78 lines
2.8 KiB
Rust
78 lines
2.8 KiB
Rust
use std::f64::consts::PI as PI;
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use sycamore::{prelude::*, rt::{JsCast, JsValue}};
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use web_sys::window;
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mod engine;
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fn main() {
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// set up a config option that forwards panic messages to `console.error`
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#[cfg(feature = "console_error_panic_hook")]
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console_error_panic_hook::set_once();
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sycamore::render(|| {
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let time_res: usize = 100;
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let time_step = create_signal(0.0);
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let run_time_report = create_signal(-1.0);
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let display = create_node_ref();
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on_mount(move || {
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let performance = window().unwrap().performance().unwrap();
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let start_time = performance.now();
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/*let eigval_series = engine::rand_eigval_series::<U60>(time_res);*/
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let eigval_series = engine::rand_eigval_series(60, time_res);
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let run_time = performance.now() - start_time;
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run_time_report.set(run_time);
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let canvas = display
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.get::<DomNode>()
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.unchecked_into::<web_sys::HtmlCanvasElement>();
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let ctx = canvas
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.get_context("2d")
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.unwrap()
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.unwrap()
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.dyn_into::<web_sys::CanvasRenderingContext2d>()
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.unwrap();
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ctx.set_fill_style(&JsValue::from("white"));
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create_effect(move || {
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// center and normalize the coordinate system
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let width = canvas.width() as f64;
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let height = canvas.height() as f64;
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ctx.set_transform(1.0, 0.0, 0.0, -1.0, 0.5*width, 0.5*height).unwrap();
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// clear the previous frame
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ctx.clear_rect(-0.5*width, -0.5*width, width, height);
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// find the resolution
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const R_DISP: f64 = 1.5;
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let res = width / (2.0*R_DISP);
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// draw the eigenvalues
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let eigvals = &eigval_series[time_step.get() as usize];
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for n in 0..eigvals.len() {
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ctx.begin_path();
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ctx.arc(
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/* typecast only needed for single float version */
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res * f64::from(eigvals[n].re),
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res * f64::from(eigvals[n].im),
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3.0,
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0.0, 2.0*PI
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).unwrap();
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ctx.fill();
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}
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});
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});
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view! {
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div(id="app") {
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div { (run_time_report.get()) " ms" }
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canvas(ref=display, width="600", height="600")
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input(
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type="range",
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max=(time_res - 1).to_string(),
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bind:valueAsNumber=time_step
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)
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}
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}
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});
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} |