Questions tagged [c++]
C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language.
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Structuring in-game menus
I'm working on a multiplayer RPG using only C++ and SDL2. I've already made the main menu and a map editor, and I'm preparing to make the actual game. The main menu and map editor were easy to ...
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Directx 12 : Synchronisation between two processes
i have created two application.
One application is rendering a texture off-screen with unlimited frame rate present option.
The second application is reading what APP1 is rendering from graphic ...
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UE4 Multiplayer how to replicate Player name in lobby
I've been working on a little 1V1 snipper project to try and get a better grip on the replication and the game framework of unreal engine.
So after the core gameplay, I'm trying to make a lobby ...
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1answer
34 views
Rotate Sprite towards mouse cursor SDL
I have trouble to make my sprite(Arrow) to point at the position of my mouse cursor but i don't get the Right results. I've tried this:
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1answer
58 views
VAO not showing
My VAO is simply not showing up and i'm not sure if my matrices are wrong or if the shader is wrong…
Please have a look a see what is wrong… My code is big so i'll post the essential.
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1answer
85 views
Programming Test for a job in Game Dev - expected levels of documentation etc
If this is the wrong place to be asking this - please let me know and I'll happily ask it somewhere else!
I am completing a C++ Proficiency test for a "Junior Engine Programmer" role at a game studio ...
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29 views
Godot native c++
I want to add java native interface cpp to be compiled to .so files in the apk in godot android export.
Basically add android native jni c++ to godot.
My first gamedev stackexchange question.
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28 views
Execute Timer Events of another Blueprint from the C++ UE4
I am having problem and it's about a week now that I still can't figure out how to get it right.
It seems that I can't run any functions from the blueprints that contain timers at all.
I have a ...
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1answer
36 views
Making a box character in UE4, not a capsule
I want to make a character for a Breakout game that is a kind of cube.
From the instructions from Unreal it appears I need to create a 'Character' blueprint. But when i do this, it comes with ...
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61 views
What Type Does One Cast the Result of “get_function_address” to in Order to Call the Function Within a C++ DLL?
According to the game maker documentation for dll manipulation:
get_function_address('function_name')
Returns the address of a GameMaker function. This can be passed to
DLL's so the can call ...
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1answer
32 views
How to set root signatures specified in HLSL in my command list?
From Microsoft Docs, I can specify the root signature of my shader in HLSL. How do I use it though?
Since at the beginning of the command list, root signature is undefined. I need to use ...
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42 views
2D Spatial Hashing in C++ Causing Game to run more Slowly
I'm trying to use spatial hashing to speed up collision detection in my game. I believe spatial hashing is better suited for my game than quadtrees, because I have lots of fast-moving objects in my ...
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1answer
95 views
Game Either Runs Poorly or at Different Speeds
I'm making a simple 2D shooter game using C++ and SDL2. For my main game loop, I used the code from the famous Fix Your Timestep article. The problem is that, because I'm using a fixed delta time, the ...
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1answer
107 views
How can I draw filled triangles in C++?
VERY IMPORTANT NOTE: Im trying to fill a triangle. I have already made the 3D part. Sorry if this wasn't understandable.
I'm currently trying to create a simple 3D-Engine. Well, I have successfully ...
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1answer
34 views
Accessing the Properties of an object already in Scene in Unreal Engine using C++
I am trying to learn more about raycasting in C++ and am trying to implement raycasts in a mini third-person game I am creating. In order to shoot a raycast, I first need to determine its starting ...
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1answer
24 views
Why do I get syntax error: identifier FHttpRequestPtr
I'm trying to add HTTP requests to my game and everything compiles fine until I try to set up a delegate for when the response is ready. Adding this function causes the compiler to fail for syntax ...
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40 views
How do I bind a bone vector to a glBuffer?
I want to shred the bone with the vector of weight. However, running the c++ and the GLSL code below, I get an error: glBufferData import problem vertex shader :S
How should ...
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1answer
88 views
Game states and events
I'm writting a game in C++ and I'm struggling with getting events and game states work together.
By game states I mean something like this
...
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1answer
76 views
How do I render a word in the middle of the screen using FreeType and OpenGL?
I'm following this tutorial series on making a simple 2D clone of the classic Breakout game, but its author doesn't mention how to render a whole word or sentence in the middle of the screen. He ...
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1answer
36 views
Unable to create OpenGL window in SDL2
I am currently working on a C++ + SDL2 game engine and I am stuck on a problem. The problem is that whenever I pass SDL_WINDOW_OPENGL to ...
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44 views
Can I use plain old C++ objects and smart pointers in UE4?
I'm a big fan of reusable code and want to make use of code that I integrate into UE4 projects outside of the engine as well. I am new to UE4 dev, so this is my first attempt of weaving the UObject ...
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45 views
Why does not checking for something before using it *sometimes* crashes the editor with an unhandled expection?
This has happened a couple of time and I just want to understand what's going on.
Most of the times I can use GetController() without any problems, but sometimes I need to check for it first, ...
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52 views
How can I apply my camera to all graphics objects?
Is there a way to have the camera be applied to all objects?
Can you have the camera effect objects that where made with glVertex3f();
This is the fourth time I ...
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2answers
67 views
Adding a map without recompiling
I am creating a maze game in c++. I have a class that is used to create the walls with positioning and collision. I want the user to have the capability to include the header files needed for making ...
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1answer
34 views
C++ property is none when accessed in bp
I have a class in C++ that I want to access in BP. It appears to be fine in C++ but in BP I get Accessed None errors when I try to use it in BP. Here is the class declaration that I am trying to use ...
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104 views
What is the proper way of handling resolution and size units on a 2D game?
So I started to learn SDL2 and I want to make a simple 2D game.
Now when I render a texture I have to specify in pixels the size of the element I want to draw and also the position in pixels on the ...
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2answers
69 views
Assertion b2Assert(m_bodyCount > 0) showing an error
I have the following code for deleting a Box2D body:
...
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1answer
71 views
Why is my map not drawing properly?
My code compiles fine but for some reason, I get this white background in my window. what am I doing wrong?
I want to draw my map (sorry, there is a lot of code).
Here is my debugged window image:
...
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1answer
38 views
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13 views
How to get normals in the FBX SDK?
I'm working with FBX SDK and I'm trying to get normals of my model but I have no idea of how to do it and I dind't find anything on Google.
I am using C++.
I hope you'll be able to help me !
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1answer
109 views
Tilemap collision in Pure ECS?
I'm currently making a 2D topdown dungeon crawler using pure ECS and Data Oriented Design. So I only use structs of arrays for all my components. I have now added tilemap generation, but was wondering ...
2
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1answer
126 views
'Destroyed Actors' and 'Save Games'
Background
Our team is creating an adventure platformer, and I have been tasked with creating a Save Game system.
Our game features the usual progression systems, and is relatively linear.
Approach
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1answer
70 views
2D Topdown Shooter - Line of sight based purely on angle and rotation
In a game I'm working on, enemies constantly rotate around as they move around the map. I want them to only shoot the player if they're within a field of view.
This is the function header:
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3
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1answer
192 views
C++ Wrapper class for raw pointer to an SDL_Texture
First time in game dev, so go easy on me. I understand it's senseless to copy textures, but I'm trying to see this from a copy/move perspective since there is a lot of that going on in my code and in ...
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2answers
51 views
Problem with rendering a quad from four lines
I am having a problem with rendering a quad in opengl via 4 lines (5 vertices via GL_LINE_STRIP). The rendering is generally working fine in terms of connecting the lines into a quad. The problem is, ...
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21 views
Libnoise bounding box - from spherical to planar
I'm trying to convert a bounding box inside a spherical map (equirectangular image as a result of Libnoise/c++) into a planar projection, but I can't find the correct algorithm for it and I'm not good ...
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28 views
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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2answers
65 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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1answer
59 views
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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1answer
104 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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49 views
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
54 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 ...
2
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0answers
102 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
50 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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1answer
44 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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4
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1answer
326 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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2answers
94 views
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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1answer
85 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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35 views
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....
