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VL

VL is a new visual programming language supported in vvvv that combines dataflow paradigms with features from object-oriented programming. It builds directly to the .NET Intermediate Language and can also consume .NET libraries. vvvv and vl work together in harmony. Whenever you're stuck in vvvv with expressing a certain problem, VL can most likely help out. This greatly reduces the number of cases when you'll have to resort to C# as a fallback solution.

Features

Define a Particle with properties (position, velocity, radius) and a create (white), update (gray) and hittest (blue) operation

Datatypes

Besides primitive data types like String, Value, Color,... VL allows you to patch your own complex data-types with custom behavior and lets you create and manage dynamic instances of them.

Iterate over the Particles in a spread and keep those whose lifetime is < 100

Loop regions

In vvvv all looping is handled via automatic spreading inside the nodes. VL hands this power to the patcher which opens up a whole new world of possibilities.

Patch operations without specifiying a datatype for its inputs or outputs

Generics

Generic programming, the implementation of operations irrespective of the concrete data type used at runtime is widely supported in modern programming languages. In VL, however, it is the default, which is very useful for creating libraries that work for any data type.

Trigger the execution of a webrequest in an async region to not block the mainloop

Async Regions

Sometimes parts of a program take longer to compute but should not block the mainloop. For those scenarios VL has async regions. Anything inside them gets computed on a background-thread and reports its result when finished.

Decide at runtime whether to order by time or id

Delegates

In VL, operations can be passed over links. Like this a patch can invoke an operation at runtime that has not been explicitly specified before. A powerful pattern in modern programming that makes generic and modular patching a breeze.

Handle midi-events as they occur and only send controller messages to the midi-output (without touching the mainloop)

Observables

VL embraces observables to do event handling. This approach works well together with the dataflow paradigm and is very flexible.

Getting Started

VL is included with vvvv since version beta35. Here is what should get you going:

VL in use

A couple of nodes shipping with the vvvv library are already relying on vl internally. Here is an incomplete list, just to give you an idea:

  • Editing Framework (Cameras, Point- and BezierEditors)
  • Arduino/Firmata nodes
  • TUIO encoder and decoder nodes
  • Midi File Reader

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Shoutbox

~4h ago

svdk: I plan to release all the patches involves as soon as they're cleaned. Greeting from Strasbourg

~4h ago

svdk: hi!saw you had a lot of fun @node 17.Disappointed I couldn't make it!. Some video I made using vvvv 4some parts. https://goo.gl/1UM8Bp

~12h ago

okvrdz: @joreg Thanks!

~17h ago

sunep: happy Birthday @tonfilm

~20h ago

microdee: @synth: care to make an issue on github with console output?

~1d ago

synth: @microdee cant install DX11 with it, cant choose not to install it either. Cant install anything without disregarding dependensies

~1d ago

joreg: @okvrdz i recommend starting here: topics it should give you a good overview of what's all there

~1d ago

microdee: vpm is updated and DO update as it fixes an issue with new latest DX11 script https://github.com/vvvvpm/vpm/releases/latest

~1d ago

okvrdz: to those experienced v4 users... What in your opinion is the best/easiest way to learn nodes and what they do/usage/capabilities?

~2d ago

bildwerk: @jzzxh its on the todo list :)