Extend Unity’s EventSystem: Drag & Drop

In the last post I gave a quick overview over the new event system that was introduced with Unity 4.6. Following up on those basics I’d like to give you some insights about the customizations I made to fully utilize the possibilities of the event system in our current project. The first big change I made was adding a generic Drag & Drop system by using an own input module derived from the existing PointerInputModule.

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Events – Order matters

In an event-driven system like our Slash framework there comes the time when a feature becomes a bit more complex and the order in which events are triggered is important so the feature works correctly. In this post I’d like to point out how which problems occurred for us during development and how we solved it.

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Component-based entity systems: Event-driven systems to implement the logic

This post will give you another bunch of information how to implement a component-based entity system. We talked already about the way to setup a project in a clean way and the way data is stored. Now we’ll have a look where the logic of the game has its home.

On this note I’ll also explain the event-driven way of our framework. As a system is very self-contained, events are the way to communicate with other systems and the world outside a system in general.

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Component-based Entity Systems: Project Setup

In the last two posts I talked about data binding and an asset called Data Bind for Unity I created to use it with Unity. There are more important things in a game than a clean separation between logic and presentation though. But when we started our last work-for-hire project, I realized that our foundation for the game logic was already in a very complete state, so I could concentrate on other parts of the architecture.

At Slash Games Nick and I created a framework (called “Slash Framework” of course 😉 ) which we could use for a wide range of projects. The framework is based on an approach called Component-based Entity Systems or CBES.

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