DXF: only export visible constraints.

src/drawconstraint.cpp

@@ -377,21 +377,27 @@ void Constraint::DoArcForAngle(Vector a0, Vector da, Vector b0, Vector db,
     }
 }
 
-void Constraint::DrawOrGetDistance(Vector *labelPos) {
+bool Constraint::IsVisible() const {
-    if(!SS.GW.showConstraints) return;
+    if(!SS.GW.showConstraints) return false;
     Group *g = SK.GetGroup(group);
     // If the group is hidden, then the constraints are hidden and not
     // able to be selected.
-    if(!(g->visible)) return;
+    if(!(g->visible)) return false;
     // And likewise if the group is not the active group; except for comments
     // with an assigned style.
     if(g->h.v != SS.GW.activeGroup.v && !(type == COMMENT && disp.style.v)) {
-        return;
+        return false;
     }
     if(disp.style.v) {
         Style *s = Style::Get(disp.style);
-        if(!s->visible) return;
+        if(!s->visible) return false;
     }
+    return true;
+}
+
+void Constraint::DrawOrGetDistance(Vector *labelPos) {
+    
+    if(!IsVisible()) return;
     
     // Unit vectors that describe our current view of the scene. One pixel
     // long, not one actual unit.

src/exportvector.cpp

@@ -124,6 +124,7 @@ public:
         if(writer->constraint) {
             Constraint *c;
             for(c = writer->constraint->First(); c; c = writer->constraint->NextAfter(c)) {
+                if(!writer->NeedToOutput(c)) continue;
                 switch(c->type) {
                     case Constraint::PT_PT_DISTANCE: {
                         Vector ap = SK.GetEntity(c->ptA)->PointGetNum();
@@ -469,6 +470,18 @@ void DxfFileWriter::FinishAndCloseFile(void) {
     constraint = NULL;
 }
 
+bool DxfFileWriter::NeedToOutput(Constraint *c) {
+    switch(c->type) {
+        case Constraint::PT_PT_DISTANCE:
+        case Constraint::PT_LINE_DISTANCE:
+        case Constraint::DIAMETER:
+        case Constraint::ANGLE:
+        case Constraint::COMMENT:
+            return c->IsVisible();
+    }
+    return false;
+}
+
 //-----------------------------------------------------------------------------
 // Routines for EPS output
 //-----------------------------------------------------------------------------

src/sketch.h

@@ -680,6 +680,7 @@ public:
     bool IsStylable();
 
     void LineDrawOrGetDistance(Vector a, Vector b);
+    bool IsVisible() const;
     void DrawOrGetDistance(Vector *labelPos);
     double EllipticalInterpolation(double rx, double ry, double theta);
     std::string Label(void);

src/solvespace.h

@@ -553,6 +553,7 @@ public:
     void StartFile(void);
     void FinishAndCloseFile(void);
     bool HasCanvasSize(void) { return false; }
+    bool NeedToOutput(Constraint *c);
 };
 class EpsFileWriter : public VectorFileWriter {
 public: