Allow adding spline points.

src/drawentity.cpp

@@ -17,7 +17,7 @@ std::string Entity::DescriptionString(void) {
     }
 }
 
-void Entity::LineDrawOrGetDistance(Vector a, Vector b, bool maybeFat) {
+void Entity::LineDrawOrGetDistance(Vector a, Vector b, bool maybeFat, int data) {
     if(dogd.drawing) {
         // Draw lines from active group in front of those from previous
         ssglDepthRangeOffset((group.v == SS.GW.activeGroup.v) ? 4 : 3);
@@ -32,7 +32,10 @@ void Entity::LineDrawOrGetDistance(Vector a, Vector b, bool maybeFat) {
         double d = dogd.mp.DistanceToLine(ap, bp.Minus(ap), true);
         // A little bit easier to select in the active group
         if(group.v == SS.GW.activeGroup.v) d -= 1;
-        dogd.dmin = min(dogd.dmin, d);
+        if(d < dogd.dmin) {
+            dogd.dmin = d;
+            dogd.data = data;
+        }
     }
     dogd.refp = (a.Plus(b)).ScaledBy(0.5);
 }
@@ -127,7 +130,7 @@ void Entity::GenerateEdges(SEdgeList *el, bool includingConstruction) {
         List<Vector> lv = {};
         sb->MakePwlInto(&lv);
         for(j = 1; j < lv.n; j++) {
-            el->AddEdge(lv.elem[j-1], lv.elem[j], style.v);
+            el->AddEdge(lv.elem[j-1], lv.elem[j], style.v, i);
         }
         lv.Clear();
     }
@@ -707,10 +710,10 @@ void Entity::DrawOrGetDistance(void) {
     // And draw the curves; generate the rational polynomial curves for
     // everything, then piecewise linearize them, and display those.
     SEdgeList *sel = GetOrGenerateEdges();
-    int i;
-    for(i = 0; i < sel->l.n; i++) {
+    dogd.data = -1;
+    for(int i = 0; i < sel->l.n; i++) {
         SEdge *se = &(sel->l.elem[i]);
-        LineDrawOrGetDistance(se->a, se->b, true);
+        LineDrawOrGetDistance(se->a, se->b, true, se->auxB);
     }
 }
 

src/modify.cpp

@@ -15,13 +15,10 @@ void GraphicsWindow::ReplacePointInConstraints(hEntity oldpt, hEntity newpt) {
     int i;
     for(i = 0; i < SK.constraint.n; i++) {
         Constraint *c = &(SK.constraint.elem[i]);
-
-        if(c->type == Constraint::POINTS_COINCIDENT) {
         if(c->ptA.v == oldpt.v) c->ptA = newpt;
         if(c->ptB.v == oldpt.v) c->ptB = newpt;
     }
 }
-}
 
 //-----------------------------------------------------------------------------
 // Remove constraints on hpt. Useful when removing bezier points.

src/mouse.cpp

@@ -528,6 +528,11 @@ void GraphicsWindow::MouseRightUp(double x, double y) {
         return;
     }
 
+    // The current mouse location
+    Vector v = offset.ScaledBy(-1);
+    v = v.Plus(projRight.ScaledBy(x/scale));
+    v = v.Plus(projUp.ScaledBy(y/scale));
+
     context.active = true;
 
     if(!hover.IsEmpty()) {
@@ -537,6 +542,7 @@ void GraphicsWindow::MouseRightUp(double x, double y) {
     GroupSelection();
 
     bool itemsSelected = (gs.n > 0 || gs.constraints > 0);
+    int addAfterPoint = -1;
 
     if(itemsSelected) {
         if(gs.stylables > 0) {
@@ -581,6 +587,22 @@ void GraphicsWindow::MouseRightUp(double x, double y) {
             }
         }
 
+        if(gs.entities == 1) {
+            hRequest hr = gs.entity[0].request();
+            if(hr.v != 0) {
+                Request *r = SK.GetRequest(hr);
+                if(r->type == Request::CUBIC || r->type == Request::CUBIC_PERIODIC) {
+                    Entity *e = SK.GetEntity(gs.entity[0]);
+                    e->GetDistance(Point2d::From(x, y));
+                    addAfterPoint = e->dogd.data;
+                    if(addAfterPoint == -1) oops();
+                    // Skip derivative point.
+                    if(r->type == Request::CUBIC) addAfterPoint++;
+                    AddContextMenuItem("Add Spline Point", CMNU_ADD_SPLINE_PT);
+                }
+            }
+        }
+
         if(gs.points == 1) {
             Entity *p = SK.GetEntity(gs.point[0]);
             Constraint *c;
@@ -717,6 +739,36 @@ void GraphicsWindow::MouseRightUp(double x, double y) {
             break;
         }
 
+        case CMNU_ADD_SPLINE_PT: {
+            hRequest hr = gs.entity[0].request();
+            Request *r = SK.GetRequest(hr);
+
+            int pointCount = r->extraPoints + ((r->type == Request::CUBIC_PERIODIC) ? 3 : 4);
+            if(pointCount < MAX_POINTS_IN_ENTITY) {
+                SS.UndoRemember();
+                r->extraPoints++;
+                SS.MarkGroupDirtyByEntity(gs.entity[0]);
+                SS.GenerateAll(SolveSpaceUI::GENERATE_REGEN);
+
+                Entity *e = SK.GetEntity(r->h.entity(0));
+                for(int i = MAX_POINTS_IN_ENTITY; i > addAfterPoint + 1; i--) {
+                    Entity *p0 = SK.entity.FindByIdNoOops(e->point[i]);
+                    if(p0 == NULL) continue;
+                    Entity *p1 = SK.GetEntity(e->point[i - 1]);
+                    ReplacePointInConstraints(p1->h, p0->h);
+                    p0->PointForceTo(p1->PointGetNum());
+                }
+                Entity *p = SK.GetEntity(e->point[addAfterPoint + 1]);
+                p->PointForceTo(v);
+                SS.MarkGroupDirtyByEntity(gs.entity[0]);
+                SS.ScheduleGenerateAll();
+                ClearSelection();
+            } else {
+                Error("Cannot add spline point: maximum number of points reached.");
+            }
+            break;
+        }
+
         case CMNU_GROUP_INFO: {
             hGroup hg;
             if(gs.entities == 1) {

src/sketch.h

@@ -492,8 +492,9 @@ public:
         double      lineWidth;
         double      stippleScale;
         int         stippleType;
+        int         data;
     } dogd; // state for drawing or getting distance (for hit testing)
-    void LineDrawOrGetDistance(Vector a, Vector b, bool maybeFat=false);
+    void LineDrawOrGetDistance(Vector a, Vector b, bool maybeFat=false, int userData = -1);
     void DrawOrGetDistance(void);
 
     bool IsStylable();

src/ui.h

@@ -680,6 +680,7 @@ public:
         CMNU_DEL_COINCIDENT   = 0x132,
         CMNU_SNAP_TO_GRID     = 0x140,
         CMNU_REMOVE_SPLINE_PT = 0x141,
+        CMNU_ADD_SPLINE_PT    = 0x142,
         CMNU_FIRST_STYLE      = 0x40000000
     };
     void ContextMenuListStyles(void);