension.cxx
@@ -277,7 +277,7 @@ void AIS_AngleDimension::SetMeasuredGeometry (const TopoDS_Face& theFirstFace,
 //=======================================================================
 void AIS_AngleDimension::Init()
 {
-  SetGeometryOrientedAngle (Standard_False);
+  SetGeometryOrientedAngle (Standard_False, Standard_False);
   SetSpecialSymbol (THE_DEGREE_SYMBOL);
   SetDisplaySpecialSymbol (AIS_DSS_After);
   SetFlyout (15.0);
@@ -339,10 +339,22 @@ void AIS_AngleDimension::DrawArc (const Handle(Prs3d_Presentation)& thePresentat
 
   gp_Pln aPlane = aConstructPlane.Value();
   if (myGeometryOrientedAngle) {
-    gp_Ax1 anAxis = aPlane.Axis();
-    gp_Dir aDir = anAxis.Direction();
-    aDir.Reverse();
-    aPlane.SetAxis(gp_Ax1(anAxis.Location(), aDir));
+    gp_Dir aCPlaneDir = aPlane.Axis().Direction();
+    bool aCPlaneDirToReverse = aCPlaneDir.X() < 0 || aCPlaneDir.Y() < 0 || aCPlaneDir.Z() < 0;
+    // have similar direction for all cases
+    if (!aCPlaneDirToReverse && myUseReverse) {
+      gp_Ax1 anAxis = aPlane.Axis();
+      gp_Dir aDir = anAxis.Direction();
+      aDir.Reverse();
+      aPlane.SetAxis(gp_Ax1(anAxis.Location(), aDir));
+    }
+
+    if (aCPlaneDirToReverse && !myUseReverse) {
+      gp_Ax1 anAxis = aPlane.Axis();
+      gp_Dir aDir = anAxis.Direction();
+      aDir.Reverse();
+      aPlane.SetAxis(gp_Ax1(anAxis.Location(), aDir));
+    }
   }
   
   // construct circle forming the arc
@@ -355,8 +367,7 @@ void AIS_AngleDimension::DrawArc (const Handle(Prs3d_Presentation)& thePresentat
   gp_Circ aCircle = aConstructCircle.Value();
 
   // construct the arc
-  Standard_Boolean isArcSense = !myGeometryOrientedAngle;
-  GC_MakeArcOfCircle aConstructArc(aCircle, theFirstAttach, theSecondAttach, isArcSense);
+  GC_MakeArcOfCircle aConstructArc(aCircle, theFirstAttach, theSecondAttach, Standard_True);
   if (!aConstructArc.IsDone())
   {
     return;
@@ -1242,9 +1253,11 @@ void AIS_AngleDimension::SetTextPosition (const gp_Pnt& theTextPos)
 //function : SetGeometryOrientedAngle
 //purpose  : 
 //=======================================================================
-void AIS_AngleDimension::SetGeometryOrientedAngle(const Standard_Boolean& theState)
+void AIS_AngleDimension::SetGeometryOrientedAngle(const Standard_Boolean& theState,
+                                                  const Standard_Boolean& theUseReverse)
 {
   myGeometryOrientedAngle = theState;
+  myUseReverse = theUseReverse;
 }
 
 //=======================================================================
diff --git a/src/SketcherPrs/AIS_AngleDimension.hxx b/src/SketcherPrs/AIS_AngleDimension.hxx
index 5e2c13390..35851393c 100755
--- a/src/SketcherPrs/AIS_AngleDimension.hxx
+++ b/src/SketcherPrs/AIS_AngleDimension.hxx
@@ -210,7 +210,7 @@ public:
   //! Sets state if the create arc should be built depending on the input geometry orientation
   //! or to be always oriented in [0,0,1]. The last case propose angles more than 180 degree.
   //! @param theSecondAttach [in] the second attachment point.
-  void SetGeometryOrientedAngle(const Standard_Boolean& theState);
+  void SetGeometryOrientedAngle(const Standard_Boolean& theState, const Standard_Boolean& theUseReverse);
 
 public:
 
@@ -341,6 +341,7 @@ protected:
 
 private:
   Standard_Boolean myGeometryOrientedAngle;
+  Standard_Boolean myUseReverse;
 
   gp_Pnt myFirstPoint;
   gp_Pnt mySecondPoint;
diff --git a/src/SketcherPrs/SketcherPrs_Angle.cpp b/src/SketcherPrs/SketcherPrs_Angle.cpp
index d5f3cff71..aa33c558e 100644
--- a/src/SketcherPrs/SketcherPrs_Angle.cpp
+++ b/src/SketcherPrs/SketcherPrs_Angle.cpp
@@ -116,13 +116,13 @@ void SketcherPrs_Angle::Compute(const Handle(PrsMgr_PresentationManager3d)& theP
 
   switch (anAngleType) {
     case ANGLE_DIRECT: {
-      SetGeometryOrientedAngle(false);
+      SetGeometryOrientedAngle(true, false);
       SetMeasuredGeometry(aEdge1, aEdge2);
     }
     break;
     case ANGLE_SUPPLEMENTARY: {
       // to calculate center, first and end points
-      SetGeometryOrientedAngle(false);
+      SetGeometryOrientedAngle(false, false);
       SetMeasuredGeometry(aEdge1, aEdge2);
       gp_Pnt aCenterPnt = CenterPoint();
       gp_Pnt aFirstPnt = FirstPoint();
@@ -133,7 +133,7 @@ void SketcherPrs_Angle::Compute(const Handle(PrsMgr_PresentationManager3d)& theP
     }
     break;
     case ANGLE_BACKWARD: {
-      SetGeometryOrientedAngle(true);
+      SetGeometryOrientedAngle(true, true);
       SetMeasuredGeometry(aEdge1, aEdge2);
     }
     break;
-- 
2.39.2