X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fbox3d.cpp;h=ff00a795c57505d50c8475fa83ed835cd16e4740;hb=b7d95f994b4858eeab9ce480b04933b5e94d40eb;hp=0cf0743dbc6568f4218e1cb9aae1400be3635c29;hpb=492de225e9b11f35d98b6b75efa58e115ee688fa;p=inkscape.git

diff --git a/src/box3d.cpp b/src/box3d.cpp
index 0cf0743db..ff00a795c 100644
--- a/src/box3d.cpp
+++ b/src/box3d.cpp
@@ -234,7 +234,15 @@ sp_3dbox_update(SPObject *object, SPCtx *ctx, guint flags)
 {
     if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
         SP3DBox *box = SP_3DBOX(object);
-        sp_3dbox_link_to_existing_paths (box, SP_OBJECT_REPR(object));
+        Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
+        sp_3dbox_link_to_existing_paths (box, repr);
+        SPEventContext *ec = inkscape_active_event_context();
+        if (SP_IS_3DBOX_CONTEXT (ec)) {
+            SP_3DBOX_CONTEXT (ec)->_vpdrag->updateDraggers();
+            // FIXME: Should we update the corners here, too? Maybe this is the reason why the handles
+            //        are off after an undo/redo! On the other hand, if we do so we get warnings about
+            //        updates occuring while other updats are in progress ...
+        }
     }
 
     /* Invoke parent method */
@@ -798,6 +806,23 @@ sp_3dbox_link_to_existing_paths (SP3DBox *box, Inkscape::XML::Node *repr) {
     }
 }
 
+void
+sp_3dbox_reshape_after_VP_rotation (SP3DBox *box, Box3D::Axis axis)
+{
+    Box3D::Perspective3D *persp = inkscape_active_document()->get_persp_of_box (box);
+    Box3D::VanishingPoint *vp = persp->get_vanishing_point (axis);
+
+    guint c1 = (axis == Box3D::Z) ? 1 : sp_3dbox_get_front_corner_id (box); // hack
+    guint c2 = c1 ^ axis;
+    NR::Point v = box->corners[c1] - box->corners[c2];
+    double dist = NR::L2 (v) * ((NR::dot (v, vp->v_dir) < 0) ? 1 : -1); // "directed" distance
+
+    Box3D::PerspectiveLine pline (box->corners[c1], axis, persp);
+    NR::Point pt = pline.point_from_lambda (dist);
+
+    sp_3dbox_move_corner_in_Z_direction (box, c2, pt, axis == Box3D::Z);
+}
+
 void
 sp_3dbox_move_corner_in_XY_plane (SP3DBox *box, guint id, NR::Point pt, Box3D::Axis axes)
 {
@@ -1019,6 +1044,9 @@ sp_3dbox_new_midpoints (Box3D::Perspective3D *persp, Box3D::Axis axis, NR::Point
         // FIXME: cr == 1 is a degenerate case; how should we deal with it?
         return std::make_pair (NR::Point (0,0), NR::Point (0,0));
     }
+    if (cr1 == NR_HUGE) {
+        return std::make_pair (A, B);
+    }
     Box3D::PerspectiveLine pl (M0, axis, persp);
     NR::Point B_new = pl.pt_with_given_cross_ratio (M0, M, cr1 / (cr1 - 1));
     NR::Point A_new = pl.pt_with_given_cross_ratio (M0, M, 1 - cr2);