LineArt: Shadow and related functionalities.

This patch includes the full shadow functionality for LineArt:

- Light contour and cast shadow lines.
- Lit/shaded region selection.
- Enclosed light/shadow shape calculation.
- Silhouette/anti-silhouette selection.
- Intersection priority based on shadow edge identifier.

Reviewed By: Sebastian Parborg (zeddb)

Differential Revision: https://developer.blender.org/D15109

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/gpencil_modifier.c b/source/blender/blenkernel/intern/gpencil_modifier.c
index 0bf5418ea8f..8739f2f7082 100644
--- a/source/blender/blenkernel/intern/gpencil_modifier.c
+++ b/source/blender/blenkernel/intern/gpencil_modifier.c
@@ -221,6 +221,9 @@ GpencilLineartLimitInfo BKE_gpencil_get_lineart_modifier_limits(const Object *ob
         info.max_level = MAX2(info.max_level,
                               (lmd->use_multiple_levels ? lmd->level_end : lmd->level_start));
         info.edge_types |= lmd->edge_types;
+        info.shadow_selection = MAX2(lmd->shadow_selection, info.shadow_selection);
+        info.silhouette_selection = MAX2(lmd->silhouette_selection, info.silhouette_selection);
+        is_first = false;
       }
     }
   }
@@ -237,11 +240,15 @@ void BKE_gpencil_set_lineart_modifier_limits(GpencilModifierData *md,
     lmd->level_start_override = info->min_level;
     lmd->level_end_override = info->max_level;
     lmd->edge_types_override = info->edge_types;
+    lmd->shadow_selection_override = info->shadow_selection;
+    lmd->shadow_use_silhouette_override = info->silhouette_selection;
   }
   else {
     lmd->level_start_override = lmd->level_start;
     lmd->level_end_override = lmd->level_end;
     lmd->edge_types_override = lmd->edge_types;
+    lmd->shadow_selection_override = lmd->shadow_selection;
+    lmd->shadow_use_silhouette_override = lmd->silhouette_selection;
   }
 }