SMIL for animation the SVG graphics

Egor PolyakovApril 26, 2020 Technologies:
SVGSMIL

Wiki for SVG graphics

Vector Scalable Graphics

Design of SVG graphics

Animation for SVG graphics

Legal use of SVG graphics

Description

SMIL (The Synchronized Multimedia Integration Language) is markup language for creating interactive multimedia presentations, such as animations, visual transformations, creating slide shows for presentations, demonstrating video, audio and e.t.c.

SMIL recommended of the World Wide Web Consortium. This language is based on XML, which in turn allows you to include links to other SMIL presentations, as well as buttons and more.

In addition to the animation elements defined in the SMIL specification, SVG includes extensions that are compatible with this SMIL specification.

Overview

SVG graphics is available for animation using specification SMIL.

Elements of SVG were originally defined in the SMIL specification:

In addition to the animation elements defined in the SMIL specification, SVG includes extensions that are compatible with the SMIL animation specification; these extensions include attributes that extend the functionality of the <animateMotion> element and additional animation elements.

SVG extensions

SVG extensions include:

allows you to set animation for one of the SVG transformation attributes over a certain period of time, for example, for the transform attribute.

✔ path (attribute) allows any function of the SVG path data syntax to be specified in the path attribute of the animateMotion element (SMIL animation allows you to use only a subordinate set of SVG path data syntax in the path attribute).

Animation of motion

AnimateMotion in the next section:

<mpath> used in conjunction with the animateMotion element to refer to the motion path that should be used, as well as the motion path.

The mpath element is included inside the animateMotion element, before the closing tag.

Keypoints (attribute) used as an attribute for animateMotion to provide precise control of the speed of moving an animated element along the path.

Rotate (attribute) used as an attribute for animateMotion to control whether an object rotates automatically so that its x-axis points rotate in the same (or reverse) direction as the direction of the tangent vector of the path.

This attribute is the key to creating traffic along the path that will work the way you need it. For more information, see animateMotion.

SVG animation can be similar to CSS animation and transitions due to its nature.

Use of SVG animation

For SVG, you can set styles and animations using CSS (slides). Basically, any transformation or transition animation that can be applied to an HTML element can also be applied to an SVG element.

However, there are some SVG properties that can't be animated via CSS, but this can be done directly via SVG.

An SVG trajectory, for example, is defined by a set of data (attribute d="") that defines the shape of this trajectory.

This data can be modified and animated via SMIL, but not via CSS.

This is because SVG elements are described using a set of attributes known as SVG view attributes.

Some of these attributes can be set, modified, and animated using CSS, while others can't.

Many animation effects at the moment simply cannot be implemented using CSS. This gap can be filled either with JavaScript or with declarative SVG animation obtained from SMIL.

Useful links

Read more about the SMIL animation on next web sites and pages of web service:

Bundle Space for You

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