77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
#include "sys.h"
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#define ROWS 25
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#define COLS 80
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#define ASPECT 1.6
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#define VERBATIM(s) #s
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#define AS_STRING(s) VERBATIM(s)
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const char *header = "\r\e[" AS_STRING(ROWS) "A";
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static int test(c1, c2)
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double c1, c2;
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{
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double x, y;
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x = y = 0;
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for (int n = 0; n < 1000; n++) {
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double newx = x * x - y * y + c1;
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double newy = 2 * x * y + c2;
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x = newx;
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y = newy;
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if ((x * x + y * y) > 10.0) {
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return n / 124;
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}
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}
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return 9;
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}
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// double refx = 0.3245046418497685;
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// double refy = 0.04855101129280834;
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// double refx = 0.3215000630401344;
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// double refy = 0.04855009999999;
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// double refx = 0.32158;
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// double refy = 0.048;
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double refx = 0.32151002;
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double refy = 0.04800001;
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char buffer[32768];
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int main() {
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int pos = 0;
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double scale = 2;
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double x, y;
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for (int i = 0; i < 610; i++) {
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y = refy + scale;
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for (int i = 0; i < ROWS; i++) {
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x = refx - scale * ASPECT;
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y -= 2 * scale / (double)(ROWS);
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for (int j = 0; j < COLS; j++) {
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x += 2 * scale / (double)(COLS)*ASPECT;
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int r = test(x, y);
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buffer[pos++] = '\e';
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buffer[pos++] = '[';
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buffer[pos++] = '4';
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buffer[pos++] = r + '0';
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buffer[pos++] = 'm';
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buffer[pos++] = ' ';
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}
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buffer[pos++] = '\e';
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buffer[pos++] = '[';
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buffer[pos++] = '0';
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buffer[pos++] = 'm';
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buffer[pos++] = '\n';
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}
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write(1, buffer, pos);
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usleep(30000);
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scale *= 0.95;
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// Rewind cursor
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pos = 0;
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for (const char *p = header; *p; p++)
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buffer[pos++] = *p;
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}
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return 0;
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}
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