Fix T69716: Can't select geometry hidden by faces created by modifiers

This kind of reverts rBc060a835 that was committed without discussion.

3 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/draw/engines/select/select_draw_utils.c b/source/blender/draw/engines/select/select_draw_utils.c
index 927956dad19..cac8b5cb304 100644
--- a/source/blender/draw/engines/select/select_draw_utils.c
+++ b/source/blender/draw/engines/select/select_draw_utils.c
@@ -129,7 +129,11 @@ static void draw_select_id_edit_mesh(SELECTID_StorageList *stl,
   }
   else {
     if (ob->dt >= OB_SOLID) {
+#ifdef USE_CAGE_OCCLUSION
+      struct GPUBatch *geom_faces = DRW_mesh_batch_cache_get_triangles_with_select_id(me);
+#else
       struct GPUBatch *geom_faces = DRW_mesh_batch_cache_get_surface(me);
+#endif
       DRWShadingGroup *face_shgrp = stl->g_data->shgrp_face_unif;
       DRW_shgroup_call_no_cull(face_shgrp, geom_faces, ob);
     }
diff --git a/source/blender/draw/engines/select/select_engine.c b/source/blender/draw/engines/select/select_engine.c
index 5dc20a589f0..abfa57dd218 100644
--- a/source/blender/draw/engines/select/select_engine.c
+++ b/source/blender/draw/engines/select/select_engine.c
@@ -252,7 +252,11 @@ static void select_cache_populate(void *vedata, Object *ob)
       DRW_shgroup_call_obmat(stl->g_data->shgrp_depth_only, geom_faces, ob->obmat);
     }
     else if (ob->dt >= OB_SOLID) {
+#ifdef USE_CAGE_OCCLUSION
+      struct GPUBatch *geom_faces = DRW_mesh_batch_cache_get_triangles_with_select_id(me);
+#else
       struct GPUBatch *geom_faces = DRW_mesh_batch_cache_get_surface(me);
+#endif
       DRW_shgroup_call_obmat(stl->g_data->shgrp_depth_only, geom_faces, ob->obmat);
     }
 
diff --git a/source/blender/draw/engines/select/select_private.h b/source/blender/draw/engines/select/select_private.h
index 642cd6ffc56..1e99a49252e 100644
--- a/source/blender/draw/engines/select/select_private.h
+++ b/source/blender/draw/engines/select/select_private.h
@@ -23,6 +23,8 @@
 #ifndef __SELECT_PRIVATE_H__
 #define __SELECT_PRIVATE_H__
 
+#define USE_CAGE_OCCLUSION
+
 #include "DRW_render.h"
 
 /* GPUViewport.storage