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index.js
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index.js
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var canvas = document.getElementById("myCanvas");
var canvasRectangle = document.getElementById("canvasRectangle");
var sliderXL = document.getElementById("rangeXL");
var sliderXR = document.getElementById("rangeXR");
var sliderYL = document.getElementById("rangeYL");
var sliderYR = document.getElementById("rangeYR");
var sliderCycle = document.getElementById("rangecycle");
var btnSimulate = document.getElementById("btnSimulate");
var selectShape = document.getElementById("selectShapes");
var valueCycle = 5000;
var areaRectangle = 700 * 700;
let sizeXL = 0;
let sizeXR = 10;
let sizeYL = 0;
let sizeYR = 10;
var timing = null;
let verticesArr = [];
createMap();
createRectangleBorder();
selectShape.onchange = function () {
verticesArr = selectShape.options[selectShape.selectedIndex].dataset.vertices != undefined ? convertArray(JSON.parse(selectShape.options[selectShape.selectedIndex].dataset.vertices)) : [];
slider()
canvas.getContext("2d").clearRect(0, 0, 700, 700);
canvas.getContext("2d").beginPath();
switch (this.value) {
case 'circle':
createCircle();
break;
case '2':
createShape();
break;
}
}
btnSimulate.onclick = function () {
clearTimeout(timing);
if (!(selectShape.value == 0 && document.getElementsByClassName('dot-create').length == 0)) processSimulate();
else alert('You must choose a shape.')
};
sliderXL.oninput = function () {
slider()
};
sliderXR.oninput = function () {
slider()
};
sliderYL.oninput = function () {
slider()
};
sliderYR.oninput = function () {
slider()
};
sliderCycle.oninput = function () {
clearTimeout(timing);
valueCycle = this.value;
document.getElementById('rangecycle-label').innerHTML = valueCycle;
document.getElementById('info-total').innerHTML = valueCycle;
};
function slider() {
clearTimeout(timing);
sizeXL = Number(document.getElementById('rangeXL').value);
sizeXR = Number(document.getElementById('rangeXR').value);
sizeYL = Number(document.getElementById('rangeYL').value);
sizeYR = Number(document.getElementById('rangeYR').value);
createRectangleBorder(sizeXL, sizeXR, sizeYL, sizeYR);
}
function processSimulate() {
createRectangleBorder(sizeXL, sizeXR, sizeYL, sizeYR);
let areaExpected = 0;
if (selectShape.value == 'circle')
areaExpected = Math.PI * Math.pow(5, 2);
else
areaExpected = calculateArea();
document.getElementById('info-expected').innerHTML = areaExpected.toFixed(4);
document.getElementById('info-total').innerHTML = valueCycle;
let dentro = 0;
for (let i = 0; i < valueCycle; i++) {
setTimeout(function () {
let x = Math.random() * (sizeXR - sizeXL) + sizeXL,
y = Math.random() * (sizeYR - sizeYL) + sizeYL;
let point = { 'x': x, 'y': y };
createPoint(point);
if (selectShape.value == 'circle') {
if (Math.pow(x - 5, 2) + Math.pow(y - 5, 2) <= Math.pow(5, 2))
dentro++;
}
else {
if (pointInside(point))
dentro++;
}
areaRectangle = (sizeXR - sizeXL) * (sizeYR - sizeYL);
document.getElementById('info-result').innerHTML = (areaRectangle * (dentro / valueCycle)).toFixed(4);
document.getElementById('info-inside').innerHTML = dentro;
}, 0);
}
}
function calculateArea() {
let vertices = JSON.parse(JSON.stringify(verticesArr));
vertices.push(vertices[0]);
let count = vertices.length - 1;
let valueLeft = 0, valueRight = 0;
for (let i = 0; i < count; i++) {
valueLeft += vertices[i]['y'] * vertices[i + 1]['x'];
valueRight += vertices[i]['x'] * vertices[i + 1]['y'];
}
let result = Math.abs((valueLeft - valueRight) / 2);
return result;
}
function pointInside(point) {
point.x = point.x;
point.y = point.y;
let intersections = 0;
for (let i = 1; i < verticesArr.length; i++) {
let vertex1 = verticesArr[i - 1];
let vertex2 = verticesArr[i];
if (vertex1['y'] == vertex2['y'] && vertex1['y'] == point['y'] && point['x'] > Math.min(vertex1['x'], vertex2['x']) && point['x'] < Math.max(vertex1['x'], vertex2['x']))
return true; //boundary
if (point['y'] > Math.min(vertex1['y'], vertex2['y']) && point['y'] <= Math.max(vertex1['y'], vertex2['y']) && point['x'] <= Math.max(vertex1['x'], vertex2['x']) && vertex1['y'] != vertex2['y']) {
xinters = (point['y'] - vertex1['y']) * (vertex2['x'] - vertex1['x']) / (vertex2['y'] - vertex1['y']) + vertex1['x'];
if (xinters == point['x'])
return true; //boundary
if (vertex1['x'] == vertex2['x'] || point['x'] <= xinters)
intersections++;
}
}
if (intersections % 2 != 0) {
return true; //inside
} else {
return false; //outside
}
}
function createDot() {
let li = document.createElement('li');
let div = document.createElement('div');
div.classList.add('dot');
let img = document.createElement('img');
img.src = 'https://img.icons8.com/fluent-systems-regular/120/minus.png';
img.onclick = (e) => {
e.target.parentNode.remove();
createShapeButton();
}
let input1 = document.createElement('input')
input1.type = 'number';
input1.setAttribute('value', 0);
input1.min = '0';
input1.max = '10';
input1.classList.add('dot-create');
input1.onchange = () => {
createShapeButton();
}
let input2 = document.createElement('input')
input2.type = 'number';
input2.setAttribute('value', 0);
input2.min = '0';
input2.max = '10';
input2.classList.add('dot-create');
input2.onchange = () => {
createShapeButton();
}
div.appendChild(input1);
div.appendChild(input2);
li.appendChild(div);
li.appendChild(img);
document.getElementById('list-dots').appendChild(li);
}
function convertArray(array) {
let arrayConvert = []
for (let i = 0; i < array.length; i++) {
arrayConvert.push({ 'x': array[i][0], 'y': array[i][1] });
}
return arrayConvert;
}
// Add dot.
document.querySelector('#add-dot h3').addEventListener('click', () => {
createDot();
createShapeButton();
});
// Event close popup.
document.querySelector('#popup-modal h4').addEventListener('click', () => {
popup('none');
});
//Event open popup
document.querySelector('#btnCreate').addEventListener('click', () => {
popup("flex");
canvas.getContext("2d").clearRect(0, 0, 700, 700);
canvas.getContext("2d").beginPath();
document.getElementById('selectShapes').options.selectedIndex = 0
});
// Function event popup.
function popup(opcion) {
document.getElementById('popup').style.display = opcion;
}