74 lines
1.3 KiB
C
74 lines
1.3 KiB
C
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/* $Source$
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* $State$
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* $Revision$
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*/
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/* Adapted from code by Chris Losinger. (This is the non-obfuscated
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* version...
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*
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* http://www.codeproject.com/cpp/mandelbrot_obfuscation.asp
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*/
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#include <stdlib.h>
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#include <unistd.h>
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enum
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{
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ROWS = 40,
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COLUMNS = 60,
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MAX_ITERATIONS = 255
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};
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void nl(void)
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{
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write(1, "\n", 1);
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}
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void out(int n)
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{
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const char* chars = "****++++++---- ";
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write(1, chars + (n/16), 1);
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}
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int main(int argc, const char* argv[])
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{
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/* Size and position of the visible area. */
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double view_r = -2.3, view_i = -1.0;
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double zoom = 0.05;
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int x, y, n;
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for (y=0; y < ROWS; y++)
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{
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double c_i = view_i + y * zoom;
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for (x=0; x < COLUMNS; x++)
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{
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double c_r = view_r + x*zoom;
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double z_r = c_r;
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double z_i = c_i;
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for (n=0; n < MAX_ITERATIONS; n++)
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{
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double z_r2 = z_r * z_r;
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double z_i2 = z_i * z_i;
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/* Have we escaped? */
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if (z_r2 + z_i2 > 4)
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break;
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/* z = z^2 + c */
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z_i = 2 * z_r * z_i + c_i;
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z_r = z_r2 - z_i2 + c_r;
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}
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out(n);
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}
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nl();
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}
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return 0;
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}
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