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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2
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2answers
254 views

In a ES system, how one would implement/ deal with Modifiers?

Given the normal entity-component-system architecture, lets say we a component that give the entity Strength. Now on the game flow I want to give +4 strength do to the wielded weapon. What would be ...
0
votes
1answer
204 views

How to keep Input System and Graphics System separate?

I want to keep Input System and Graphics System separate, but the Window Handler that's created by graphics component make everything really hard. How should I approach this situation?
0
votes
1answer
568 views

Superclassing RPG Game Entities [closed]

I am in the design process of an RPG game and I have no experience at all in game dev. This question is about how I should approach entity management using OOP classes. My train of thought is as ...
21
votes
5answers
5k views

Implementing features in an Entity System

After asking two questions on Entity Systems (1, 2), and reading some articles on them, I think that I understand them much better than before. But, I still have some uncertainties, and mainly they ...
9
votes
2answers
374 views

Efficiently separating Read/Compute/Write steps for concurrent processing of entities in Entity/Component systems

Setup I have an entity-component architecture where Entities can have a set of attributes (which are pure data with no behavior) and there exist systems that run the entity logic which act on that ...
2
votes
2answers
312 views

Handling cyclic dependencies in entity/components system

I built an rather standard C++ entity/component system (a bit like this one). Components can access other components through their associated Entity. This is usually done by getting some kind of ...
1
vote
1answer
276 views

Need opinions on my component based design [closed]

I have an Entity class and a Component class. The Entity class has a list of attached components, and each component also has a member variable that is a reference to the entity that it is attached to ...
2
votes
1answer
294 views

Entity system and rendering types

I would like to implement entity system in my game and I've got some question about entity system and rendering. Currently, my renderer got two types of elements: Current design Mesh : A default ...
1
vote
1answer
166 views

Dealing with sprite loading and setting in an entity-component system

I've just started using an entity-component system for the first time and I'm having trouble making some decisions. Currently I've got a SpriteComponent that holds a sprite, a ...
2
votes
2answers
310 views

Confusion about systems implementation of ECS

For reference I am mostly imitating the architecture in this tutorial, the "Entity System" section: http://www.raywenderlich.com/24878/introduction-to-component-based-architecture-in-games NOTE: the ...
2
votes
1answer
767 views

Using an Entity System Architecture with Task Based Parallelism

Background I have been working on creating a multithreaded game engine in my spare time and I currently trying to decide the best way to work an entity sytem into what I have already created. So far, ...
3
votes
1answer
437 views

Entity systems, creating new entities?

How do I create new entities (the collection of their components) in an entity system? I have space ships in my game, for example, they need a lot of information set in their components when I create ...
3
votes
1answer
163 views

Controlling Constantly Running AIs

So, I'm not really sure where to start with this question. Feel free to tell me I'm stupid and Off Topic but I'd also like you to tell me why. So, the maps in the game I am designing will consist of ...
9
votes
2answers
6k views

Entity Component Systems with C++ - Accessing components

(What I'm describing is based on this design: What is an entity system framework?, scroll down and you'll find it) I'm having some problems creating an entity-component system in C++. I have my ...
5
votes
3answers
767 views

When two moving objects collide, which one sends the message, and which one recieves it?

I am writing a platform game using an entity-component system. Entity-World collisions are robust and work very well, and I'm now working on collisions between entities. Just to be clear, in my code ...
2
votes
2answers
118 views

Design problem with specific requirements (logical dependencies needed)

I started to write some code for a small 3D environment. This week I wanted to start with my entities and when I thought about it again, I stumbled across some unmet requirements. My design works fine ...
2
votes
1answer
171 views

Registering and (more importantly) Unregistering with Message Server

I've finally implemented an extendable message class and messageServer class. The message class dynamically assigns a unique static ID to each derived message type (ex. ObjectCreatedMessage might be ...
2
votes
1answer
774 views

Entity Component Systems, Input, and Angry Birds!

I am using Artemis ECS. I have the very basics of a game already. I am now trying to determine how to gracefully handle input and to a lesser extent collisions. Some people say with ECSs, everything ...
4
votes
1answer
392 views

Box2D Joints in entity components system

I search a way to have Box2D joints in an entity component system, here is what i found : 1) Having the joints in Box2D/Body component as parameters, we have a joint array with an ID by joint and ...
6
votes
1answer
519 views

How would one store global context data in an entity component system?

My question is this: How would one store global context data, ie. world data information, current world time, etc in an entity component system? I'm think of working towards building a Dwarf ...
3
votes
1answer
744 views

Entity property system

In lieu of a typical implementation of entity-component systems, I've gone the data-oriented route described by Jason Gregory in Game Engine Architecture. This works really well for common properties ...
2
votes
1answer
131 views

Timestamps as ids in an entity manager?

I've built my own entity manager, as I found out some days ago, it is very similar to the Artemis framework. For now, I just use integers as entity ids. Behind the scenes, there is a simple integer ...
5
votes
3answers
282 views

Mismatch of Entity System and Savegames

There is a theoretical mismatch of the entity system and the savegame system, which is think is common, but I haven't found resources about that. Therefore I will explain both systems first, as short ...
1
vote
1answer
353 views

AI of Turn Based game using Entity System approach

I just recently learned about Entity Systems and want to try it out on a real example (I was developing a game recently and want to try to port it over Entity Systems). But I got problem right away. ...
6
votes
4answers
697 views

Identifying Entity 'Types' in an Entity-Component System

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 ...
3
votes
2answers
264 views

Target a specific Entity in a Component-Entity design

I'm starting to work on a game with Entity-Component Model Architecture (Artemis in C#). I'm beginning with something pretty simple, entities which are living things, with HealthComponent, ...
2
votes
1answer
331 views

Approach to AI in Entity Systems

We are making game using Entity Systems. And we with my colleague have different opinions about what approach is better when doing AI. Basically, he thinks that everything should be a system, where ...
5
votes
3answers
312 views

How can I achieve strong typing with a component messaging system?

I'm looking at implementing a messaging system in my entity component system. I've deduced that I can use an event / queue for passing messages, but right now, I just use a generic object and cast out ...
9
votes
3answers
774 views

Grouping entities of the same component template to linear containers

EDIT: Looks like people are actually doing this! http://www.randygaul.net/2013/05/20/component-based-engine-design/ Another example of using this data accesing pattern. I've done a lot of research ...
1
vote
1answer
881 views

Entity-System Architecture; Pools and Factories

I'm creating a 2D game based on entity-system architecture using C++, the C++ port of Artemis, and SFML. I've had to jump through a few hoops, but it's been fairly smooth until now. In this game, I ...
22
votes
4answers
2k views

Appropriate level of granularity for component-based architecture

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 of Slot instances with which to store, send, and receive values. Factory ...
1
vote
1answer
153 views

Positioning sprites in a Component-Entity engine

I'm building my first component/entity engine and I'm not so sure about some of my choices. I'm here asking suggestions on my first doubt. I draw objects with 2 different behaviours: 1) Position ...
4
votes
2answers
1k views

Allocating Entities within an Entity System

I'm quite unsure how I should allocate/resemble my entities within my entity system. I have various options, but most of them seem to have cons associated with them. In all cases entities are ...
3
votes
1answer
711 views

Entity System with C++ templates

I've been getting interested in the Entity/Component style of game programming, and I've come up with a design in C++ which I'd like a critique of. I decided to go with a fairly pure Entity system, ...
0
votes
3answers
594 views

Rendering order in an Entity System

Say I use a basic ES approach, and also inside Systems I hold lists of all entities that Systems are required to process. How do I maintain this list of entities in desired rendering order, i.e. for ...
90
votes
9answers
10k views

Entity communication: Message queue vs Publish/Subscribe vs Signal/Slots

How do game engine entities communicate? Two use cases: How would entity_A send a take-damage message to entity_B? How would entity_A query entity_B's HP? Here's what I've encountered so far: ...
21
votes
3answers
5k views

How to properly implement message handling in a component based entity system?

I am implementing an entity system variant that has: An Entity class that is little more than an ID that binds components together A bunch of component classes that have no "component logic", only ...
3
votes
1answer
887 views

Movement & Physics in an entity-component system

I'm currently playing around with entity-components systems and got started on the movement/collision/physics parts and would like to have some pointers! It's a basic 2D sidescrolling game, with the ...
2
votes
1answer
275 views

Where to put common System functionality in Entity-System Design?

I am working on an Entity System design based largely off of Adam Martin's design and Ray Wenderlich's Objective-C Implementation. I am working on the AI system using a state machine with a System ...
2
votes
1answer
353 views

Questions about the details of implementing a component-based entity system [closed]

I started reading about component-based entities, and overall it seems like a good idea, but many of it seems to skip over a lot of details and not give many real examples, so there are things that ...
1
vote
0answers
116 views

Events with Entity Component Systems [duplicate]

I'm currently working on an HTML5 top-down simple RPG game, and as a learning experience I'm building my own little engine from scratch. After reading around a little I decided to go with the Entity ...
2
votes
1answer
318 views

Different kinds of movement in component based entity system

I am writing a pong clone with a component based entity system. But I am having trouble with the different kinds of movement in the game. The problem is the following: My paddles will just move up ...
2
votes
1answer
1k views

Tilemap collision in component based entity system

I am trying to set up a collision system for a tilemap in my component based entity system, but having trouble with figuring out how to do so. Currently I have the following approach: My tilemap ...
11
votes
2answers
4k views

Game state and input handling in component-based entity systems

My question is: How can I handle game states in my entity system, without resorting to keeping a stack of game state objects around? So the design of my entity system means that when an entity needs ...
1
vote
2answers
498 views

best structure to handle entities in an entity component based game engine

I am trying to develop a 2D entity component based game with multiple layers as tilemaps (front or back from the scene). I currently handle the tilemap layers in a 3 dimension array[z][y][x]. Each ...
1
vote
2answers
293 views

Entity Component Model - Creating The Component “Watcher”

Hello Stack Exchange, I apologize if this has been asked already, but I couldn't find an answer through searching...probably due to being unable to describe what I am looking for very well. So, ...
5
votes
1answer
272 views

Design to handle logic within a state

I am designing a new game and I am trying out the entity-component design where entities are comprised of groups of components holding a bunch of attributes. I also have a stack of 'game states' and ...
-1
votes
1answer
309 views

Overload C++ functions in lua [closed]

I have had a look around but I believe this to be impossible due to compile time of c++. However is it possible to have a class registered in lua and c++ that has a overload update function which I ...
5
votes
0answers
350 views

Techniques for incorporating physics engines like Box2D into a Component-based Entity System [closed]

Currently i'm working with my own physics engine, however given the fact that the emscripten ports have gotten incredibly good, i wanted to try and incorporate Box2D into my entity system for the next ...
0
votes
2answers
230 views

Hex tile systems and the efficient use of classes

So I've built myself a system of classes for what I think is an efficient way to describe an entity that would live in my game. Is this an effective approach or am I creating entities that are too ...