Martin Fiedler kajott
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| #if 0 | |
| gcc -std=c99 -Wall -Wextra -pedantic -g -O4 -march=native $0 -lm || exit 1 | |
| ./a.out && feh joymap.ppm | |
| exit $? | |
| #endif | |
| // visualization of analog joystick to 8-way digital direction quantization | |
| // see https://github.com/sulix/omnispeak/pull/14 | |
| #include <stdbool.h> |
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| 10 CLS : RESTORE 500 | |
| 20 READ x,y,u,v | |
| 30 IF x=999 THEN GOTO 70 | |
| 40 PLOT 128+x, 88+y : DRAW u-x, v-y | |
| 50 PLOT 129+x, 88+y : DRAW u-x, v-y | |
| 60 GOTO 20 | |
| 70 PRINT AT 21,9; "WHAT, ME WORRY?" | |
| 80 IF INKEY$ = "" THEN GOTO 80 | |
| 90 CLS : PRINT "\* 1985 E.C. PUBLICATIONS" | |
| 500 DATA -27,-11,-23,-6,-28,-13,-22,-6,-20,-5,-12,-5,-27,-14,-26,-13 |
kajott
/ bluenoise.c
Created
June 26, 2019 10:49
Blue Noise texture generation using the void-and-cluster algorithm
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| #if 0 // self-compiling code | |
| gcc -std=c99 -Wall -Wextra -pedantic -Werror -g -O4 -march=native $0 -lm || exit 1 | |
| exec time ./a.out | |
| #endif | |
| // Blue Noise texture generation using the void-and-cluster algorithm | |
| // implemented by Martin Fiedler <[email protected]> | |
| // using an algorithm description written by Alan Wolfe: | |
| // https://blog.demofox.org/2019/06/25/generating-blue-noise-textures-with-void-and-cluster/ |
kajott
/ aoc2018_10_adversarial.txt
Created
December 18, 2018 10:31
adversarial input for Advent of Code 2018 Day 10
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| position=<-58825, 5905> velocity=< 8, -6> | |
| position=< 50749, -19111> velocity=<-7, 4> | |
| position=< 50995, -8236> velocity=<-3, -5> | |
| position=< 44611, -17672> velocity=<-8, 1> | |
| position=< 41069, -41189> velocity=<-8, 3> | |
| position=< 9181, -56028> velocity=<-6, 2> | |
| position=<-24979, 38514> velocity=<-2, 1> | |
| position=< 19502, 58516> velocity=<-3, -9> | |
| position=< 58524, 6506> velocity=<-9, -1> | |
| position=<-47781, 14688> velocity=<-1, -3> |
kajott
/ EGATEST.BAS
Created
September 1, 2018 18:26
test program to find out whether EGA 200-line mode palette manipulation might be feasible after all
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| 10 SCREEN 0: REM This program makes only sense to be run on EGA cards, not VGA! | |
| 20 SCREEN 9: H% = 105: GOSUB 1000: LOCATE 9 | |
| 30 PRINT "Notice the nice rainbow colors above? That's what you can get by reprogramming" | |
| 40 PRINT "the EGA palette. Unfortunately, this only works in 350-line mode." | |
| 50 PRINT "Press any key to see what it looks like in 200-line mode." | |
| 60 WHILE INKEY$ = "": WEND | |
| 70 SCREEN 8: H% = 60: GOSUB 1000: LOCATE 9 | |
| 80 PRINT "Well, that's not nearly as nice as it was in 350-line mode. Turns out, the EGA" | |
| 90 PRINT "monitor emulates a CGA monitor in 200-line mode and thus restricts the palette" | |
| 100 PRINT "to the 16 CGA colors. Reprogramming the EGA palette can shuffle the CGA colors" |
kajott
/ image_predict.c
Created
May 4, 2018 07:14
channel separation, color decorrelation, and prediction filtering as preprocessing for lossless RGB image compression
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| #if 0 // self-compiling code | |
| gcc -std=c99 -Wall -Wextra -pedantic -g -O3 -march=native $0 -o image_predict || exit 1 | |
| exec ./image_predict $* | |
| #endif | |
| // Example code for pre-filtering operations that transform RGB images into | |
| // representations that are better suited for lossless compression | |
| // (color channel separation and decorrelation, pixel prediction). | |
| // Takes a .ppm file as an input and generates multiple files in the form |
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