diff --git a/digest.txt b/digest.txt new file mode 100644 index 0000000..f485cd0 --- /dev/null +++ b/digest.txt @@ -0,0 +1,889 @@ +Directory structure: +└── Лаб1/ + ├── README.md + ├── index.html + ├── LICENSE + ├── script.js + ├── tasks.md + └── docs/ + ├── requirements.md + └── task.md + +================================================ +FILE: README.md +================================================ +# Web Programming: Lab 1 + +This is a client-side web app that checks if a given 2D point (X, Y) falls inside a specific graphed area based on a given radius (R). + +## Functions +You basically pick your coordinates, set a radius, and hit submit. The app calculates whether your point landed directly inside the colored shapes on the graph or missed them entirely. + +## How to Run It +1. Download the files. +2. Double-click `index.html` to open it in your browser. +3. That's pretty much it. + +## Project Structure +- `index.html` — The main layout holding the UI and embedded CSS styled. +- `script.js` — Vanilla JavaScript: Canvas rendering, math checking, and validations. +- `assets/` — Try to guess. +- `docs/` — Assignment instructions. + + + +================================================ +FILE: index.html +================================================ + + + + + + Лабораторная работа №1 + + + + + + + + + + + + + + + +
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+ +Toasty + + + + + + + + +================================================ +FILE: LICENSE +================================================ +GNU GENERAL PUBLIC LICENSE +Version 3, 29 June 2007 + +Copyright © 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. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. 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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 . + + + +================================================ +FILE: script.js +================================================ +const canvas = document.getElementById('graphCanvas'); +const ctx = canvas.getContext('2d'); +const width = canvas.width; +const height = canvas.height; +const center = width / 2; // середина — точка (0,0) (150px) +const R_PIXELS = 100; // Длина R в пикселях на канвасе для отрисовки + +// Элементы формы +const form = document.getElementById('point-form'); +const yInput = document.getElementById('y-input'); +const yError = document.getElementById('y-error'); +const rHidden = document.getElementById('r-hidden'); +const rError = document.getElementById('r-error'); +const rButtons = document.querySelectorAll('.r-button'); +const checkboxes = document.querySelectorAll('input[name="xval"]'); +const submitBtn = document.getElementById('submit-btn'); +const globalError = document.getElementById('global-error'); +const resultsBody = document.getElementById('results-body'); +const clearHistoryBtn = document.getElementById('clear-history-btn'); + +// Б - безопасность +const STORAGE_KEY = 'web_lab1_history'; +let history = []; +let currentR = null; + +try { + const rawData = JSON.parse(localStorage.getItem(STORAGE_KEY)); + if (Array.isArray(rawData)) { + // Проверяем LocalStorage (вдруг врёт) + history = rawData.filter(rec => { + if (typeof rec !== 'object' || rec === null) return false; + if (![1, 2, 3, 4, 5].includes(rec.r)) return false; + if (![-2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2].includes(rec.x)) return false; + if (typeof rec.y !== 'number' || isNaN(rec.y) || ((rec.y < -3 || rec.y > 5) && rec.y !== 81)) return false; + return true; + }); + } +} catch (e) { + history = []; // Миша, всё херня, начинай сначала. +} + +// Пошло поехало +window.addEventListener('DOMContentLoaded', () => { + // Очистка истории + if (clearHistoryBtn) { + clearHistoryBtn.addEventListener('click', () => { + history = []; + localStorage.removeItem(STORAGE_KEY); + renderHistory(); + drawGraph(); + }); + } + renderHistory(); + drawGraph(); + validateForm(); +}); + +rButtons.forEach(btn => { + btn.addEventListener('click', () => { + rButtons.forEach(b => b.classList.remove('active')); + btn.classList.add('active'); + rHidden.value = btn.getAttribute('data-val'); + currentR = parseFloat(rHidden.value); + rError.textContent = ''; + validateForm(); + drawGraph(); + }); +}); + +checkboxes.forEach(cb => { + cb.addEventListener('change', validateForm); +}); + +yInput.addEventListener('input', () => { + validateY(); + validateForm(); +}); + +function checkHit(x, y, r) { + // Первая четверть (X >= 0, Y >= 0): Четверть круга (R) + if (x >= 0 && y >= 0) { + return (x * x + y * y) <= (r * r); + } + // Вторая четверть (X <= 0, Y >= 0): Прямоугольник (ширина R, высота R/2) + if (x <= 0 && y >= 0) { + return x >= -r && y <= (r / 2); + } + // Третья четверть (X <= 0, Y <= 0): Пустота + if (x <= 0 && y <= 0) { + return false; + } + // Четвертая четверть (X >= 0, Y <= 0): Треугольник (проходит через (R, 0) и (0, -R/2)) + // Уравнение прямой: y = x/2 - r/2 => точка внутри если y >= x/2 - r/2 + if (x >= 0 && y <= 0) { + return y >= (x / 2) - (r / 2); + } + return false; +} + +function validateY() { + const valStr = yInput.value.trim().replace(',', '.'); + if (valStr === '') { + yError.textContent = 'Поле Y обязательно к заполнению.'; + return false; + } + + const y = Number(valStr); + if (isNaN(y)) { + yError.textContent = 'Y должно быть числом (буквы недопустимы).'; + return false; + } + + if ((y < -3 || y > 5) && y !== 81) { + yError.textContent = 'Значение Y должно принадлежать диапазону от -3 до 5 включительно.'; + return false; + } + + yError.textContent = ''; + return true; +} + +function validateForm() { + let isValid = true; + + if (!validateY()) isValid = false; + + const validRValues = [1, 2, 3, 4, 5]; + if (!rHidden.value) { + rError.textContent = 'Необходимо выбрать значение R.'; + isValid = false; + } else if (!validRValues.includes(parseFloat(rHidden.value))) { + rError.textContent = 'Обнаружена подмена значения R!'; + isValid = false; + } else { + rError.textContent = ''; + } + + const validXValues = [-2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2]; + let xChecked = false; + let xSpoofed = false; + + checkboxes.forEach(cb => { + if (cb.checked) { + xChecked = true; + if (!validXValues.includes(parseFloat(cb.value))) { + xSpoofed = true; + } + } + }); + + if (!xChecked) { + globalError.textContent = 'Выберите хотя бы одно значение X.'; + isValid = false; + } else if (xSpoofed) { + globalError.textContent = 'Ошибка: передано недопустимое значение X!'; + isValid = false; + } else { + globalError.textContent = ''; + } + + submitBtn.disabled = !isValid; + return isValid; +} + +form.addEventListener('submit', (e) => { + e.preventDefault(); + + if (!validateForm()) return; + + const y = parseFloat(yInput.value.trim().replace(',', '.')); + // пасхалка + if (y === 81) { + const egg = document.getElementById('oscar-easter-egg'); + if (egg) { + egg.classList.add('show'); + setTimeout(() => egg.classList.remove('show'), 1000); + } + yInput.value = ''; + validateForm(); + return; + } + + const r = parseFloat(rHidden.value); + + // Дата, время и тд + const dateString = new Date().toLocaleString("ru-RU", { + timeZone: Intl.DateTimeFormat().resolvedOptions().timeZone, + year: 'numeric', + month: 'long', + day: 'numeric', + hour: '2-digit', + minute: '2-digit', + second: '2-digit' + }); + + checkboxes.forEach(cb => { + if (cb.checked) { + const x = parseFloat(cb.value); + const hit = checkHit(x, y, r); + + history.push({ + x: x, + y: y, + r: r, + hit: hit, + time: dateString + }); + } + }); + + localStorage.setItem(STORAGE_KEY, JSON.stringify(history)); + + renderHistory(); + drawGraph(); +}); + +function renderHistory() { + resultsBody.innerHTML = ''; + [...history].reverse().forEach(rec => { + const tr = document.createElement('tr'); + tr.innerHTML = ` + ${rec.x} + ${rec.y} + ${rec.r} + + ${rec.hit ? 'Попадание' : 'Промах'} + + ${rec.time} + `; + resultsBody.appendChild(tr); + }); +} + +function drawGraph() { + ctx.clearRect(0, 0, width, height); + ctx.fillStyle = '#3399FF'; + + // Прямоугольник + ctx.fillRect(center - R_PIXELS, center - R_PIXELS / 2, R_PIXELS, R_PIXELS / 2); + + // Четверть круга + ctx.beginPath(); + ctx.moveTo(center, center); + ctx.arc(center, center, R_PIXELS, -Math.PI / 2, 0, false); + ctx.closePath(); + ctx.fill(); + + // Треугольник + ctx.beginPath(); + ctx.moveTo(center, center); + ctx.lineTo(center + R_PIXELS, center); + ctx.lineTo(center, center + R_PIXELS / 2); + ctx.closePath(); + ctx.fill(); + + // Оси + ctx.strokeStyle = '#000'; + ctx.lineWidth = 1; + ctx.beginPath(); + + // Ось X + ctx.moveTo(0, center); + ctx.lineTo(width, center); + ctx.lineTo(width - 5, center - 5); + ctx.moveTo(width, center); + ctx.lineTo(width - 5, center + 5); + + // Ось Y + ctx.moveTo(center, height); + ctx.lineTo(center, 0); + ctx.lineTo(center - 5, 5); + ctx.moveTo(center, 0); + ctx.lineTo(center + 5, 5); + + ctx.stroke(); + + // Обозначения + ctx.fillStyle = '#000'; + ctx.font = '12px Arial'; + + // Ось X + ctx.fillText('R', center + R_PIXELS - 5, center + 15); + ctx.fillText('R/2', center + R_PIXELS / 2 - 10, center + 15); + ctx.fillText('-R', center - R_PIXELS - 5, center + 15); + ctx.fillText('-R/2', center - R_PIXELS / 2 - 10, center + 15); + ctx.fillText('x', width - 10, center - 10); + + // Ось Y + ctx.fillText('R', center + 10, center - R_PIXELS + 4); + ctx.fillText('R/2', center + 10, center - R_PIXELS / 2 + 4); + ctx.fillText('-R', center + 10, center + R_PIXELS + 4); + ctx.fillText('-R/2', center + 10, center + R_PIXELS / 2 + 4); + ctx.fillText('y', center + 10, 10); + + // Засечки + ctx.beginPath(); + [R_PIXELS, R_PIXELS/2, -R_PIXELS, -R_PIXELS/2].forEach(p => { + // по X + ctx.moveTo(center + p, center - 3); + ctx.lineTo(center + p, center + 3); + // по Y + ctx.moveTo(center - 3, center + p); + ctx.lineTo(center + 3, center + p); + }); + ctx.stroke(); + + if (currentR && currentR > 0) { + history.forEach(rec => { + let drawX = center + (rec.x / currentR) * R_PIXELS; + let drawY = center - (rec.y / currentR) * R_PIXELS; + + ctx.beginPath(); + ctx.arc(drawX, drawY, 4, 0, 2 * Math.PI, false); + ctx.fillStyle = rec.hit ? '#4CAF50' : '#F44336'; + ctx.fill(); + ctx.strokeStyle = '#222'; + ctx.stroke(); + }); + } +} + + + +================================================ +FILE: tasks.md +================================================ +1. поле ввода функции (кастомизация области попадания) модуль, тригонометрия, степень +2. изменение отрисовки и точек попадания относительно r +3. div убрать, дотабличить вёрстку +4. На пустые значение не ругаться +5. отчёт + + + +================================================ +FILE: docs/requirements.md +================================================ +Частые ошибки: + +1. Использование alert для вывода сообщений об ошибках. +2. Отсутствие человекочитаемых сообщений об ошибках при вводе некорректных значений. Например, вывод стандартного сообщения об ошибке от JSF валидатора не является человекочитаемым сообщением об ошибке. +3. Отсутствие валидации значений на серверной стороне. +4. Некорректная обработка числовых значений с большой точностью. Ограничение числа знаков после запятой - не решение! +5. Отсутствие корректной обработки чисел с разделителем запятая. +6. Отсутствие/несоответсвие необходимых пунктов из задания к лабораторной. +7. "Использование микроскопа для забивания гвоздей" т.е. использование каких-либо технологий без особой необходимости, переусложнение исходного кода. +8. Ипользование библиотек компонентов в несоотвествии с вариантом. Если в варианте у вас написано использовать компоненты React Toolbox/Prime React/что-то_другое, то вы обязаны использовать их, а не то, что Вам больше понравилось. +9. Несоответствие компонентов ввода X, Y, R тому, что написано в варианте. +10. Отстуствие отправки точки и добавления ее в таблицу при нажатии на график (начиная со второй лабораторной работы). +11. Ограничение возможных координат точки при клике по графику (например, если x: Button [-2, -1,5, -1, -0,5, 0], то с графика можно отправить точку с координатой x=-0.345). +12. Отсутствие корректной обработки отрицательного радиуса. Т.е. если в варианте есть отрицательный радиус, необходимо это обрабатывать как корректный случай — например, перерисовывать фигуру симметрично относительно начала координат. +13. Отсутствие перерисовки графика при изменении выбранного радиуса. +14. Изменение логики работы компонентов ввода. Например, если компонент подразумевает возможность множественного выбора, то при выборе нескольких элементов необходимо отправлять на сервер несколько точек; Если такой компонент задан в качестве радиуса, то при множетсвенном выборе радиусов необходимо отображать несоклько графиков. +15. Некорректная работа с пользователями: +15.1. При попытке зайти с разных браузеров в одного и того же пользователя есть два варианта: либо автоматическое обновление точек во втором окне при добавлении их с первого без необходимости обновлять старницу, либо запрет заходить с разных мест одному пользователю, т.е. при попытке логина уже залогиненного пользователя с другого окна/браузера разлогинивать его в первом. +15.2. При возможности залогиниться в разных пользователей с разных вкладок одного окна браузера недопустим кейс, когда при обновлении страницы пользователь внезапно меняется с одного на другого. +15.3. При невозможности залогиниться в разных пользователей с разных вкладок одного окна браузера необходимо учесть следующее: +15.3.1. Если во вкладке_1 пользователь залогинен, то при открытии вкладки_2 мы попадаем в аккаунт того же пользователя без необходимости выполнять авторизацию дополнительно. +15.3.2. Если в вкладке_1 пользователь вышел из аккаунта, то во вкладке_2 необходимо либо разлогинить сразу, либо при совершении какого-то действия выводить сообщение о том, что был совершен выход из аккаунта/вы не авторизованы/что-то_в_этом_духе и производить редирект на страницу логина. + + + +================================================ +FILE: docs/task.md +================================================ +# Задача + +![картинка задания](task.png) + + +Разработать HTML-страницу с JS и CSS, определяющую попадание точки на координатной плоскости в заданную область. Область задается по варианту и приведена выше на рисунке. Требуется нарисовать ее средствами Canvas. + +Кроме координатной плоскости, на странице должна быть HTML форма с полями X, Y, R. На рисунке по вашему варианту кроме самой координатной области определены типы полей формы и область допустимых значений для каждого поля. Страница должна содержать сценарий на языке JavaScript, осуществляющий валидацию значений, вводимых пользователем в поля формы. Любые некорректные значения (например, буквы в координатах точки или отрицательный радиус) должны блокироваться. + +Точки должны определяться на основе данных формы, факт попадания точки должен вычисляться при помощи JS в момент отправки формы. Результаты проверок должны отображаться в таблице на странице, а также сохраняться при перезагрузке страницы. Для реализации сохранения точек между перезагрузками требуется использовать LocalStorage. + +Помимо данных из формы в таблице результатов должно отображаться дата и время, когда была выполнена проверка. Дата и время должны отображться с учетом часового пояса клиентского устройства, т.е. при смене часового пояса на устройстве отображаемые даты и время должны корректным образом пересчитаться, чтобы отображать тот же самый момент времени. Требуется отображать дату и время строго в русской локализации. + +### Разработанная HTML-страница должна удовлетворять следующим требованиям: + +1. Для расположения текстовых и графических элементов необходимо использовать табличную верстку. +2. Таблицы стилей должны располагаться в самом веб-документе. +3. При работе с CSS должно быть продемонстрировано использование селекторов дочерних элементов, селекторов классов, селекторов идентификаторов, селекторов элементов, а также такие свойства стилей CSS, как наследование и каскадирование. +4. HTML-страница должна иметь «шапку», содержащую ФИО студента, номер группы и номер варианта. При оформлении шапки необходимо явным образом задать шрифт (monospace), его цвет и размер в каскадной таблице стилей. +5. Отступы элементов ввода должны задаваться в пикселях. + + diff --git a/docs/report.pages b/docs/report.pages new file mode 100644 index 0000000..0508736 Binary files /dev/null and b/docs/report.pages differ diff --git a/docs/report.pdf b/docs/report.pdf new file mode 100644 index 0000000..5ab6b42 Binary files /dev/null and b/docs/report.pdf differ diff --git a/docs/req_report.md b/docs/req_report.md new file mode 100644 index 0000000..70df0a0 --- /dev/null +++ b/docs/req_report.md @@ -0,0 +1,18 @@ +## Каждый отчет должен содержать: + - Титульный лист, включающий в себя следующие пункты: + * Учебное заведение + * Факультет + * Дисциплина + * Номер лабораторной работы + * Номер варианта + * Кем выполнена работа + * Кому сдаётся работа + * Город + * Год + - З.Ы. указывайте актуальное наименование учебного заведения. + - Содержание + - Цель + - Задание к лабораторной работе + - Исходный код или ссылка на него + - Вывод + - З.Ы. Если вы вставляете исходный код целиком, подтрудитесь сделать его читаемым. Отчеты с исходным кодом не на светлом фоне и/или выполненнымм немоноширинным шрифтом приняты не будут. diff --git a/index.html b/index.html index e2f3ecb..b807746 100644 --- a/index.html +++ b/index.html @@ -44,13 +44,17 @@ width: 50%; } - #point-form > .form-group { - margin-bottom: 20px; + #point-form table { + width: 100%; + border-collapse: collapse; + } + + #point-form td { padding: 10px; border: 1px dashed #aaaaaa; } - .checkbox-group label { + #point-form label { margin-right: 15px; } @@ -98,9 +102,8 @@ margin-bottom: 10px; } - .table-scroll-container { - max-height: 250px; - overflow-y: scroll; + #results-table { + width: 100%; } #results-table th { @@ -113,10 +116,36 @@ text-align: center; } - .canvas-container { + #results-table tbody { + display: block; + max-height: 250px; + overflow-y: scroll; + } + + #results-table thead, #results-table tbody tr { + display: table; + width: 100%; + table-layout: fixed; + } + + .content-cell[colspan="2"] > h3, + .content-cell[colspan="2"] > button { + display: block; + } + + td.canvas-cell { text-align: center; } + td.canvas-cell > * { + display: block; + margin: 0 auto; + } + + td.canvas-cell > p { + font-size: 12px; + } + #oscar-easter-egg { position: fixed; bottom: -350px; @@ -141,50 +170,84 @@ - +

Область графика

-

(Точки отображаются относительно выбранного R)

+

(Точки отображаются относительно выбранного R)

Форма проверки

- -
- -
-
-
- - - - -
- - - - -
-
- -
- - - -
- -
-
- - - - - - - -
- - + + + + + + + + + + + + + + + + + + + +
+ +
+
+ + + + +
+ + + + +
+ + + +
+ + + + + + + + + + + + + + +
+ Доступные функции: abs(x), sin(x), cos(x), tan(x), sqrt(x), x^2 (степень) +
+ Переменные: x, y, R +
+ Примеры: x^2 + y^2 < R^2 | sin(x) + abs(y) < R | abs(x) + abs(y) < R +
+
+
+ + + + + + + +
+ +
@@ -192,30 +255,25 @@

История проверок

- -
- - - - - - - - - - - - - -
XYRРезультатДата и время
-
+ + + + + + + + + + + + + +
XYRРезультатДата и время
Toasty - - diff --git a/script.js b/script.js index 52f06cf..592f789 100644 --- a/script.js +++ b/script.js @@ -2,13 +2,15 @@ const canvas = document.getElementById('graphCanvas'); const ctx = canvas.getContext('2d'); const width = canvas.width; const height = canvas.height; -const center = width / 2; // середина — точка (0,0) (150px) -const R_PIXELS = 100; // Длина R в пикселях на канвасе для отрисовки +const center = width / 2; // Элементы формы const form = document.getElementById('point-form'); const yInput = document.getElementById('y-input'); const yError = document.getElementById('y-error'); +const funcInput = document.getElementById('func-input'); +const funcError = document.getElementById('func-error'); +const previewFuncBtn = document.getElementById('preview-func-btn'); const rHidden = document.getElementById('r-hidden'); const rError = document.getElementById('r-error'); const rButtons = document.querySelectorAll('.r-button'); @@ -22,6 +24,8 @@ const clearHistoryBtn = document.getElementById('clear-history-btn'); const STORAGE_KEY = 'web_lab1_history'; let history = []; let currentR = null; +let formSubmitted = false; +let customFunction = null; try { const rawData = JSON.parse(localStorage.getItem(STORAGE_KEY)); @@ -61,22 +65,71 @@ rButtons.forEach(btn => { btn.classList.add('active'); rHidden.value = btn.getAttribute('data-val'); currentR = parseFloat(rHidden.value); - rError.textContent = ''; + if (formSubmitted) { + rError.textContent = ''; + } validateForm(); drawGraph(); }); }); checkboxes.forEach(cb => { - cb.addEventListener('change', validateForm); + cb.addEventListener('change', () => { + if (formSubmitted) { + globalError.textContent = ''; + } + validateForm(); + }); }); yInput.addEventListener('input', () => { - validateY(); + if (formSubmitted) { + yError.textContent = ''; + } validateForm(); }); +funcInput.addEventListener('input', () => { + if (formSubmitted) { + funcError.textContent = ''; + } + validateForm(); +}); + +previewFuncBtn.addEventListener('click', () => { + const funcStr = funcInput.value.trim(); + + if (funcStr === '') { + customFunction = null; + funcError.textContent = ''; + drawGraph(); + return; + } + + if (!currentR) { + funcError.textContent = 'Сначала выберите значение R'; + return; + } + + try { + customFunction = parseFunction(funcStr); + funcError.textContent = ''; + drawGraph(); + } catch (e) { + funcError.textContent = e.message; + customFunction = null; + } +}); + function checkHit(x, y, r) { + if (customFunction) { + try { + return customFunction(x, y, r); + } catch (e) { + return false; + } + } + // Первая четверть (X >= 0, Y >= 0): Четверть круга (R) if (x >= 0 && y >= 0) { return (x * x + y * y) <= (r * r); @@ -97,42 +150,95 @@ function checkHit(x, y, r) { return false; } -function validateY() { +function parseFunction(funcStr) { + if (!funcStr || funcStr.trim() === '') { + return null; + } + + const normalized = funcStr.trim() + .replace(/abs\(/g, 'Math.abs(') + .replace(/sin\(/g, 'Math.sin(') + .replace(/cos\(/g, 'Math.cos(') + .replace(/tan\(/g, 'Math.tan(') + .replace(/sqrt\(/g, 'Math.sqrt(') + .replace(/\^/g, '**'); + + const allowedChars = /^[xyrRMathabsincoqrt.()+\-*/<>=\s\d.]+$/; + if (!allowedChars.test(normalized)) { + throw new Error('Недопустимые символы в функции'); + } + + try { + const func = new Function('x', 'y', 'r', 'R', `return ${normalized};`); + func(0, 0, 1, 1); + return (x, y, r) => func(x, y, r, r); + } catch (e) { + throw new Error('Синтаксическая ошибка в функции'); + } +} + +function validateFunction(showErrors = false) { + const funcStr = funcInput.value.trim(); + if (funcStr === '') { + return true; + } + + try { + parseFunction(funcStr); + return true; + } catch (e) { + if (showErrors) { + funcError.textContent = e.message; + } + return false; + } +} + +function validateY(showErrors = false) { const valStr = yInput.value.trim().replace(',', '.'); if (valStr === '') { - yError.textContent = 'Поле Y обязательно к заполнению.'; + if (showErrors) { + yError.textContent = 'Поле Y обязательно к заполнению.'; + } return false; } const y = Number(valStr); if (isNaN(y)) { - yError.textContent = 'Y должно быть числом (буквы недопустимы).'; + if (showErrors) { + yError.textContent = 'Y должно быть числом (буквы недопустимы).'; + } return false; } if ((y < -3 || y > 5) && y !== 81) { - yError.textContent = 'Значение Y должно принадлежать диапазону от -3 до 5 включительно.'; + if (showErrors) { + yError.textContent = 'Значение Y должно принадлежать диапазону от -3 до 5 включительно.'; + } return false; } - yError.textContent = ''; return true; } -function validateForm() { +function validateForm(showErrors = false) { let isValid = true; - if (!validateY()) isValid = false; + if (!validateY(showErrors)) isValid = false; + + if (!validateFunction(showErrors)) isValid = false; const validRValues = [1, 2, 3, 4, 5]; if (!rHidden.value) { - rError.textContent = 'Необходимо выбрать значение R.'; + if (showErrors) { + rError.textContent = 'Необходимо выбрать значение R.'; + } isValid = false; } else if (!validRValues.includes(parseFloat(rHidden.value))) { - rError.textContent = 'Обнаружена подмена значения R!'; + if (showErrors) { + rError.textContent = 'Обнаружена подмена значения R!'; + } isValid = false; - } else { - rError.textContent = ''; } const validXValues = [-2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2]; @@ -149,13 +255,15 @@ function validateForm() { }); if (!xChecked) { - globalError.textContent = 'Выберите хотя бы одно значение X.'; + if (showErrors) { + globalError.textContent = 'Выберите хотя бы одно значение X.'; + } isValid = false; } else if (xSpoofed) { - globalError.textContent = 'Ошибка: передано недопустимое значение X!'; + if (showErrors) { + globalError.textContent = 'Ошибка: передано недопустимое значение X!'; + } isValid = false; - } else { - globalError.textContent = ''; } submitBtn.disabled = !isValid; @@ -165,7 +273,9 @@ function validateForm() { form.addEventListener('submit', (e) => { e.preventDefault(); - if (!validateForm()) return; + formSubmitted = true; + + if (!validateForm(true)) return; const y = parseFloat(yInput.value.trim().replace(',', '.')); // пасхалка @@ -181,6 +291,14 @@ form.addEventListener('submit', (e) => { } const r = parseFloat(rHidden.value); + + const funcStr = funcInput.value.trim(); + try { + customFunction = parseFunction(funcStr); + } catch (e) { + funcError.textContent = e.message; + return; + } // Дата, время и тд const dateString = new Date().toLocaleString("ru-RU", { @@ -233,25 +351,57 @@ function renderHistory() { function drawGraph() { ctx.clearRect(0, 0, width, height); - ctx.fillStyle = '#3399FF'; + + const R_PIXELS = currentR ? (100 * currentR / 3) : 100; + + if (customFunction && currentR) { + const imageData = ctx.createImageData(width, height); + const data = imageData.data; + + for (let py = 0; py < height; py++) { + for (let px = 0; px < width; px++) { + const x = ((px - center) / R_PIXELS) * currentR; + const y = ((center - py) / R_PIXELS) * currentR; + + const hit = checkHit(x, y, currentR); + + const index = (py * width + px) * 4; + if (hit) { + data[index] = 51; + data[index + 1] = 153; + data[index + 2] = 255; + data[index + 3] = 255; + } else { + data[index] = 255; + data[index + 1] = 255; + data[index + 2] = 255; + data[index + 3] = 255; + } + } + } + + ctx.putImageData(imageData, 0, 0); + } else { + ctx.fillStyle = '#3399FF'; - // Прямоугольник - ctx.fillRect(center - R_PIXELS, center - R_PIXELS / 2, R_PIXELS, R_PIXELS / 2); + // Прямоугольник + ctx.fillRect(center - R_PIXELS, center - R_PIXELS / 2, R_PIXELS, R_PIXELS / 2); - // Четверть круга - ctx.beginPath(); - ctx.moveTo(center, center); - ctx.arc(center, center, R_PIXELS, -Math.PI / 2, 0, false); - ctx.closePath(); - ctx.fill(); + // Четверть круга + ctx.beginPath(); + ctx.moveTo(center, center); + ctx.arc(center, center, R_PIXELS, -Math.PI / 2, 0, false); + ctx.closePath(); + ctx.fill(); - // Треугольник - ctx.beginPath(); - ctx.moveTo(center, center); - ctx.lineTo(center + R_PIXELS, center); - ctx.lineTo(center, center + R_PIXELS / 2); - ctx.closePath(); - ctx.fill(); + // Треугольник + ctx.beginPath(); + ctx.moveTo(center, center); + ctx.lineTo(center + R_PIXELS, center); + ctx.lineTo(center, center + R_PIXELS / 2); + ctx.closePath(); + ctx.fill(); + } // Оси ctx.strokeStyle = '#000'; @@ -306,8 +456,8 @@ function drawGraph() { if (currentR && currentR > 0) { history.forEach(rec => { - let drawX = center + (rec.x / currentR) * R_PIXELS; - let drawY = center - (rec.y / currentR) * R_PIXELS; + let drawX = center + (rec.x / rec.r) * R_PIXELS; + let drawY = center - (rec.y / rec.r) * R_PIXELS; ctx.beginPath(); ctx.arc(drawX, drawY, 4, 0, 2 * Math.PI, false);