Recommended 10 articles about painting

html5 has been out for a long time, but I have only recently started to come into contact with it. HTML5 provides many built-in functions that can achieve many functions, such as drawing line segments, drawing rectangles, drawing circles, drawing arcs, etc. However, HTML5 does not provide the function of drawing dotted lines. If you want to draw curves on canvas, it will take a little effort. Here are two ways to implement the function of drawing dotted lines: Method one is to write a separate function, and just call this curve when you want to draw a curve. function drawDashLine(context, x, y, x2, y2, dashLength) {

1. Use html5 to realize painting Dotted line effect code


Introduction: HTML5 has been out for a long time, but I have only recently started to come into contact with it. It, HTML5 provides many built-in functions that can achieve many functions, such as drawing line segments, drawing rectangles, drawing circles, drawing arcs, etc. However, HTML5 does not provide the function of drawing dotted lines. If you want to draw curves on canvas, it will be a little expensive. That’s it. Here are two ways to implement the function of drawing a dotted line: Method one is to write a separate function, and just call this curve when you want to draw a curve. ##2. Use HTML5 canvas to achieve a cool clock effect

 Introduction: For For H5, canvas can be said to be its most distinctive feature. With it, we can freely draw various graphics on the web page, make some small games, etc. How to use the canvas tag? There are a lot of tutorials on the Internet, so I won’t introduce them here. Today we will use canvas to make a small clock. First, I used two canvases on this page, one 
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#3. C# GDI+ Programming (1) 

 Introduction: Window refresh When a Paint event is generated, we add a handler function to this event. Then draw a picture in this function to ensure that the drawn picture is not refreshed. The delegate corresponding to the public Paint event is always displayed. delegate void PaintEventHandler(object sender, PaintEventArgs e); Let’s do the simplest drawing first, draw a line on the window (create a WindowsForms application) 
##4. 
 I have a problem with drawing connecting lines on the table and I need help. _html/css_WEB-ITnose
Introduction: I have a problem with drawing connecting lines on the table and I need help. 
5. 
How to draw this kind of pie chart on an html page_html/css_WEB-ITnose
Introduction : How to draw this kind of pie chart on an html page
6. 
 Is there any way to achieve the same effect as Windows drawing? Solution
Introduction: Is there any way to achieve the same effect as Windows Paint? If it is solved, I will add another 1000 points as a gift. In fact, I am making my own personal homepage. Recently, I have an idea to make a signature wall. Use a wall picture as the background and then the user can draw his or her name on the picture. After saving, other people can draw on the saved picture! Like a piece of paper. What method can be used to realize that the words are drawn instead of typed------Solution--------
7 . 
Is there any way to achieve the same effect as Windows Paint? Solution
Introduction: Is there any way to achieve the same effect as Windows Paint? If it is solved, I will add another 1,000 points as a gift. In fact, I am making my own personal homepage. Recently, I have an idea to make a signature wall. I just use A picture of the wall is used as the background, and the user can draw his or her name on the picture. After saving, other people can draw on the saved picture! Like a piece of paper. What method can be used to realize that the words are drawn instead of typed------Solution--------
8 . Ask about the function of Baidu Maps to retrieve restaurants based on "delivery range"
Introduction: I use Baidu Map API to draw a range on the map, the delivery range of the merchant (I saw that the backend of Meituan Takeout also draws a delivery range in this way); Then when the user orders food, based on the delivery address, the restaurants within the delivery range are retrieved, and which restaurants are currently available for delivery? What needs to be solved here...
9. Amap, Baidu cloud image retrieval how to solve the polygon retrieval problem? 
Introduction: Usage scenarios: 1: The restaurant draws a polygon on the map to represent the range of delivery (the restaurant is the PIO on the cloud map); 2: The user opens After application, positioning; 3: Automatically match restaurants that can deliver food at the current location (that is, the user's location is within the restaurant delivery area). I looked at the API and it seems that it is not implemented...
10 . Is the most difficult language in the world to understand C++, Java, Python or CSS/JS/HTML? 
 Introduction: I really can’t understand that the variable names in CSS/JS are not human readable. Functions also have no names. There is no declaration and no type. Can you read it? . Is it deliberately designed like this to prevent others from plagiarizing the code? Is it so difficult to draw a better-looking circle on a web page? 5555
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