DMX Template Overview | Unreal Engine 4.27 Documentation

DMX Blueprint Template

Unreal Engine 4 provides additional DMX-enabled fixtures and VFX Blueprints that you can use within your projects or use as a foundation to create your own. These are showcased in the DMX Template, including the following.

An updated and improved C++-based modular DMX fixture system that enables you to toggle available sub-features such as pan, tilt, gobos, strobe, and more.
A volumetric beam shader with adjustable quality levels.
A set of base DMX-enabled VFX Blueprint Actors so that you can use as examples:
- Fireworks
- Pyro
- Water fountain
- Lasers

The following are popular categories of DMX fixtures used throughout Live Venues.

Static
Matrix/Pixel Bar
Moving Head
Moving Mirror
Strobe

The DMX UE plugin will ship with an asset pack composed of BP actors for each of the previously-mentioned fixture categories.

These actors can be placed in a level and will have the most features and attributes of typical fixtures of that category.
They have exposed Components that will allow the selection of the DMX Library and fixtures.
They contain DMX BP logic that will bind with received values to fixture attributes.

All default fixtures inherit from a base DMX fixture C++ class ADMXFixture.

DMX Components

Provided with the plugin are a set of DMX components to be used to design and configure custom DMX fixture functionality. Any actor inheriting from the ADMXFixture class can utilize the provided DMX components. These components are responsible for responding to incoming DMX packets and updating the parent actor accordingly. Each template fixture has a range of components added by default as seen below.

Each component has a set of editable properties that can be changed via the details panel on the right.

Initialize Fixture

Every fixture needs to be initialized to ensure the components and meshes respond properly to the received DMX. To do this, use the Initialize Fixture node and input the Lens mesh component and the Beam mesh component, if applicable.

DMX Input

DMX input for all fixtures happens through the OnFixturePatchReceived event provided by the added "DMX" component. Upon DMX received, normalized DMX data is pushed to all attribute components added to the BP. Each then updates and applies the change to the actor.

Attribute Animation/Interpolation

For each component, the user has the option to have the fixture characteristics be interpolated (animated) for a smoother more realistic look. Interpolation mimics real fixtures in which elements such as pan and tilt take time to move from one location due to motor speeds and hardware limitations. In the DMX Fixtures, interpolation can be changed and modified to fit the users desired looks via properties in the attribute components. Each component has two properties for controlling interpolation characteristics.

Property	Description
Use Interpolation	Enables interpolation.
Interpolation Scale	Sets interpolation speed.

All interpolation updates are handled on tick through the "Interpolate DMX Components" node.