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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8 compliant>
from math import *
import bpy
from mathutils import *
def main(context):
def cleanupEulCurve(fcv):
keys = []
for k in fcv.keyframe_points:
keys.append([k.handle_left.copy(), k.co.copy(), k.handle_right.copy()])
print(keys)
for i in range(len(keys)):
cur = keys[i]
prev = keys[i - 1] if i > 0 else None
next = keys[i + 1] if i < len(keys) - 1 else None
if prev is None:
continue
th = pi
if abs(prev[1][1] - cur[1][1]) >= th: # more than 180 degree jump
fac = pi * 2.0
if prev[1][1] > cur[1][1]:
while abs(cur[1][1] - prev[1][1]) >= th: # < prev[1][1]:
cur[0][1] += fac
cur[1][1] += fac
cur[2][1] += fac
elif prev[1][1] < cur[1][1]:
while abs(cur[1][1] - prev[1][1]) >= th:
cur[0][1] -= fac
cur[1][1] -= fac
cur[2][1] -= fac
for i in range(len(keys)):
for x in range(2):
fcv.keyframe_points[i].handle_left[x] = keys[i][0][x]
fcv.keyframe_points[i].co[x] = keys[i][1][x]
fcv.keyframe_points[i].handle_right[x] = keys[i][2][x]
flist = bpy.context.active_object.animation_data.action.fcurves
for f in flist:
if f.select and f.data_path.endswith("rotation_euler"):
cleanupEulCurve(f)
class DiscontFilterOp(bpy.types.Operator):
"""Fixes the most common causes of gimbal lock in the fcurves of the active bone"""
bl_idname = "graph.euler_filter"
bl_label = "Filter out discontinuities in the active fcurves"
@classmethod
def poll(cls, context):
return context.active_object != None
def execute(self, context):
main(context)
return {'FINISHED'}
def register():
bpy.utils.register_module(__name__)
def unregister():
bpy.utils.unregister_module(__name__)
if __name__ == "__main__":
register()
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