Animating Properties of GLSL Shaders in VDMX

When writing GLSL shaders that run as generators or are used as image filters, one of the most fun parts of the process is playing with different control functions to animate all of the various variables that you've created in the composition. Using the ISF specification, GLSL shaders can publish their uniform variables so that host applications can provide user interface controls that can be connected to MIDI, OSC, DMX or other data-sources for automation.

In this tutorial we will look at adapting an existing GLSL shader into ISF, publishing some of its variables as uniforms, and loading the composition into VDMX where we will animate its properties using a variety of different plugins and MIDI input.

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Blair Neal's Survey of Alternative Displays

For anyone currently working in the field of live visuals, one of the most exciting areas of bleeding edge technologies is on the side of displays – the place where people look at to see the amazing imagery coming out of our computers. There are a lot of new – and ancient – techniques to learn about and along with that a lot of new information to take in – all of which our good friend Blair Neal covers in his recently updated blog post “Survey of Alternative Displays”

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Loops – Performance, Production, and Progression

The heart of almost every VJ / Visualist performance is the loop. There are lots of techniques and training for the production of loops, but there are some common approaches and methodology of creating a “pack” that are explored in this guest tutorial by Colin Evoy Sebestyen. To demonstrate these ideas Colin breaks down a project he created with musician Nonagon for a performance series at The Tech Museum of Innovation in San Jose.

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How to create a retro Halloween visual style in VDMX

Creating the right look for Halloween and other spooky themed events is one of those tricks that every visual artists needs to have in their go to bag of tricks. There are lots of different techniques that can be used and in this guest tutorial we are joined once again by Colin Evoy Sebestyen for a demonstration of how to use a combination of LUT based FX, real-time video generators and logo images to create a retro horror film graphic scene in VDMX. In particular this look is inspired by intro sequences like the one from The Gate and more recently Stranger Things.

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Mixing, Adjusting and Generating Complementary Color Data-Sources in VDMX

While Quartz Composer is mainly used for creating interactive video sources and FX, one of of the other powerful ways it can be used in VDMX is to create your own custom plugins that can generate values or manipulate data-sources that can be used to drive other parameters in your setup. Another great thing about this feature is that once these compositions are created they can be shared and easily installed on different computers so that other people can take advantage of the new functionality.

For this tutorial we'll be looking at three very simple Quartz Composer compositions can be used within VDMX for manipulating color data-sources in particular.

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How to do a NYE Countdown

One of the biggest nights for live visual performers is New Years Eve and in particular there is responsibility in particular that can be unexpectedly tricky to get right. That is handling the countdown to midnight. Often it can mean coordinating with other performers or workers at the venue. Depending on what is required of you during the show there are a few different approaches you may want to take when setting up your projects. It also helps to have an idea in advance of what your options are for running a visual countdown.

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Introduction to The Timecode Plugin

When designing preplanned shows and working alongside other software, one of the common tasks is keeping the timing of everything in sync. Within VDMX there are two main ways of working with time – the Clock plugin which is used for working in measures and beats and the Timecode plugin which counts in SMPTE time.

In this set of tutorials we'll cover the basics of using the Timecode plugin which publishes several data sources in VDMX, and is capable of both receiving and sending SMPTE timecode in a variety of formats.

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Using VDMX as a Syphon Mixer

One of the best things about being a VJ on the Mac these days is Syphon which makes it possible for all of the different tools that are available to work together in countless ways. Within VDMX it is possible to have as many Syphon inputs and outputs as your computer can handle, which allows for it to be used as a source, mixer, FX processor or final output for other software you may want to work with.

In this video tutorial we'll look at a simple use case for connecting several Syphon enabled applications to and from VDMX by creating a two channel mixer that fades between two Syphon sources and publishes back out for other applications to use.

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Analyzing multi-track audio from Live in VDMX using Soundflower

For musicians working in Ableton Live or other multitrack production software one of the most useful tricks for driving real-time visuals is to output each sound track on a different set of audio channels before they are mixed together to get more accurate results for each sound when performing audio analysis in VDMX.

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Connecting VDMX and Unity3D by Syphon

While mainly designed for cross platform game development many Mac VJs take advantage of the Unity3D engine for the purposes for creating 3D worlds and other real-time generated graphics for use in visual performance. By connecting these environments to other VJ applications like VDMX over Syphon and OSC we can control these worlds and mix, process and output the virtual camera signals from a scene like any other live media source.

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Luma Key Techniques for Layer Composition

One of the most powerful techniques for combining multiple layers of video into an output is the use of masking, also known as luma keying. With this process, two video sources are combined to create a "cut out" layer that can be composited over others image like a collage instead of simply blending them together. This style is commonly found in music videos, graphic design, and by VJs for live performance. Masking is also an important technique used when projection mapping video onto surfaces.

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More Fun Audio Analysis Techniques

Using individual plugins to directly automate the control of different aspects of a video performance or interactive installation can create some pretty awesome results, but one of the most powerful capabilities of VDMX is the ability to connect these plugins to each other to create more complex behaviors and visual effects that can be switched between during live VJ performance.

For this set of tutorials we'll look at a few ways that the Audio Analysis plugin can be used alongside the LFO plugin and standard interface controls as a demonstration of this technique.

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Using a Step Sequencer to trigger media clips

Along with being able to control any standard UI elements like sliders, buttons and color pickers, tracks in the step sequencer plugin in VDMX can be used to automate the changing of the media files playing back on a layer and create visuals rhythms. This general technique can be useful for a lot of projects such as VJ performances and building interactive video installations.

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Connecting the x-OSC wireless I/O board to VDMX

For this guest tutorial we are joined by Will Reardon, a motion designer and artist, currently developing video art objects. Currently Will is using VDMX and the x-OSC I/O board to create a device similar to his previous ‘Compendium’ with added interactive functionality.

We'll start by making a basic test connection between the software and hardware over WiFi, then begin to add a series of sliders and knobs to VDMX that receive values from the I/O board analog inputs.

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