Use angle step from prefs for rotation of PLs; Alt+parentheses rotate PLs by (constan...

diff --git a/src/box3d-context.cpp b/src/box3d-context.cpp
index 818a87c6c6d0a32ae56c85c10d32c9b65b6bad76..cb6dd1d0b4fa4c57db2a0d3642af6d7165a95431 100644 (file)
--- a/src/box3d-context.cpp
+++ b/src/box3d-context.cpp
@@ -295,6 +295,7 @@ static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEven
 
     SPDesktop *desktop = event_context->desktop;
     Inkscape::Selection *selection = sp_desktop_selection (desktop);
+    int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 
     SP3DBoxContext *bc = SP_3DBOX_CONTEXT(event_context);
 
@@ -452,32 +453,32 @@ static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEven
             break;
 
         case GDK_bracketright:
-            inkscape_active_document()->current_perspective->rotate (Box3D::X, -10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::X, -180/snaps, MOD__ALT);
             ret = true;
             break;
 
         case GDK_bracketleft:
-            inkscape_active_document()->current_perspective->rotate (Box3D::X, 10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::X, 180/snaps, MOD__ALT);
             ret = true;
             break;
 
         case GDK_parenright:
-            inkscape_active_document()->current_perspective->rotate (Box3D::Y, -10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::Y, -180/snaps, MOD__ALT);
             ret = true;
             break;
 
         case GDK_parenleft:
-            inkscape_active_document()->current_perspective->rotate (Box3D::Y, 10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::Y, 180/snaps, MOD__ALT);
             ret = true;
             break;
 
         case GDK_braceright:
-            inkscape_active_document()->current_perspective->rotate (Box3D::Z, -10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::Z, -180/snaps, MOD__ALT);
             ret = true;
             break;
 
         case GDK_braceleft:
-            inkscape_active_document()->current_perspective->rotate (Box3D::Z, 10);
+            inkscape_active_document()->current_perspective->rotate (Box3D::Z, 180/snaps, MOD__ALT);
             ret = true;
             break;
 

diff --git a/src/perspective3d.cpp b/src/perspective3d.cpp
index db4f564c7ec8a1d2c92ab8336fde798de0134054..3c7529c16aff11d884f2d7d057b738d68068d0ef 100644 (file)
--- a/src/perspective3d.cpp
+++ b/src/perspective3d.cpp
@@ -204,12 +204,13 @@ Perspective3D::set_infinite_direction (Box3D::Axis axis, NR::Point const dir)
 }
 
 void
-Perspective3D::rotate (Box3D::Axis const axis, double const angle)
+Perspective3D::rotate (Box3D::Axis const axis, double const angle, bool const alt_pressed)
 {
     Box3D::VanishingPoint *vp = get_vanishing_point (axis);
     if (!vp->is_finite()) {
+        double add_value = angle;
         double a = NR::atan2 (vp->v_dir) * 180/M_PI;
-        a += angle;
+        a += alt_pressed ? 0.5 * ((angle > 0 ) - (angle < 0)) : angle; // the r.h.s. yields +/-0.5 or angle
         a *= M_PI/180;
         this->set_infinite_direction (axis, NR::Point (cos (a), sin (a)));
     }

diff --git a/src/perspective3d.h b/src/perspective3d.h
index a431e1f99846344588cd0afd1e7022a8f26c03ba..caf503e0daf45d5d609a0b131d83bd9fda4f5606 100644 (file)
--- a/src/perspective3d.h
+++ b/src/perspective3d.h
@@ -36,7 +36,7 @@ public:
     void set_vanishing_point (Box3D::Axis const dir, VanishingPoint const &pt);
     void set_vanishing_point (Box3D::Axis const dir, gdouble pt_x, gdouble pt_y, gdouble dir_x, gdouble dir_y, VPState st);
     void set_infinite_direction (Box3D::Axis axis, NR::Point const dir);
-    void rotate (Box3D::Axis const dir, double const angle);
+    void rotate (Box3D::Axis const dir, double const angle, bool const alt_pressed = false);
     void add_box (SP3DBox *box);
     void remove_box (const SP3DBox *box);
     bool has_box (const SP3DBox *box) const;