nyancat

commit c2c783fc3676b448f5555188501d5fa428c5b476
parent 37bc640e61bf2f5833dd5373bc5e8dbee99c5e43
Author: Santtu Lakkala <inz@inz.fi>
Date:   Mon, 20 Jul 2020 16:47:30 +0300

Add option for vertical rainbow

Diffstat:
M
nyancat.c
 | 
10
++++++++--

1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/nyancat.c b/nyancat.c
@@ -40,6 +40,7 @@ struct lolcat {
 	int h;
 	int sx;
 	int sy;
+	int transpose;
 	uint32_t fg;
 	uint32_t bg;
 	bool bg_set;
@@ -59,8 +60,10 @@ struct lolcat {
 	void *write_data;
 };
 
-int nyan(int x, int y)
+int nyan(int x, int y, bool transpose)
 {
+	if (transpose)
+		return sin(y * PI / 18) * 18 + x * 18;
 	return sin(x * PI / 18) * 18 + y * 18;
 }
 
@@ -388,7 +391,7 @@ static void _lc_colorize(struct lolcat *lc, const char *u8_char, size_t len)
 		col = _bold(lc->fg);
 	else
 		col = lc->fg;
-	col = _add(rainbow(0.03, nyan(lc->x, lc->y)), col, 0.5);
+	col = _add(rainbow(0.03, nyan(lc->x, lc->y, lc->transpose)), col, 0.5);
 
 	if (lc->mode == INDEXED16)
 		col = _index16(col, &lc->bold);
@@ -719,6 +722,9 @@ int main(int argc, char **argv)
 			case '2':
 				lc->mode = INDEXED256;
 				break;
+			case 'v':
+				lc->transpose = true;
+				break;
 			case 'h':
 			default:
 				usage();