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Jan 14th, 2020
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  1. def set_transform_from_matrix(obj, bone_name, matrix, *, space='POSE', undo_copy_scale=False, ignore_locks=False, no_loc=False, no_rot=False, no_scale=False, keyflags=None):
  2.     "Apply the matrix to the transformation of the bone, taking locked channels, mode and certain constraints into account, and optionally keyframe it."
  3.     bone = obj.pose.bones[bone_name]
  4.  
  5.     def restore_channels(prop, old_vec, locks, extra_lock):
  6.         if extra_lock or (not ignore_locks and all(locks)):
  7.             setattr(bone, prop, old_vec)
  8.         else:
  9.             if not ignore_locks and any(locks):
  10.                 new_vec = Vector(getattr(bone, prop))
  11.  
  12.                 for i, lock in enumerate(locks):
  13.                     if lock:
  14.                         new_vec[i] = old_vec[i]
  15.  
  16.                 setattr(bone, prop, new_vec)
  17.  
  18.     # Save the old values of the properties
  19.     old_loc = Vector(bone.location)
  20.     old_rot_euler = Vector(bone.rotation_euler)
  21.     old_rot_quat = Vector(bone.rotation_quaternion)
  22.     old_rot_axis = Vector(bone.rotation_axis_angle)
  23.     old_scale = Vector(bone.scale)
  24.  
  25.     # Compute and assign the local matrix
  26.     if space != 'LOCAL':
  27.         matrix = obj.convert_space(pose_bone=bone, matrix=matrix, from_space=space, to_space='LOCAL')
  28.  
  29.     if undo_copy_scale:
  30.         matrix = undo_copy_scale_constraints(obj, bone, matrix)
  31.  
  32.     bone.matrix_basis = matrix
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