DavidBuchanan314
/ cursed_mandelbrot.c
Last active
June 28, 2023 15:12
Compile-time mandelbrot in pure C. Outputs a PGM image file to stdout. Output can be seen at https://twitter.com/David3141593/status/1062468528115200001
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| #include <stdio.h> | |
| #define SQ(x) (x)*(x) | |
| #define M0(x,y) SQ(x)+SQ(y)<4?0:0xe0 | |
| #define M1(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M0(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0)):0xc0 | |
| #define M2(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M1(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0xa0 | |
| #define M3(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M2(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x80 | |
| #define M4(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M3(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x60 | |
| #define M5(x,y,x0,y0) (SQ(x)+SQ(y)<4)?M4(SQ(x)-SQ(y)+(x0),2*(x)*(y)+(y0),x0,y0):0x40 |
9SQ
/ openlayers_test1.html
Last active
August 29, 2015 14:07
OpenStreetMap(EPSG:3857)の上にVector Layer(EPSG:4326)を乗せる (OpenLayers 3)
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| <!doctype html> | |
| <html lang="ja"> | |
| <head> | |
| <link rel="stylesheet" href="http://openlayers.org/en/v3.0.0/css/ol.css" type="text/css"> | |
| <style> | |
| .map { | |
| height: 500px; | |
| width: 100%; | |
| } | |
| </style> |