pabsan-0

Installing UE4+Airsim on Ubuntu 22.04 Jammy

Install Unreal Engine 4

Register on epic and all that, then once you have access to the source code, clone and build.

This step gets us:

Unreal Engine 4: core simulation engine

Gstreamer RTSP demos

This gist comprises several Gstreamer send-recv examples through an RTSP server.

Dependencies

Tmuxinator apt install tmuxinator
Tmux apt install tmux
Gstreamer fat install

Plane tilt corrector

Given three non-square points ABP within a plane, of which A and B can move vertically while P is fixed, the conversion from unaligned tilting to plane orthogonal rotation to an arbitrary XYZ coordinate frame is not trivial and raises the following challenges:

Requested a pure rotation around the X or Y axes, yield the actuation needed in terms of A and B vertical position.
Requested a vertical movement in A or B, adjust its partner height so that the plane rotation is square with a fixed coordinate frame.

This script simulates and solves the two above scenarios.

	#!/bin/bash

	# Terminology:
	#
	# ~ # target_dir
	# ├── .tmux.conf -> dotfiles/vim/.vimrc # target_link target_file
	# ├── .vimrc
	# │
	# └── dotfiles # stow_dir
	# ├── tmux # stow_pkg

	# Alcampo.es nutritional value web scraper.
	# Usage:
	# $ alcampo.sh <URL>
	#


	# Scrape product title
	curl -s "$1" \| tr "h1" "\n" \| grep '"name":"' \| sed 's:^.name"\:"::' \| sed 's:"."description.$::g'
	echo

	#! /usr/bin/env -S tmuxinator start -p
	# chmod +x me!

	name: latency profiler
	on_project_exit: killall gst-launch-1.0; tmux kill-session
	windows:
	- main:
	layout: even-vertical
	panes:
	- gst-launch-1.0 uridecodebin "uri=rtsp://10.0.3.5:8554/basler3" ! queue ! videoconvert ! videobalance brightness=0.5 contrast=1.5 ! xvimagesink sync=0 async=0

	name: ros_noetic_video
	on_project_exit: tmux kill-window
	windows:
	- main:
	pre: source /opt/ros/noetic/setup.bash
	layout: tiled
	panes:
	- roscore
	- sleep 1; roslaunch rosbridge_server rosbridge_websocket.launch
	- sleep 1; rosrun web_video_server web_video_server

	#!/usr/bin/env node

	const rosnodejs = require('rosnodejs');
	const { readFileSync, readdirSync } = require('fs');
	const { readFile } = require('fs').promises;
	const express = require('express');
	const app = express();
	const path = require('node:path');

	let host = null

	Plug 'puremourning/vimspector' " wrap in vim-plug paragraph

	let g:vimspector_enable_mappings = 'HUMAN'
	let g:vimspector_sign_priority = {} "TBD