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二维（2D）
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2D

2D refers to a plane with only two dimensions, length and width. 2D computer graphics work directly with pixels or vector shapes on a flat surface rather than building solid models, common in illustration, interface icons and animation.

Also known as

二维图形 · 二维

Definition

2D refers to a plane with only two dimensions, length and width. 2D computer graphics work directly with images on a flat surface rather than building solid models, making it the oldest and most widespread form of computer graphics.

How it works

2D imagery is represented by pixels (bitmaps) or mathematically described shapes (vectors), and drawing amounts to arranging shapes, text and colors on a plane by coordinates. A display’s picture is itself two-dimensional.

Usage

Illustration, interface icons, layout, 2D animation and web graphics all fall under 2D graphics. SVG and GIF are typical 2D image formats on the vector and bitmap paths respectively.

The difference between 2D and 3D is whether a solid model is involved: 3D models objects first and renders them into a flat image, while 2D draws directly on the plane.

Sources