Little changes, more pwls in a circle, and make "same orientation"

constraints work mod 180 degrees, so that it snaps to however the
workplane was drawn (more vertical vs. more horizontal).

[git-p4: depot-paths = "//depot/solvespace/": change = 1714]

constraint.cpp

@@ -564,7 +564,15 @@ void Constraint::Generate(IdList<Equation,hEquation> *l) {
             
             AddEq(l, VectorsParallel(0, an, bn), 0);
             AddEq(l, VectorsParallel(1, an, bn), 1);
-            AddEq(l, au.Dot(bv), 2);
+            Expr *d1 = au.Dot(bv);
+            Expr *d2 = au.Dot(bu);
+            // Allow either orientation for the coordinate system, depending
+            // on how it was drawn.
+            if(fabs(d1->Eval()) < fabs(d2->Eval())) {
+                AddEq(l, d1, 2);
+            } else {
+                AddEq(l, d2, 2);
+            }
             break;
         }
 

entity.cpp

@@ -558,7 +558,7 @@ void Entity::DrawOrGetDistance(int order) {
             Vector center = SS.GetEntity(point[0])->PointGetNum();
             Vector u = q.RotationU(), v = q.RotationV();
 
-            int i, c = 20;
+            int i, c = 40;
             Vector prev = u.ScaledBy(r).Plus(center);
             for(i = 1; i <= c; i++) {
                 double phi = (2*PI*i)/c;

graphicswin.cpp

@@ -39,7 +39,8 @@ const GraphicsWindow::MenuEntry GraphicsWindow::menu[] = {
 { 1, "Dimensions in &Millimeters",          MNU_UNITS_MM,       0,      mView },
 
 { 0, "&Group",                              0,                  0,      NULL  },
-{ 1, "New &Drawing Group\tShift+Ctrl+D",    MNU_GROUP_DRAWING,  'D'|S|C,mGrp  },
+{ 1, "New &Drawing in 3d\tShift+Ctrl+D",    MNU_GROUP_3D,      'D'|S|C, mGrp  },
+{ 1, "New Drawing in Workplane\tShift+Ctrl+W",MNU_GROUP_WRKPL, 'W'|S|C, mGrp  },
 { 1, NULL,                                  0,                          NULL  },
 { 1, "New Step and Repeat &Translating",    0,                  0,      NULL  },
 { 1, "New Step and Repeat &Rotating",       0,                  0,      NULL  },

polygon.h

@@ -43,6 +43,7 @@ class SEdgeList {
 public:
     SList<SEdge>    l;
 
+    void InsertEdgeBreaking(SEdge *e);
     bool AssemblePolygon(SPolygon *dest, SEdge *errorAt);
 };
 

sketch.cpp

@@ -23,7 +23,7 @@ void Group::MenuGroup(int id) {
     g.visible = true;
 
     switch(id) {
-        case GraphicsWindow::MNU_GROUP_DRAWING:
+        case GraphicsWindow::MNU_GROUP_3D:
             g.type = DRAWING;
             g.name.strcpy("drawing");
             break;

ui.h

@@ -109,7 +109,8 @@ public:
         MNU_CUBIC,
         MNU_CONSTRUCTION,
         // Group
-        MNU_GROUP_DRAWING,
+        MNU_GROUP_3D,
+        MNU_GROUP_WRKPL,
         MNU_GROUP_EXTRUDE,
         // Constrain
         MNU_DISTANCE_DIA,