Fixed a bug in bspline with snaps and 1 sice segments. Pointed by LiamW

(bzr r13341.1.12)

1 files changed, 19 insertions, 3 deletions

diff --git a/src/ui/tools/pen-tool.cpp b/src/ui/tools/pen-tool.cpp
index 9e4df5031..386dc43e9 100644
--- a/src/ui/tools/pen-tool.cpp
+++ b/src/ui/tools/pen-tool.cpp
@@ -1811,9 +1811,9 @@ void PenTool::_bspline_spiro_build()
 void PenTool::_bspline_doEffect(SPCurve * curve)
 {
     // commenting the function doEffect in src/live_effects/lpe-bspline.cpp
-    if(curve->get_segment_count() < 2)
-        return;
     Geom::PathVector const original_pathv = curve->get_pathvector();
+    if (curve->get_segment_count() < 1)
+        return;
     curve->reset();
 
     for(Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {
@@ -1890,9 +1890,25 @@ void PenTool::_bspline_doEffect(SPCurve * curve)
             ++curve_it1;
             ++curve_it2;
         }
+        SPCurve *out = new SPCurve();
+        out->moveto(curve_it1->initialPoint());
+        out->lineto(curve_it1->finalPoint());
+        cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it1);
+        if (cubic) {
+            SBasisOut = out->first_segment()->toSBasis();
+            nextPointAt1 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[1], *out->first_segment()));
+            nextPointAt2 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[2], *out->first_segment()));
+            nextPointAt3 = out->first_segment()->finalPoint();
+        } else {
+            nextPointAt1 = out->first_segment()->initialPoint();
+            nextPointAt2 = out->first_segment()->finalPoint();
+            nextPointAt3 = out->first_segment()->finalPoint();
+        }
+        out->reset();
+        delete out;
         SPCurve *curveHelper = new SPCurve();
         curveHelper->moveto(node);
-        Geom::Point startNode(0,0);
+        Geom::Point startNode = path_it->begin()->initialPoint();
         if (path_it->closed()) {
             SPCurve * start = new SPCurve();
             start->moveto(path_it->begin()->initialPoint());