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+ }, + "jiti": { + "optional": true + }, + "less": { + "optional": true + }, + "sass": { + "optional": true + }, + "sass-embedded": { + "optional": true + }, + "stylus": { + "optional": true + }, + "sugarss": { + "optional": true + }, + "terser": { + "optional": true + }, + "tsx": { + "optional": true + }, + "yaml": { + "optional": true + } + } } } } diff --git a/package.json b/package.json index 1e02a41..2fcdc00 100644 --- a/package.json +++ b/package.json @@ -8,9 +8,15 @@ }, "license": "SEE LICENSE IN LICENSE", "author": "Oscar Giacalone", - "type": "commonjs", + "type": "module", "main": "index.js", "scripts": { + "dev": "vite", + "build": "vite build", "test": "echo \"Error: no test specified\" && exit 1" + }, + "dependencies": { + "pdf-lib": "^1.17.1", + "vite": "^8.3.2" } } diff --git a/index.js b/src/main.js similarity index 64% rename from index.js rename to src/main.js index c0105f2..8eb5e64 100644 --- a/index.js +++ b/src/main.js @@ -1,3 +1,5 @@ +import * as maths from "./maths.js"; + let uInput = document.getElementById("u"); let hInput = document.getElementById("h"); let rInput = document.getElementById("r"); @@ -13,7 +15,6 @@ let spillRadius = 0; let numberOfPanels = 0; let multiplier = 1; -let accuracy = 8; let step = 0.001 * multiplier; // const offset = 3*10**-15 * multiplier; @@ -30,39 +31,7 @@ let unit = "px"; let strokeWidth = 1; // maths -function approx(n) { - return Math.round(n * (10 ** accuracy)) / (10 ** accuracy); -} -function f(x) { - res = approx(height * Math.sqrt((1 - (Math.pow(x, 2) / Math.pow(radius, 2))))); - console.log(`f ${x} ${res}`); - return res; -} - -function fprime(x) { - res = approx(-1 * ((Math.pow(height, 2) * x) / (Math.pow(radius, 2) * f(x)))); - console.log(`fprime ${x} ${res}`); - return res; -} - -function g(x, P) { - res = approx(fprime(x) * (x - P.x) + P.y); - console.log(`g ${x} ${P.x} ${P.y} ${res}`); - return res; -} - -function j(A, B) { - res = approx(A.x * fprime(A.x) - B.x * fprime(B.x) - A.y + B.y) / (fprime(A.x) - fprime(B.x)); - console.log(`j ${A.x} ${A.y} ${B.x} ${B.y} ${res}`); - return res; -} - -function d(A, B) { - res = approx(Math.sqrt(Math.pow(A.x - B.x, 2) + Math.pow(A.y - B.y, 2))); - console.log(`d ${A.x} ${A.y} ${B.x} ${B.y} ${res}`); - return res; -} // logic function getValues() { @@ -85,27 +54,27 @@ function getValues() { function getPoints() { for (let x = spillRadius; x < radius; x += step - offset) { - x = approx(x); + x = maths.approx(x); pointsP.push({ x: x, - y: f(x) + y: maths.f(x, height, radius) }); } } function getPointsOfTangentIntersection() { for (let i = 0; i < n; i++) { - console.log(`${i}, ${pointsP[i]}, ${pointsP[i + 1]}`); + console.log(`${i}, ${pointsP[i].x} ${pointsP[i].y}, ${pointsP[i + 1].x} ${pointsP[i+1].y}`); pointsQ.push({ - x: j(pointsP[i], pointsP[i + 1]), - y: g(j(pointsP[i], pointsP[i + 1]), pointsP[i + 1]) + x: maths.j(pointsP[i], pointsP[i + 1], height, radius), + y: maths.g(maths.j(pointsP[i], pointsP[i + 1], height, radius), pointsP[i + 1], height, radius) }); } } function getDistancesBetweenIntersections() { for (let i = 0; i < n - 1; i++) { - distances.push(d(pointsQ[i], pointsQ[i + 1])); + distances.push(maths.d(pointsQ[i], pointsQ[i + 1], height, radius)); } } @@ -113,7 +82,7 @@ function generateCoordinates() { let Xi = 0; for (let i = 0; i < n - 2; i++) { Xi += distances[i]; - Yi = (Math.PI * pointsQ[i].x) / numberOfPanels; + let Yi = (Math.PI * pointsQ[i].x) / numberOfPanels; panelPoints.push({ x: Xi, y: Yi @@ -140,8 +109,8 @@ function plotSVG() { let pointsB = ""; for (let i = 0; i < panelPoints.length; i++) { let point = panelPoints[i]; - pointsA += `${approx(point.x)},${(maxY) - approx(point.y)} `; - pointsB +=`${approx(point.x)},${approx((point.y + maxY))} `; + pointsA += `${maths.approx(point.x)},${(maxY) - maths.approx(point.y)} `; + pointsB +=`${maths.approx(point.x)},${maths.approx((point.y + maxY))} `; } outputdiv.innerHTML = ` `; - lenOutput.innerText = `Recommended length: ${approx(maxX - minX)} ${unit}`; + lenOutput.innerText = `Recommended length: ${maths.approx(maxX - minX)} ${unit}`; } @@ -205,4 +174,5 @@ function generatePanel() { plotSVG(); } +document.getElementById("generate").addEventListener("click", () => generatePanel()); diff --git a/src/maths.js b/src/maths.js new file mode 100644 index 0000000..7d1084f --- /dev/null +++ b/src/maths.js @@ -0,0 +1,63 @@ +import { sanitiseArguments } from "./utils"; + +let accuracy = import.meta.env.VITE_ACCURACY; + +export function approx(n) { + return Math.round(n * (10 ** accuracy)) / (10 ** accuracy); +} + +// calculate y co-ordinate of point on ellipse at x +// x: x co-ordinate +// h: height of ellipse +// r: radius of spill hole +export function f(x, h, r) { + sanitiseArguments(x,h,r) + let res = approx(h * Math.sqrt((1 - (Math.pow(x, 2) / Math.pow(r, 2))))); + console.log(`f(${x} ${h} ${r}) ${res}`); + return res; +} + +// calculate the gradient of the ellipse at a given point x +// x: x co-ordinate of point +// h: height of ellipse +// r: radius of spill hole +export function fprime(x, h, r) { + sanitiseArguments(x,h,r) + let res = approx(-1 * ((Math.pow(h, 2) * x) / (Math.pow(r, 2) * f(x, h, r)))); + console.log(`fprime (${x} ${h} ${r}) ${res}`); + return res; +} + +// calculate the y co-ordinate of the point on the tangent at P to an ellipse at x +// x: x co-ordinate along tangent +// P: (x,y) for the point on the ellipse the tangent is from +// h: height of ellipse +// r: radius of spill hole +export function g(x, P, h, r) { + sanitiseArguments(x,P.x, P.y,h,r) + let res = approx(fprime(x, h, r) * (x - P.x) + P.y); + console.log(`g (${x} {${P.x} ${P.y}} ${h} ${r}) ${res}`); + return res; +} + +// find the intersection between two tangents of an ellipse +// A: (x,y) for the point of the ellipse for the first tangent +// B: (x,y) for the point of the ellipse for the second tangent +// h: height of the ellipse +// r: radius of the spill hole +export function j(A, B, h, r) { + sanitiseArguments(A.x, A.y, B.x, B.y, h,r) + let res = approx(A.x * fprime(A.x, h, r) - B.x * fprime(B.x, h, r) - A.y + B.y) / (fprime(A.x, h, r) - fprime(B.x, h, r)); + console.log(`j ({${A.x} ${A.y}} {${B.x} ${B.y}} ${h} ${r}) ${res}`); + return res; +} + +// find the distance between two points +// A: (x,y) the first point +// B: (x,y) the second point +export function d(A, B) { + sanitiseArguments(A.x, A.y, B.x, B.y) + let res = approx(Math.sqrt(Math.pow(A.x - B.x, 2) + Math.pow(A.y - B.y, 2))); + console.log(`d ({${A.x} ${A.y}} {${B.x} ${B.y}}) ${res}`); + return res; +} diff --git a/src/utils.js b/src/utils.js new file mode 100644 index 0000000..1d7dc94 --- /dev/null +++ b/src/utils.js @@ -0,0 +1,7 @@ +export function sanitiseArguments(...args) { + for (let i = 0; i < args.length; i++) { + if (args[i] == undefined || args[i] == NaN) { + throw new Error(`bad argument: ${args}`); + } + } +} diff --git a/vite.config.js b/vite.config.js new file mode 100644 index 0000000..4010cdc --- /dev/null +++ b/vite.config.js @@ -0,0 +1,5 @@ +import { defineConfig } from "vite"; + +export default defineConfig({ + base: "" +});