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supergnu (supergnu@undisclosed.example.com) — 2020-06-24T11:11:28+00:00

Pinephone Code HSL vers RGB Faire pulser le fond d'une page web Parseur Arduino Personnalisation du thème PluXML pour Le Site du Gnu-Bricoleur Couleurs 16 bits en convention 565 Tableau circulaire How to use CMSIS librairies with Embitz IDE C implementation of the Octave/Matlab unwrap function One line If in C C implementation of a modulo function C linear fit, least square Astuces Astuces avec Linux Mint DE Astuces pour l'installation et la personnalisation de DokuWiki Raspber…

astuces:imagesweb - created

supergnu (supergnu@undisclosed.example.com) — 2020-06-24T11:10:31+00:00

Lower quality of a folder of pictures for the Web To convert a batch of images for the Web : for X in *.JPG; do convert “$X” -scale 20% -size 24% -strip -quality 86 “$X”; done will replace the pictures and delete the originals

jpeg_progressifs - created

supergnu (supergnu@undisclosed.example.com) — 2020-02-15T20:03:10+00:00

find . -iname \*.jpg -exec convert {} -interlace plane {} \;

pinephone_camera - created

supergnu (supergnu@undisclosed.example.com) — 2020-02-04T22:59:41+00:00

How to make the Pinephone camera works ? connect via ssh install git via apk install make and depency via apk clone media ctl

todo - created

supergnu (supergnu@undisclosed.example.com) — 2019-09-25T11:38:32+00:00

Linux file system arborescence explanation

freecad

supergnu (supergnu@undisclosed.example.com) — 2019-07-11T21:01:17+00:00

FreeCAD for Lasercutting To use FreeCAD with a Lasercutter, design your project with the “part design” workshop, assemble it with the “assembly2” workshop and then fire the “LCInterlocking” workshop on your assembly. Now you need to export it to a SVG file, except that if you use the

inkscape - created

supergnu (supergnu@undisclosed.example.com) — 2019-03-23T15:31:06+00:00

Inkscape centering object Add washers holes in FreeCAD assembly for lasercutting OR center object between two lines in inkscape **ADD IMAGES Group the two parallel lines forming your screw hole, align relative to First selected, add with SHIFT your washer sized rectagle to the selection and align.

linear_fit - created

supergnu (supergnu@undisclosed.example.com) — 2018-09-20T10:27:02+00:00

/************************************************************ *Linear fit * y = ax + b * a = S[(x - mean(X))*(y - mean(Y))]/S[(x - mean(X))*(x - mean(X))] * b = mean(Y) - a*mean(X) ************************************************************/ void linearFit(int *values, int numberOfValues, float *results) { float mean = 0; for (int i = 0; i < numberOfValues; i++) { mean += values[i]; } mean /= (numberOfValues+1); float numerator = 0; float demominator = 0; …

one_line

supergnu (supergnu@undisclosed.example.com) — 2018-09-19T17:27:33+00:00

One line If in C A really handy way to write condensate and yet easily readable code in C is using one line if when doing only simple operation in the if. There's two way of doing this, using a ternary operator (here ?) or a compact If syntax. It is absolutely not recommended to use this syntax everywhere but when only incrementing a variable for example, it is great.

start

supergnu (supergnu@undisclosed.example.com) — 2018-09-19T17:13:58+00:00

Bienvenue dans le Wiki du Gnu-Bricoleur ! Ce wiki a pour vocation de regrouper des morceaux de code, des liens, des astuces ou des informations utiles ou intéressants que je souhaite conserver. Comme il n'y avait aucune raison de le garder privé, le voici en public !

implementation_unwrap_modulo

supergnu (supergnu@undisclosed.example.com) — 2018-09-19T17:11:39+00:00

C implementation of the Octave/Matlab unwrap function The unwrap function in Octave/Matlab is simplifying the modulo of an arrray. It's an easy piece of code but handy to have it around off the shelf: int unwrap(int *values, int numberOfValues, int modulo)//modulo = 360 { int add = 0; for (int i = 1; i < numberOfValues; i++) { while(abs(values[i-1] - values[i]) > modulo/2) { (values[i-1] > values[i]) ? add += modulo : add -= modulo; //could be faster i…

implementation_modulo - created

supergnu (supergnu@undisclosed.example.com) — 2018-09-19T17:10:54+00:00

C implementation of a modulo function It's an easy piece of code but handy to have it around off the shelf: int modulo(int *values, int numberOfValues, int modulo) { for (int i = 0; i < numberOfValues; i++) { while(values[i] > modulo/2 || values[i] < modulo/2) { (values[i] > modulo/2) ? values[i] -= modulo : values[i] += modulo; } } }

capture_du_2017-07-12_20_59_23.png - created

supergnu (supergnu@undisclosed.example.com) — 2017-07-12T21:00:53+00:00

code:capture_du_2017-07-12_20_59_23.png - created

supergnu (supergnu@undisclosed.example.com) — 2017-07-12T21:00:36+00:00

gnu.png - créée

supergnu (supergnu@undisclosed.example.com) — 2017-07-10T13:35:31+00:00