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Summary of canvas problems in HTML5

Summary of canvas problems in HTML5

Problems encountered when learning HTML5 canvas 1. Non-zero wrapping principle (nonzZero rule) The non-zero wrapping principle is the basis for judging whether the canvas should be filled when filling. Pull a line out of the area where the fill is determined and outside the graphic. This drawn line is the auxiliary line. Determine whether the drawn line crosses from the left side of the auxiliary line to the right side of the auxiliary line. At this time, this crossing method is recorded as +1; if it crosses from the right side of the auxiliary line to the left side of the auxiliary line, it is recorded as - 1. Finally, all recorded numbers are

Jul 18, 2017 am 10:42 AM
canvas HTML5 h5
Detailed explanation of endpoints and connection points of line segments in canvas

Detailed explanation of endpoints and connection points of line segments in canvas

We described the drawing of line segments in Section 3, where the line segment attribute lineWidth is used to change the width of the line segment. Let us recall the usage of line width function drawLine(){ cxt.lineWidth = 3; cxt.moveTo(10, 10); cxt.lineTo(120, 100); cxt.stroke();} We will use the above code You can draw a line segment with a width of 3 pixels. Previous chapter

Jul 18, 2017 am 09:35 AM
canvas 端点 线段
Detailed explanation on the use of volume attribute in html5

Detailed explanation on the use of volume attribute in html5

Audio object properties: volume Description: Set or return the audio volume, value range (0-1) The following is the code I made for how to adjust the audio volume of the music player:

Jul 17, 2017 pm 02:15 PM
volume html5 h5
Detailed introduction to h5 elements/attributes/formatting

Detailed introduction to h5 elements/attributes/formatting

HTML Basics 1. HTML Elements 1.1 Elements refer to all codes from the start tag to the end tag. 1.2 The content of the element is the content between the start tag and the end tag. 1.3 Most HTML elements can have attributes. 1.4 Tags can have attributes to provide more information to the element. 1.5 Commonly used tag attributes: <h1>: align alignment <body>: bgcolor background color <a>: target specifies where to open the tag test original code:

Jul 17, 2017 am 11:07 AM
HTML5 h5 属性
Detailed introduction to file upload in H5

Detailed introduction to file upload in H5

Preface The file API provided in HTML5 has rich applications in the front end. Uploading, downloading, reading content, etc. are common in daily interactions. And the compatibility with various browsers is relatively good, including mobile terminals, except that IE only supports versions above IE10. If you want to better master the functions of operating files, you must first be familiar with each API. Original author: Lin Xin, author's blog: https://github.com/lin-xin/blogFileList object and file object inpu in HTML

Jul 17, 2017 am 11:06 AM
HTML5 上传下载 h5
Detailed introduction to html5 server push

Detailed introduction to html5 server push

This article mainly introduces HTML5 server push. The editor thinks it is quite good. Now I will share it with you and give you a reference. Let’s follow the editor and take a look.

Jul 16, 2017 pm 04:23 PM
html5 服务器 h5
Graphic and text examples of new HTML5 form elements

Graphic and text examples of new HTML5 form elements

This article mainly introduces the new HTML5 form elements in detail and introduces three form elements. It has certain reference value. Interested friends can refer to it.

Jul 16, 2017 pm 03:44 PM
HTML5 h5 表单
Introduction to relevant examples of html5 audio

Introduction to relevant examples of html5 audio

html5 <audio> is a new tag in HTML 5 that defines sounds, such as music or other audio streams. Let me share with you the basic knowledge of html audio through this article. Friends who are interested can learn together.

Jul 16, 2017 pm 03:43 PM
html5 h5 介绍
Detailed introduction to Html5 canvas

Detailed introduction to Html5 canvas

This article mainly introduces the Html5 canvas. The canvas element is used to draw graphics on web pages. Friends who are interested can come and find out together.

Jul 16, 2017 pm 03:42 PM
Html5 h5 介绍
Detailed explanation of the head of html5

Detailed explanation of the head of html5

This article mainly introduces the understanding of head in HTML5. The editor thinks it is quite good. Now I share it with you and give it as a reference. Let’s follow the editor and take a look.

Jul 16, 2017 pm 03:39 PM
html5 head h5
Detailed explanation of HTML5 drag and drop function examples

Detailed explanation of HTML5 drag and drop function examples

This article mainly introduces the relevant information of HTML5 drag and drop function in detail. How to achieve HTML5 drag and drop effect. It has certain reference value. Interested friends can refer to it.

Jul 16, 2017 pm 03:37 PM
HTML5 h5 拖放
HTML5 video playback tutorial example

HTML5 video playback tutorial example

The PC side mainly uses flash playback, while the mobile side uses HTML5. This article mainly introduces the relevant information of HTML5 video playback, which has certain reference value. Interested friends can refer to it.

Jul 16, 2017 pm 03:35 PM
html5 h5 实例
[Fruit Ninja] Blood Sun Crazy Knife Code-_-#There is really only one knife

[Fruit Ninja] Blood Sun Crazy Knife Code-_-#There is really only one knife

This article is provided by PHP Chinese website. It introduces how to use AS3 to write the code for a knife in Fruit Ninja. Since flash has been eliminated, the code is for reference only.

Jul 15, 2017 pm 12:00 PM
水果忍者，一把刀代码
Front-end framework-pop-up window research

Front-end framework-pop-up window research

This is some experience of the universal framework at work

Jul 15, 2017 am 11:52 AM
前端框架 弹窗 h5

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