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54 lines
921 B
C
54 lines
921 B
C
#include <ncurses.h>
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#include <unistd.h>
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#define MAX_X 100.0
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#define MAX_Y 100.0
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#define MAX_R 24
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#define MAX_C 80
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void xy2rc(float x, float y, int *r, int *c) {
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*c = (x / MAX_X) * MAX_C;
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*r = MAX_R - ((y / MAX_Y) * MAX_R);
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}
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float ball_x = 0.0;
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float ball_y = 0.0;
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float dir_x = +2.0;
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float dir_y = +1.0;
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void paint_ball() {
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int r, c;
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xy2rc(ball_x, ball_y, &r, &c);
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mvaddch(r, c, ACS_DIAMOND);
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}
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void paint() {
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clear();
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paint_ball();
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refresh();
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}
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int main() {
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initscr(); /* Start curses mode */
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curs_set(0); /* Disable cursor */
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while(true) {
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ball_x += dir_x;
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ball_y += dir_y;
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if (ball_x>MAX_X || ball_x<0) {
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dir_x = -dir_x;
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}
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if (ball_y>MAX_Y || ball_y<0) {
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dir_y = -dir_y;
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}
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paint();
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usleep(50000);
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}
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refresh(); /* Print it on to the real screen */
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getch(); /* Wait for user input */
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endwin(); /* End curses mode */
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}
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