84 lines
1.5 KiB
C
84 lines
1.5 KiB
C
#define _BSD_SOURCE
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#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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int mrow, mcol;
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getmaxyx(stdscr, mrow, mcol);
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*c = (x / MAX_X) * mcol;
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*r = mrow - ((y / MAX_Y) * mrow);
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}
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float lerp(float from, float to, float t) {
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return from + t * (to - from);
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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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float pad_l = 0.0;
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float pad_r = 0.0;
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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_paddles() {
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int r, c;
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xy2rc(0, pad_l, &r, &c);
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mvaddch(r, c, ACS_VLINE);
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xy2rc(MAX_X, pad_r, &r, &c);
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c--;
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mvaddch(r, c, ACS_VLINE);
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}
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void paint() {
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clear();
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paint_paddles();
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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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/* Awesome artificial intelligence working here. */
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if (ball_x < 0.25f * MAX_X) {
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pad_l = lerp(pad_l, ball_y, 0.3);
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}
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if (ball_x > 0.75f * MAX_X) {
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pad_r = lerp(pad_r, ball_y, 0.3);
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}
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paint();
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usleep(50000);
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}
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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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