Game Development

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C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language.

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what exactly is the logic behind 6502 and precise clock cycle emulation?

Key questions to consider based on page 10 of this document: http://archive.6502.org/datasheets/rockwell_r650x_r651x.pdf What does page 10 imply by "Add 1 to N if page boundary is crossed"? What ...
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How to store UI data?

I'm building a platformer using SFML and C++. Right now, I'm storing all data (texture info, sprite info, level data, audio info) in JSON files, which are then dynamically loaded and unloaded. However,...
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28 views

UE4 Code Project is not showing sub folders created within C++ Classes Folder even though they exist

These were my steps. Created an empty code project in UDK4. The editor starts up. On the left bottom you have: If you try to right click on C++ Classes, Or select [Add New] while having C++ Classes ...
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C++:Segmentation fault (core dumped) while creating gameobject

i made a small code to debug and i get this error player inherit from gameobject code ...
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59 views

Draw a Diagonal Lines in the image by using c/c++

I have an image and wants to draw multiple diagonal lines in the image. if we look into main program it takes input bmp file and generates one pattern. what I need to insert diagonal lines in that ...
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82 views

The A * algorithm in the map has many moving objects

I am using the A * algorithm for my game, it is a kind of Isometric map with lots of tiles. If all the game objects are trees, rocks, houses and only one game object is a moving hero, the A * ...
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Cyclone LED gaming code HOW TO HELP?

I am very new to programming. For a project I decided to make a game of cyclone using some LEDs,a push button, and a raspberry pi. I researched how to at least start on the game, but the problem that ...
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1answer
45 views

C++: passing gameobject as a parameter and then into vector

firstly iam used to java and new to c++ so maybe this will looks a noob's question i will explain this and give a pseudo code and then c++ just so you can understand me i have a player class which ...
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77 views

Structure for a strategy game

I am making a strategy game like Age of Empires. It's a pretty big project and I need a clear game structure. I have defined a Game_Object class with variables ...
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1answer
39 views

Could not load PNG in SDL2?

I have three image files, one is Techs.png, one is Techs.gif and one is Techs.bmp. I have used SDL_image 2.0.5 and SDL 2. When I load the image of Techs.gif and Techs.bmp, there is no error, but when ...
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37 views

Update TTF Texture for Score

I have a little problem with Updating my Score with TTF. Im a neewbie so dont blame me :P I Try to Update my Score But the Buffer Get too small after a while and my Game Crashes. ...
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285 views

What Situations is Saving a Game to Main Memory for?

I've been reading through Unreal's 'Saving and Loading' guide: Link Within, they present a capability to save a game to main memory rather than secondary storage: I haven't found any information on ...
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asteroids bullet hits the enemy ship

I am making an asteroids like game with 2 space ships. Well I have drawn 2 ships on the screen. Each ship can move and fire bullets at the enemy ship. I am using the sin and cos functions to make the ...
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Loading the map from an image file in C++

For my platformer tile-based game I want to be able to load the game map from an image file. Consider the following 25x15 px .png (enlarged) representing some level: Assume that each specified ...
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53 views

SIMD and Inverse Tangent

I'm calculating spherical UV coordinates in a loop, trying to get GCC to vectorize the code. Here's a compile-able example of what it looks like. ...
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Bullet Physics stops detecting collision after a few steps

Let me start off by saying that the usage of Bullet here is slightly unconventional. I'm writing a server emulator for a game, and the server is only keeping track of the triggers, players and enemies....
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How to static link modules using static variable constructor?

I'm trying to make my game engine supports both static and shared linked modules. Basically I have a CREATE_MODULE macro that have 2 implementations. This is based on Unreal's method. ...
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1answer
50 views

Unreal C++ Detecting new Key Down during current Key Hold

I am currently working on a combat system and I wanted to be able to have key combos to execute combat moves and such, and I am detecting key input type as well for example, if the key is tapped, or ...
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Explicitly Loading a Ogre3D DLL wrapper with OgreMainStatic.lib linked crashes when loading a mesh with CreateEntity

I have a Ogre3D 1.7.x DLL wrapper project that explicitly loads Ogre functions and works ok using the OgreMain.dll + D3D9 Renderer plugin.dll which loads a mesh without any problems. This is my setup: ...
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Trying to Rotate terrain

I'm new to OpenGL and don't really know how to rotate a terrain. For my graphics class, I have a project I need to do that is making a tire using OpenGL and work that we done in class (my framework is ...
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Need help with a 'Read access violation' exception in an SFML/C++ project:

I'm recently learning to make a 2d game in SFML using a tutorial series on youtube by Suraj Sharma(Video 57): https://www.youtube.com/watch?v=kwd_AVCkvXE&list=PL6xSOsbVA1ebkU66okpi-KViAO8_9DJKg&...
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1answer
51 views

C++ SDL2:2D tilemap with every tile has its own behavior

I am working on 2D tile based game. I want to render the tilemap from a file but every tile has its own behavior for example: magmablock : poorlava(); slimeblock : knockback(); I have this ...
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1answer
35 views

Recalculating normals on a tesselated cubed sphere with heightmap applied

I'm learning about the graphics pipeline using C++, HLSL and DirectX 11 for my course. I'm currently tesselating a cubed sphere with an applied height map. My issue is figuring out how to recalculate ...
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1answer
39 views

how do i call variables inside headers from cpp?

i'm making a game right now so i want to make a main menu, so i made a header that will contain all the variables, like images, settings and, other things. (i will only talk about the images) the ...
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1answer
62 views

Four (4) color channel png has black “background”

I am experimenting with C++ code to load a png file, using libpng. When I get to the color data in the file, I load it into a std::vector. I have found that the ...
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1answer
35 views

How to use TEnumAsByte Unreal 4.22

The problem I am attempting to use a TEnumAsByte in one of my class headers: I get compilation errors: Code sample I have included everything relevant to the ...
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1answer
72 views

How to pass renderer through classes?

I am making a game with SDL and C++. I am trying to render simple image to the screen but I can't. I am not getting any error but I see only black screen. I think because the renderer in ...
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2answers
134 views

Parsing “pick up” action in a text-based RPG

I’m coding a text-based RPG and I have my controls working: I have a string checking what you write in against an array of if statements. It can get it right with ...
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58 views

Can't load textures to the game

I am making a game with SDL and C++. I am trying to render simple image to the screen but I can't. I don't know why, I am not getting any ERROR but I see only black screen. Here is my code: game.h <...
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1answer
48 views

OpenGL object load in reverse

I am trying to load a model and it is loading it in reverse. When I am trying to rotate it 180 degrees it changes the lightning as well. I am not sure what I need to do to change the position that eh ...
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1answer
26 views

UE4.23 - Cast of child of GameUserSettings fails

I've derived GameUserSettings to add a bunch of custom properties to it. I tried making accessible in blueprint by creating a static method that returns the current GameUserSettings cast to my Child ...
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How to use mip mapping with SpriteBatch in DirectXTK

For a C++ .dll project of ours, I am able to render different sprites from a spritesheet into a texture using DirectXTKs SpriteBatch() method. But then, we came to notice that the sprites start to ...
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2answers
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C++ inheriting functions problem

So I am creating a game with C++ and SDL. I have a "gameobject" header file and no cpp (I do not need it) the game object has 2 functions void render() & ...
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Grappling hook force resolution

Our team is creating a 3rd person adventure platformer in Unreal 4.22. One of the mechanics is a grappling hook. Think less-so a 'pull-to-point' grappling hook (Widowmaker, Just cause etc.). However ...
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1answer
92 views

Identify an object currently selected in the game

I am making a 2D isometric game that uses the mouse. When I left click on an object, this object should be selected, but how do I determine what object that's currently selected and show a halo around ...
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1answer
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Only one triangle drawn

I am trying to render a quad with gl render mode GL_TRIANGLES with using element array buffer. Here is some code to explain process. Only the first 3 elements of indices array are drawn as expected. ...
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2answers
55 views

Parts of 3D model disappear during animation

I'm trying to properly play an animation done in Blender 2.8 inside my OpenGL application. When the animation is running, it happens that at some particular frames, some parts of the 3D model "...
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1answer
50 views

Add impulse and torque to a cube

I would like to spawn a cube if I press space and apply a short impulse of force and torque to make the cube rotate. I have some calculations for the impulse but I think they are wrong since the cube ...
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1answer
74 views

How is tile offsetting accomplished in 2d side scrollers?

The idea is to work with tiles that together make up a larger image, or world so to speak. but im confused as to what the methods used are to offset the tiles, and whether is a good idea to draw ...
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28 views

Need help with a Lnk2019 error in an SFML/C++ project

I'm currently making a 2D video game using the SFML library on Visual Studio 2019 community with the help of a Youtube tutorial series by Suraj Sharma: https://www.youtube.com/watch?v=IdKZpv6xqdw&...
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25 views

Need help with sluggish sprite movement in an SFML-C++ project:

I've recently bought an SFML course on Udemy.The course is teaching me to make a game where you are chopping a tree while avoiding falling branches. Right now i'm learning to animate moving clouds ...
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D* lite optimized: what is wrong in my implementation of Search() function?

I'm trying to implement the D*-Lite pathfinding algorithm, as described in the 2002 article by Koenig and Likhachev for grid-based navgraph. But I stuck with problem. My ComputeShortestPath (in my ...
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1answer
129 views

Projection Matrix Causes Clip Cuttoff Problem

I'm trying to setup my renderer and I'm configuring the matrices. I currently have a View Matrix and a Projection Matrix which I then multiply and send to the shader(there's no need for model matrix ...
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1answer
145 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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Implement a scale factor to apply to UCharacterMovementComponent::JumpZVelocity in Unreal Engine 4

I'm creating a my own movement component inherited by UCharacterMovementComponent. I should implement a scale factor (I called it JumpZVelocityScale) to apply the JumpZVelocity (and I don't want ...
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1answer
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How do the PhysWalking and similar functions actually handle input?

As the title may suggest, I'm developing a CustomMovementComponent and I'm on the stage where I am developing my own PhysCustom ...
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1answer
72 views

In a MovementComponent, where should I initialize member variables?

I have a MovementComponent derived from CharacterMovementComponent MovementComponent, ...
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25 views

How to use a derivative of CharacterMovementComponent

I'm developing a 3rd person platformer. My Character class (the default third person template class): PlatformerCharacter : ACharacter My MovementComp class: <...
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33 views

Retrieving shader byte code using D3D11

I have a shader as an 'ID3D11VertexShader' (or generally any 'ID3D11*Shader') instance. For my application I would like to read the shader byte code that is associated with this instance. The goal is ...
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1answer
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Models /textures/music corrupted!

I'm making a 3d rpg game. Everything seems to work on other computer. But when I open my game in my computer, the polygons gets crazy everywhere filled with random polygons. Textures will get rainbow ...

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