Automation utility for conversion of CAD input files (.step, etc.) to .obj files using CAD Assistant, xdotool and xprop.

autocadass

#! /bin/bash

# Auto CAD Assistant - Automation utility for conversion of CAD input files (.step, etc.) to .obj 
# files using CAD Assistant, xdotool and xprop. Just give it a bunch of input CAD files and behold
# the robot as it automatically navigates and operates CAD Assistant.

# MIT License
#
# Copyright (c) 2021 Marcel Toele
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

DEBUG=false

PROGNAME="$(basename "$0")"

# Path to CAD Assistant binary (or, in this case, an alias):
CADASS=cadass

usage() {
	echo -e "Usage:\n\n\t${PROGNAME} FILE [FILE ...]\n" 1>&2
}

die() {
	echo -e "${PROGNAME}: $1" 1>&2
	exit 1
}

try_for_x_sec() {
	x=$1
	t0=$(date +%s)
	tEnd=$( expr $t0 + $x )
	shift

	while [ $(date +%s) -lt $tEnd ] ; do
		$DEBUG && echo ">>> $@ <<<" 1>&2
		stdout=$("$@")

		if [ $? -eq 0 ] ; then
			$DEBUG && echo "Success" 1>&2

			echo "${stdout}"

			return 0
		else
			$DEBUG && echo "No success yet..." 1>&2
		fi

		sleep 1
	done

	die "try_for_x_sec: Error: The following commands never succeeded (exiting before bad things happen...):\n\n\t\t$*\n"
}

click_at() {
	x=$1
	y=$2
	xdotool mousemove $x $y
	xdotool click 1
}

as_keys() {
	echo "${1}" | sed '
		s/ / ~/g;
		s/\([^ ]\)/ \1/g;
		s/~/space/g;
		s/[.]/period/g;
		s/[,]/comma/g;
		s/[+]/plus/g;
		s/[-]/minus/g;
		s/[_]/underscore/g;
		s/[:]/colon/g;
		s/[;]/semicolon/g;
		s/[(]/parenleft/g;
		s/[)]/parenright/g;
		s/[{}]/braceleft/g;
		s/[}]/braceright/g;
		s/\[/bracketleft/g;
		s/\]/bracketright/g;
		s/[<]/less/g;
		s/[=]/equal/g;
		s/[>]/greater/g;
		s/[?]/question/g;
		s/\^/asciicirum/g;
		s/[#]/numbersign/g;
		s/[$]/dollar/g;
		s/[%]/percent/g;
		s/[&]/ampersand/g;
	'
}

convert_file() {
	file="$1"
	outfile="${file%.*}.obj"

	if [ -e "${outfile}" ] ; then
		echo "\"${outfile}\" already exists, skipping..."
		return 0
	fi

	if xdotool search --onlyvisible --name "CAD Assistant" > /dev/null ; then
		die "Existing CAD Assistent detected, please close this one first."
	fi

	outfile_basename="$(basename "${outfile}")"
	outfile_basename_keys="$(as_keys "${outfile_basename}")"

	$DEBUG && echo -e "${file}\n\t-> ${outfile}\n\t-> ${outfile_basename}\n\t-> ${outfile_basename_keys}\n"

	# Open CAD Assistant and load model:
	$CADASS "${file}" &> /dev/null &

	cadass_pid=$!

	# Find CAD Assistant window id:
	cadass_win_id=$(try_for_x_sec 10 xdotool search --onlyvisible --name "^Import.*CAD Assistant")

	$DEBUG && echo "cadass_win_id: ${cadass_win_id}     $(xdotool getwindowname ${cadass_win_id})"

	# Wait until CAD Assistant is done importing the model:
	# (This '[^Ii]...*' approach is not ideal, but it'll have to do)
	try_for_x_sec 10 xdotool search --onlyvisible --name "^[^Ii][^Mm][^Pp][^Oo][^Rr][^Tt].*CAD Assistant" > /dev/null

	# Turn off window decorations and give the window well-defined and known geometry,
	# so that click offsets become deterministic:
	try_for_x_sec 2 xprop -id ${cadass_win_id} -format _MOTIF_WM_HINTS 32i -set _MOTIF_WM_HINTS 2
	try_for_x_sec 2 xdotool windowmove ${cadass_win_id} 0 0
	try_for_x_sec 2 xdotool windowsize ${cadass_win_id} 1000 600

	# Click save icon in menu:
	click_at 25 150

	# Click file type:
	click_at 768 600

	# Select OBJ:
	click_at 763 210

	# click file name field:
	click_at 458 600

	# Select all text:
	xdotool key --window ${cadass_win_id} control+a 
	sleep 0.1

	# Type destination filename (without extension):
	xdotool key --window ${cadass_win_id} ${outfile_basename_keys}

	# Click on save icon in file dialog:
	click_at 936 600

	# Wait until destination file exists on disk:
	try_for_x_sec 10 ls -lah "${outfile}"

	# Close CAD Assistant:
	xdotool windowkill ${cadass_win_id}
}

$DEBUG && set -x

if [ "$#" -eq 0 ]; then
	usage
	die "Missing required argument"
fi

if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
	usage
	exit 0
fi

for FILE in "$@"; do
	convert_file "${FILE}"
done