add digit tool

src/marble_engine/board.rs

@@ -9,6 +9,15 @@ pub struct Pos {
 	pub y: isize,
 }
 
+impl Pos {
+	pub const fn to_vec(&self) -> Vector2 {
+		Vector2 {
+			x: self.x as f32,
+			y: self.y as f32,
+		}
+	}
+}
+
 impl From<(usize, usize)> for Pos {
 	fn from(value: (usize, usize)) -> Self {
 		Self {
@@ -91,7 +100,15 @@ impl Board {
 		}
 	}
 
-	pub fn get_mut(&mut self, p: Pos) -> &mut Tile {
+	pub fn get_mut(&mut self, p: Pos) -> Option<&mut Tile> {
+		if self.in_bounds(p) {
+			Some(&mut self.rows[p.y as usize][p.x as usize])
+		} else {
+			None
+		}
+	}
+
+	pub fn get_mut_unchecked(&mut self, p: Pos) -> &mut Tile {
 		if self.in_bounds(p) {
 			&mut self.rows[p.y as usize][p.x as usize]
 		} else {