How code is structured. For questions on the internal design of a game engine.

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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 ...
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1answer
89 views

Sending entities to connecting player

When a player connects to a game, he needs to be sent all the entities currently on the map. This is done by creating entities one by one. Three ways of implementing this come into my mind. Which one ...
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4answers
757 views

How to determine range of possible movement in turn-based, distance-based strategy game?

I'm creating a 2-dimensional, turn-based strategy game using c++ and SFML-2.0. Movement is distance-based rather than grid-based, with several different triangle-shaped pieces that, on a given turn, ...
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1answer
796 views

Best Practices for class usage and game architecture

I'm making a 2D game similar to mario in Java. I have some questions about class organization and proper method usage. I have the following classes: Main: runs the game in a JFrame GamePanel: ...
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1answer
162 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 ...
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5answers
3k views

Entity System creating Components

Over every entity system I see implemented in C++, or even in Java/C# (e.g. the Artemis framework). I see components not allocated via a new operator (or something similar, e.g. std::make_shared). For ...
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3answers
409 views

Object of arrays or array of objects?

I'm making a management sim game, something along the lines of Roller Coaster Tycoon. I want to know what the best way to structure my world objects is so to maximise performance. Let's say I have ...
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3answers
984 views

Grouping entities of the same component set into linear memory

We start from the basic systems-components-entities approach. Let's create assemblages (term derived from this article) merely out of information about types of components. It is done dynamically at ...
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2answers
840 views

Mobile Multiplayer games and coping with high latency

I'm currently researching regarding a design for an online (realtime) mobile multiplayer game. As such, i'm taking into consideration that latencies (lag) is going to be high (perhaps higher than ...
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2answers
2k 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 ...
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2answers
500 views

Level Representation in a 2D Game

I would like to create a 2D game, where a character should move on a stage/level. My stage would be static, constructed some little cubes, similar to the well-known Mario game: some of the elements ...
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4answers
411 views

Networking gampeplay - Sending controller inputs vs. sending game actions

I'm reading about techniques for implementing game networking. Some of the resources i've read state that it is a common practice (at least for some games) to send the actual controller input across ...
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3answers
844 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 ...
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1answer
691 views

Material System

I'm designing Material/Shader System (target API DX10+ and may be OpenGL3+, now only DX10). I know, there was a lot of topics about this, but i can't find what i need. I don't want to do some kind of ...
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2answers
324 views

Important aspects to consider while making a technical design document

I'm working on a open world strategy game for which I'm planning to make technical design documentation. How do we decide exactly what we need to include to ensure the design document is as complete ...
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2answers
552 views

How do I make good guy attacks only hit bad guys and vice versa?

My game has many different type of good guys and many different type of bad guys. They will all be firing projectiles at each other but I don't want any accidental collateral damage to occur for ...
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0answers
140 views

Resource/Asset Manager [duplicate]

I'm creating a ResourceManager. At the beginning i'm creating a groups of resources which contain a map of resources. The role of groups is to quick load/unload resources, to find some constant, never ...
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3answers
637 views

Desire advice on implementing this animation timeline system

I have read a lot of questions on here, as well as books regarding game architecture. I have a general question about the implementation of a game's animation timeline, on which many isolated ...
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1answer
123 views

How can I implement something like Destiny's public events?

Bungie has shown a gameplay trailer for their new game, Destiny. The part that really stood out for me was the 'public events' that can happen randomly while playing. Now I've thought about it for a ...
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4answers
2k views

If two objects interact, what holds the interaction code?

Think of a bullet and an enemy, or the player and the floor. If these objects interact, what holds the interaction code?
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1answer
191 views

simple adventure game mechanics stored in database

I plan to code a little adventure-like game. To be able to build multiple episodes without deploying new code I want to store any information possible in the database. This includes stuff like ...
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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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1answer
1k 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 ...
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1answer
576 views

Combining 2D and 3D in game engine

I've implemented basic 3D functionality and made little "2.5D" demo in orthographic projection using OpenGL ES 2 and Box2D. Now I want to make completely two-dimensional game (using sprites) and ...
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1answer
125 views

Picking game entities

What is the preferred methods for doing so, performance-wise? For example I want to pick certain objects in an area around a given point. What I have thought off so far is using invisible objects as ...
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1answer
947 views

What underlying character stats would you put into your “character” object in an RPG engine

basically I'm making my own RPG/TBS engine named Uruk (making an rpg themed about the epic of gilgamesh) and I am thinking of a combat system similar to the Disgaea franchise or the Super Robot Wars ...
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1answer
82 views

Object generation from an existing object in a game engine

To simplify, let's say in en engine I'm coding for a game, I have the Main class an Object class. In the Main class' update method, I loop through the array of all Objects in the game. I also have a ...
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2answers
7k views

OpenGL - Understanding the relationship between Model, View and World Matrix

I am having a bit of trouble understanding how these matrixes work and how to set them up in relation to one another to get a proper system running. In my understanding the Model Matrix is the matrix ...
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0answers
689 views

Component based architecture - Rendering approach? [duplicate]

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 ...
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0answers
45 views

Export matrices or IPOs? [closed]

I'm currently working on an exporter for Blender and corresponding importer for my engine, but I believe the same concepts apply to any other 3D animation software. When it comes to export animation ...
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1answer
263 views

When to use GameComponents?

I know what it is and I'm using it as a frame counter for example. But when should I use it? Does it make sense to say "I make all the input handling happen in a gamecomponent"? Is it flexible enough ...
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1answer
285 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 ...
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2answers
753 views

How to make a “GUI In Game”?

My game is very GUI based, the way how it works is that I have a GUI class, which contains the basic GUI elements, a parent GUI object, and a copy of the main game's class object. The game starts out ...
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0answers
131 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 ...
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2answers
313 views

Using a programmable pipeline in a game engine

As a learning experience, I'm developing my own 3D game engine using OpenGL. I'm a little confused as to how to implement my rendering engine such that it uses a programmable pipeline while still ...
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6answers
7k views

Do you actually use diagrams to model games? [closed]

I mean mostly UML but any method that works is viable. So - do you actually model your games with UML/other diagrams or different methods? I had a subject at my university about modelling with UML and ...
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1answer
365 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 ...
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2answers
341 views

Separate classes communication

Lets say I have a key and door. My third class (player) needs to pick up a key and open the doors. How should those objects communicate without making too much dependencies between them?
2
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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 ...
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2answers
264 views

Correct utilisation of gameloop (Android)

When using a gameloop like (much simplified)............ updateLogic(); render(); How does one perform 'single' operations? I mean, things like triggering sounds (which will only be played once), ...
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5answers
764 views

How can I update Display settings from an Options screen without restarting?

I'm currently creating a 2D RPG in C++11 with Allegro 5 and boost. My goal is to somehow update my game settings when an option is changed in the Options Menu. I don't want to force the user to ...
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0answers
51 views

User interaction and Component based architecture [duplicate]

I'm working at my first game and I've decided to build a simple component based engine. I found really useful to work in that way but I still miss some fundamentals probably. Let say that I have a ...
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2answers
123 views

making different kind of bullets [closed]

I have an enemy which shoots 3 different kind of bullets. They are of different sizes, speed, and representation (rectangle, oval, and a more classic bullet). Should they be 3 separate classes or ...
4
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1answer
168 views

Game State and Configuration via Events

Often "singletons" are problematic for testing, so with my next game I'm trying my best to avoid them. But there is bunch of data (configuration or game state information) that different parts of my ...
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2answers
2k views

Manage VBO/VAO in a graphic engine

I'm trying to make a 2D Graphic engine for training me. I've actually made it with immediate draw and I've made the renderer outside (so I can switch between OpenGL and DirectX). How can I manage ...
2
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1answer
152 views

How do I generate paylines and pay dots for a slot game?

I'm working on a HTML5 slot game and am completely stuck on the pay lines and the dots that produce the lines from 1 end to the other. What's the logic behind generating a random number of dots ...
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4answers
3k views

Game architecture / design question - building an efficient engine while avoiding global instances (C++ game)

I had a question about game architecture: What is the best way to have different components communicate with each other? I do really apologize if this question has already been asked a million times, ...
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1answer
72 views

Resynchronize game state on reconnect

Suppose in a multiplayer first person shooter game that a player loses their connection. On reconnect they need to synchronize with the current game state. But while they are getting a snapshot of the ...
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2answers
2k views

Component based game engine and dependencies - singletons [closed]

I am thinking about how to create component based game engine. I understand that all things should be very similar as in Data Oriented Design (each object is a collection of various structures as ...
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1answer
283 views

Making up everything from single pixels

I recently saw a game which looked a bit like minecraft, but it was a RPG. The enemies in this game consist completely of voxels and if they die, they collaps and every single voxels falls down, ...