BMesh: edge-offset feature (Ctrl+Shift+R)

Ability to quickly add 2x edge loops  on either side of selected loops.

3 files changed, 62 insertions, 1 deletions

diff --git a/source/blender/editors/mesh/editmesh_tools.c b/source/blender/editors/mesh/editmesh_tools.c
index 62aec788306..202ce8d68a6 100644
--- a/source/blender/editors/mesh/editmesh_tools.c
+++ b/source/blender/editors/mesh/editmesh_tools.c
@@ -5181,6 +5181,57 @@ void MESH_OT_wireframe(wmOperatorType *ot)
 	RNA_def_property_ui_range(prop, 0.0, 1.0, 0.1, 2);
 }
 
+static int edbm_offset_edgeloop_exec(bContext *C, wmOperator *op)
+{
+	Object *obedit = CTX_data_edit_object(C);
+	BMEditMesh *em = BKE_editmesh_from_object(obedit);
+	BMOperator bmop;
+
+	EDBM_op_init(
+	        em, &bmop, op,
+	        "offset_edgeloops edges=%he",
+	        BM_ELEM_SELECT);
+
+	BMO_op_exec(em->bm, &bmop);
+
+	BM_mesh_elem_hflag_disable_all(em->bm, BM_VERT | BM_EDGE | BM_FACE, BM_ELEM_SELECT, false);
+
+	/* If in face-only select mode, switch to edge select mode so that
+	 * an edge-only selection is not inconsistent state */
+	if (em->selectmode == SCE_SELECT_FACE) {
+		em->selectmode = SCE_SELECT_EDGE;
+		EDBM_selectmode_set(em);
+		EDBM_selectmode_to_scene(C);
+	}
+
+	BMO_slot_buffer_hflag_enable(em->bm, bmop.slots_out, "edges.out", BM_EDGE, BM_ELEM_SELECT, true);
+
+	if (!EDBM_op_finish(em, &bmop, op, true)) {
+		return OPERATOR_CANCELLED;
+	}
+	else {
+		EDBM_update_generic(em, true, true);
+		return OPERATOR_FINISHED;
+	}
+}
+
+void MESH_OT_offset_edge_loops(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Offset Edge Loop";
+	ot->idname = "MESH_OT_offset_edge_loops";
+	ot->description = "Creates offset edge loop from the current selection";
+
+	/* api callbacks */
+	ot->exec = edbm_offset_edgeloop_exec;
+	ot->poll = ED_operator_editmesh;
+
+	/* Keep internal, since this is only meant to be accessed via 'MESH_OT_offset_edge_loops_slide' */
+
+	/* flags */
+	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO | OPTYPE_INTERNAL;
+}
+
 #ifdef WITH_BULLET
 static int edbm_convex_hull_exec(bContext *C, wmOperator *op)
 {
diff --git a/source/blender/editors/mesh/mesh_intern.h b/source/blender/editors/mesh/mesh_intern.h
index 8c44d5a7b3f..c56465f570a 100644
--- a/source/blender/editors/mesh/mesh_intern.h
+++ b/source/blender/editors/mesh/mesh_intern.h
@@ -176,6 +176,7 @@ void MESH_OT_vert_connect_nonplanar(struct wmOperatorType *ot);
 void MESH_OT_face_make_planar(struct wmOperatorType *ot);
 void MESH_OT_edge_split(struct wmOperatorType *ot);
 void MESH_OT_bridge_edge_loops(struct wmOperatorType *ot);
+void MESH_OT_offset_edge_loops(struct wmOperatorType *ot);
 void MESH_OT_wireframe(struct wmOperatorType *ot);
 void MESH_OT_convex_hull(struct wmOperatorType *ot);
 void MESH_OT_symmetrize(struct wmOperatorType *ot);
diff --git a/source/blender/editors/mesh/mesh_ops.c b/source/blender/editors/mesh/mesh_ops.c
index 20f222bf425..9718e63f012 100644
--- a/source/blender/editors/mesh/mesh_ops.c
+++ b/source/blender/editors/mesh/mesh_ops.c
@@ -177,6 +177,7 @@ void ED_operatortypes_mesh(void)
 
 	WM_operatortype_append(MESH_OT_bridge_edge_loops);
 	WM_operatortype_append(MESH_OT_inset);
+	WM_operatortype_append(MESH_OT_offset_edge_loops);
 	WM_operatortype_append(MESH_OT_intersect);
 	WM_operatortype_append(MESH_OT_face_split_by_edges);
 	WM_operatortype_append(MESH_OT_poke);
@@ -225,6 +226,13 @@ void ED_operatormacros_mesh(void)
 	otmacro = WM_operatortype_macro_define(ot, "TRANSFORM_OT_edge_slide");
 	RNA_boolean_set(otmacro->ptr, "release_confirm", false);
 
+	ot = WM_operatortype_append_macro("MESH_OT_offset_edge_loops_slide", "Offset Edge Slide", "Offset edge loop slide",
+	                                  OPTYPE_UNDO | OPTYPE_REGISTER);
+	WM_operatortype_macro_define(ot, "MESH_OT_offset_edge_loops");
+	otmacro = WM_operatortype_macro_define(ot, "TRANSFORM_OT_edge_slide");
+	RNA_boolean_set(otmacro->ptr, "release_confirm", false);
+	RNA_boolean_set(otmacro->ptr, "single_side", true);
+
 	ot = WM_operatortype_append_macro("MESH_OT_duplicate_move", "Add Duplicate", "Duplicate mesh and move",
 	                                  OPTYPE_UNDO | OPTYPE_REGISTER);
 	WM_operatortype_macro_define(ot, "MESH_OT_duplicate");
@@ -302,7 +310,8 @@ void ED_keymap_mesh(wmKeyConfig *keyconf)
 	keymap = WM_keymap_find(keyconf, "Mesh", 0, 0);
 	keymap->poll = ED_operator_editmesh;
 	
-	WM_keymap_add_item(keymap, "MESH_OT_loopcut_slide", RKEY, KM_PRESS, KM_CTRL, 0);	
+	WM_keymap_add_item(keymap, "MESH_OT_loopcut_slide", RKEY, KM_PRESS, KM_CTRL, 0);
+	WM_keymap_add_item(keymap, "MESH_OT_offset_edge_loops_slide", RKEY, KM_PRESS, KM_CTRL | KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "MESH_OT_inset", IKEY, KM_PRESS, 0, 0);
 	WM_keymap_add_item(keymap, "MESH_OT_poke", PKEY, KM_PRESS, KM_ALT, 0);
 	kmi = WM_keymap_add_item(keymap, "MESH_OT_bevel", BKEY, KM_PRESS, KM_CTRL, 0);