Last active
October 9, 2023 02:27
-
-
Save matty/7942fc4d0b5c4346f6f4a129167257f5 to your computer and use it in GitHub Desktop.
Remove non-driven shape keys for Blender 3+
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| bl_info = { | |
| "name": "Remove Non-driven Shape Keys", | |
| "description": "Removes any Shape Key which doesn't affect any vertices within tolerance.", | |
| "version": (1, 0), | |
| "blender": (3, 0, 0), | |
| "category": "Object", | |
| } | |
| import bpy | |
| import numpy as np | |
| def main_function(self, context): | |
| # Tolerance to small differences, change it if you want | |
| tolerance = 0.001 | |
| assert bpy.context.mode == 'OBJECT', "Must be in object mode!" | |
| for ob in bpy.context.selected_objects: | |
| if ob.type != 'MESH': continue | |
| if not ob.data.shape_keys: continue | |
| if not ob.data.shape_keys.use_relative: continue | |
| kbs = ob.data.shape_keys.key_blocks | |
| nverts = len(ob.data.vertices) | |
| to_delete = [] | |
| # Cache locs for rel keys since many keys have the same rel key | |
| cache = {} | |
| locs = np.empty(3*nverts, dtype=np.float32) | |
| for kb in kbs: | |
| if kb == kb.relative_key: continue | |
| kb.data.foreach_get("co", locs) | |
| if kb.relative_key.name not in cache: | |
| rel_locs = np.empty(3*nverts, dtype=np.float32) | |
| kb.relative_key.data.foreach_get("co", rel_locs) | |
| cache[kb.relative_key.name] = rel_locs | |
| rel_locs = cache[kb.relative_key.name] | |
| locs -= rel_locs | |
| if (np.abs(locs) < tolerance).all(): | |
| to_delete.append(kb.name) | |
| for kb_name in to_delete: | |
| ob.shape_key_remove(ob.data.shape_keys.key_blocks[kb_name]) | |
| def draw_func(self, context): | |
| layout = self.layout | |
| obj = context.active_object | |
| row = layout.row() | |
| row.operator("object.remove_nondriven_shapekeys", text="Remove non-driven Shape Keys") | |
| def register(): | |
| bpy.types.DATA_PT_shape_keys.append(draw_func) | |
| bpy.utils.register_class(RemoveNonDrivenShapeKeysOperator) | |
| def unregister(): | |
| bpy.types.DATA_PT_shape_keys.remove(draw_func) | |
| bpy.utils.unregister_class(RemoveNonDrivenShapeKeysOperator) | |
| class RemoveNonDrivenShapeKeysOperator(bpy.types.Operator): | |
| bl_idname = "object.remove_nondriven_shapekeys" | |
| bl_label = "Remove non-driven Shape Keys" | |
| def execute(self, context): | |
| main_function(self, context) | |
| return {'FINISHED'} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment