Tool System: use preselect highlight w/ poly-build

- Poly build now uses a new gizmo for pre-selection
  which has the same behavior as loop-cut.

  This replaces hack where mouse-move set the active element
  which was no longer working properly because of missing
  depsgraph updates.

- Multi-object support for poly-build.

- Support for deformed cage.

- Fix error where changing active object wasn't properly
  refreshing the preselect gizmo (for loopcut too).

Currently holding Alt to select non-boundary element's isn't working.

1 files changed, 19 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_mesh.h b/source/blender/editors/include/ED_mesh.h
index c084033bbb6..92338aa508f 100644
--- a/source/blender/editors/include/ED_mesh.h
+++ b/source/blender/editors/include/ED_mesh.h
@@ -52,6 +52,7 @@ struct Mesh;
 struct UvVertMap;
 struct UvMapVert;
 struct BMEditMesh;
+struct BMElem;
 struct BMesh;
 struct BMVert;
 struct BMLoop;
@@ -177,6 +178,14 @@ bool EDBM_unified_findnearest(
         struct BMEdge **r_eed,
         struct BMFace **r_efa);
 
+bool EDBM_unified_findnearest_from_raycast(
+        struct ViewContext *vc,
+        bool use_boundary,
+        struct Base **r_base,
+        struct BMVert **r_eve,
+        struct BMEdge **r_eed,
+        struct BMFace **r_efa);
+
 bool EDBM_select_pick(struct bContext *C, const int mval[2], bool extend, bool deselect, bool toggle);
 
 void EDBM_selectmode_set(struct BMEditMesh *em);
@@ -210,6 +219,16 @@ void EDBM_preselect_edgering_update_from_edge(
         struct EditMesh_PreSelEdgeRing *psel,
         struct BMesh *bm, struct BMEdge *eed_start, int previewlines, const float (*coords)[3]);
 
+/* editmesh_preselect_elem.c */
+struct EditMesh_PreSelElem;
+struct EditMesh_PreSelElem *EDBM_preselect_elem_create(void);
+void EDBM_preselect_elem_destroy(struct EditMesh_PreSelElem *psel);
+void EDBM_preselect_elem_clear(struct EditMesh_PreSelElem *psel);
+void EDBM_preselect_elem_draw(struct EditMesh_PreSelElem *psel, const float matrix[4][4]);
+void EDBM_preselect_elem_update_from_single(
+        struct EditMesh_PreSelElem *psel,
+        struct BMesh *bm, struct BMElem *ele, const float (*coords)[3]);
+
 /* mesh_ops.c */
 void        ED_operatortypes_mesh(void);
 void        ED_operatormacros_mesh(void);