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Dependiendo de donde vengas te puedes acercar a vvvv de diferentes maneras. Aquí podrás hacerte una idea de las principales características de vvvv agrupadas por temáticas.

vvvv es tu herramienta multi-uso de confianza.
Es un entorno de desarrollo textual/visual híbrido. Es gratuito por uso no-comercial.
El uso comercial es posible sólo bajo licencia.. license.

Hybrid Visual/Textual Development Environment

Sobre todo vvvv està pensado para desarrolladores prácticos y ofrece 4 funcionalidades en una:

un entorno de desarrollo inmejorable
a nextgeneration visual programming language
an extensive node/code library
un modo runtime en tiempo real

Además de su propio lenguaje visual en vvvv puedes programar textualmente en hlsl y c#.

Cualquiera sea el lenguaje usado, vvvv solo se ejecuta en modo runtime. La noción de parar un programa para poder re-compilarlo se queda así como un tarea obsoleta de los albores de la programación. La compilación necesaria es efectuada de forma automática sin que se interrumpa tu flujo de trabajo.

Podrás extender vvvv con tu propios nodos usando la vvvv-sdk. Muchas partes de la librería de nodos de vvvv forman parte de las contribuciones externas por parte de los usuarios por medio del addonpack y de las Contributions.

Animaciones 2D/3D

Partículas 2D/3D animadas en tiempo real. vvvv lo tiene todo con 3 diferentes motores de renderizado como SVG, DirectX9 y DirectX11* podrás cargar, animar o generar modelos 3D y aplicar texturas, shaders y iluminación a tu antojo. Con un timeline y los mas suaves filtros podrás animar tus creaciones. Añade además un motor de virtualización de movimiento Box2D/Bullet*

Más info:
Documentación sobre temas gráficos
Documentación sobre animación

Multiscreen Setups

Designed from the ground up to handle massive multiprojection installations vvvv drastically lightens the effort involved in such setups. Using a technique dubbed boygrouping™ you can make a cluster of client PCs render to the beat of a server PC and distribute content to them n'sync. Synchronized video playback, softedge, warping and blending are all just limited by your imagination.

Entry points:
Documentation on Boygrouping

Motion Graphics

Loving the likes of Photoshop and AfterEffects but loathing their rendering times and lack of interactivity? vvvv is just for you. With its plethora of professional grade texture effects* and a timeline that has no rival you shop your compositions at any resolution. In realtime.

Entry points:
Video effects and Compositing Tutorial
Documentation on Animation

Projection Mapping

Need to project on an irregular surface while preserving the intrinsic shape of your content? By providing tools that let you load/create meshes resembling your projection surface and ways to place textures on them vvvv is extremely versatile when it comes to the needs of any projectionist. Have a lot of money and need an autocalibration system? vvvv can handle that.

Entry points:
manual: How to project on 3d geometry
auto: BSM Auto Alignment with vvvv

Data Visualisation

Need to get a better view on endless lists of data? vvvv is a pro in helping you do just that. Read from disk, database (MySQL, PostgreSQL/SQLite/SQL/Odbc/OleDb*) or the network (HTTP, UDP,..), parse (xml, json, csv, regexpr,...), transform and draw (SVG, DirectX) large amounts of data with just a few clicks. Export your visualisations as vector graphics, still images, movies or just lists of even more data. With its paradigm called spreads™ vvvv makes it a childs play to handle large amounts of data.

Entry points:
Documentation on Spreads
Parasitic Design Tutorials

Physical Computing

Wii*, Leap, Kinect*, Occulus Rift*, Arduino*,... vvvv does them all. And even more by offering readers/writers for most common standard protocols like MIDI, OSC, TUIO, DMX, HTTP, TCP, UDP to name only the hottest. Plug and Play at its finest. And also multitouch.

Entry points:
book: http://prototypinginterfaces.com
Documentation on Inputs and Outputs

Sound

Multichannel audio playback, FFT analysis, ASIO and whatnot. While vvvvs audiocapabilities can not compete with the likes of PD and MaxMSP it covers a wide range of applications that you'll come across in your daily multimedia needs.

Entry points:
Documentation on Audio

Computer Vision

Motion and face detection, color, blob, face and skeleton tracking, gesture recognition... you choose. With easy access to devices like the Kinect* and the Leap and libraries like OpenCV* vvvv is your perfect companion when it comes to quickly prototyping computer vision applications.

Entry points:
The Image Pack
Documentation on Video

* several parts of vvvvs node/code library are user contributed:
vux: DirecX11 (via DX11 pack), Box2d, Bullet, PostgreSQL, SQLite, SQL, Odbc, OleDb (via addonpack)
elliotwoods: OpenCV (via ImagePack)
unc, lecloneur: texture effects (via addonpack)
woei: advanced spread operations (via addonpack), GPU splines (via contributions)
dottore: MRE - Multipass Render Engine (via contributions)
These are only the biggest contributors, many more are contributing smaller bits.

You might also want to check the Galleria to get an impression of what people do with vvvv.