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"""
the blender script to export camera pose to TUM format
"""
import bpy
def write_some_data(context, filepath, use_some_setting):
print("running write_some_data...")
camera = context.active_object
mw = camera.matrix_world
scene = context.scene
frame = scene.frame_start
f = open(filepath, 'w', encoding='utf-8')
# Write the header line
f.write("# TUM format ground truth pose, timestamp x y z q_x q_y q_z q_w\n")
while frame <= scene.frame_end:
scene.frame_set(frame)
x, y, z = mw.to_translation()
q = mw.to_quaternion()
f.write("%04d %f %f %f %f %f %f %f\n" % (frame, x, y, z, q.x, q.y, q.z, q.w))
frame += 1
f.close()
return {'FINISHED'}
# ExportHelper is a helper class, defines filename and
# invoke() function which calls the file selector.
from bpy_extras.io_utils import ExportHelper
from bpy.props import StringProperty, BoolProperty, EnumProperty
from bpy.types import Operator
class ExportSomeData(Operator, ExportHelper):
"""This appears in the tooltip of the operator and in the generated docs"""
bl_idname = "export_test.some_data" # important since its how bpy.ops.import_test.some_data is constructed
bl_label = "Export Some Data"
# ExportHelper mixin class uses this
filename_ext = ".txt"
filter_glob: StringProperty(
default="*.txt",
options={'HIDDEN'},
maxlen=255, # Max internal buffer length, longer would be clamped.
)
# List of operator properties, the attributes will be assigned
# to the class instance from the operator settings before calling.
use_setting: BoolProperty(
name="Example Boolean",
description="Example Tooltip",
default=True,
)
type: EnumProperty(
name="Example Enum",
description="Choose between two items",
items=(
('OPT_A', "First Option", "Description one"),
('OPT_B', "Second Option", "Description two"),
),
default='OPT_A',
)
def execute(self, context):
return write_some_data(context, self.filepath, self.use_setting)
# Only needed if you want to add into a dynamic menu
def menu_func_export(self, context):
self.layout.operator(ExportSomeData.bl_idname, text="Text Export Operator")
# Register and add to the "file selector" menu (required to use F3 search "Text Export Operator" for quick access).
def register():
bpy.utils.register_class(ExportSomeData)
bpy.types.TOPBAR_MT_file_export.append(menu_func_export)
def unregister():
bpy.utils.unregister_class(ExportSomeData)
bpy.types.TOPBAR_MT_file_export.remove(menu_func_export)
if __name__ == "__main__":
register()
# test call
bpy.ops.export_test.some_data('INVOKE_DEFAULT')
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