The central code loop responsible for handling the running gameplay. At its most basic state, it accepts input, resolves the actions of entities, and renders the scene.

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0
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2answers
151 views

declaring variables in a render/game loop: good idea or bad?

I was just wondering how most of you like to declare your variables: for a variable you know will be used and changed frequently (i.e. every frame), do you declare those outside of the loop and simply ...
4
votes
3answers
934 views

Game loop on windows

I have seen different "basic" game loops both from books like "Introduction to 3D game programming with DX11" or online tutorial ( Rastertek ) and if we take off all the fancy stuff to control ...
2
votes
1answer
164 views

Implementing a time scale in game with fixed physics update

I'm currently putting together my game loop based on the "Fix Your Timestep" article at gafferongames.com. This is going fine, but I'm also trying to implement a 'time scale', i.e. a way to control ...
0
votes
2answers
240 views

Effort of impementing interpolation in networked Asteroids

Questions: When we draw with interpolation, where should the collision detection code be? Is it worth implementing interpolation in the following situation? This is for Scrolling Asteroids. I have my ...
1
vote
1answer
220 views

How should I invoke a physics engine?

I'm new to writing games. I'm planning to write a 2D battle game which may require an physics engine. Suppose I've written one, but how can I combine it with the main routine of my game? Should I ...
0
votes
2answers
366 views

Why does this game loop stop my process from responding?

I implemented a fixed time step loop for my C# game. All it does at the moment is make a square bounce around the screen. The problem I'm having is that when I execute the program, I can't close it ...
1
vote
0answers
430 views

How to implement the server-side game loop?

The server needs to handle the physics, because all the movement will be handled by it. So for that I need a game loop. The thing is that the server doesn't have the render part, it's just a console. ...
0
votes
1answer
91 views

either use a for loop or iterator for the List of sprites for loop Optimization in libgdx

I am making and there I am making a frequent use of java.util.ArrayList for enemies, coins and shots. Is there any other utility in libgdx better than this from the Performance point of view. ...
7
votes
2answers
1k views

Java 2D game programming: Different approaches to make a game loop

I am new to Java game programming, but the more I read the more I'm confused, because I've seen several different approaches to make a game loop: 1. The standard approach, that uses the Timer class ...
0
votes
2answers
413 views

Android Loop : Draw Loop : How to pull off smooth FPS?

I am writing 2D side scrolling bullet hell-like game. I am at a point where I struggle to pull off smooth fps. I have separated loop that manages drawing. However I want update the position of ...
0
votes
2answers
151 views

Serious gameplay issue by spawning enemies according to elapsed time

EDIT: I have changed the title as I think that this is a general gamedevelopment question but, on a technical note, I am using Cocos2d v2.0 Some time ago I had asked a question on which was the most ...
1
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1answer
110 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 ...
1
vote
2answers
174 views

Game loop delta, factoring execution time?

Was thinking this morning, I 99.9% of the time, only see a main game loop, looking like this, just as much so where the delta is passed into update(): while running getDeltaTime() ... f(deltatime) ...
-2
votes
1answer
201 views

How to add difficulty levels to a Guess The Number game using rand()? [closed]

User guesses a random number (between 1 and 100 or 5000 and 25,000 depending on difficulty) that the computer picks. User selects difficulty from list, difficulty (1, 2, 3, 4) is assigned to int ...
0
votes
0answers
76 views

Time on touch events?

Whats the best way to have a touch even cause an action for a specific period of time or deltaTime? It seems like it should be simple, but I have tried while and for loops based on int counts for ...
0
votes
1answer
110 views

Removing drawn Allegro texts and primitives

I'm working on a game with Allegro 5 that has a loop. I'd like to make the program write onto the screen, how much time the loop has ended. These are the rounds of a turn-based game, obviously. I use ...
1
vote
0answers
83 views

Accessing variables from non-neighbouring classes specifically in game development (Android) [closed]

Edit Using direct access while breaking the law of demeter looks like this: res.sprite.drawQuad(res.sprite.xScreen,res.sprite.yScreen, mMVPMatrix); Using proxy methods / getters / setter looks ...
6
votes
1answer
574 views

Android game loop's effect on cpu/battery usage - unexpected results

I will try to keep this question as concise and as readable as I can. I recently came across an odd problem with my Android game that I'm developing. It's an openGL ES 2.0 game and initially I was ...
-1
votes
1answer
162 views

Get distance between the edge of screen and a moving sprite

How to get the distance between the edge of the screen and a vector moving sprite? I want to get the distance between my moving sprite and the edge of the screen so that when my sprite touches the ...
0
votes
6answers
855 views

Avoiding constant IF checks for loops

As an example, I have 3 different loops that are executed in certain conditions. I want to know if there's any way short of something like this: if(day) x++; else if(night) y++; else z++; ...
2
votes
2answers
537 views

Why are my game ticks longer than expected?

I was working on my game, adding stuff to it, when I noticed my ticks were in the low 50's when I had set it to do a constant 60. This is my run method. public void run() { init(); long ...
2
votes
2answers
235 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), ...
0
votes
0answers
574 views

Android OpenGL ES 2.0 gameloop problems

I implemented a gameloop found here: http://www.koonsolo.com/news/dewitters-gameloop/ into my OpenGL ES 2.0 Android game. The tutorial was written with the canvas API in mind, not OpenGL so I made a ...
-2
votes
1answer
79 views

how to restart in java japplet? [closed]

how to restart a game? problem with my code is that when it restarts it double the enemy. so there are 10 enemies and lets say player dies than user restart and now there are 20 enemies and so on..... ...
1
vote
1answer
285 views

Gamemaker Loop Question

How often do loops repeat in game maker? Is it every step, or as fast as it can handle? I need it to loop every step, is it possible to do that? I'm talking about in code, I have a do until loop. Just ...
2
votes
2answers
298 views

Lockstep Game Loop

I have an XNA game using a basic lockstep update loop. The client sends all commands to the server, and updates only if it has received the next turn's commands from the server. When does a turn end? ...
7
votes
4answers
575 views

Simultaneous game states

I think I understand the basic idea behind a Finite State Machine-based game loop. But I'm trying to write a little game in which the same object can simultaneously be in multiple, independent states. ...
-1
votes
1answer
121 views

simple win32 window wont show [closed]

The program compiles and runs successfully but does not show a window, it simply ends immediately. #include <Windows.h> LRESULT CALLBACK WndProc( HWND hwnd, UINT message, WPARAM wParam, ...
3
votes
2answers
200 views

Behavior Tree Iteration Rate

How is a Behavior Tree iterated in a game? For example, let's assume you have an extremely large Behavior Tree with about a hundred Actions/Conditions. If we were to run one action or condition ...
1
vote
3answers
400 views

Whats an elegant implementation for 2D collision detection in a block based game?

to make things clear, i do not want to know HOW to implement collision detection mathematically. What i am looking for is an elegant way to check for collisions without having to manage seperate lists ...
4
votes
1answer
2k views

The most efficient and accurate game loop?

Obviously for a game to work you need a game loop... Normally, my game loop would consist of something like this: while(running){ update(); render(); Thread.sleep(10); } This seemed to ...
-6
votes
1answer
160 views

Generic Class Name for RTS [closed]

Hopefully this will be a nice easy question :- I am building an RTS as a way of learning OOP techniques. Currently the code has the following classes Class MustInherit GameUnit Class MustInherit ...
11
votes
1answer
492 views

Behavior Trees :: Actions That Take Longer Than One Tick

From what I understand on Behavior Trees, each Behavior should be a short goal oriented Action that could be done in a few iterations. So for example, below is an image of a Behavior Tree: Now let ...
1
vote
1answer
738 views

CPU usage, game loop and sleep()

I've read about this topic on numerous discussion sites, but I can't seem to find a clear definitive (up-to-date) answer, and hopefully this will me some more insight: I've read the excellent game ...
-1
votes
1answer
173 views

Server fixed timestep not running at 30Hz but way way too fast [closed]

I'm trying to make my game's server thread run at a fixed 30Hz but can't figure out how. Basically, before I just had a stupid while(1) { //do everything as fast as you can} which means that for my ...
3
votes
1answer
430 views

Weird stuttering with fixed-timestep, variable-framerate game loop

I've been trying to set up fixed-timestep loop for my game, using the technique from here. I have no need for the interpolation step as I intend to run the logic at or above vsync speed. Here is a ...
-1
votes
1answer
177 views

Drawing multiple sprites with clear screen for every frame

I googled with best of my skills, but I cannot find any relevant answer to my problem. I'm making a game with an isometric view. I need to draw multiple sprites on the screen and before switching to ...
2
votes
1answer
163 views

Selecting the entities needed for rendering [duplicate]

Currently I'm sorting and looping every entity on my level but I really don't need to. Only a small subset would be on screen. If I could extract a list of entities from my main list that are on ...
2
votes
1answer
283 views

Synchronizing input, update and rendering threads

How do you synchronise the input-handling, state-updating and rendering threads? If a sprite position is modified due to input, the wrong position of the sprite might be drawn to the screen if the ...
10
votes
3answers
1k views

EXTREMELY Confused Over “Constant Game Speed Maximum FPS” Game Loop

I recently read this article on Game Loops: http://www.koonsolo.com/news/dewitters-gameloop/ And the recommended last implementation is confusing me deeply. I don't understand how it works, and it ...
3
votes
3answers
338 views

How precise should timers in update loops be?

What is the suggestion of "enough precision" in a timer for a fixed game update loop? Currently I'm testing with this code, but it sometimes misses 1-2 updates @ 50hz. While at 30hz it seems to work ...
2
votes
2answers
354 views

How do I calculate consistent frame timings at 60fps?

I'm writing an HTML canvas game that uses requestAnimationFrame and therefore runs at 60fps, although this is more of a question about failing arithmetic than about JavaScript. If I measure the time ...
4
votes
4answers
17k views

Android game scrolling background

I'm just trying to figure out the best approach for running a scolling background on an android device. The method I have so far.... its pretty laggy. I use threads, which I believe is not the best ...
4
votes
1answer
357 views

Online card games: game loop or event based?

The only games I've made have been the game loop variety. I'm just starting to think about building an online poker game where people could meet up in a lobby, etc. Cards seem event based... is the ...
4
votes
4answers
981 views

Creating the concept of Time

So I've reached the point in my exploration of gaming where I'd like to impliment the concept of time into my little demo I've been building. What are some common methodologies for creating the ...
1
vote
2answers
262 views

Multiple pipelined game loops

I am considering using the following game engine design pattern, but I am unsure if it's a good idea or not: Each major task (drawing, physics, logic, networking, disk I/O) will have its own ...
1
vote
1answer
619 views

XNA - moving the 3rd person camera

I'm having following problem: Can't set my camera to follow object from behind and rotate when I use left/right arrow. I've tried different tutorial and examples but it still doesn't work for me. ...
13
votes
2answers
1k views

Design of a turn-based game where actions have side-effects

I am writing a computer version of the game Dominion. It is a turn-based card game where action cards, treasure cards, and victory point cards are accumulated into a player's personal deck. I have the ...
1
vote
1answer
526 views

SDL2 focus lost = massive gain in FPS

Whenever I lose focus from my game window, I go from ~60FPS to 6000+, then when the window gains focus again, I go back to around 60 frames per second. And yes, this happens every time I run my game, ...
13
votes
3answers
788 views

Game loop, how to check for conditions once, do something, then not do it again

For example, I have a Game class and it keeps an int that tracks the player's lives. I have a conditional if ( mLives < 1 ) { // Do some work. } However this condition keeps firing and the ...