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

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3
votes
2answers
5k views

How do I properly check if a particular OpenGL version is available?

I can't find any information on glCreateContextAttribsARB returning errors if a version is unsuported by the driver. So how do i check if it is? I don't want the program to hard crash because ...
0
votes
2answers
102 views

Quaternion Rotation Help

So I'm making a little engine with DirectX 11 and C++. (Some other help from other API's as well) DirectX has this function XMMatrixRotationQuaternion(XMVECTOR quaternion). I know nothing about this ...
-2
votes
1answer
148 views

GLSL- How to change a certain color of a sprite, to another color passed into the shader?

I have been googling for over an hour, trying to find out how to do something very simple, which I see in tons of games. I tried to understand GLSL, but it seems like a ton of learning for a single, ...
-2
votes
2answers
721 views

Making a game engine or using Unity3D? [closed]

I was wondering, which one would benefit me the most? I have as much time as I need to make a game engine and rapid development does not appeal to me. Unity3D is easy, but how much will mastering ...
1
vote
2answers
165 views

How can rotate a 2D textured quad in legacy OpenGL immediate mode?

I have a texture of a tank, and I want to it appearance on the screen depends on its current direction, so I decided to use rotating texture functions of OpenGL. I followed some advices through Google ...
-1
votes
2answers
145 views

What does a C++ expert need to know? [closed]

so the other day I was looking for jobs in the gaming industry (software engineer/game programmer/gameplay programmer, etc) just to get a look at what are some of the requirements. Most of these jobs ...
8
votes
3answers
356 views

Cache misses and usability in Entity Systems

Lately I have been researching and implementing an Entity System for my framework. I think I read most articles, reddits and questions about it that I could find, and so far I think I am grasping the ...
4
votes
0answers
88 views

Ogre PSSM Grass Receiving Shadows

So I made the switch to Ogre3D (v1.7) and using PagedGeometry. What I'm trying to do is make a simple scene with a terrain, some trees and grasses. In a nutshell, I would like to achieve this kind of ...
1
vote
2answers
534 views

Directx fbx loader

I am trying to build a game with animation in c++ with DirectX. I have some fbx files with animation that I want to integrate in my game. But I do not want to draw the fbx files as a FbxScene or ...
0
votes
1answer
97 views

OpenGL segfault in DrawElements

I've asked this question on regular StackOverflow but without much success yet. The below program produces a segfault on the call to glDrawElements. I've looked at my max and min index values and they ...
5
votes
1answer
3k views

Implementing a skybox with GLSL version 330

I am trying to get a skybox working with OpenGL 3.3 and GLSL version 330. I could not find a completely modern OGL skybox tutorial anywhere on the web, so I modernised an older one (using ...
0
votes
1answer
53 views

Diffuse Maps and DirectX

How would I load two diffuse maps onto one mesh. I have a mesh with multiple sub meshes but each one of those sub meshes has a vertex buffer and I don't think that's very efficient. How could I have ...
1
vote
1answer
112 views

How to handle game objects in DirectX

Coming from XNA, I would use the content pipeline and create XML files for game objects. However, if I changed something in the XML, I would need to do a rebuild of the project so it will create the ...
1
vote
2answers
94 views

Box2D `ApplyLinearImpulse` is not working whereas `SetLinearVelocity` works

I need to mimic jumping behavior for the player in my game. Player consists of two fixtures with circle and rectangle shapes. Rectangle I use to detect ground and it is a sensor. Is some point for ...
0
votes
1answer
53 views

How to move a body from one world to another?

I have a Box2D world for each level in my game. When a level is completed, I want the player to be removed from the completed level's world and added to the next level's world. How do I do this?
1
vote
0answers
108 views

OpenGL - Texture disappears

I'm making a simple program with C++, SDL and GLEW. So far it is going great but I ran into a weird problem. One of my four textures would not show up on screen even though it used the same code as ...
0
votes
4answers
236 views

Why use compression such as zlib? [closed]

Compression and encryption are different things AFAIK, so why even use compression if you have to still decompress anyway, is this just to reduce distribution size or is there some other reason?
0
votes
1answer
110 views

Ambient occlusion: Correct culling after anisotropy correction

I've added simple color based ambient occlusion to my game. First it looked like this (from giawa.com): The description: "Due to anisotropy, the ambient occlusion shading on the top left is ...
0
votes
1answer
78 views

Simple shader for sprite interface [closed]

I have been looking for any examples for a long time, I cant get anything to work (from the examples). I have tried using vertex/pixel shaders, effects files, but they never have any effect on the ...
1
vote
1answer
191 views

How to implement camera pan like in Maya?

I am trying to implement camera pan like the one in Maya. I've got it almost working. The problem is that the mouse cursor is moving faster than the 3d mesh (in fact I am moving the camera but I ...
0
votes
1answer
74 views

Algorithm for texture blending modification

Im currently writing a terrain editor for my game (for the record: no commercial intentions) and after having implemented the terrain morphing to my liking im now working on the texturing of said ...
3
votes
1answer
340 views

OpenGL - Drawing multiple meshes at once using VBOs and IBOs

I have been learning OpenGL 2.1 but using shaders, VBOs, IBOs, etc. I have gotten a rendering engine that can load and draw meshes, materials, forward lighting (no shadows yet), SceneNodes, and ...
3
votes
1answer
211 views

glm direction vector rotation

I'm working on a flight simulator, but I'm stuck with my airplane orientation. I tried some things but noone worked correctly. This is what I have : To be able to move it and roll it around himself, ...
1
vote
1answer
235 views

Simple framerate counter?

I'm making a first person shooter, and I've seen questions like this before, but the answer is either overly complicated or they're using SDL, GLFW, GLUT, or something else. I'm not using any of that. ...
0
votes
0answers
110 views

Error while loading PNG file with SDL2

I have been building a small game using SDL2 and C++ and started getting a weird error when trying to load a PNG. The error reads: libpng warning: Out of memory libpng error: IDAT: insufficient ...
1
vote
2answers
311 views

Entity Component System Coupling

Lately I've been working on a small personal project which is basically an Entity Component System framework with autoupdated Systems. While I have a pretty good idea on the way the framework should ...
0
votes
2answers
166 views

What does “~” in front of a function name inside a class mean? [closed]

I added a class using the 'add class' item in Visual Studio Express and it generated two functions in the .cpp file with the same names. But the second has the ~ character in front of it. What does ...
1
vote
0answers
65 views

How to rotate enemies on 2D radar and clip them to circle shape? [duplicate]

I've been working on implementing a 2D radar for a 3D game lately, it's working fine in a very basic version. This is what is looks like: It works by transforming the 3D coordinates of the enemies ...
-1
votes
1answer
136 views

How to encode game files or pack to one file like game_data.dat [duplicate]

I am a beginner C++ programmer. I am creating a custom Open Tibia Server and I use the alternative Tibia client (OTClient). I want encode game files (image, sound, lua, etc.) or pack all files into ...
0
votes
2answers
74 views

Disable lighting in DirectX10

I'm implementing a D3D10 version of my renderer (not porting to avoid losing Windows XP support). I didn't go straight to D3D11 because MSDN and other sources recommend upgrading to 10 and then to 11. ...
0
votes
1answer
73 views

Computing Field-of-View from window dimensions

I'm looking into computing the vertical Field-of-View (FOVy) based on the projection parameters of my camera. From this source, I've found an equation that seems to work. float ...
-1
votes
1answer
200 views

Slight pause/delay when moving

I've been working on this little framework for my game today and realized that moving delays when moving around. I've used SFML before and have had the same problem, but never bothered to fix it. I'm ...
3
votes
2answers
732 views

How to bind std::map to Lua with LuaBind

Is this possible in lua to achieve? player.scripts["movement"].properties["stat"] = "stand" print (player.scripts["movement"].properties["stat"]) I've done getter method in c++ with this approach: ...
4
votes
2answers
744 views

Debugging/Logging Techniques for End Users

I searched a bit, but didn't find anything particularly pertinent to my problem - so please do excuse me if I missed something! A few months back I inherited the source to a fairly-popular indie game ...
2
votes
2answers
298 views

Batching and Z-order with Alpha blending in a 3D world

I'm working on a game in a 3D world with 2D sprites only (like Don't Starve game). (OpenGL ES2 with C++) Currently, I'm ordering elements back to front before drawing them without batch (so 1 element ...
1
vote
2answers
119 views

How do I create a sound manager? [closed]

I have a basic entity system in place. Now I want to add audio. I want to make a database class that watches over entities, pulls data out of them, and creates audio streams whenever necessary. I'm ...
14
votes
5answers
1k views

Optimizing collision engine bottleneck

If this is your first time on this question, I suggest reading the pre-update part below first, then this part. Here's a synthesis of the problem, though: Basically, I have a collision detection ...
3
votes
2answers
125 views

How to detect Lagoons and Lakes on a random Island Map

I have an engine which generates random Islands. At the moment it tends to generate quite a lot of lagoons and lakes. I would like to know of a feasible way of detecting them so that I can mark them ...
0
votes
1answer
107 views

Loading Wavefront Data into VAO and Render It

I have successfully loaded a triangulated Wavefront (.obj) into 6 vectors, the first 3 vectors contain the locations for vertices, UV coords, and normals. The last three have the indices stored for ...
0
votes
0answers
14 views

How can I animate a sprite in cocos2d-x 2.2.1 c++? [duplicate]

Is there a way to do an animation without a .plist file? I'm having a hard time doing swap animation with sprites. For example, doing an animation while the user is not doing touches and the other ...
9
votes
3answers
13k views

How to play animations in Cocos2d-x?

I'm new to Cocos2d-x and looking for a good way/tutorial on how to play animations in Cocos2d-x.
1
vote
5answers
2k 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 ...
2
votes
1answer
74 views

Informing objects within a particular state of the world state

Following the State pattern, every state in my game is a derived object that reflects a particular segment of the game (MenuState, PlayingState, GameOverState, etc.) Each of those state objects holds ...
0
votes
2answers
591 views

Is it possible to use C++ with Unity instead of C#?

The title kind of says it all. Is it possible to replace C# with C++ on a game using Unity?
1
vote
1answer
80 views

Compute billboard rotation

I'm trying to compute a matrix to have object always facing the camera. For the moment, my result look pretty good, the problem is that my original billboard scale isn't preserved (Every billboard ...
2
votes
1answer
204 views

Anti-Aliasing in OpenGL [C++]

I'm trying to make anti-aliasing work inside of OpenGL, here's what I've tried: glEnable(GL_POINT_SMOOTH); glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); glEnable(GL_LINE_SMOOTH); ...
1
vote
1answer
133 views

C++: Checking if an object faces a point (within a certain range)

I have been working on a shooter game in C++, and am trying to add a feature whereby missiles shot must be within 90 degrees (PI/2 radians) of the direction the ship is facing. The missiles will be ...
0
votes
1answer
72 views

Proper way to encapsulate a Shader into different modules

I am planning to build a Shader system which can be accessed through different components/modules in C++. Each component has its own functionality like transform-relevated stuff (handle the MVP ...
0
votes
0answers
74 views

C++ OpenGL trouble trapping cursor in window

I am using OpenGL and I try to trap my cursor inside my game window (using both SetCursorPos and ClipCursor) But, these conflict with my camera rotation code as my camera is rotated with ...
-3
votes
1answer
420 views

Rotate camera with mouse? [closed]

Once again, using tutorial 10 at NeHe. I want the code if (keys[VK_RIGHT]) // Is The Right Arrow Being Pressed? { yrot -= 1.5f; // Rotate The ...