140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
#include <stdio.h>
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#include <math.h>
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#include <unistd.h>
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#include <locale.h>
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#include <ncurses.h>
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#include <sys/ioctl.h>
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double clamp(double num, double min, double max)
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{
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return (num > max ? max : (num < min ? min : num));
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}
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int strln_nt(char *str)
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{
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int len = 0;
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while(str[len])
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len++;
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return len;
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}
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int main()
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{
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// set locale for ncurses
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setlocale(LC_CTYPE, "");
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// init ncurses
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initscr();
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raw();
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noecho();
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nodelay(stdscr, TRUE);
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intrflush(stdscr, FALSE);
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keypad(stdscr, TRUE);
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// get term size
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int HEIGHT, WIDTH;
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getmaxyx(stdscr, HEIGHT, WIDTH);
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HEIGHT -= 2;
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WIDTH -= 2;
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// set animation properties
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double sinestep = 5, sinephase = 0,
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vsinestep = 1, vsinephase = 0,
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parastep = 5, paraphase = 1;
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// hide cursor
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curs_set(0);
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// draw border
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border('|', '|', '-', '-', '+', '+', '+', '+');
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while(1)
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{
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whilestart:
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if(getch() == 'q')
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goto end;
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sinephase += sinestep;
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if(sinephase > (20 * M_PI))
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sinephase = 0;
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vsinephase += vsinestep;
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if(vsinephase > (8 * M_PI))
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vsinephase = 0;
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paraphase += parastep;
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if(paraphase >= 360 || paraphase <= 1)
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parastep *= -1;
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// init graph
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char graph[HEIGHT][WIDTH];
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for(int y = 0; y < HEIGHT; ++y)
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for(int x = 0; x < WIDTH; ++x)
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graph[y][x] = ' ';
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// do the math
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/* sine wave */
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for(double x = 0; x < WIDTH; ++x)
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{
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int y = (int)round(clamp(HEIGHT / 4 * 3 + (sin((x - sinephase) / 10) * 5), 0, HEIGHT));
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graph[y][(int)x] = 'X';
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}
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/* cosine wave */
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for(double x = 0; x < WIDTH; ++x)
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{
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int y = (int)round(clamp(HEIGHT / 4 + (cos((x - sinephase) / 10) * 5), 0, HEIGHT));
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graph[y][(int)x] = 'X';
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}
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/* vertical sine wave */
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for(double y = 0; y < HEIGHT; ++y)
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{
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int x = (int)round(clamp(WIDTH / 2 + (sin((y - vsinephase) / 4) * 5), 0, WIDTH));
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graph[(int)y][x] = 'X';
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}
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/* hyperbola */
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for(double x = 0; x < WIDTH; ++x)
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{
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int y = (int)round(clamp(paraphase/x, 0, HEIGHT));
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graph[y][(int)x] = 'X';
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}
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//print the math correctly
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for(int y = HEIGHT - 1; y >= 0; --y)
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{
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while(is_term_resized(HEIGHT + 2, WIDTH + 2))
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{
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erase();
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refresh();
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usleep(300 * 1000);
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getmaxyx(stdscr, HEIGHT, WIDTH);
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WIDTH -= 2;
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HEIGHT -= 2;
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border('|', '|', '-', '-', '+', '+', '+', '+');
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if(is_term_resized(HEIGHT + 2, WIDTH + 2))
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goto whilestart;
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}
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for(int x = 0; x < WIDTH; ++x)
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{
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mvaddch(HEIGHT - y, x + 1, graph[y][x]);
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}
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}
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usleep(1000 / 30 * 1000);
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}
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// end
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end:
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curs_set(1);
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endwin();
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return 0;
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}
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