Main shape key implementation for cached strand data.

This includes storage of the shape keys in a `Key` instance in the
modifier data, and accompanying operators for adding, removing, moving,
etc. shape keys, as well as the necessary UI code.

2 files changed, 16 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 62ac46166d1..1057f840d22 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -2005,6 +2005,16 @@ static void lib_link_cache_modifiers(FileData *fd, CacheLibrary *cachelib)
 	CacheModifier *md;
 	for (md = cachelib->modifiers.first; md; md = md->next) {
 		BKE_cache_modifier_foreachIDLink(cachelib, md, lib_link_cache_modifiers_cb, fd);
+		
+		/* special cases */
+		switch (md->type) {
+			case eCacheModifierType_StrandsKey: {
+				StrandsKeyCacheModifier *skmd = (StrandsKeyCacheModifier *)md;
+				/* Key is a local ID block, not handled by foreachIDLink */
+				skmd->key = newlibadr(fd, cachelib->id.lib, skmd->key);
+				break;
+			}
+		}
 	}
 }
 
diff --git a/source/blender/blenloader/intern/writefile.c b/source/blender/blenloader/intern/writefile.c
index 6210eee919a..74eed665472 100644
--- a/source/blender/blenloader/intern/writefile.c
+++ b/source/blender/blenloader/intern/writefile.c
@@ -3548,6 +3548,12 @@ static void write_cache_modifiers(WriteData *wd, CacheLibrary *cachelib)
 					write_curvemapping(wd, hsmd->sim_params.goal_stiffness_mapping);
 				break;
 			}
+			case eCacheModifierType_StrandsKey: {
+				StrandsKeyCacheModifier *skmd = (StrandsKeyCacheModifier *)md;
+				/* Key is a local ID block */
+				writestruct(wd, DATA, "Key", 1, skmd->key);
+				break;
+			}
 		}
 	}
 }