From ab4794fb59d94fae0229e43e542b184a2d91284a Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Wed, 23 Sep 2026 19:53:40 +0300
Subject: [PATCH] add animation

---
 src/main.rs | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 9c2adba..78117c3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -92,38 +92,54 @@ fn main() {
 	const OFF_SAT: f32 = R_SUN + R_SAT;
 	const R_SKY: f32 = R_SCALE * N_TEETH_SKY as f32;
 
+	const FPS: f32 = 60.0;
+	const V_SUN: f32 = 2.0;
+	const V_SKY: f32 = -1.0;
+
+	const V_SAT: f32 = (V_SKY - V_SUN) / 2.0;
+	const V_ORBIT: f32 = (V_SUN + V_SKY) / 2.0;
+
+	const W_SUN: f32 = V_SUN / N_TEETH_SUN as f32;
+	const W_SKY: f32 = V_SKY / N_TEETH_SKY as f32;
+	const W_SAT: f32 = V_SAT / N_TEETH_SAT as f32;
+	const W_ORBIT: f32 = V_ORBIT / (N_TEETH_SUN + N_TEETH_SAT) as f32;
+
 	with_2d_graphics(|| {
 		let sun = gear_shape(N_TEETH_SUN);
 		let sat = gear_shape(N_TEETH_SAT);
 		let crown = gear_shape_outer(N_TEETH_SKY);
 
 		let (canvas, mut events) = create_drawing_window_with_events("Canvas window");
+		let mut frame = 0;
 		'main: loop {
 			while let Poll::Ready(event) =
 				events.poll_next_unpin(&mut Context::from_waker(Waker::noop()))
 			{
 				let Some(_event) = event else { break 'main };
 			}
+			let t = frame as f32 / FPS;
 			canvas.draw(|gc| {
 				gc.clear_canvas(Rgba(0.1, 0.1, 0.1, 1.0));
 
 				gc.canvas_height(100.0);
 				gc.line_width(0.25);
 
+				let m = Mat2::from_angle(t * W_SUN + 1.0 / N_TEETH_SUN as f32 * PI);
 				gc.new_path();
 				for pt in &sun {
-					let pt = R_SUN * pt;
+					let pt = R_SUN * m * pt;
 					gc.line_to(pt.x, pt.y);
 				}
 				gc.close_path();
 				gc.stroke_color(Rgba(0.8, 0.7, 0.1, 1.0));
 				gc.stroke();
 
+				let mr = Mat2::from_angle(t * W_SAT);
 				for k in 0..N_SAT {
-					let m = Mat2::from_angle(k as f32 / N_SAT as f32 * 2. * PI);
+					let mo = Mat2::from_angle(t * W_ORBIT + k as f32 / N_SAT as f32 * 2. * PI);
 					gc.new_path();
 					for pt in &sat {
-						let pt = m * vec2(OFF_SAT, 0.) + R_SAT * pt;
+						let pt = mo * vec2(OFF_SAT, 0.) + R_SAT * mr * pt;
 						gc.line_to(pt.x, pt.y);
 					}
 					gc.close_path();
@@ -131,15 +147,17 @@ fn main() {
 					gc.stroke();
 				}
 
+				let m = Mat2::from_angle(t * W_SKY);
 				gc.new_path();
 				for pt in &crown {
-					let pt = R_SKY * pt;
+					let pt = R_SKY * m * pt;
 					gc.line_to(pt.x, pt.y);
 				}
 				gc.close_path();
 				gc.stroke_color(Rgba(0.1, 0.4, 0.8, 1.0));
 				gc.stroke();
 			});
+			frame += 1;
 		}
 	});
 }