SVG drawing function: svg realizes drawing a flower (with code)-H5 Tutorial-php.cn

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SVG drawing function: svg realizes drawing a flower (with code)

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Aug 08, 2018 am 11:10 AM

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The content of this article is about the SVG drawing function: svg realizes drawing a flower (with code), which has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. .

An important difference between the

1. Create a XXX.svg file (this file creates a red circle)

<?xml version="1.0" standalone="no"?>

<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" 
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg">

<circle cx="100" cy="50" r="40" stroke="black"
stroke-width="2" fill="red"/>

</svg>

SVG is written in XML and Save as .svg file. The .svg file must be referenced in the .html file

## 2. svg in HTML

1) Use the tag: is supported by all major browsers and allows the use of scripts

Comments: When embedded in an HTML page Using the tag when working with SVG is recommended by Adobe SVG Viewer! However, if you need to create valid XHTML, you cannot use . There is no tag in any HTML specification.

<embed src="rect.svg" width="300" height="100" 
type="image/svg+xml"
pluginspage="http://www.adobe.com/svg/viewer/install/" />

pluginspage: Point to the url to download the plug-in

2) Use the object tag: the standard tag of html4, which is supported by all newer browsers and does not allow the use of scripts

<object data="rect.svg" width="300" height="100" 
type="image/svg+xml"
codebase="http://www.adobe.com/svg/viewer/install/" />

codebase: Point to the url to download the plug-in

3)iframe tag: (recommended)

<iframe src="rect.svg" width="300" height="100">
</iframe>

3. SVG Shape

1. Rectangle

<rect width="300" height="100"
style="fill:rgb(0,0,255);stroke-width:1;
stroke:rgb(0,0,0)"/>

style attribute is used to define CSS properties

The stroke-width property defines the width of the rectangular border

The stroke property defines the color of the rectangular border

2, circle

3, ellipse< ;ellipse>

<ellipse cx="300" cy="150" rx="200" ry="80"
style="fill:rgb(200,100,50);
stroke:rgb(0,0,100);stroke-width:2"/>

The ellipse here has only one point (the mathematical ellipse usually has two foci)

cx attribute defines the x coordinate of the point

cy attribute Define the y coordinate of the point

rx attribute defines the horizontal radius (half of the line passing through the two foci)

ry attribute defines the vertical radius

4. Line5. Polygon

6. Polyline

7. Path

flower.svg

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
        "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg width="100%" height="100%" version="1.1"
     xmlns="http://www.w3.org/2000/svg">

    <circle cx="90" cy="90" r="30" fill="red" />

    <circle cx="150" cy="90" r="30" fill="yellow" />

    <circle cx="120" cy="60" r="30" fill="blue" />

    <circle cx="120" cy="120" r="30" fill="green" />
    <circle cx="120" cy="90" r="15" fill="pink"/>

    <line x1="120" y1="150" x2="120" y2="250"
    style="stroke:rgb(100,55,69);stroke-width:2"/>

    <ellipse cx="90" cy="190" rx="40" ry="10"
             style="fill:lime"/>
    <ellipse cx="150" cy="225" rx="40" ry="10"
             style="fill:lime"/>
</svg>

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<iframe src="flower.svg" width="100%" height="600" style="padding: 5px">
</iframe>
</body>
</html>

Rendering

Although it is a bit uglier, it is still a flower overall! Heehee

Generally speaking, svg is used to draw pictures, and you can also overlay various graphics to form your own pictures

Recommended related articles:

HTML tag: Summary of usage of img tag

Use of element in svg and introduction to marker attribute

How to implement svg Coordinate system transformation (with code)

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