Questions tagged [game-loop]

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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86 views

Need help with an 'Exception thrown:write access violation:this was nullptr' in a c++ - SFML project

I'm currently learning how to program a 2d game with SFML using a tutorial series by Suraj Sharma.This's his channel: https://www.youtube.com/channel/UC2i39AOpDSlO1Mrn1jQ8Xkg The tutorial series: ...
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How to repeat scene in Unity 3D?

When my game ends I want it to automatically restart from the beginning so that the whole scene repeats itself. How do I do that in Unity 3D? Please refer this link for clarification.
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How to structure tic tac toe game loop (or equivalent simple turn based game)?

I'm developing the simple Tic Tac Toe game in Java and got stuck on the game loop architecture. The game must support local, remote and automatic players. The graphical interface is based on JavaFX. ...
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Moving an Enemy Toward the Player but only in cardinal+diagonal directions

I am working on a "quick project" to get my feet wet and to put something finished in my projects. I want to make an enemy that constantly tries to be aligned with the player object, but doesn't ...
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2answers
137 views

C++ Object management/deletion

I am working on a game with a lot of bullets, currently every second it loops through a vector of bullet objects and checks if its marked for erasure or not. ...
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34 views

Game server simulation loop updates to fast even if the fixed steps are implemented

Today I wanted to ask you about the server world simulation loop that I have implemented and it acts weird. I am using Java, LibGDX and KryoNet to create 2d rpg co-op game based on server-clients ...
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1answer
31 views

How can I make my animation switch frames automatically without pressing any keys?

So I have been trying to figure out for so long how I can loop the frames on my animation automatically without entering user input to prompt movement of my object. I have four different frames for a ...
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123 views

Jittery / stuttering motion when using SDL2

I've been using C++ and SDL2, but can't seem to get smooth motion when I have objects moving in the window. I was originally using SDL_GetTicks() and SDL_Delay() in my game loop, but one of the posts ...
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138 views

Implementing a main loop with rendering in a Windows Desktop Application

I'm writing the beginnings of a small game engine in Visual C++. What I have so far doesn't seem to be updating the rendering each frame, but I don't understand where I'm going wrong with it. The ...
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2answers
107 views

How to handle player input with fixed rate variable fps time step?

I've made a system which uses the ideas from "Fix your Time Step" in order update physics. I'm having trouble finding standard methods for dealing with this when user input affects player movement ...
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1answer
136 views

How does a game like Minecraft handle block and entity updates?

I am not asking how Minecraft loads chunks or generates chunks, I am asking about individual blocks and entities and their behaviours. Suppose you have a dirt block: dirt block can be converted to a ...
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1answer
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Game loop inside libGDX game loop

I have the main game loop in libGDX. On the touch() event I want an animation to be executed. So I will have a variable which will store the value which will be ...
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2answers
67 views

Exchanging data between custom-built hardware and games

I have a built my own steering wheel and motion platform that I would like to connect to popular car racing games (e.g. iRacing, Dirt Rally). I need to read data such as the car's acceleration (to ...
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1answer
172 views

Fixed Timestep with Interpolation | Blurry & Choppy

I've been implementing a game loop with a fixed timestep which uses interpolation as described in the (legendary as I have come to find out as it is referenced in almost every post I have read trying ...
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1answer
67 views

Is it always necessary to synchronize rendering in a game loop?

When writing a game loop from scratch in java for an android game applications, it is very common in many tutorials I have read that the keyword synchronized is used to synchronize update and ...
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Stuck at Goomba's speed and cancelling animation at game over

I'll try to be as precise as possible. First Issue: If you look in the code, I have a drawObjects function which calls collisionDetection function. Inside collisionDetection if player(mario) touches ...
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1answer
78 views

Web based poker on Phaser 3

Please can somebody help me as I'm a lil bit new to game dev and user interface designing. I am trying to create a simple Texas holdem poker using phaser3 for multiplayer application. I have a few ...
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How Best to Implement Fixed Time Step for Gsync/Freesync Monitors?

I currently implement my game loop using a variable fixed timestep, i.e. dt = 1 / monitor_refresh_rate with vsync (or pseudo vysnc with delays where vsync is ...
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1answer
65 views

Pause updating but keep rendering

I am creating an implementation of Snakes and ladders and I run into some issues.The game is updating too fast and I want to limit the framerate kinda,or make a pause so that the move is actually ...
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1answer
134 views

JavaFX AnimationTimer VS Swing Game Loop

After looking at some code sources out there I noticed Java Swing Games usually create a class implementing Runnable, create a new Thread and set up the game loop ...
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2answers
75 views

How can I fix my velocity damping to work with any delta/frame time?

I am decreasing my velocity by 50% every second using a guide I found online. I am using the code here and it gives the right result but only for very small values for dt: ...
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1answer
59 views

How to update model transform of components when using physics?

I implemented a high level components system for my renderer and am curious about the right way to update the transforms components of models that have a physics rigidbody attached. I am using ...
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2answers
92 views

When to stop taking items from ever-growing queue and start processing them?

I am developing a fast-paced multiplayer shooting game and following instructions from this source http://www.gabrielgambetta.com/entity-interpolation.html. In the article it says that: several ...
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2answers
129 views

C++ create array of multiple types

I tried to create an array Entity[] with elements Human and Zomby. ...
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1answer
56 views

Make a variable go down as another goes up?

I am making a JavaScript game called "Spoop: The Clicker", and I have a variable shown by text: ...
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170 views

writing a game loop for a networked multiplayer game

i am trying to implement a networked multiplaye game. i understand the game loop described here : ...
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2answers
199 views

How can I benefit when I don't use gpu?

I am trying to make a 3D game with C++, SDL, and OpenGL. My program roughly looks like this: control function has only CPU operations. draw function has CPU and OpenGL functions operations. I just ...
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1answer
98 views

Instantiate prefabs at particular vectors using text file (Unity3D game)

I need to read a text file containing two pieces of information on each line, and use that information to instantiate a prefab at the correct location in a Unity3D game (c# script). The locations are ...
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Is creating a separate thread for each game session a bad idea?

I'm currently working on iocp game server. My game is just like diablo3 basically. 1~4 players join a separate session. I did basic iocp preparations and now I'm working on game session class. The ...
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Render and Update in Robotlegs Like Archtecture

I'm developing a small Snake game using a custom engine and trying to apply Robotlegs-like MVC-S architecture with Commands, Events as well. Currently I put some commands for collision checks, bounds ...
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How can I solve the jerky images when camera positions were calculated and sent from another computer?

I'm working on a simulator project. Computer A which uses a stick as a controller to produce operation data and calculate simulate data which will be sent to computer B as camera positions to render ...
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1answer
43 views

Canvas Infinite Map: How to have reappearing objects at static X,Y even when looping

I made a html canvas example of an infinite scrolling map with objects in static places. As you can see in the Fiddle below, when you move left with the Arrow Keys, you can see that the map does not ...
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1answer
66 views

NodeJS client gameloop running slightly faster than server gameloop

So I'm working on a real time multiplayer game in NodeJs (Client and Server). Both loops handle the same "physics" (movement at a constant rate) and both are running at 40hz or 40 times per second. I ...
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1answer
241 views

SDL2 mouse motion event keeps occuring

The code I'm using is like so: ...
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1answer
228 views

Use vsync event instead of a 16ms timer?

I found that in game development, most people set a timer that gets triggered every 16ms to do the rendering. As an Android programmer, I'm familiar with the Choreographer. You set a callback that ...
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1answer
89 views

Time loop/ticking architecture

Say I build a snooker game, where balls need to jitter around. Balls belong to a class (ball class), where all the ball functions are defined. In the animation, time evolves by a clock ticking ...
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2answers
139 views

While loop running in thread, but not doing anything [C++]

I am trying to multi-thread my game so that one thread updates and renders the player, while the other listens for inputs. I used a while loop to keep my detached thread running in the background, ...
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1answer
162 views

My Java Game's movement looks awfull. Maybe Problem with Thread.sleep

I have a big problem with my Java games. In every game I make the movement of the player and objects just looks awfull. The framerate is 60 fps without any problems. But the movement looks extremly ...
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1answer
229 views

MonoGame tick cannot go lower than 16ms

I'm trying to build play with MonoGame and I'm trying basing this regarding the GameTime steps. In my main Game class that is being run in the main entrypoint of my project, I'm doing something like ...
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1answer
63 views

How can I speed up the shapes drawing on high-density devices?

I have a game that should draw many shapes on the canvas and in every frame these shapes position will change, the game is running smooth but after adding more shapes some jerk arise and it drops some ...
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1answer
631 views

Render Stutter - OpenGL or loop timing?

For some time now i have no been able to pinpoint the nature of the rendering stutter shown above(by not clearing the screen, not using SwapBuffers and drawing only to the front buffer). See the big ...
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1answer
202 views

Use two Gameloops instead of one

I have been thinking about this a lot and don't know if i'm thinking incorrectly. Most games have one game loop that can be split into three functions. A basic game loop would look something like ...
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Making games on Structure programming language c or c++ [closed]

I am learning structured programming language C. I know about data type, control statements, loops, arrays, strings, functions, pointers, structures and STL. My question is, if I want to make game ...
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191 views

Time based events separate from the game loop

How can set up time elapsed based events separate from the game loop? I want the character to heal over real time rather than per cycle of the game loop. How might i do that?
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1answer
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How to sleep for the desired duration between game loop iterations?

My game loop below doesn't sleep as log as it should. The delta value always ends up less than 1, when it's supposed to be 16.6666 or close to 16.6666 ...
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1answer
2k views

Java Game Loop Efficiency

I'm quite new to java. I was watching 2 video tutorials on how to make java game and read a couple articles about game loop. However, I'm still confused about how game loop actually works. The ...
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1answer
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Game object appears to accelerate too slowly

thank you for checking out my issue! I am trying to develop a game in java, but I have run into a problem. I would like to keep the physics as realistic as possible, so I am using a fixed time-step ...
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2answers
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Which of these two codes are 'better'? Making a local variable or a class variable?

Im making more games and asking more stupid questions. Hopefully this one is very brief. I'm making a very basic class which just moves a Player object by applying force to a rigidbody, but it got me ...
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1answer
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How do I deal with closely coupled systems in a game engine?

Let's say a game engine had a central game class as well as multiple systems (as objects) that are stored within it. These systems (such as input, rendering, sound, etc) would also be updated by this ...
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How to set up a key press to start the game

I've tried to create a simple start menu for my game which informs the player to press a key to start the game but the problem is that it works only if the key is pressed all the time...i'm not sure ...