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import numpy as np
import pandas as pd
class BVHWriter():
def __init__(self):
pass
def write(self, X, ofile):
# Writing the skeleton info
ofile.write('HIERARCHY\n')
self.motions_ = []
self._printJoint(X, X.root_name, 0, ofile)
# Writing the motion header
ofile.write('MOTION\n')
ofile.write('Frames: %d\n'%X.values.shape[0])
ofile.write('Frame Time: %f\n'%X.framerate)
# Writing the data
self.motions_ = np.asarray(self.motions_).T
lines = [" ".join(item) for item in self.motions_.astype(str)]
ofile.write("".join("%s\n"%l for l in lines))
def _printJoint(self, X, joint, tab, ofile):
if X.skeleton[joint]['parent'] == None:
ofile.write('ROOT %s\n'%joint)
elif len(X.skeleton[joint]['children']) > 0:
ofile.write('%sJOINT %s\n'%('\t'*(tab), joint))
else:
ofile.write('%sEnd site\n'%('\t'*(tab)))
ofile.write('%s{\n'%('\t'*(tab)))
ofile.write('%sOFFSET %3.5f %3.5f %3.5f\n'%('\t'*(tab+1),
X.skeleton[joint]['offsets'][0],
X.skeleton[joint]['offsets'][1],
X.skeleton[joint]['offsets'][2]))
channels = X.skeleton[joint]['channels']
n_channels = len(channels)
if n_channels > 0:
for ch in channels:
self.motions_.append(np.asarray(X.values['%s_%s'%(joint, ch)].values))
if len(X.skeleton[joint]['children']) > 0:
ch_str = ''.join(' %s'*n_channels%tuple(channels))
ofile.write('%sCHANNELS %d%s\n' %('\t'*(tab+1), n_channels, ch_str))
for c in X.skeleton[joint]['children']:
self._printJoint(X, c, tab+1, ofile)
ofile.write('%s}\n'%('\t'*(tab)))
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