From 1bd2f919a8c36e640971bc9c4ffa6ed8881e1bd8 Mon Sep 17 00:00:00 2001 From: Simon Gardling Date: Thu, 10 Feb 2022 17:44:29 -0500 Subject: [PATCH] init --- .gitignore | 8 + Cargo.toml | 15 + LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++ src/func_plot.rs | 81 +++++ src/lib.rs | 48 +++ start-server.sh | 23 ++ www/bootstrap.js | 20 ++ www/index.html | 45 +++ www/index.js | 84 ++++++ www/package.json | 18 ++ www/style.css | 55 ++++ www/webpack.config.js | 14 + 12 files changed, 1085 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.toml create mode 100644 LICENSE create mode 100644 src/func_plot.rs create mode 100644 src/lib.rs create mode 100755 start-server.sh create mode 100644 www/bootstrap.js create mode 100644 www/index.html create mode 100644 www/index.js create mode 100644 www/package.json create mode 100644 www/style.css create mode 100644 www/webpack.config.js diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9770e5d --- /dev/null +++ b/.gitignore @@ -0,0 +1,8 @@ +/target +Cargo.lock +/pkg +package-lock.json +/www/pkg +/www/package-lock.json +/www/node_modules +/www/dist \ No newline at end of file diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..aaea901 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,15 @@ +[package] +name = "integral_site" +version = "0.1.0" +edition = "2021" + +[lib] +crate-type=["cdylib"] + +[dependencies] +wasm-bindgen = "0.2.79" +plotters = "0.3.1" +plotters-canvas = "0.3.0" +wee_alloc = "0.4.5" +web-sys = { version = "0.3.56", features = ["HtmlCanvasElement"] } +meval = "0.2" \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..514899c --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) 2021 Titaniumtown + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/src/func_plot.rs b/src/func_plot.rs new file mode 100644 index 0000000..136c6d8 --- /dev/null +++ b/src/func_plot.rs @@ -0,0 +1,81 @@ +use crate::DrawResult; +use plotters::prelude::*; +use plotters_canvas::CanvasBackend; +use web_sys::HtmlCanvasElement; +use meval::Expr; + +/// Draw power function f(x) = x^power. +pub fn draw(element: HtmlCanvasElement, func_str: &str, minX: f32, maxX: f32, minY: f32, maxY: f32, num_interval: usize, resolution: i32) -> DrawResult<(impl Fn((i32, i32))-> Option<(f32, f32)>, f32)> { + let expr: Expr = func_str.parse().unwrap(); + let func = expr.bind("x").unwrap(); + + let absrange = (maxX-minX).abs(); + let step = absrange/(num_interval as f32); + let backend = CanvasBackend::with_canvas_object(element).unwrap(); + + let root = backend.into_drawing_area(); + let font: FontDesc = ("sans-serif", 20.0).into(); + + root.fill(&WHITE)?; + + let mut chart = ChartBuilder::on(&root) + .margin(20 as f32) + .caption(format!("y={}", func_str), font) + .x_label_area_size(30 as f32) + .y_label_area_size(30 as f32) + .build_cartesian_2d(minX..maxX, minY..maxY)?; + + chart.configure_mesh().x_labels(3).y_labels(3).draw()?; + + let data = (1..=resolution) + .map(|x| (((x as f32/resolution as f32))*(&absrange))+&minX) + .map(|x| (x, func(x as f64) as f32)) + .filter(|(_,y)| &minY <= y && y <= &maxY); + + chart.draw_series(LineSeries::new(data, &RED))?; + + let (data2, area) = integral_rectangles(minX, minY, maxY, absrange, step, num_interval, &func); // Get rectangle coordinates and the total area + + // Draw rectangles + chart.draw_series(data2.iter().map(|(x1, x2, y)| Rectangle::new([(*x2, *y), (*x1, 0.0)], &BLUE)))?; + + root.present()?; + let output = chart.into_coord_trans(); + return Ok(((output), area)); +} + +// Creates and does the math for creating all the rectangles under the graph +#[inline(always)] +fn integral_rectangles(minX: f32, minY: f32, maxY: f32, absrange: f32, step: f32, num_interval: usize, func: &dyn Fn(f64) -> f64) -> (Vec<(f32, f32, f32)>, f32) { + let mut area: f32 = 0.0; // sum of all rectangles' areas + let mut tmp1: f32; // Top left Y value that's tested + let mut tmp2: f32; // Top right Y value that's tested + let mut x2: f32; // X value of the right side of the rectangle + let mut y: f32; // Y value of the top of the rectangle + let mut x: f32; // X value of the left side of the rectangle + let mut data2: Vec<(f32, f32, f32)> = Vec::new(); + for e in 0..num_interval { + x = ((e as f32)*step)+minX; + + if x > 0.0 { + x2 = x+step; + } else { + x2 = x-step; + } + tmp1 = func(x as f64) as f32; + tmp2 = func(x2 as f64) as f32; + + if tmp2.abs() > tmp1.abs() { + y = tmp1; + } else { + y = tmp2; + } + + // Add current rectangle's area to the total + if !y.is_nan() { + area += y*step; + data2.push((x, x2, y)); + } + } + return (data2, area); +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..133286d --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,48 @@ +use wasm_bindgen::prelude::*; +use web_sys::HtmlCanvasElement; +mod func_plot; +use meval::Expr; + +#[global_allocator] +static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT; + +pub type DrawResult = Result>; + +#[wasm_bindgen] +pub struct Chart { + convert: Box Option<(f32, f32)>>, + area: f32 +} + +/// Result of screen to chart coordinates conversion. +#[wasm_bindgen] +pub struct Point { + pub x: f32, + pub y: f32, +} + +#[wasm_bindgen] +impl Chart { + pub fn draw(canvas: HtmlCanvasElement, func: &str, minX: f32, maxX: f32, minY: f32, maxY: f32, num_interval: usize, resolution: i32) -> Result { + let output = func_plot::draw(canvas, func, minX, maxX, minY, maxY, num_interval, resolution).map_err(|err| err.to_string())?; + let map_coord = output.0; + Ok(Chart { + convert: Box::new(move |coord| map_coord(coord).map(|(x, y)| (x.into(), y.into()))), + area: output.1, + }) + } + + pub fn get_area(&self) -> Result { + return Ok(self.area); + } + + // Does actual calculation of antiderivative + // pub fn actual_area(power: f32, minX: f32, maxX: f32) -> Result { + // let newpower = power + 1.0; + // return Ok((maxX.powf(newpower as f32)/newpower) - (minX.powf(newpower as f32)/newpower)); + // } + + pub fn coord(&self, x: i32, y: i32) -> Option { + (self.convert)((x, y)).map(|(x, y)| Point { x, y }) + } +} diff --git a/start-server.sh b/start-server.sh new file mode 100755 index 0000000..d8ba0e6 --- /dev/null +++ b/start-server.sh @@ -0,0 +1,23 @@ +#!/bin/bash +set -e + +CONFIG=release +mkdir -p www/pkg + +rustup target add wasm32-unknown-unknown + +if [ -z "$(cargo install --list | grep wasm-pack)" ] +then + cargo install wasm-pack +fi + +if [ "${CONFIG}" = "release" ] +then + wasm-pack build +else + wasm-pack build --release +fi + +cd www +npm install +npm start diff --git a/www/bootstrap.js b/www/bootstrap.js new file mode 100644 index 0000000..729a523 --- /dev/null +++ b/www/bootstrap.js @@ -0,0 +1,20 @@ +init(); + +async function init() { + if (typeof process == "object") { + const [{Chart}, {main, setup}] = await Promise.all([ + import("integral_site"), + import("./index.js"), + ]); + setup(Chart); + main(); + } else { + const [{Chart, default: init}, {main, setup}] = await Promise.all([ + import("../pkg/integral_site.js"), + import("./index.js"), + ]); + await init(); + setup(Chart); + main(); + } +} diff --git a/www/index.html b/www/index.html new file mode 100644 index 0000000..4708a41 --- /dev/null +++ b/www/index.html @@ -0,0 +1,45 @@ + + + + + + Integral Demonstration + + + + + +
+

Integral Demonstration

+
+ +
Loading WebAssembly...
+
+ +

+ +

+ +

+ +

+ +

+ +

+ +

+
+
Area:
+
+ + + +

Supported Expressions:

+ +
    +

  • sqrt, abs

    • +

  • exp, ln, log10

    • +

  • sin, cos, tan, asin, acos, atan, atan2

    • +

  • sinh, cosh, tanh, asinh, acosh, atanh

    • +

  • floor, ceil, round

    • diff --git a/www/index.js b/www/index.js new file mode 100644 index 0000000..447e337 --- /dev/null +++ b/www/index.js @@ -0,0 +1,84 @@ +// If you only use `npm` you can simply +// import { Chart } from "wasm-demo" and remove `setup` call from `bootstrap.js`. +class Chart {} + +const canvas = document.getElementById("canvas"); +const coord = document.getElementById("coord"); +const math_function = document.getElementById("math_function"); +const status = document.getElementById("status"); + +const minX = document.getElementById("minX"); +const maxX = document.getElementById("maxX"); +const minY = document.getElementById("minY"); +const maxY = document.getElementById("maxY"); +const num_interval = document.getElementById("num_interval"); +const area_msg = document.getElementById("area-msg"); +const resolution = document.getElementById("resolution"); + +let chart = null; + +/** Main entry point */ +export function main() { + setupUI(); + setupCanvas(); +} + +/** This function is used in `bootstrap.js` to setup imports. */ +export function setup(WasmChart) { + Chart = WasmChart; +} + +/** Add event listeners. */ +function setupUI() { + status.innerText = "WebAssembly loaded!"; + math_function.addEventListener("change", updatePlot); + minX.addEventListener("input", updatePlot); + maxX.addEventListener("input", updatePlot); + minY.addEventListener("input", updatePlot); + maxY.addEventListener("input", updatePlot); + num_interval.addEventListener("input", updatePlot); + resolution.addEventListener("input", updatePlot); + + window.addEventListener("resize", setupCanvas); + window.addEventListener("mousemove", onMouseMove); +} + +function setupCanvas() { + const aspectRatio = canvas.width / canvas.height; + const size = canvas.parentNode.offsetWidth * 0.8; + canvas.style.width = size + "px"; + canvas.style.height = size / aspectRatio + "px"; + canvas.width = size; + canvas.height = size / aspectRatio; + updatePlot(); +} + +function onMouseMove(event) { + if (chart) { + var text = "Mouse is outside Chart."; + + if(event.target == canvas) { + let actualRect = canvas.getBoundingClientRect(); + let logicX = event.offsetX * canvas.width / actualRect.width; + let logicY = event.offsetY * canvas.height / actualRect.height; + const point = chart.coord(logicX, logicY); + text = (point) + ? `(${point.x.toFixed(3)}, ${point.y.toFixed(3)})` + : text; + } + coord.innerText = text; + } +} + +function updatePlot() { + status.innerText = `Rendering y=${math_function.value}...`; + chart = null; + const start = performance.now(); + + chart = Chart.draw(canvas, math_function.value, Number(minX.value), Number(maxX.value), Number(minY.value), Number(maxY.value), Number(num_interval.value), Number(resolution.value)); + const end = performance.now(); + + area_msg.innerText = `Estimated Area: ${chart.get_area()}`; + + status.innerText = `Rendered ${math_function.innerText} in ${Math.ceil(end - start)}ms`; +} diff --git a/www/package.json b/www/package.json new file mode 100644 index 0000000..cc5e5cd --- /dev/null +++ b/www/package.json @@ -0,0 +1,18 @@ +{ + "name": "integral_site", + "version": "0.1.0", + "main": "index.js", + "scripts": { + "build": "webpack --config webpack.config.js", + "start": "webpack-dev-server" + }, + "dependencies": { + "integral_site": "file:../pkg" + }, + "devDependencies": { + "webpack": "^4.43.0", + "webpack-cli": "^3.3.11", + "webpack-dev-server": "^3.10.3", + "copy-webpack-plugin": "^5.0.0" + } +} diff --git a/www/style.css b/www/style.css new file mode 100644 index 0000000..404d385 --- /dev/null +++ b/www/style.css @@ -0,0 +1,55 @@ +html, body, main { + width: 100%; + margin: 0; + padding: 0; +} + +body { + margin: auto; + max-width: 800px; + display: flex; + flex-direction: column; +} + +@media (max-width: 800px) { + body { + padding: 10px; + box-sizing: border-box; + } +} + +main { + display: flex; + flex-direction: column; + align-items: center; +} + +#coord, #status { + color: grey; + font-size: 10px; + height: 15px +} + +#control { + margin-top: 1em; +} + +#control label { + font-weight: bold; + margin-right: 1em; +} + +#control select { + padding: 0.25em 0.5em; +} + +footer { + margin-top: 2em; + font-size: 12px; + text-align: center; +} + +.hide { + visibility: hidden; + height: 0px; +} diff --git a/www/webpack.config.js b/www/webpack.config.js new file mode 100644 index 0000000..80ad814 --- /dev/null +++ b/www/webpack.config.js @@ -0,0 +1,14 @@ +const CopyWebpackPlugin = require("copy-webpack-plugin"); +const path = require('path'); + +module.exports = { + entry: "./bootstrap.js", + output: { + path: path.resolve(__dirname, "dist"), + filename: "bootstrap.js", + }, + mode: "development", + plugins: [ + new CopyWebpackPlugin(['index.html']) + ], +};