Show scale.

src/slide/s6_fractals.rs

@@ -195,8 +195,8 @@ impl Slide for Fractals {
         };
 
         Frame::none().margin(Margin::same(20.0)).show(ui, |ui| {
-            fade_out(ui, all_fade_out_start, |ui| {
-                ui.vertical_centered(|ui| {
+            ui.vertical_centered(|ui| {
+                fade_out(ui, all_fade_out_start, |ui| {
                     ui.heading("Fractals");
                     let quote_fade_start = match &self.state {
                         FractalsState::Before | FractalsState::Grid { .. } | FractalsState::Erase { .. } | FractalsState::Axes { .. } | FractalsState::Rectangle { .. } | FractalsState::Circle { .. } => None,
@@ -331,14 +331,23 @@ impl Slide for Fractals {
                 let screen = ui.ctx().input().screen_rect();
                 *zoom = 3.0 * 0.95f32.powf(time * 10.0).max(0.0001);
                 let lerp = (time * 1.0).sqrt().min(1.0);
+                let center = Pos2::new(ultimate.x * lerp, ultimate.y * lerp);
                 accelerator.run(
-                    Pos2::new(ultimate.x * lerp, ultimate.y * lerp),
+                    center,
                     *zoom,
                     image,
                 );
                 //println!("zoom: {}", *zoom);
                 egui::Image::new(&ui.ctx().load_texture("zoom", image.clone()), Vec2::ZERO)
                     .paint_at(ui, screen);
+
+                fade_in(ui, all_fade_out_start, |ui| {
+                    ui.style_mut().visuals.widgets.noninteractive.fg_stroke.color = Color32::WHITE;
+                    ui.add_space(ui.available_height() - 50.0);
+                    ui.centered_and_justified(|ui| {
+                        ui.label(format!("Center: ({:.5}, {:.5}), Scale: {:.5}", center.x, center.y, *zoom))
+                    });
+                });
             }
         }