LineArt: Filtering intersection lines using mask numbers

Mask value works just like transparency mask.

You are able to select intersection lines inside a
collection or, between collections.

Reviewed By: Sebastian Parborg (zeddb)

Differential Revision: https://developer.blender.org/D11309

3 files changed, 18 insertions, 9 deletions

diff --git a/source/blender/makesdna/DNA_collection_types.h b/source/blender/makesdna/DNA_collection_types.h
index aa91699ae40..1defa8b782b 100644
--- a/source/blender/makesdna/DNA_collection_types.h
+++ b/source/blender/makesdna/DNA_collection_types.h
@@ -46,9 +46,6 @@ typedef struct CollectionChild {
   struct Collection *collection;
 } CollectionChild;
 
-/**
- * \warning while the values seem to be flags, they aren't treated as flags.
- */
 enum eCollectionLineArt_Usage {
   COLLECTION_LRT_INCLUDE = 0,
   COLLECTION_LRT_OCCLUSION_ONLY = (1 << 0),
@@ -57,6 +54,10 @@ enum eCollectionLineArt_Usage {
   COLLECTION_LRT_NO_INTERSECTION = (1 << 3),
 };
 
+enum eCollectionLineArt_Flags {
+  COLLECTION_LRT_USE_INTERSECTION_MASK = (1 << 0),
+};
+
 typedef struct Collection {
   ID id;
 
@@ -74,8 +75,10 @@ typedef struct Collection {
   /* Runtime-only, always cleared on file load. */
   short tag;
 
-  /** Line Art engine specific */
-  short lineart_usage;
+  short lineart_usage;         /* eCollectionLineArt_Usage */
+  unsigned char lineart_flags; /* eCollectionLineArt_Flags */
+  unsigned char lineart_intersection_mask;
+  char _pad[6];
 
   int16_t color_tag;
 
diff --git a/source/blender/makesdna/DNA_gpencil_modifier_types.h b/source/blender/makesdna/DNA_gpencil_modifier_types.h
index 0bd7e500044..40e4c65c4b8 100644
--- a/source/blender/makesdna/DNA_gpencil_modifier_types.h
+++ b/source/blender/makesdna/DNA_gpencil_modifier_types.h
@@ -883,11 +883,14 @@ typedef enum eLineArtGPencilModifierFlags {
   LRT_GPENCIL_USE_CACHE = (1 << 4),
 } eLineArtGPencilModifierFlags;
 
-typedef enum eLineartGpencilMaterialMaskFlags {
+typedef enum eLineartGpencilMaskSwitches {
   LRT_GPENCIL_MATERIAL_MASK_ENABLE = (1 << 0),
   /** When set, material mask bit comparisons are done with bit wise "AND" instead of "OR". */
   LRT_GPENCIL_MATERIAL_MASK_MATCH = (1 << 1),
-} eLineartGpencilMaterialMaskFlags;
+  LRT_GPENCIL_INTERSECTION_MATCH = (1 << 2),
+} eLineartGpencilMaskSwitches;
+
+struct LineartCache;
 
 struct LineartCache;
 
@@ -918,8 +921,11 @@ typedef struct LineartGpencilModifierData {
   float opacity;
   short thickness;
 
-  unsigned char material_mask_flags; /* eLineartGpencilMaterialMaskFlags */
+  unsigned char mask_switches; /* eLineartGpencilMaskSwitches */
   unsigned char material_mask_bits;
+  unsigned char intersection_mask;
+
+  char _pad[7];
 
   /** `0..1` range for cosine angle */
   float crease_threshold;
diff --git a/source/blender/makesdna/intern/dna_rename_defs.h b/source/blender/makesdna/intern/dna_rename_defs.h
index 57abf708f60..735be0c10bf 100644
--- a/source/blender/makesdna/intern/dna_rename_defs.h
+++ b/source/blender/makesdna/intern/dna_rename_defs.h
@@ -134,6 +134,6 @@ DNA_STRUCT_RENAME_ELEM(RigidBodyWorld, steps_per_second, substeps_per_frame)
  * global_areas. See D9442. */
 DNA_STRUCT_RENAME_ELEM(wmWindow, global_area_map, global_areas)
 DNA_STRUCT_RENAME_ELEM(LineartGpencilModifierData, line_types, edge_types)
-DNA_STRUCT_RENAME_ELEM(LineartGpencilModifierData, transparency_flags, material_mask_flags)
+DNA_STRUCT_RENAME_ELEM(LineartGpencilModifierData, transparency_flags, mask_switches)
 DNA_STRUCT_RENAME_ELEM(LineartGpencilModifierData, transparency_mask, material_mask_bits)
 DNA_STRUCT_RENAME_ELEM(MaterialLineArt, transparency_mask, material_mask_bits)