From fdc957cae7f5efca792b40df7ff90ec4f512269b Mon Sep 17 00:00:00 2001
From: brian cully <bjc@spork.org>
Date: Sat, 27 Dec 2025 16:53:11 -0500
Subject: get wasm go button working

---
 src/state.rs | 31 ++++---------------------------
 1 file changed, 4 insertions(+), 27 deletions(-)

(limited to 'src/state.rs')

diff --git a/src/state.rs b/src/state.rs
index 4adb952..f5435f5 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -10,49 +10,27 @@ use crate::point::Point;
 pub const TAU: f64 = PI * 2.0;
 pub const MAX_SPEED: f64 = 0.01;
 
-const NUM_POINTS: usize = 40;
+const NUM_POINTS: usize = 10;
 const VELVEC_SCALE: f64 = 3.0;
 
-fn window() -> web_sys::Window {
-    web_sys::window().expect("no window")
-}
-
-fn document() -> web_sys::Document {
-    window().document().expect("no document")
-}
-
-fn canvas() -> Result<web_sys::HtmlCanvasElement, JsValue> {
-    let x = document()
-        .query_selector("canvas")?
-        .expect("canvas element");
-    Ok(x.dyn_into::<web_sys::HtmlCanvasElement>()?)
-}
-
 #[derive(Debug)]
 pub struct State {
     canvas: HtmlCanvasElement,
     ctx: CanvasRenderingContext2d,
     fps: HtmlElement,
     points: Vec<Point>,
-    pub paused: bool,
     last_time: Option<f64>,
     inter_count: u16,
 }
 
 impl State {
-    pub fn new() -> Result<Self, JsValue> {
+    pub fn new(canvas: HtmlCanvasElement, fps: HtmlElement) -> Result<Self, JsValue> {
         debug!("State::new()");
-        let canvas = canvas()?;
         let ctx: CanvasRenderingContext2d = canvas
             .get_context("2d")?
             .expect("2d context on canvas")
             .dyn_into()?;
         ctx.scale(canvas.width().into(), canvas.height().into())?;
-        let fps = document()
-            .query_selector("#fps")?
-            .expect("fps counter exists")
-            .dyn_into::<HtmlElement>()
-            .expect("is html element");
 
         let points = (0..NUM_POINTS)
             .map(|_| Point::new(fastrand::f64(), fastrand::f64()))
@@ -63,8 +41,7 @@ impl State {
             ctx,
             fps,
             points,
-            paused: false,
-            last_time: document().timeline().current_time(),
+            last_time: None,
             inter_count: 1,
         })
     }
@@ -75,12 +52,12 @@ impl State {
                 let ic: f64 = self.inter_count.into();
                 let val: f64 = (1_000.0 * ic / (t - last_time)).trunc();
                 self.fps.set_text_content(Some(val.to_string().as_str()));
-                self.last_time = Some(t);
                 self.inter_count = 1;
             } else {
                 self.inter_count += 1;
             }
         }
+        self.last_time = Some(t);
 
         self.ctx.clear_rect(
             0.0,
-- 
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