diff options
| -rw-r--r-- | examples/game_of_life/src/main.rs | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/examples/game_of_life/src/main.rs b/examples/game_of_life/src/main.rs index 92500309..c818d99f 100644 --- a/examples/game_of_life/src/main.rs +++ b/examples/game_of_life/src/main.rs @@ -292,7 +292,21 @@ mod grid { if y < 0.0 && self.scaling > Self::MIN_SCALING || y > 0.0 && self.scaling < Self::MAX_SCALING { - self.scaling = (self.scaling + y / 30.0) + let factor = y / 30.0; + + if let Some(cursor_to_center) = + cursor.position_from(bounds.center()) + { + self.translation = self.translation + - Vector::new( + cursor_to_center.x * factor + / (self.scaling * self.scaling), + cursor_to_center.y * factor + / (self.scaling * self.scaling), + ); + } + + self.scaling = (self.scaling + factor) .max(Self::MIN_SCALING) .min(Self::MAX_SCALING); |