Component-based designs rely on separating the multiple logical attributes of business objects and game objects into small components dedicated only to specific tasks. Whereas game objects are usually modeled to reproduce the attributes and behavior of "real world" objects by aggregating them ...

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Responsibility of rendering in a component/entity game engine

I am developing a simple component/entity game engine in C# (https://github.com/alexvm/BlueShift) and have a few questions regarding the responsibility of certain items in the engine itself. I have ...
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3answers
117 views

How do I define a required component on a Unity game object?

I have a script that expected the game object to have a Terrain component. Is there an attribute I can add (or some other way) which will prevent a designer from adding my ...
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1answer
122 views

Who Handles Collision in a Component Based Entity System [duplicate]

I kind of stucking at my current plattformer protoype for learning the component based entity system pattern. I have CollisionComponent and a CollisionSystem. The CollisionSystem checks every frame ...
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28 views

How do you use Lua with several game objects / components?

I haven't found a lot of information / tutorials on this subject, so I figured I'd ask here. I would like to use Lua-Alchemy (the Flash port of Lua) to be able to load scripts and run console-like ...
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1answer
142 views

Trouble Using Component Base Pattern

I am trying to use a component based pattern on my new project. The last projects I did the old fashioned way. Base class and derive from that until your brain hurts. This time I wanted to do it on a ...
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2answers
122 views

How to cleanly serialize/de serialize a Dictionary whose values are of a derived class using c# newtonsoft json [closed]

I am working on and entity component system and I am storing entities as a JSON file. Components are stored in an entity as a Dictionary of components. I am using newtonsoft's JSON library. After ...
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3answers
100 views

Building a C-E engine in a high level language, how can I integrate optional lower-level components that own overlapping state?

To clarify, by overlapping I do not mean overlapping between said components, but rather, let's say I have: My entity contains components, and a parent-children system. Call it a mandatory Hierarchy ...
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2answers
63 views

Handling differing inventory items on use interactions

Hey there my fellow programmers. Looking for a little input into a potentially smelly code problem (I was about to post this on the Code Review SE, let me know if that's the more proper place). After ...
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1answer
75 views

How to deal with tags in a component

I have a component called "ReflectOffCollision". This component should obviously not need to be aware of specific details about the game such as tags. The problem is, I want to apply this script to an ...
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2answers
181 views

Handling player and AI in a component based structure dynamically?

I'm trying to find a way to allow both input and AI to call actions of an actor in a component based structure for a 2d turn based game. The actions make use of the components. To keep the system ...
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2answers
72 views

Gameobject-Component model with many background tiles - long iteration time

So I'm making a game engine for a game I'm making - the game is a 2D tile-based game I've implemented a gameobject-component style for the engine, for decoupling reasons However, every frame, the ...
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2answers
311 views

Entity Component System Coupling

Lately I've been working on a small personal project which is basically an Entity Component System framework with autoupdated Systems. While I have a pretty good idea on the way the framework should ...
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1answer
96 views

How can I resolve component types in a way that supports adding new types relatively easily?

I am trying to build an Entity Component System for an interactive application developed using C++ and OpenGL. My question is quite simple. In my GameObject class I have a collection of Components. I ...
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4answers
394 views

Executing Components in an Entity Component System

Ok so I am just starting to grasp the whole ECS paradigm right now and I need clarification on a few things. For the record, I am trying to develop a game using C++ and OpenGL and I'm relatively new ...
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2answers
206 views

Implementig State-driven agents in an Entity-Component-System

A state-driven agent is an agent that performs an action based on its current state. The logic can be implemented through the use of a D-FSM that changes state depending on the Agent's "perception" ...
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1answer
271 views

How can I correctly use an unordered_multimap as entity and component storage?

The Setup I've made a few games (more like animations) using the Object Oriented method with base classes for objects that extend them, and objects that extend those, and found I couldn't wrap my ...
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2answers
105 views

Data oriented design vs visibility

I'm almost sold on the concept of a data oriented engine -- however, one thing still eludes me. If we pack the data from a large level into huge arrays and go over them, any visibility system that we ...
2
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1answer
169 views

How should an object that uses composition set its composed components?

After struggling with various problems and reading up on component-based systems and reading Bob Nystrom's excellent book "Game Programming Patterns" and in particular the chapter on Components I ...
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2answers
270 views

What are the advantages of having component logic in a “system” versus the component itself?

For the past few days I've been trying to make my first game. I did some research on usual development practices and patterns and I settled on a composition system where the different components ...
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1answer
90 views

Adding Components (classes) to unordered_map in Entity? (Possible typeid as key issue)

I've got a little test put together that has a couple simple Components that are supposed to be added to an Entity, but the addComponent function isn't working; I think it's got something to do with ...
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2answers
242 views

Component based architecture: “pure” or some inheritance?

(I asked a similar question, but it had more questions inside it and I feel it wasn't clear enough, so I'm opening a new one). Until recently I implemented all my games using an inheritance ...
2
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1answer
157 views

Viewing one of multiple worlds in a component entity system?

I've been working on a space simulation game. The player can control a ship and fly through wormholes to get from one solar system to another. I would like the player to be able to switch the camera ...
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1answer
89 views

Passing a list of existing entities to a new client when using a component system?

My game server uses entities containing components to represent everything in the game world. This has worked great so far but I've run into a problem now that I'm allowing clients to connect to the ...
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5answers
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How can I efficiently implement a bitmask larger than 64-bits for component existence checks?

In my ECS implementation, I use bit-wise operations (as described and illustrated in this thread) to tell an entity what type of components it currently consists of. So my Entity class has the ...
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3answers
480 views

Entity Component System for HUD and GUI

This is a very rough sketch of how I currently have things designed. It should, at least, give an idea of how my ECS is currently designed. If you notice in that diagram, I have basically split ...
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1answer
157 views

Where to put my entity component messaging functionality?

I've done my research and read as many articles and posts on messaging and ECS's as I could find to help me get mine working. However, I'm at a roadblock on how to get my messag functionality to be ...
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2answers
346 views

Why are entities in a component system composed at run time?

Why are entity component systems the way they are? For example as far as I have seen it may look like this class Entity list of components add component remove component update ...
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2answers
345 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 ...
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2answers
686 views

Entity Component System, weapon

I'm new to game programming and currently trying to understand Entity Component System design by implementing simple 2d game. By ECS I mean design, described here for example In my game I have ...
2
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1answer
228 views

Making more complicated systems(entity-component-system model question)

I'm using a model where entities are collections of components and components are just data. All the logic goes into systems which operate on components. Making basic systems(for Rendering and ...
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1answer
329 views

Separating components and logic

I've been working on how to build some of my game systems using components and systems. I'm having a little trouble following the approach that components should just be bags of data and systems ...
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1answer
178 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 ...
0
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3answers
1k views

how to add different class items to the same list C# XNA

I am trying to make a modular ship system, where parts can be added or removed to the ship entity. I am using a class I made called ModuleManager and it has a list of ShipModules. this works fine for ...
9
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2answers
956 views

Entity/Component System and UI “Entities”

I'm still green to entity/component systems. I find that since I have useful components for drawing sprites (or spritesheets) and handling input (mouse/touch clicks), I naturally want to reuse these ...
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1answer
874 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 ...
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1answer
185 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 ...
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1answer
291 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 ...
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1answer
556 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
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2answers
269 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, ...
6
votes
2answers
305 views

Where to put Entity Death Events in a Component/System Design

Entities in my game are nothing more than a collection of components, tied together with an entityID. I have (near) data-only components, and systems that work on the data. One of these components is ...
1
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1answer
243 views

Should I use an abstract class or function pointer to implement component notifications?

I want to create a component-based game engine with subsystems which do the work, entities which are simply a list of components (plus position and rotation, because every object will have that), and ...
2
votes
1answer
210 views

Component-based programming with child objects

I am presently working on a game in Unity3d and have come to a cross road regarding scripting for repetitive child objects. Should these child objects handle its own scripting for best practice? For ...
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2answers
1k views

Entity system game design and input handler

I have started create a lightweight game engine with Ogre and C++. I have a abstract component class and an abstract entity class. #ifndef ENTITY_HPP_ #define ENTITY_HPP_ #include <string> ...
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vote
1answer
367 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. ...
3
votes
1answer
239 views

Handling actions in component based multiplayer game

Please stay with me as I explain my question. I'm creating a multiplayer game. My design pattern follows broadly thoughts described in the post here. The idea is that each actor whether be it a ...
5
votes
3answers
328 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 ...
0
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3answers
649 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 ...
6
votes
3answers
2k views

How to avoid “Blob-Systems” in an entity component system?

Currently I am facing the following problem: I am trying to write a pong clone by using an entity component system (ECS). I wrote the "framework" all by myself. So there is a class which manages ...
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0answers
685 views

Component based architecture - Rendering approach?

I'm planning to use a component based architecture for a new 3D game engine I plan to work on, however I don't know how to approach the rendering side of things. I can see two options here: Every ...
2
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1answer
379 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 ...