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Questions tagged [entity-system]

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A programming paradigm in which gameobjects (entities) are composed out of components, and are operated upon by systems. Each entity is an ID that points to specific components.

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I have two user cases: How would entity_A send a take-damage message to entity_B? How ...
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I decided I would develop a game engine in c++, so I was thinking about different ways of handling objects. I also have experience with ROBLOX, so I know that it uses an object-oriented design as ...
Bunabyte's user avatar
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5 answers
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A little bit of background, I'm coding an evolution game with a friend in C++, using ENTT for the entity system. Creatures walk around in a 2D map, eat greens or other creatures, reproduce and their ...
Alex's user avatar
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I have a working ECS-system set up, largely inspired by this brilliant article (not at all required reading to be able to answer my question) on https://indiegamedev.net/ showcasing an ECS-system with ...
JensB's user avatar
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7 votes
2 answers
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I'm drafting my game and implementing small stuff in it, but hit a roadblock. You see, for my game I would like for different items to behave the same or to share behavior, for instance, some items ...
shackra's user avatar
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46 votes
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Lately, I've been doing a lot of reading on entity systems to implement in my C++/OpenGL game engine. The two key benefits that I constantly hear lauded about entity systems are the easy construction ...
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34 votes
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After asking two questions about entity systems (1, 2), and reading some articles on them, I think that I understand them much better than before. I still have some uncertainties, mainly about ...
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In my games using entity framework (for example using https://github.com/libgdx/ashley ) help me to separate data from logic in different systems. But a problem I've found is how to handle events ...
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Let's say we have three enemies, a bear trap, a fire trap, and a minotaur. When you walk over the bear trap, the game spawns an invisible entity that, upon the player colliding with it, slows the ...
Ryan Peschel's user avatar
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I am currently creating a small hobby project to get back into game development, and I have decided to structure my entities using an ECS (Entity Component System). This implementation of an ECS is ...
Applekini's user avatar
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I am working on a small multiplayer game with rpg elements using java and "Artemis ODB". Most of the logic is already done but one important thing is missing. The persistence. So i am ...
genaray's user avatar
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2 answers
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I am considering to implement AI using ECS which actually contradicts working with naive FSMs. My current idea is to have multiple components which represent the particular state an Entity that has a <...
Christian Ivicevic's user avatar
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I'm trying to find the best design pattern for my AI code using an ECS. Right now the entities that act as CPU-controlled have components like: WeaponComponent ChargeComponent MovementComponent ...
Valerio Santinelli's user avatar
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3 answers
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This is a followup to this question, which I answered, but this one tackles with a much more specific subject. This answer helped me understand Entity Systems even better than the article. I've read ...
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Is it possible to use Hybrid ECS with some components and the standard MonoBehaviour with all your old code? I want to know because I already have some game ...
Marc Rasmussen's user avatar
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7 votes
2 answers
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I want to ask if the following is an effective way to architect event propagation using an ECS? Here is a hypothetical collision scenario using an ECS. Components: ...
Danny Yaroslavski's user avatar
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27 votes
4 answers
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I'm working on a game with a component-based architecture. An Entity owns a set of Component instances, each of which has a set ...
Jon Purdy's user avatar
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12 votes
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If an Entity has no explicit 'type' (e.g. player) and is simply a collection of components, how do I identify the entities that my systems should and should not be working on? For example, in a game ...
Garee's user avatar
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I'm planning to develop a game in C# (but I don't think that language matters) and I'll be using Entity Component System since I know by design that my game will have a lot of different game items ...
Andrew's user avatar
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4 votes
2 answers
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Recently I've been throwing problems at Entity Component Systems to see how far I can push the paradigm. One problem in particular I struggle with, which is writing an elegant implementation of the n-...
Sander Mertens's user avatar
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1 vote
1 answer
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I'm trying to get into Unity's Hybrid ECS feature. Creating and Manipulating Entities has worked fine so far for me, but somehow I can't find a viable option to delete Entities which works 100% of the ...
BloodEchelon's user avatar
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59 votes
1 answer
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Yesterday, I've read a presentation from GDC Canada about Attribute / Behaviour entity system and I think it's pretty great. However, I'm not sure how to use it practially, not just in theory. First ...
TomsonTom's user avatar
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3 answers
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Using a DOD approach, what is the typical way to handle dealing with the actual IDs of game objects? Obviously, each entity has a unique entity_id that is ...
sme's user avatar
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5 votes
2 answers
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I'm new in game development and I'm struggling to implement Entity Component System (ECS) properly, I have no idea whether I'm doing it right or completely wrong. Basically, I try to implement ECS ...
tronic's user avatar
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9 votes
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I'm not here to ask for any specific code implementation, I'm here just to make my ideas clearer. But let me explain the situation: I have already developed some little and amatorial game projects (...
Andrea Algeri's user avatar
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