LineArt: Automatic crease with flat/smooth faces.

This allows crease lines to be automatically hidden on smooth surfaces, also provided options for:

- Showing crease on marked sharp edges.
- Force crease detection on smooth surfaces.

Reviewed By: Antonio Vazquez (antoniov)

Differential Revision: http://developer.blender.org/D12051

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 6b8f011e9fc..4eba9f5f42e 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -37,6 +37,8 @@
 #include "DNA_constraint_types.h"
 #include "DNA_curve_types.h"
 #include "DNA_genfile.h"
+#include "DNA_gpencil_modifier_types.h"
+#include "DNA_lineart_types.h"
 #include "DNA_listBase.h"
 #include "DNA_material_types.h"
 #include "DNA_modifier_types.h"
@@ -1225,6 +1227,19 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
         version_geometry_nodes_change_legacy_names(ntree);
       }
     }
+    if (!DNA_struct_elem_find(
+            fd->filesdna, "LineartGpencilModifierData", "bool", "use_crease_on_smooth")) {
+      LISTBASE_FOREACH (Object *, ob, &bmain->objects) {
+        if (ob->type == OB_GPENCIL) {
+          LISTBASE_FOREACH (GpencilModifierData *, md, &ob->greasepencil_modifiers) {
+            if (md->type == eGpencilModifierType_Lineart) {
+              LineartGpencilModifierData *lmd = (LineartGpencilModifierData *)md;
+              lmd->calculation_flags |= LRT_USE_CREASE_ON_SMOOTH_SURFACES;
+            }
+          }
+        }
+      }
+    }
   }
 
   /**