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Roninkoi Roninkoi

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Games, graphics, physics sim

Roninkoi / vtkToObj.py

Last active October 24, 2024 06:04

Convert vtkUnstructuredGrid VTK file to Wavefront OBJ file or STL file

	#!/bin/env python3
	# Convert vtkUnstructuredGrid VTK file to Wavefront OBJ file or STL file

	import sys
	import os
	import vtk

	if len(sys.argv) != 3:
	print('Usage: ', sys.argv[0], 'in.vtk out.obj')
	sys.exit()

Roninkoi / buildgcc.sh

Created April 3, 2024 08:33

Build GCC from Git

	#!/bin/sh
	# clone and build gcc for linux, link bin
	gccpath="/home/ronialek/gcc-test"
	mkdir $gccpath
	cd $gccpath
	git clone git://gcc.gnu.org/git/gcc.git .
	git checkout releases/gcc-13
	./contrib/download_prerequisites
	mkdir build
	cd build

Roninkoi / extract_last.py

Created May 9, 2023 08:44

Extract last frame of LAMMPS xyz file

	#!/bin/env python3
	# Extract last frame from LAMMPS xyz dump file
	# inpath and write it to outpath

	inpath = "AgNWSiO2.xyz"
	outpath = "data.AgNWSiO2"
	df = open(inpath, "r")
	buf = []
	i = 0
	for l in df:

Roninkoi / filehex.sh

Last active February 28, 2023 21:33

Write hexadecimal byte contents to multiple files. The file files.txt has rows in the format <filename> <hexadecimal number ffff...>

	#!/bin/sh
	##xargs -a files.txt -n2 sh -c '(echo "16i $(echo $1 \| tr '[:lower:]' '[:upper:]') P" \| dc) > $0'
	xargs -a files.txt -n2 sh -c 'echo $1 \| xxd -r -p - $0'

Roninkoi / plot.py

Last active November 24, 2022 16:40

My Python plotting scripts

	# Roni Koitermaa 2022
	# Plotting code using Matplotlib
	# Line/scatter plots, subplots, histogram plot, bar plot

	import numpy as np
	from matplotlib import rc
	import matplotlib.pyplot as plt
	import matplotlib.ticker as mtick

	# line + scatter plot of multiple data sets a

Roninkoi / mkvsubs.sh

Last active October 31, 2022 15:43

Change default audio and subtitle track in mkv files

	#!/bin/sh
	# set audio and subtitle track 2 as default in mkv files (typically japanese with english subtitles)

	for file in *.mkv ; do
	mkvpropedit "$file" --edit track:a1 --set flag-default=0 --set flag-forced=0 \
	--edit track:a2 --set flag-default=1 --set flag-forced=0 \
	--edit track:s1 --set flag-default=0 --set flag-forced=0 \
	--edit track:s2 --set flag-default=1 --set flag-forced=0
	done

Roninkoi / tsdl.sh

Created August 5, 2022 00:21

Download series of .ts files from a web video stream and concatenate into mp4

	#!/bin/sh
	# Download series .ts files and concatenate into mp4 using ffmpeg
	# Usage: tsdl <url> <file prefix i.e. prefix_0.ts>

	if [ $# != 2 ]; then
	echo "Usage: tsdl <url> <file prefix i.e. prefix_0.ts>"
	exit
	fi

	echo "ffconcat version 1.0" > tsdl_list.txt

Roninkoi / pianohammers.py

Created September 28, 2021 05:32

Fourier analysis of piano hammer shapes and positions where they hit the string

	# Fourier analysis of piano hammer shapes on string.
	# Hammers of different shapes hit piano string at different points,
	# what is the frequency spectrum?

	import numpy as np
	import matplotlib.pyplot as plt

	# line + scatter plot of multiple data sets a
	def linescatter(a, titles=["", "", ""], labels=[], styles=[], fpath="", cm=plt.cm.rainbow):
	f = plt.figure(figsize=(10, 10))

Roninkoi / particleinbox.py

Last active May 28, 2021 02:33

Solve particle-in-a-box problem

	import numpy as np
	import matplotlib.pyplot as plt

	# line + scatter plot of multiple data sets a
	def linescatter(a, titles=["", "", ""], labels=[], styles=[], fpath=""):
	f = plt.figure(figsize=(10, 10))
	plt.rcParams.update({'font.size': 22})
	colors = plt.cm.plasma(np.linspace(0, 1, len(a)))
	plt.rcParams['axes.prop_cycle'] = plt.cycler(color=colors)

Roninkoi / mcplane.py

Created November 25, 2020 14:52

Plane boarding time Monte Carlo simulation

	import numpy as np

	class Passenger:
	walkspd = 0.5 # walking speed
	storespd = 30 # luggage storing speed
	swapspd = 15 # seat swapping speed

	def __init__(self, aislerow, seatrow, seatcol):
	self.x = 0 # at gate
	self.aislerow = int(aislerow)