# Mandelbrot Set TODO { Pretty amazing ASCII rendering of the Mandelbrot set can be found at http://www.mrob.com/pub/muency/asciigraphics.html. ~drummyfish } ``` ___________________________________________________________ |[-2,1] . | | .:. | | ::::: | | ...:::.. . | | :..:::::::::::::.... | | .:::::::::::::::::::' | | :::::::::::::::::::::::: | | :::::::::::::::::::::::::' | | :..:::. .:::::::::::::::::::::::::: | | .:::::::::. :::::::::::::::::::::::::: | | .. ::::::::::: :::::::::::::::::::::::::' | | ' ' '::':::::::::::'::::::::::::::::::::::::. | | ::::::::::: :::::::::::::::::::::::::: | | ':::::::' ::::::::::::::::::::::::::. | | ' ''' :::::::::::::::::::::::::' | | '::::::::::::::::::::::::' | | ''::::::::::::::::::::'' | | :::::::::::::::::::: | | ' ''::::::::'': | | .:::. | | ':::' | | : | |___________________________________________________[0.5,-1]| ``` ## Code The following code is a simple [C](c.md) program that renders the Mandelbrot set into terminal (for demonstrative purposes, it isn't efficient or do any [antialiasing](antialiasing.md)). ``` #include <stdio.h> #define ROWS 30 #define COLS 60 #define FROM_X -2.0 #define FROM_Y 1.0 #define STEP (2.5 / ((double) COLS)) unsigned int mandelbrot(double x, double y) { double cx = x, cy = y, tmp; for (int i = 0; i < 1000; ++i) { tmp = cx * cx - cy * cy + x; cy = 2 * cx * cy + y; cx = tmp; if (cx * cx * cy * cy > 1000000000) return 0; } return 1; } int main(void) { double cx, cy = FROM_Y; for (int y = 0; y < ROWS; ++y) { cx = FROM_X; for (int x = 0; x < COLS; ++x) { unsigned int point = mandelbrot(cx,cy) + (mandelbrot(cx,cy + STEP) * 2); putchar(point == 3 ? ':' : (point == 2 ? '\'' : (point == 1 ? '.' : ' '))); cx += STEP; } putchar('\n'); cy -= 2 * STEP; } return 0; } ```