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https://github.com/slint-ui/slint.git
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6d9763a080
Make the slider change the amplitude of the graph, and the pitch and yaw can be changed by dragging the graph
84 lines
2.5 KiB
Rust
84 lines
2.5 KiB
Rust
// Copyright © SixtyFPS GmbH <info@sixtyfps.io>
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// SPDX-License-Identifier: (GPL-3.0-only OR LicenseRef-SixtyFPS-commercial)
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use plotters::prelude::*;
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use sixtyfps::SharedPixelBuffer;
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#[cfg(target_arch = "wasm32")]
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use wasm_bindgen::prelude::*;
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#[cfg(target_arch = "wasm32")]
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mod wasm_backend;
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sixtyfps::sixtyfps! {
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import { MainWindow } from "plotter.60";
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}
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fn pdf(x: f64, y: f64, a: f64) -> f64 {
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const SDX: f64 = 0.1;
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const SDY: f64 = 0.1;
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let x = x as f64 / 10.0;
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let y = y as f64 / 10.0;
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a * (-x * x / 2.0 / SDX / SDX - y * y / 2.0 / SDY / SDY).exp()
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}
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fn render_plot(pitch: f32, yaw: f32, amplitude: f32) -> sixtyfps::Image {
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let mut pixel_buffer = SharedPixelBuffer::new(640, 480);
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let size = (pixel_buffer.width(), pixel_buffer.height());
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let backend = BitMapBackend::with_buffer(pixel_buffer.make_mut_bytes(), size);
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// Plotters requires TrueType fonts from the file system to draw axis text - we skip that for
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// WASM for now.
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#[cfg(target_arch = "wasm32")]
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let backend = wasm_backend::BackendWithoutText { backend };
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let root = backend.into_drawing_area();
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root.fill(&WHITE).expect("error filling drawing area");
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let mut chart = ChartBuilder::on(&root)
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.build_cartesian_3d(-3.0..3.0, 0.0..6.0, -3.0..3.0)
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.expect("error building coordinate system");
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chart.with_projection(|mut p| {
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p.pitch = pitch as f64;
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p.yaw = yaw as f64;
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p.scale = 0.7;
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p.into_matrix() // build the projection matrix
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});
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chart.configure_axes().draw().expect("error drawing");
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chart
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.draw_series(
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SurfaceSeries::xoz(
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(-15..=15).map(|x| x as f64 / 5.0),
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(-15..=15).map(|x| x as f64 / 5.0),
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|x, y| pdf(x, y, amplitude as f64),
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)
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.style_func(&|&v| {
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(&HSLColor(240.0 / 360.0 - 240.0 / 360.0 * v / 5.0, 1.0, 0.7)).into()
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}),
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)
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.expect("error drawing series");
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root.present().expect("error presenting");
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drop(chart);
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drop(root);
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sixtyfps::Image::from_rgb8(pixel_buffer)
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}
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#[cfg_attr(target_arch = "wasm32", wasm_bindgen(start))]
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pub fn main() {
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// This provides better error messages in debug mode.
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// It's disabled in release mode so it doesn't bloat up the file size.
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#[cfg(all(debug_assertions, target_arch = "wasm32"))]
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console_error_panic_hook::set_once();
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let main_window = MainWindow::new();
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main_window.on_render_plot(render_plot);
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main_window.run();
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}
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