On Sun, May 15, 2022, 11:45 AM Undiscussed Horrific Abuse, One Victim of Many <gmkarl@gmail.com> wrote:
$ tput cup 2 2 | hd 00000000 1b 5b 33 3b 33 48 |.[3;3H| 00000006 $ tput cup 4 5 | hd 00000000 1b 5b 35 3b 36 48 |.[5;6H| 00000006
printf("\x1b\x5b%d;%dH", y, x);
#include <stdio.h> typedef struct pt { int x; int y; } pt; void plot(int x, int y, char c) { printf("\x1b\x5b%d;%dH%c", y, x, c); } pt pt1 = {20,10}; pt pt2 = {40,30}; pt pt3 = {0,30}; void line(pt a, pt b) { pt change = {b.x - a.x, b.y - a.y}; int ctx = change.x > 0 ? change.x : -change.x; int cty = change.y > 0 ? change.y : -change.y; int ct = ctx > cty ? ctx : cty; for (int t = 0; t <= ct; ++ t) { plot(a.x + change.x * t / ct, a.y + change.y * t / ct, '*'); } } int main() { line(pt1, pt2); line(pt2, pt3); line(pt3, pt1); }