How to calculate polygon centroid in JavaScript
This article mainly introduces the method of calculating the centroid of polygons using JavaScript, and analyzes the relevant operating techniques of JavaScript for the mathematical calculation of the centroid of polygons in the form of examples. Friends in need can refer to it
The examples in this article describe JavaScript Implement a method for calculating the centroid of a polygon. Share it with everyone for your reference, the details are as follows:
Recently, I want to display the annotation of polygons based on Baidu Map, so I studied the calculation of the centroid of Polygon. The code is as follows:
function Area(p0,p1,p2)
{
var area = 0.0 ;
area = p0.lng * p1.lat + p1.lng * p2.lat + p2.lng * p0.lat - p1.lng * p0.lat - p2.lng * p1.lat - p0.lng * p2.lat;
return area / 2 ;
}
//line 249 计算polygon的质心
function getPolygonAreaCenter(points) {
var sum_x = 0;
var sum_y = 0;
var sum_area = 0;
var p1 = points[1];
debugger;
for (var i = 2; i < points.length; i++) {
p2=points[i];
area = Area(points[0],p1,p2) ;
sum_area += area ;
sum_x += (points[0].lng + p1.lng + p2.lng) * area;
sum_y += (points[0].lat + p1.lat + p2.lat) * area;
p1 = p2 ;
}
var xx = sum_x / sum_area / 3;
var yy = sum_y / sum_area / 3;
return new BMap.Point(xx, yy);
}The effect of annotating text As follows:
#The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
How to use enumeration types to implement HTML drop-down boxes in Vue
How to package static resources in Vue
js scope and pre-parsing mechanism (detailed tutorial)
The above is the detailed content of How to calculate polygon centroid in JavaScript. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
CUDA's universal matrix multiplication: from entry to proficiency!
Mar 25, 2024 pm 12:30 PM
General Matrix Multiplication (GEMM) is a vital part of many applications and algorithms, and is also one of the important indicators for evaluating computer hardware performance. In-depth research and optimization of the implementation of GEMM can help us better understand high-performance computing and the relationship between software and hardware systems. In computer science, effective optimization of GEMM can increase computing speed and save resources, which is crucial to improving the overall performance of a computer system. An in-depth understanding of the working principle and optimization method of GEMM will help us better utilize the potential of modern computing hardware and provide more efficient solutions for various complex computing tasks. By optimizing the performance of GEMM
How to calculate addition, subtraction, multiplication and division in word document
Mar 19, 2024 pm 08:13 PM
WORD is a powerful word processor. We can use word to edit various texts. In Excel tables, we have mastered the calculation methods of addition, subtraction and multipliers. So if we need to calculate the addition of numerical values in Word tables, How to subtract the multiplier? Can I only use a calculator to calculate it? The answer is of course no, WORD can also do it. Today I will teach you how to use formulas to calculate basic operations such as addition, subtraction, multiplication and division in tables in Word documents. Let's learn together. So, today let me demonstrate in detail how to calculate addition, subtraction, multiplication and division in a WORD document? Step 1: Open a WORD, click [Table] under [Insert] on the toolbar, and insert a table in the drop-down menu.
How to implement an online speech recognition system using WebSocket and JavaScript
Dec 17, 2023 pm 02:54 PM
How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.
WebSocket and JavaScript: key technologies for implementing real-time monitoring systems
Dec 17, 2023 pm 05:30 PM
WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology
How to use JavaScript and WebSocket to implement a real-time online ordering system
Dec 17, 2023 pm 12:09 PM
Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order
How to implement an online reservation system using WebSocket and JavaScript
Dec 17, 2023 am 09:39 AM
How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.
JavaScript and WebSocket: Building an efficient real-time weather forecasting system
Dec 17, 2023 pm 05:13 PM
JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We
Simple JavaScript Tutorial: How to Get HTTP Status Code
Jan 05, 2024 pm 06:08 PM
JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest
