5 Types of Computer Graphics

5 Types of Computer Graphics

Two-dimensional graphics (2D)

Two-dimensional computer graphics are computer-based digital images, mostly from two-dimensional models, such as two-dimensional collection models, text, and digital images, which are specifically distinguished by their technology.

Two-dimensional computer graphics were initially mainly used in traditional printing and painting technology applications, such as typesetting, maps, engineering graphics, advertising and other industries. In these applications, two-dimensional images are not only representations of real-world objects, but independent artifacts with semantic values added. So two-dimensional models are preferred because they can be controlled more directly than 3D computer graphics, and three-dimensional graphics are closer to photography.

Three-dimensional graphics (3D)

Compared with two-dimensional graphics, three-dimensional graphics refer to two-dimensional images drawn using three-dimensional geometric data and stored in a computer for the purpose of calculation and color rendering. These images will be displayed later or viewed in real time.

Despite the differences, 3D computer graphics still rely on a variety of two-dimensional graphics algorithms, such as the use of two-dimensional computer vector graphics in the graphic wireframe model, and the use of two-dimensional computer raster graphics in the final color display. In computer graphics software, the distinction between 2D and 3D is occasionally blurred. 2D applications may use 3D technology to achieve effects such as lighting, and the main 3D can also use 2D rendering technology.

3D computer graphics are often called three-dimensional models. In addition to the rendering graphics, the model is included in the graphics data file. However, there are differences. A three-dimensional model is an accurate representation of any three-dimensional object, but a model is not strictly a figure unless it is displayed intuitively. Thanks to 3D printing technology, 3D models are not limited to virtual spaces. The model can be visually displayed with two-dimensional images through a process called three-dimensional rendering, or used for non-graphic computer analogies and calculations. There are specialized 3D computer graphics software to create three-dimensional images for users.

Pixel art

Pixel painting is a form of digital art that uses raster graphics software to edit pictures at the pixel level. The graphics used in many old (or relatively limited) computer games, video games, graphics computer games, and many mobile games are usually pixelated.

Vector graphics and raster graphics

Vector graphics format and raster graphics are complementary, raster graphics are composed of a large number of pixels, usually represented by photographic images. Vector graphics use shape and color coding materials to form images, which can be more flexible in color rendering. When using vectors, it is best to use vector tools and formats; when using raster graphics, it is best to use raster tools and formats. Sometimes two graphics are used at the same time. Understanding the advantages and limitations of each technology, as well as the relationship between them, can be better used and more efficient when using tools.

Computer animation

Computer animation is the art of moving images created by computers. It is a subdomain of computer graphics and animation. Although two-dimensional computer graphics are widely used in computer animation (such as Flash animation) because of stylization, low bandwidth requirements, and high-speed real-time rendering, more and more animations are produced using 3D computer graphics. Sometimes the media for animation is the computer itself, but sometimes it is other media, such as movies. It is also called computer-generated imagery (CGI, Computer-generated imagery or computer-generated imaging), especially when used in movies.

The virtual entity can be self-made and controlled by attributes such as transformation values ​​(including position, direction and size) stored in the object transformation matrix. The properties of the animation change over time. There are many ways to realize animation. The basic method is based on the creation and editing of key frames. Each key frame stores an independently assigned time value, and the key frame becomes an animation when played. You can also use 2D/3D graphics software to interpolate between two key frames to create an editable curve of the mapping value over time, and finally generate animation. Other animation implementation methods, including program animation and expression-based technology: the former concentrates the interactive elements of animation entities into attribute sets for building particle system effects and swarm simulation; the latter allows evaluation results to be returned from user-defined logical expressions , Coupled with mathematical calculations, automatically generate animation in a predictable way (in addition to the level provided by the skeletal system to facilitate control of skeletal behavior).

To create the illusion of movement, the image displayed on the computer monitor is quickly replaced by a new slightly moving image. This technique is the same as the illusion of motion used on TV and movies.

Thank you for reading. Hope this can help!
by Artist.B


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