pgorczak

pgorczak

import numpy as np
from matplotlib.cm import get_cmap

import rospy
import sensor_msgs.msg as sensor_msgs
import std_msgs.msg as std_msgs


def point_cloud(points, parent_frame):
    """ Creates a point cloud message.

pgorczak

#! /usr/bin/env python

import argparse
import itertools

import cv2
import numpy as np

if __name__=='__main__':
    parser = argparse.ArgumentParser(

pgorczak

import logging

import rospy

# Messages sent to my_logger will not be directed to stdout.
# They will show up in rqt_console with my_logger associated to the node.
logging.getLogger('my_logger').addHandler(rospy.impl.rosout.RosOutHandler())
logging.getLogger('my_logger').setLevel(logging.INFO)

pgorczak

""" Simple solution for streaming audio from Gqrx to Firefox.

Requires the opusenc command line tool.

This program uses the fact that Opus files can be concatenated to form a valid
stream and that Firefox can play these streams natively. The drawback is the
overhead created by repeatedly inserting containers and metadata into the
stream.

- Check https://fastapi.tiangolo.com/tutorial/ to see how to run the server.

pgorczak

from pydrake.symbolic import Variable
from pydrake.systems.analysis import Simulator
from pydrake.systems.controllers import PidController
from pydrake.systems.framework import BasicVector, DiagramBuilder, LeafSystem
from pydrake.systems.primitives import SymbolicVectorSystem

k = 1
s = 1
m = 1

pgorczak

from pydrake.symbolic import Variable
from pydrake.systems.analysis import Simulator
from pydrake.systems.controllers import PidController
from pydrake.systems.framework import DiagramBuilder
from pydrake.systems.primitives import SymbolicVectorSystem

x, xd = Variable('x'), Variable('xdot')
f = Variable('f')
state = [x, xd]
k = 1

pgorczak

LTE transport block size

This is the lookup table linking the transport block size index (determined by modulation and coding scheme) and the number of resource blocks to an LTE transport block size. It's taken from 3GPP [TS 36.213][36.213] (Table 7.1.7.2.1-1) at version 15.0.0. Multiply a TBS by 1000 to get the max throughput in bps.

pgorczak

Video export for openFrameworks

This is a small helper that uses ffmpeg to record h264 video from openFrameworks.

It starts ffmpeg in a subprocess, so ffmpeg should be available on your system. Tested on Linux but probably works on macOS too.

How to use

pgorczak

import threading

import rospy


def get_single_msg(topic, type_, timeout=None):
    """ Utility function that gets a single message from a ROS topic.
    
    Args:
        topic: ROS topic (string).