Create vertex_animation_notes.md

vertex_animation_notes.md

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+- The alembic format serves as a good way to bake mesh data with lots of modifiers
+- This script will convert mesh animations to shapekeys. Digusting, but it just might work
+- https://gist.github.com/fire/495fb6a35168500df53c002695a1f5fe
+Code reproduced below for archival purposes
+
+- Enable the .mdd addon in blender to export as a mesh cache
+- It might work as a direct export to .mdd, but I did alembic first, then rexported to mdd
+- Create new object with same mesh and empty modifier stack and add a mesh cache modifier to load exported file.
+
+
+```
+
+# MIT LICENSE
+# Authored by iFire#6518 and alexfreyre#1663
+# This code ONLY apply to a mesh and simulations with ONLY the same vertex number
+
+import bpy
+
+#Converts a MeshCache or Cloth modifiers to ShapeKeys
+frame = bpy.context.scene.frame_start
+for frame in range(bpy.context.scene.frame_end + 1):
+    bpy.context.scene.frame_current = frame
+
+    #for alembic files converted to MDD and loaded as MeshCache
+    bpy.ops.object.modifier_apply_as_shapekey(keep_modifier=True, modifier="MeshCache")
+
+    #for cloth simulations inside blender using a Cloth modifier
+    #bpy.ops.object.modifier_apply_as_shapekey(keep_modifier=True, modifier="Cloth")
+
+# loop through shapekeys and add as keyframe per frame
+# https://blender.stackexchange.com/q/149045/87258
+frame = bpy.context.scene.frame_start
+for frame in range(bpy.context.scene.frame_end + 1):
+    bpy.context.scene.frame_current = frame
+
+    for shapekey in bpy.data.shape_keys:
+        for i, keyblock in enumerate(shapekey.key_blocks):
+            if keyblock.name != "Basis":
+                curr = i - 1
+                if curr != frame:
+                    keyblock.value = 0
+                    keyblock.keyframe_insert("value", frame=frame)
+                else:
+                    keyblock.value = 1
+                    keyblock.keyframe_insert("value", frame=frame)
+
+# bpy.ops.object.modifier_remove(modifier="MeshCache")
+# bpy.ops.object.modifier_remove(modifier="Cloth")
+```
+
+