[Bf-blender-cvs] [9189fd643a2] blender2.8: Gizmo: fix extrude depth ordering

[Campbell Barton]

Commit: 9189fd643a2e00e164db21b46d637713b7251518
Author: Campbell Barton
Date:   Sat Sep 8 12:30:36 2018 +1000
Branches: blender2.8
https://developer.blender.org/rB9189fd643a2e00e164db21b46d637713b7251518

Gizmo: fix extrude depth ordering

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

M	source/blender/editors/mesh/editmesh_extrude.c

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

diff --git a/source/blender/editors/mesh/editmesh_extrude.c b/source/blender/editors/mesh/editmesh_extrude.c
index e763a14f3d8..6bcf91038e9 100644
--- a/source/blender/editors/mesh/editmesh_extrude.c
+++ b/source/blender/editors/mesh/editmesh_extrude.c
@@ -623,6 +623,15 @@ static void gizmo_mesh_extrude_refresh(const bContext *C, wmGizmoGroup *gzgroup)
 	}
 }
 
+static int gizmo_cmp_temp_f(const void *gz_a_ptr, const void *gz_b_ptr)
+{
+	const wmGizmo *gz_a = gz_a_ptr;
+	const wmGizmo *gz_b = gz_b_ptr;
+	if      (gz_a->temp.f < gz_b->temp.f) return -1;
+	else if (gz_a->temp.f > gz_b->temp.f) return  1;
+	else                                  return  0;
+}
+
 static void gizmo_mesh_extrude_draw_prepare(const bContext *C, wmGizmoGroup *gzgroup)
 {
 	GizmoExtrudeGroup *man = gzgroup->customdata;
@@ -637,6 +646,15 @@ static void gizmo_mesh_extrude_draw_prepare(const bContext *C, wmGizmoGroup *gzg
 			break;
 		}
 	}
+
+	/* Basic ordering for drawing only. */
+	{
+		RegionView3D *rv3d = CTX_wm_region_view3d(C);
+		LISTBASE_FOREACH (wmGizmo *, gz, &gzgroup->gizmos) {
+			gz->temp.f = dot_v3v3(rv3d->viewinv[2], gz->matrix_offset[3]);
+		}
+		BLI_listbase_sort(&gzgroup->gizmos, gizmo_cmp_temp_f);
+	}
 }
 
 static void gizmo_mesh_extrude_message_subscribe(