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from math import *
import bpy
from mathutils import *
def main(context):
def cleanupEulCurve(fcv):
keys = []
for k in fcv.keyframe_points:
keys.append([k.handle1.copy(), k.co.copy(), k.handle2.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 == None:
continue
th = pi
if abs(prev[1][1] - cur[1][1]) >= th: # more than 180 degree jump
fac = pi*2
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].handle1[x] = keys[i][0][x]
fcv.keyframe_points[i].co[x] = keys[i][1][x]
fcv.keyframe_points[i].handle2[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"
def poll(self, context):
return context.active_object != None
def execute(self, context):
main(context)
return {'FINISHED'}
def register():
pass
def unregister():
pass
if __name__ == "__main__":
register()
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