Background: Participating in an interactive chart project, the customer had a need for polar coordinate comparison to display different types of indicator data in different directions and distances. Specifically, the attribute fields are: Source, distance, orientation, ID, rotation angle, size Let’s look at the renderings first: Technical points: Legend description: The distance is the radial […]
Tag: coordinate
OpenGL space coordinate transformation
First, you need to understand matrices. Matrices are often used for coordinate transformation in programs. Common matrices are: 1. Scaling matrix 2. Displacement matrix More one-dimensional coordinates: Homogeneous Coordinates use: 1. Allows us to displace on a 3D vector (we cannot displace the vector without the w component) 2. Divide the x, y and z […]
[WSN] Research on wireless sensor network X-Y coordinates to graphical view and bit string prefix embedding method (Matlab code implementation)
Welcome to this blog Advantages of bloggers:Blog content should be as thoughtful and logical as possible for the convenience of readers. Motto:He who travels a hundred miles is half as good as ninety. The directory of this article is as follows: Table of Contents 1 Overview 2 Operation results ? 3 References 4 Matlab code […]
How to convert latitude and longitude coordinates into three-dimensional coordinates in three.js or babylon.js
Requirements There are following requirements. According to the longitude and latitude coordinates returned by the interface, the data must be correctly rendered in the three-dimensional scene in three.js, or the movement trajectory of the object must be drawn based on the longitude and latitude coordinates. Analysis We all know that the rendering of three-dimensional three.js […]
Projection of the world coordinate system to the pixel coordinate system [python experiment]
For three-dimensional vision, it is necessary to clearly understand the correspondence between the world coordinate system and the pixel coordinate system. This article uses python for experiments. For the mathematical derivation of internal and external parameters of the camera, please see my previous blog “[AI Mathematics] Internal Parameters of Camera Imaging” “, “[AI Mathematics] Parameters […]
04-Echarts simplified series: Cartesian coordinate system xAxis and yAxis
For the X-axis and Y-axis in the graph, there are at most two x-axes in a grid. More than two axes need to be configured through the offset property. 1. xAxis and yAxis attribute configuration of coordinate system option={ xAxis:[ { id:’1′, //Component ID show:true, //Whether to display the x/y axis gridIndex:0, //The index of […]
Application of vue-aMap Gaode map (adding overlay point coordinates, custom icons, adding information form information, etc.)
Repost the original link Official document reference: aMap official document 1. Install amp npm install vue-amap –save 2. Introduce amap into main.js import AMap from ‘vue-amap’//Introduce Gaode map and initialize it Vue.use(AMap) AMap.initAMapApiLoader({<!– –><!– –> //It is best not to send the collection secret key directly, please pay special attention to it. key:’9dda7871b127d833afdc75274e12ae44’, //Plug-in collection […]
How to transform a three-dimensional vector based on the A coordinate system to the B coordinate system in ROS?
Abstract In ROS, the rotation quaternion rot from the A coordinate system to the B coordinate system is obtained through the tf.TransformListener.lookupTransform method, and the quaternion coordinate representation in the new coordinate system is obtained through the quaternion_multiply function. Based on this, this blog provides standard code templates and application examples for transforming a three-dimensional […]
Qwt QwtScaleDraw custom coordinate axis
1. Overview QwtScaleDraw is a class in the Qt drawing library Qwt, used to draw axis ticks and tick labels. It provides methods and properties to set the style, layout, and alignment of tick marks and labels. The following is the class inheritance relationship: 2. Commonly used methods Tag related methods: setLabelRotation(double angle): Set the […]
C# | Chaikin algorithm – Calculate the coordinate points of the smooth curve corresponding to the polyline
Chaikin algorithm – Calculate the coordinate points of the smooth curve corresponding to the polyline This article will introduce an algorithm for calculating the coordinate points of a smooth curve corresponding to a polyline. This algorithm uses the Chaikin curve smoothing method to adjust the smoothness and accuracy of the curve by controlling the tension […]