Commit: 91556cb973ef8bfc0f159d0113a37918d4b868d3
Author: Campbell Barton
Date:   Fri Jul 15 17:07:18 2016 +1000
Branches: master
https://developer.blender.org/rB91556cb973ef8bfc0f159d0113a37918d4b868d3

Add "Snap Selection to Active" option in menu

D1963 by @wisaac, re-worked to de-duplicate logic

===================================================================

M       release/scripts/startup/bl_ui/space_view3d.py
M       source/blender/editors/space_view3d/view3d_intern.h
M       source/blender/editors/space_view3d/view3d_ops.c
M       source/blender/editors/space_view3d/view3d_snap.c

===================================================================

diff --git a/release/scripts/startup/bl_ui/space_view3d.py 
b/release/scripts/startup/bl_ui/space_view3d.py
index 09e3bf3..5e8eaf5 100644
--- a/release/scripts/startup/bl_ui/space_view3d.py
+++ b/release/scripts/startup/bl_ui/space_view3d.py
@@ -367,6 +367,7 @@ class VIEW3D_MT_snap(Menu):
         layout.operator("view3d.snap_selected_to_grid", text="Selection to 
Grid")
         layout.operator("view3d.snap_selected_to_cursor", text="Selection to 
Cursor").use_offset = False
         layout.operator("view3d.snap_selected_to_cursor", text="Selection to 
Cursor (Offset)").use_offset = True
+        layout.operator("view3d.snap_selected_to_active", text="Selection to 
Active")
 
         layout.separator()
 
diff --git a/source/blender/editors/space_view3d/view3d_intern.h 
b/source/blender/editors/space_view3d/view3d_intern.h
index 6d831c6..bdd2702 100644
--- a/source/blender/editors/space_view3d/view3d_intern.h
+++ b/source/blender/editors/space_view3d/view3d_intern.h
@@ -274,6 +274,7 @@ bool ED_view3d_minmax_verts(struct Object *obedit, float 
min[3], float max[3]);
 
 void VIEW3D_OT_snap_selected_to_grid(struct wmOperatorType *ot);
 void VIEW3D_OT_snap_selected_to_cursor(struct wmOperatorType *ot);
+void VIEW3D_OT_snap_selected_to_active(struct wmOperatorType *ot);
 void VIEW3D_OT_snap_cursor_to_grid(struct wmOperatorType *ot);
 void VIEW3D_OT_snap_cursor_to_center(struct wmOperatorType *ot);
 void VIEW3D_OT_snap_cursor_to_selected(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_view3d/view3d_ops.c 
b/source/blender/editors/space_view3d/view3d_ops.c
index 1c84ce3..b273f46 100644
--- a/source/blender/editors/space_view3d/view3d_ops.c
+++ b/source/blender/editors/space_view3d/view3d_ops.c
@@ -214,6 +214,7 @@ void view3d_operatortypes(void)
        
        WM_operatortype_append(VIEW3D_OT_snap_selected_to_grid);
        WM_operatortype_append(VIEW3D_OT_snap_selected_to_cursor);
+       WM_operatortype_append(VIEW3D_OT_snap_selected_to_active);
        WM_operatortype_append(VIEW3D_OT_snap_cursor_to_grid);
        WM_operatortype_append(VIEW3D_OT_snap_cursor_to_center);
        WM_operatortype_append(VIEW3D_OT_snap_cursor_to_selected);
diff --git a/source/blender/editors/space_view3d/view3d_snap.c 
b/source/blender/editors/space_view3d/view3d_snap.c
index e8e7d3c..e87b251 100644
--- a/source/blender/editors/space_view3d/view3d_snap.c
+++ b/source/blender/editors/space_view3d/view3d_snap.c
@@ -204,7 +204,7 @@ void VIEW3D_OT_snap_selected_to_grid(wmOperatorType *ot)
 
 /* *************************************************** */
 
-static int snap_sel_to_curs_exec(bContext *C, wmOperator *op)
+static int snap_selected_to_location(bContext *C, const float 
cursor_global[3], const bool use_offset)
 {
        Scene *scene = CTX_data_scene(C);
        Object *obedit = CTX_data_edit_object(C);
@@ -213,15 +213,10 @@ static int snap_sel_to_curs_exec(bContext *C, wmOperator 
*op)
        TransVertStore tvs = {NULL};
        TransVert *tv;
        float imat[3][3], bmat[3][3];
-       const float *cursor_global;
        float center_global[3];
        float offset_global[3];
        int a;
 
-       const bool use_offset = RNA_boolean_get(op->ptr, "use_offset");
-
-       cursor_global = ED_view3d_cursor3d_get(scene, v3d);
-
        if (use_offset) {
                if ((v3d && v3d->around == V3D_AROUND_ACTIVE) &&
                    snap_calc_active_center(C, true, center_global))
@@ -401,6 +396,18 @@ static int snap_sel_to_curs_exec(bContext *C, wmOperator 
*op)
        return OPERATOR_FINISHED;
 }
 
+static int snap_selected_to_cursor_exec(bContext *C, wmOperator *op)
+{
+       const bool use_offset = RNA_boolean_get(op->ptr, "use_offset");
+
+       Scene *scene = CTX_data_scene(C);
+       View3D *v3d = CTX_wm_view3d(C);
+
+       const float *snap_target_global = ED_view3d_cursor3d_get(scene, v3d);
+
+       return snap_selected_to_location(C, snap_target_global, use_offset);
+}
+
 void VIEW3D_OT_snap_selected_to_cursor(wmOperatorType *ot)
 {
        /* identifiers */
@@ -409,7 +416,7 @@ void VIEW3D_OT_snap_selected_to_cursor(wmOperatorType *ot)
        ot->idname = "VIEW3D_OT_snap_selected_to_cursor";
        
        /* api callbacks */
-       ot->exec = snap_sel_to_curs_exec;
+       ot->exec = snap_selected_to_cursor_exec;
        ot->poll = ED_operator_view3d_active;
        
        /* flags */
@@ -419,6 +426,34 @@ void VIEW3D_OT_snap_selected_to_cursor(wmOperatorType *ot)
        RNA_def_boolean(ot->srna, "use_offset", 1, "Offset", "");
 }
 
+static int snap_selected_to_active_exec(bContext *C, wmOperator *op)
+{
+       const float snap_target_global[3];
+
+       if (snap_calc_active_center(C, false, snap_target_global) == false) {
+               BKE_report(op->reports, RPT_ERROR, "No active element found!");
+               return OPERATOR_CANCELLED;
+       }
+
+       return snap_selected_to_location(C, snap_target_global, false);
+}
+
+void VIEW3D_OT_snap_selected_to_active(wmOperatorType *ot)
+{
+       /* identifiers */
+       ot->name = "Snap Selection to Active";
+       ot->description = "Snap selected item(s) to the active item";
+       ot->idname = "VIEW3D_OT_snap_selected_to_active";
+
+       /* api callbacks */
+       ot->exec = snap_selected_to_active_exec;
+       ot->poll = ED_operator_view3d_active;
+
+       /* flags */
+       ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
+
 /* *************************************************** */
 
 static int snap_curs_to_grid_exec(bContext *C, wmOperator *UNUSED(op))

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