Matplotlib_plotting canvas configuration

Canvas Configuration plt.figure() figsize:canvas size, width and height #Import the two libraries numpy and matplotlib.pyplot import numpy as np import matplotlib.pyplot as plt #Created a graphics window with a size of 5×3 inches. plt.figure(figsize=(5, 3)) # Draw sine curve x = np.linspace(0, 2*np.pi) y = np.sin(x) plt.plot(x, y) plt.show() If the canvas size is changed […]

Canvas draws simple raindrop collision effect

Canvas Example Application 100 + This column provides basic knowledge of canvas, advanced animation, related application extensions and other information. As a part of HTML, canvas is an important foundation for the visualization of images, icons and maps. Learning canvas will be very important in other applications. Article directory renderings source code canvas basic properties […]

Canvas implementation of progress bar display statistics example

Canvas Example Application 100 + This column provides basic knowledge of canvas, advanced animation, related application extensions and other information. As a part of HTML, canvas is an important foundation for the visualization of images, icons and maps. Learning canvas will be very important in other applications. Article directory renderings source code canvas basic properties […]

canvas uses front-end technology to generate image similarity hash (crop the image as long as the surrounding blank area is removed from the image content)

We made such a requirement in the front-end time. The designer designed the theme template through Photoshop software, and then we parsed the layer information in the psd file through the program, such as decorative pictures, text boxes, picture boxes, background pictures, etc. (this may be Some layer tags will be involved). For information on […]

Canvas simulates flame burning effect example

Canvas Example Application 100 + This column provides basic knowledge of canvas, advanced animation, related application extensions and other information. As a part of HTML, canvas is an important foundation for the visualization of images, icons and maps. Learning canvas will be very important in other applications. Article directory Example effect source code canvas basic […]

Canvas drawing constellations (zodiac signs)

Canvas draws the zodiac signs renderings Comparison chart Preparation Start coding The code of the author of free whoring Renderings Comparison picture Preparation (All the following snippets of code are typed by hand, and there will inevitably be grammatical errors. Please do not copy, the entire code will be published at the end of the […]

p5.js canvas operation practice: create, bind specified elements, dynamically adjust size, hide scroll bars, delete canvas

Article Introduction Previously, I briefly talked about how to use p5.js to create a canvas in “Introduction to p5.js Lightspeed”. This time I will introduce several canvas-related methods provided by p5.js. Related configuration when creating canvas. Lets the canvas bind the specified element. Resets the canvas size. Delete the canvas. Before studying this article, you […]

Canvas drawing in Compose

Canvas draws points /** *Canvas draw points */ @Composable fun DrawPointsTest() { val points = arrayListOf( Offset(100f, 100f), Offset(300f, 300f), Offset(500f, 500f), Offset(700f, 700f), Offset(900f, 900f) ) Canvas(modifier = Modifier.size(360.dp)) { drawPoints( points = points, //Type PointMode.Points: Points PointMode.Lines: Lines PointMode.Polygon: Polygons pointMode = PointMode.Points, //color color = Color.Blue, //color gradient // brush = Brush.linearGradient( […]

The solution to the cross-domain problem when the front-end accesses the geoserver service, and the use of html2canvas to download the drawn map

My business scenario: You need to use html2canvas to download the map drawn by Openlayers. Expectation: Can be downloaded as images or even other formats (svg) files. Result: The download is a blank image. Troubleshooting errors: The request data is echoed to the page normally. When intercepted using html2canvas, cross-domain will occur, resulting in the […]