1 files changed, 12 insertions, 0 deletions
diff --git a/board.c b/board.c
index 7aceed6..94dd764 100644
--- a/board.c
+++ b/board.c
@@ -52,6 +52,18 @@ void init_board()
 	init_rings();
 }
 
+struct ccoords pol_to_cart(struct pcoords c)
+{
+	double t = c.a * (M_PI / 180);
+	return (struct ccoords){ .x = c.r * cos(t), .y = c.r * sin(t) };
+}
+
+struct pcoords cart_to_pol(struct ccoords c)
+{
+	return (struct pcoords){ .a = atan2(c.y, c.x) * (180 / M_PI),
+		.r = sqrt(pow(c.x, 2) + pow(c.y, 2)) };
+}
+
 static int sector_from_angle(double angle)
 {
 	double shifted = angle - 90 - (SECTOR_WIDTH / 2);