[Bf-blender-cvs] [50cb9b52bb1] blender2.8: Multires: Implement function to get mesh at multires position of stack

[Sergey Sharybin]

Commit: 50cb9b52bb13d6805c9ffdf39f84d0af7592160b
Author: Sergey Sharybin
Date:   Thu Aug 16 13:00:24 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB50cb9b52bb13d6805c9ffdf39f84d0af7592160b

Multires: Implement function to get mesh at multires position of stack

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

M	source/blender/blenkernel/BKE_multires.h
M	source/blender/blenkernel/intern/multires.c

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

diff --git a/source/blender/blenkernel/BKE_multires.h b/source/blender/blenkernel/BKE_multires.h
index 0a547936a39..71997e55b66 100644
--- a/source/blender/blenkernel/BKE_multires.h
+++ b/source/blender/blenkernel/BKE_multires.h
@@ -86,6 +86,9 @@ int multires_get_level(struct Scene *scene, struct Object *ob, const struct Mult
                        bool render, bool ignore_simplify);
 struct DerivedMesh *get_multires_dm(struct Depsgraph *depsgraph, struct Scene *scene, struct MultiresModifierData *mmd,
                                     struct Object *ob);
+struct Mesh *get_multires_mesh(
+        struct Depsgraph *depsgraph, struct Scene *scene,
+        struct MultiresModifierData *mmd, struct Object *ob);
 void multiresModifier_del_levels(struct MultiresModifierData *mmd, struct Scene *scene, struct Object *object, int direction);
 void multiresModifier_base_apply(struct MultiresModifierData *mmd, struct Scene *scene, struct Object *ob);
 void multiresModifier_subdivide(struct MultiresModifierData *mmd, struct Scene *scene, struct Object *ob, int updateblock, int simple);
diff --git a/source/blender/blenkernel/intern/multires.c b/source/blender/blenkernel/intern/multires.c
index b4fd93afba1..bd6c30606f4 100644
--- a/source/blender/blenkernel/intern/multires.c
+++ b/source/blender/blenkernel/intern/multires.c
@@ -49,6 +49,7 @@
 #include "BKE_pbvh.h"
 #include "BKE_ccg.h"
 #include "BKE_cdderivedmesh.h"
+#include "BKE_library.h"
 #include "BKE_mesh.h"
 #include "BKE_mesh_mapping.h"
 #include "BKE_mesh_runtime.h"
@@ -293,6 +294,30 @@ DerivedMesh *get_multires_dm(struct Depsgraph *depsgraph, Scene *scene, Multires
 	return dm;
 }
 
+Mesh *get_multires_mesh(
+        struct Depsgraph *depsgraph,
+        Scene *scene,
+        MultiresModifierData *mmd,
+        Object *ob)
+{
+	Mesh *deformed_mesh = mesh_get_eval_deform(depsgraph, scene, ob, CD_MASK_BAREMESH);
+	ModifierEvalContext modifier_ctx = {
+	        .depsgraph = depsgraph,
+	        .object = ob,
+	        .flag = MOD_APPLY_USECACHE | MOD_APPLY_IGNORE_SIMPLIFY};
+	Mesh *result = modifier_applyModifier(&mmd->modifier, &modifier_ctx, deformed_mesh);
+	if (result == deformed_mesh) {
+		/* TODO(sergey): De-duplicate with copy in modifier stack. */
+		BKE_id_copy_ex(NULL, &deformed_mesh->id, (ID **)&result,
+		               (LIB_ID_CREATE_NO_MAIN |
+		                LIB_ID_CREATE_NO_USER_REFCOUNT |
+		                LIB_ID_CREATE_NO_DEG_TAG |
+		                LIB_ID_COPY_CD_REFERENCE),
+		               false);
+	}
+	return result;
+}
+
 MultiresModifierData *find_multires_modifier_before(Scene *scene, ModifierData *lastmd)
 {
 	ModifierData *md;