commit of transform pinning patch by Fabian Fricke (frigi). wip hotkey is enter/alt-enter to pin/unpin verts. pinned verts aren't affected by transform, e.g. grab, rotate, etc. this could probably work nicer for proportional editing, but that can be done later. also the UI for this probably needs reviewing and feedback. still, very nice patch by Fabian, something I for one will probably find very useful :)

3 files changed, 133 insertions, 0 deletions

diff --git a/source/blender/editors/mesh/bmesh_tools.c b/source/blender/editors/mesh/bmesh_tools.c
index 990198c9216..e02707c7a67 100644
--- a/source/blender/editors/mesh/bmesh_tools.c
+++ b/source/blender/editors/mesh/bmesh_tools.c
@@ -1703,6 +1703,127 @@ void MESH_OT_edge_rotate(wmOperatorType *ot)
 	RNA_def_enum(ot->srna, "direction", direction_items, DIRECTION_CW, "direction", "direction to rotate edge around.");
 }
 
+/* pinning code */
+
+/* swap is 0 or 1, if 1 it pins not selected */
+void EDBM_pin_mesh(BMEditMesh *em, int swap)
+{
+	BMIter iter;
+	BMHeader *h;
+	int itermode;
+
+	if(em==NULL) return;
+	
+	if (em->selectmode & SCE_SELECT_VERTEX)
+		itermode = BM_VERTS_OF_MESH;
+	else if (em->selectmode & SCE_SELECT_EDGE)
+		itermode = BM_EDGES_OF_MESH;
+	else
+		itermode = BM_FACES_OF_MESH;
+
+	BM_ITER(h, &iter, em->bm, itermode, NULL) {
+		if (BM_TestHFlag(h, BM_SELECT) ^ swap)
+			BM_Pin(em->bm, h, 1);
+	}
+
+	EDBM_selectmode_flush(em);
+}
+
+static int pin_mesh_exec(bContext *C, wmOperator *op)
+{
+	Object *obedit= CTX_data_edit_object(C);
+	Scene *scene = CTX_data_scene(C);
+	BMEditMesh *em= (((Mesh *)obedit->data))->edit_btmesh;
+	Mesh *me= ((Mesh *)obedit->data);
+
+	me->drawflag |= ME_DRAW_PINS;
+	
+	EDBM_pin_mesh(em, RNA_boolean_get(op->ptr, "unselected"));
+		
+	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
+	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);	
+
+	return OPERATOR_FINISHED;	
+}
+
+void MESH_OT_pin(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Pin Selection";
+	ot->idname= "MESH_OT_pin";
+	
+	/* api callbacks */
+	ot->exec= pin_mesh_exec;
+	ot->poll= ED_operator_editmesh;
+	ot->description= "Pin (un)selected vertices, edges or faces.";
+
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+	
+	/* props */
+	RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Pin unselected rather than selected.");
+}
+
+/* swap is 0 or 1, if 1 it unhides not selected */
+void EDBM_unpin_mesh(BMEditMesh *em, int swap)
+{
+	BMIter iter;
+	BMHeader *ele;
+	int i, types[3] = {BM_VERTS_OF_MESH, BM_EDGES_OF_MESH, BM_FACES_OF_MESH};
+	int sels[3] = {1, !(em->selectmode & SCE_SELECT_VERTEX), !(em->selectmode & SCE_SELECT_VERTEX | SCE_SELECT_EDGE)};
+	int itermode;
+	
+	if(em==NULL) return;
+	
+	if (em->selectmode & SCE_SELECT_VERTEX)
+		itermode = BM_VERTS_OF_MESH;
+	else if (em->selectmode & SCE_SELECT_EDGE)
+		itermode = BM_EDGES_OF_MESH;
+	else
+		itermode = BM_FACES_OF_MESH;
+
+	BM_ITER(ele, &iter, em->bm, itermode, NULL) {
+		if (BM_TestHFlag(ele, BM_SELECT) ^ swap)
+			BM_Pin(em->bm, ele, 0);
+	}
+
+	EDBM_selectmode_flush(em);
+}
+
+static int unpin_mesh_exec(bContext *C, wmOperator *op)
+{
+	Object *obedit= CTX_data_edit_object(C);
+	Scene *scene = CTX_data_scene(C);
+	BMEditMesh *em= (((Mesh *)obedit->data))->edit_btmesh;
+	Mesh *me= ((Mesh *)obedit->data);
+	
+	EDBM_unpin_mesh(em, RNA_boolean_get(op->ptr, "unselected"));
+
+	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
+	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);	
+
+	return OPERATOR_FINISHED;	
+}
+
+void MESH_OT_unpin(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Unpin Selection";
+	ot->idname= "MESH_OT_unpin";
+	ot->description= "Unpin (un)selected vertices, edges or faces.";
+	
+	/* api callbacks */
+	ot->exec= unpin_mesh_exec;
+	ot->poll= ED_operator_editmesh;
+	
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+
+	/* props */
+	RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Unpin unselected rather than selected.");
+}
+
+
 /* swap is 0 or 1, if 1 it hides not selected */
 void EDBM_hide_mesh(BMEditMesh *em, int swap)
 {
diff --git a/source/blender/editors/mesh/mesh_intern.h b/source/blender/editors/mesh/mesh_intern.h
index 0c2131e8098..37803d4c00a 100644
--- a/source/blender/editors/mesh/mesh_intern.h
+++ b/source/blender/editors/mesh/mesh_intern.h
@@ -205,6 +205,8 @@ void MESH_OT_select_inverse(struct wmOperatorType *ot);
 void MESH_OT_select_non_manifold(struct wmOperatorType *ot);
 void MESH_OT_select_linked(struct wmOperatorType *ot);
 void MESH_OT_select_linked_pick(struct wmOperatorType *ot);
+void MESH_OT_pin(struct wmOperatorType *ot);
+void MESH_OT_unpin(struct wmOperatorType *ot);
 void MESH_OT_hide(struct wmOperatorType *ot);
 void MESH_OT_reveal(struct wmOperatorType *ot);
 void MESH_OT_select_by_number_vertices(struct wmOperatorType *ot);
diff --git a/source/blender/editors/mesh/mesh_ops.c b/source/blender/editors/mesh/mesh_ops.c
index 1498f3573f1..9570ae16a4b 100644
--- a/source/blender/editors/mesh/mesh_ops.c
+++ b/source/blender/editors/mesh/mesh_ops.c
@@ -204,6 +204,8 @@ static int specials_invoke(bContext *C, wmOperator *op, wmEvent *event)
 	uiItemO(layout, "Remove Doubles", 0, "MESH_OT_remove_doubles");
 	uiItemO(layout, "Hide", 0, "MESH_OT_hide");
 	uiItemO(layout, "Reveal", 0, "MESH_OT_reveal");
+	uiItemO(layout, "Pin", 0, "MESH_OT_pin");
+	uiItemO(layout, "Unpin", 0, "MESH_OT_unpin");
 	uiItemO(layout, "Select Inverse", 0, "MESH_OT_select_inverse");
 	uiItemO(layout, NULL, 0, "MESH_OT_flip_normals");
 	uiItemO(layout, "Smooth", 0, "MESH_OT_vertices_smooth");
@@ -248,6 +250,8 @@ void ED_operatortypes_mesh(void)
 	WM_operatortype_append(MESH_OT_select_linked_pick);
 	WM_operatortype_append(MESH_OT_select_random);
 	WM_operatortype_append(MESH_OT_selection_type);
+	WM_operatortype_append(MESH_OT_pin);
+	WM_operatortype_append(MESH_OT_unpin);
 	WM_operatortype_append(MESH_OT_hide);
 	WM_operatortype_append(MESH_OT_reveal);
 	WM_operatortype_append(MESH_OT_select_by_number_vertices);
@@ -396,6 +400,12 @@ void ED_keymap_mesh(wmWindowManager *wm)
 	/* selection mode */
 	WM_keymap_add_item(keymap, "MESH_OT_selection_type", TABKEY, KM_PRESS, KM_CTRL, 0);
 	
+	/* pin */
+	WM_keymap_add_item(keymap, "MESH_OT_pin", RETKEY, KM_PRESS, 0, 0);
+	RNA_boolean_set(WM_keymap_add_item(keymap, "MESH_OT_pin", RETKEY, KM_PRESS, KM_SHIFT, 0)->ptr, "unselected", 1);
+	WM_keymap_add_item(keymap, "MESH_OT_unpin", RETKEY, KM_PRESS, KM_ALT, 0);
+	RNA_boolean_set(WM_keymap_add_item(keymap, "MESH_OT_unpin", RETKEY, KM_PRESS, KM_SHIFT | KM_ALT, 0)->ptr, "unselected", 1);
+
 	/* hide */
 	WM_keymap_add_item(keymap, "MESH_OT_hide", HKEY, KM_PRESS, 0, 0);
 	RNA_boolean_set(WM_keymap_add_item(keymap, "MESH_OT_hide", HKEY, KM_PRESS, KM_SHIFT, 0)->ptr, "unselected", 1);