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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 3
# 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 #####
# <pep8-80 compliant>
# This script was developed with financial support from the Foundation for
# Science and Technology of Portugal, under the grant SFRH/BD/66452/2009.
bl_info = {
'name': "C3D Graphics Lab Motion Capture file (.c3d)",
'author': "Daniel Monteiro Basso <daniel@basso.inf.br>",
'version': (2011, 11, 3, 1),
'blender': (2, 6, 0),
'location': "File > Import",
'description': "Imports C3D Graphics Lab Motion Capture files",
'wiki_url': "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
"Scripts/Import-Export/C3D_Importer",
'tracker_url': "http://projects.blender.org/tracker/?func=detail&atid=467"
"&aid=29061&group_id=153",
'category': 'Import-Export'}
import bpy
from bpy.props import (StringProperty,
BoolProperty,
FloatProperty,
IntProperty,
)
import math
import time
from mathutils import Vector
from . import import_c3d
class C3DAnimateCloud(bpy.types.Operator):
"""
Animate the Marker Cloud
"""
bl_idname = "import_anim.c3danim"
bl_label = "Animate C3D"
markerset = None
uname = None
curframe = 0
fskip = 0
scale = 0
timer = None
def modal(self, context, event):
if event.type == 'ESC':
return self.cancel(context)
if event.type == 'TIMER':
if self.curframe > self.markerset.endFrame:
return self.cancel(context)
fno = self.curframe
if not self.use_frame_no:
fno = (self.curframe - self.markerset.startFrame) / self.fskip
for i in range(self.fskip):
self.markerset.readNextFrameData()
for ml in self.markerset.markerLabels:
name = self.unames[self.prefix + ml]
o = bpy.context.scene.objects[name]
m = self.markerset.getMarker(ml, self.curframe)
o.location = Vector(m.position) * self.scale
if m.confidence >= self.confidence:
o.keyframe_insert('location', frame=fno)
self.curframe += self.fskip
return {'PASS_THROUGH'}
def execute(self, context):
context.window_manager.modal_handler_add(self)
self.timer = context.window_manager.\
event_timer_add(0.001, context.window)
return {'RUNNING_MODAL'}
def cancel(self, context):
bpy.context.scene.frame_set(bpy.context.scene.frame_current)
context.window_manager.event_timer_remove(self.timer)
return {'CANCELLED'}
class C3DImporter(bpy.types.Operator):
"""
Load a C3D Marker Cloud
"""
bl_idname = "import_anim.c3d"
bl_label = "Import C3D"
filepath = StringProperty(
subtype='FILE_PATH',
)
from_inches = BoolProperty(
name="Convert from inches to metric",
default=False,
description="Scale by 2.54/100",
)
scale = FloatProperty(
name="Scale",
default=1.0,
description="Scale the positions by this value",
min=0.0001, max=1000000.0,
soft_min=0.001, soft_max=100.0,
)
auto_scale = BoolProperty(
name="Adjust scale automatically",
default=False,
description="Guess correct scale factor",
)
auto_magnitude = BoolProperty(
name="Adjust scale magnitude",
default=True,
description="Automatically adjust scale magnitude",
)
size = FloatProperty(
name="Empty Size",
default=.03,
description="The size of each empty",
min=0.0001, max=1000000.0,
soft_min=0.001, soft_max=100.0,
)
x_ray = BoolProperty(
name="Use X-Ray",
default=True,
description="Show the empties over other objects",
)
frame_skip = IntProperty(
name="Fps divisor",
default=4,
# usually the sample rate is 120, so the default 4 gives you 30fps
description="Frame supersampling factor",
min=1,
)
use_frame_no = BoolProperty(
name="Use frame numbers",
default=False,
description="Offset start of animation according to the source",
)
show_names = BoolProperty(
name="Show Names", default=False,
description="Show the markers' name",
)
prefix = StringProperty(
name="Name Prefix", maxlen=32,
description="Prefix object names with this",
)
confidence = FloatProperty(
name="Minimum Confidence Level", default=0,
description="Only consider markers with at least "
"this confidence level",
min=-1., max=1000000.0,
soft_min=-1., soft_max=100.0,
)
filter_glob = StringProperty(default="*.c3d;*.csv", options={'HIDDEN'})
def find_height(self, ms):
"""
Heuristic to find the height of the subject in the markerset
(only works for standing poses)
"""
zmin = None
for ml in ms.markerLabels:
if 'LTOE' in ml:
hd = ml.replace('LTOE', 'LFHD')
if hd not in ms.markerLabels:
break
pmin_idx = ms.markerLabels.index(ml)
pmax_idx = ms.markerLabels.index(hd)
zmin = ms.frames[0][pmin_idx].position[2]
zmax = ms.frames[0][pmax_idx].position[2]
if zmin is None: # could not find named markers, get extremes
allz = [m.position[2] for m in ms.frames[0]]
zmin, zmax = min(allz), max(allz)
return abs(zmax - zmin)
def adjust_scale_magnitude(self, height, scale):
mag = math.log10(height * scale)
#print('mag',mag, 'scale',scale)
return scale * math.pow(10, -int(mag))
def adjust_scale(self, height, scale):
factor = height * scale / 1.75 # normalize
if factor < 0.5:
scale /= 10.0
factor *= 10.0
cmu_factors = [(1.0, 1.0), (1.1, 1.45), (1.6, 1.6), (2.54, 2.54)]
sqerr, fix = min(((cf[0] - factor) ** 2.0, 1.0 / cf[1])
for cf in cmu_factors)
#print('height * scale: {:.2f}'.format(height * scale))
#print(factor, fix)
return scale * fix
def execute(self, context):
s = self.properties.size
empty_size = (s, s, s)
ms = import_c3d.read(self.properties.filepath, onlyHeader=True)
ms.readNextFrameData()
#print(ms.fileName)
# determine the final scale
height = self.find_height(ms)
#print('h', height)
scale = 1.0 if not self.properties.from_inches else 2.54
scale *= ms.scale
if self.properties.auto_magnitude:
scale = self.adjust_scale_magnitude(height, scale)
#print('scale',scale)
if self.properties.auto_scale:
scale = self.adjust_scale(height, scale)
scale *= self.properties.scale
# create the empties and get their collision-free names
unames = {}
for ml in ms.markerLabels:
bpy.ops.object.add()
bpy.ops.transform.resize(value=empty_size)
name = self.properties.prefix + ml
bpy.context.active_object.name = name
unames[name] = bpy.context.active_object.name
bpy.context.active_object.show_name = self.properties.show_names
bpy.context.active_object.show_x_ray = self.properties.x_ray
for name in unames.values():
bpy.context.scene.objects[name].select = True
# start animating the empties
C3DAnimateCloud.markerset = ms
C3DAnimateCloud.unames = unames
C3DAnimateCloud.scale = scale
C3DAnimateCloud.fskip = self.properties.frame_skip
C3DAnimateCloud.prefix = self.properties.prefix
C3DAnimateCloud.use_frame_no = self.properties.use_frame_no
C3DAnimateCloud.confidence = self.properties.confidence
C3DAnimateCloud.curframe = ms.startFrame
bpy.ops.import_anim.c3danim()
return {'FINISHED'}
def invoke(self, context, event):
wm = context.window_manager
wm.fileselect_add(self)
return {'RUNNING_MODAL'}
def menu_func(self, context):
self.layout.operator(C3DImporter.bl_idname,
text="Graphics Lab Motion Capture (.c3d)")
def register():
bpy.utils.register_module(__name__)
bpy.types.INFO_MT_file_import.append(menu_func)
def unregister():
bpy.utils.unregister_module(__name__)
bpy.types.INFO_MT_file_import.remove(menu_func)
if __name__ == "__main__":
register()
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