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  • Rotate camera with mouse? [closed]

    - by ezio160324
    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 Scene To The Left } if (keys[VK_LEFT]) // Is The Left Arrow Being Pressed? { yrot += 1.5f; // Rotate The Scene To The Right } and if (keys[VK_PRIOR]) { lookupdown -= 1.0f; } if (keys[VK_NEXT]) { lookupdown += 1.0f; } to be done with the mouse instead of left/right arrow and Page Up/ Page Down. I tried everything I could think of. Can anyone help? EDIT: I tried using WM_MOUSEMOVE message. I just could not figure it out. EDIT2: I am using pure OpenGL to do this. No window management system or other libs such as GLUT, GLFW, SDL, SFML etc. Just OpenGL. OpenGL and GLEW. EDIT: Issue has been solved.

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  • Basic/research RTS engine/model

    - by XTF
    Does a basic/research RTS engine/model exist that can be used as a basis for further experimentation/research? I'd like to avoid reinventing the wheel if possible. I'm aware of Spring Engine and Stratagus, but those are real game engines and may not be the best to experiment with and learn from. Ideally the docs for the model would answer questions like: How exactly do units move? (constant velocity? constant acceleration? constant force?) How is pathfinding handled? Does every grid cell become an A* graph node (may be expensive)? Does it consider threats? How are groups handled? (w.r.t pathfinding and movement) How is combat handled? I'm mostly interested in the low-level model details (for now), not the graphics etc. I've read a lot of the other quesions (and answers/references) tagged RTS but I haven't found my answer yet.

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  • Game programming and quantity of timers

    - by andresjb
    I've made a simple 2D game engine using C# and DirectX and it's fully functional for the demo I made to test it. I have a Timer object that uses QueryPerformanceCounter and I don't know what's the better choice: use only one timer in the game loop to update everything in the game, or an independent timer in every object that needs one. My worry is that when I try to implement threads, what will happen with timers? What happens with the sync?

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  • Reasons why AppHub samples won't build?

    - by user13909
    I have an issue off of most downloaded projects where whenever I build it, VS2010 just crashes. I had this issue a while before, and it was widespread, I reinstalled, and it worked fine afterwards. If I create my own XNA project, and copy all of classes and assets over (which I admit, is super fun anyway) things build fine. But if I just download the project from here http://create.msdn.com/en-US/education/catalog/sample/roleplaying_game (RolePlayingGame_4_0_Win_Xbox.zip) and try to build, it automatically stops working, restarts, and reopens the project. If I Debug/Deploy to my Xbox, I do get a sucessful version to the Xbox, but VS2010 still stops and restarts. I've already repaired, and reinstalled again, still having the issue. Can anything think of plausible solutions?

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  • Want to make RTS strategy game, good starting point...?

    - by NOLANDI
    everybody! I find this community because I did research about game developing topics. So I decide to register on this community and ask for your opinion. I am not begineer in computer stuffs, and I know logic of programming language. I have little knowlegde of C, C++, Started to learn C#...but I was always oriented about other areas of IT. Amateur for game making but not in IT general! I am interested to make RTS strategy video game, isometric camera view (like PC GAME COMMANDOS for example)...so I started to read many books about DirectX, XNA, OpenGL, C#, AI programming...so I want to know where is good starting point for making this game genre. I want to use C# for this project, not C++, since I always had trouble with it, because it is too complicated. I see good oportunity for learning C#, since it has more object-oriented concept, with much less code and easy readible code for writing. Beside of that I know that C++ is the more powerful language until today. So I want to use DirectX and C# for my project. But it will required more time for sure, to learn it. I have trouble with finding books for c# & DirectX (I found just one), but in every next book, it is programming in c++! I read many web sites and they mentioned Slim DX, and in generaly, other articles which I read tells that it is possible to make good game with combination c# and directX, but...I don't have enough information about all this stuffs, so I became confused! It is really hard to have wish to learn c++ from scratch, since I started c# and I like it really...I don't try OpenGL, but I am already familiar with DirectX (some beginning stuffs), and I think that it is good and interesting. So, I decide to choose between maybe Unity3d and XNA first. XNA...hm, it sound that it is not bad solution, but I heard that it is already overcome technology, and I think that it is better to wait with XNA, until I try to make something with DirectX and C#, at first. But I dont know it is possible to make strategy game in XNA?! Maybe I am wrong. I also, find Unity 3D game engine and I find that I could programming there in C#, but many all examples are written in Javascript (Digital tutors videos)...But I generaly have wish to learn it too, because it allows to export games to mobile phones, there a lot of documentations, it is free, etc... I want to find best way to learn C# and DirectX, and make this game, but I dont know if it's possible to combine?! But maybe is good to first try Unity and XNA, because I am beginner?! Thank you all! I am willing to hear your expirience.

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  • Making a physicalized melee weapon

    - by xuincherguixe
    The short version, is that I was asked to look into the feasibility of making a melee weapon, that one could swing at another object in the game, and have it interact physically. I completed the tutorial here http://www.mavrikgames.com/tutorials/melee-weapons, and proved that indeed it is. The thing is, that only for a brief period in the swing is the sword capable of knocking things around. I've looked through the editor and code for awhile now, and I'm still not sure how to do this. I was able to lengthen the amount of time it takes the animations run for, but not the length of time with which the sword can bash the barrel around.

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  • Resource Managers - Are they any good?

    - by The Communist Duck
    Hey. I've seen many a time in source code, things like this [well, this is more of a pseudo C++ idea of mine] type defshared_ptr ResourcePtr;// for ease ResourcePtr sound1 = resourceManager.Get("boom.ogg"); sound1-Play(); ResourcePtr sprite = resourceManager.Get("sprite.png"); I was just wondering how useful a class like this was, something that: Loaded media files Stored them in memory Did this at the start of a level - loading screen. Cleaned up Rather than having a system of: Resources are held by entities only, or loose. Responsible for own load into memory. The first is a 'manager' as such; something I feel indicates it's wrong to use. However, it allows for something like a vector of resource names to be passed, rather than having to scramble around finding everything that needs to be loaded.

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  • STL for games, yea or nay?

    - by munificent
    Every programming language has its standard library of containers, algorithms, and other helpful stuff. With languages like C#, Java, and Python, it's practically inconceivable to use the language without its standard lib. Yet, on many C++ games I've worked on, we either didn't use the STL at all, used a tiny fraction of it, or used our own implementation. It's hard to tell if that was a sound decision for our games, or one simply made out of ignorance of the STL. So... is the STL a good fit or not?

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  • Placing items randomly in a dynamically generated terrain

    - by Programlocura
    I'm currently working on a 'Tiny wings' like game. I've already asked about the angle of the items in curved lines and i solved (thank you for responses),i'm currently placing the items in random positions, but the terrain it's dynamically and i don't get this working. I've a vector with the points of the terrain, and i'm doing something similar to this (Iterating trough vector): if( _SPManager && i % 15 == 0 && i != 0 ) { if ( _settings.specialPoints && _currentPoints < _settings.specialPoints ) { _SPManager.addPoint( _hillsPosition[i].x , _hillsPosition[i].y ); _currentPoints++; } } But it isn't working as i expected. It isn't displaying the right number of items (Always shows less than i specified). How do i should place the items? Thanks :)

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  • Version Not Final, Does not represent actual game footage?

    - by thinly veiled question mark
    Just curious about this. Frequently, a lot of gameplay videos from big studios have small subtitled text at the lower part of the screen, reading something like: Pre-Alpha Gameplay -- Footage not Final Game Footage not Final Pre-Alpha, Game here is not final Is there some sort of reason they do this? Is there some sort of legal ramification that they need to go through by adding this? I have especially seen some gameplay vids whose titles are "Alpha x.x.x", yet still, in the video itself, it always something like "footage not final, game may change".

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  • Make the player run onto stairs smoothly

    - by misiMe
    I have a 2D Platform game, where the player Always runs to the right, but the terrain isn't Always horizontal. Example: I implemented a bounding-box collision system that just checks for intersections with player box and the other blocks, to stop player from running if you encounter a big block, so that you have to jump, but when I put stairs, I want him to run smoothly just like he is on the horizontal ground. With the collision system you have to jump the stairs in order to pass them! I thought about generating a line between the edges of the stairs, and imposing the player movement on that line... What do you think? Is there something more clever to do?

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  • Is this a reliable method of parsing glGetShaderInfoLog()?

    - by m4ttbush
    I want to get a list of errors and their line numbers so I can display the error information differently from how it's formatted in the error string and also to show the line in the output. It looks easy enough to just parse the result of glGetShaderInfoLog(), look for ERROR:, then read the next number up to :, and then the next, and finally the error description up to the next newline. However, the OpenGL docs say: Application developers should not expect different OpenGL implementations to produce identical information logs. This makes me worry that my code may behave incorrectly on different systems. I don't need them to be identical, I just need them to follow the same format. So is there a better way to get a list of errors with the line number separate, is it safe to assume that they'll always follow the "ERROR: 0:123:" format, or is there simply no reliable way to do this?

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  • Multiplayer in a game. How to design it object wise?

    - by Ninetou
    I was suggested on StackOverflow to ask this question here. I'm working on a simple game and I was thinking of adding multiplayer feature but I'm a bit stuck. I'm not sure what approach should I take, keeping in mind good programming practices. I have a Player object which is created for each player but then I have many other classes that would have to be able to access them. The thing is, if I initialise them in, let's say my main method, then I can't relate to different instances of player class from other classes. The only solution to my problem that comes to my mind is using some form of global objects but afaik using anything globally in apps is usually not a good practice. Any suggestions/ideas?

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  • Does anyone write games in Delphi?

    - by MDV2000
    I am a very seasoned Delphi developer (over 12 years of experience not counting my Turbo Pascal experience) and was wondering does anyone write games in Delphi? I have seen DirectX API wrappers in Delphi that allow you to program against DirectX (even wrote a simple solitaire game with a friend), but haven't seen anything out there that shows me that I should keep up with Delphi. I just hate to walk away from so much knowledge and Object Pascal language, but I am not seeing much as to a reason to keep going with Delphi. I currently program in C# and thinking about XNA, but it seems to me that the dominating opinion is go C/C++ route with DirectX. Any other Delphi developers out there struggle with this too? Thanks, MDV

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  • How many views can be bound to a 2D texture at a time?

    - by Recker
    I am a newbie trying to learn on DX11.x. While reading about resources and views in MSDN, I thought this question For a given 2D Texture created with ID3D11Texture2Dinterface (or for that matter any kind of resource), how many of following views can be bound to it? 1) DepthStencilView 2) RenderTargetView 3) ShaderResourceView 4) UnorderedAccessView Thanks in advance. PS: I know the answer would be app specific, but still any insight into this would be helpful.

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  • Getting velocity in only one plane (X) in Kismet (UDK)

    - by anna1987
    I'm trying to make a character in 2.5 platformer (in UDK) to "climb" a giant tree trunk by walking on a spiral staircase enveloped around the tree. When character goes right the tree rotates thru matinee sequence so it seems that the character is moving while in reality it is the tree that moves. I connected the matinee sequence playrate to the velocity of the character and its all good as long the character just moves left or right. When it jumps though, the velocity still affects the playrate - it should not as character moves up/down, not right/left. How do I set it up in Kismet so I get a float variable with velocity only in the X plane (horizontal)?

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  • Should I be worrying about limiting the number of textures in my game?

    - by Donutz
    I am working on a GUI in XNA 4.0 at the moment. (Before you point out that there are many GUIs already in existance, this is as much a learning exercise as a practical project). As you may know, controls and dialogs in Windows actually consist of a number of system-level windows. For instance, a dialog box may consist of a window for the whole dialog, a child window for the client area, another window (barely showing) for the frame, and so on. This makes detecting mouse hits and doing clipping relatively easy. I'd like to design my XNA GUI along the same lines, but using overlapping Textures instead of windows obviously. My question (yes, there's actually a question in this drivel) is: am I at risk of adversely affecting game performance and/or running low in resources if I get too nuts with the creating of many small textures? I haven't been able to find much information on how resource-tight the XNA environment actually is. I grew up in the days of 64K ram so I'm used to obsessing about resources and optimization. Anyway, any feedback appreciated.

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  • Architects into videogames

    - by Ángel
    I'm an architecture student in my last year. I've always been interested in videogames design. I use 3d Max and Photoshop on a daily basis, and I was thinking about aiming for a career in videogames, starting as a level/environment designer. How should approach it? Is it worthy to spend some time learning UDK or CryEngine? Should I try a smaller but more general software? I know some programming already. Finally, will my skills as an architect be something valuable in the indusrty? Thanks in advance.

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  • What class to use in order to have a number move around the screen?

    - by AllenZ41
    What i am trying to accomplish is have a randomly created number move around the screen but it is touchable. I am planning to have lots of numbers on the screen, so my question is what class is appropriate to use, so I could set a number randomly at run time and display it while it moves around the screen? I was planning the use a TextView, since I want to use a custom font of mine but I think creating a bunch at a time could cause a memory problem and to my understanding they cant move around the screen at runtime.

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  • Object array updates one instance repeatedly [on hold]

    - by MGN001
    I'm making a 2D shooter, and the player object holds an array of bullets that represent how many shots the player can have on screen at once. At least, this is what I'm trying for. What's happening is that each time any of the objects in the array is called, it seems to update a single object in memory. So, if I fire and then fire again, the object "starts over" from where I shot from and moves twice as fast. I've spent weeks trying to fix this and I've managed nothing. Hopefully another pair of eyes will see something I've missed. Player.cpp #include "Player.h" const int startLives = 3; const int maxHealth = 2; const float speed = 1; const int maxVelocity = 500; const int topBound = WINDOW_HEIGHT / 5 * 3; const int slowRate = 500; const int accRate = 1000; const int maxBullets = 5; const float spriteWidth = 99; const float spriteHeight = 75; const Vector2f startPosition = { (WINDOW_WIDTH / 2) - (spriteWidth / 2), (WINDOW_HEIGHT / 4 * 3) - (spriteHeight / 2) }; Bullet bullets[maxBullets]; Bullet * bulletPointers[maxBullets]; SDL_Texture * playerHealthy; SDL_Texture * playerDamaged; SDL_Texture * currentSprite; SDL_Rect * rect; Vector2f position; Vector2f velocity; int Health; int Lives; Player::Player() { rect = new SDL_Rect(); } Player::~Player() { SDL_DestroyTexture(playerHealthy); SDL_DestroyTexture(playerDamaged); SDL_DestroyTexture(currentSprite); rect = NULL; } void Player::Initialize(SDL_Renderer * renderer) { SDL_Surface * temp; temp = IMG_Load(".\\Sprites\\player.png"); if (temp == NULL) { printf("Initialization Error: %s\n", IMG_GetError()); exit(PLAYER_INITIALIZATION_ERROR); } playerHealthy = SDL_CreateTextureFromSurface(renderer, temp); temp = IMG_Load(".\\Sprites\\playerDamaged.png"); if (temp == NULL) { printf("Initialization Error: %s\n", IMG_GetError()); exit(PLAYER_INITIALIZATION_ERROR); } playerDamaged = SDL_CreateTextureFromSurface(renderer, temp); temp = IMG_Load(".\\Sprites\\laserGreen.png"); if (temp == NULL) { printf("Initialization Error: %s\n", IMG_GetError()); exit(PLAYER_INITIALIZATION_ERROR); } SDL_Texture * bullet = SDL_CreateTextureFromSurface(renderer, temp); temp = IMG_Load(".\\Sprites\\laserGreenShot.png"); if (temp == NULL) { printf("Initialization Error: %s\n", IMG_GetError()); exit(PLAYER_INITIALIZATION_ERROR); } SDL_Texture * explosion = SDL_CreateTextureFromSurface(renderer, temp); for (int i = 0; i < maxBullets; i++) { bullets[i].Initialize(renderer, bullet, explosion); bulletPointers[i] = NULL; } temp = NULL; rect->h = spriteHeight; rect->w = spriteWidth; Reset(); } void Player::Update(Input input, float deltaTime) { if (abs(velocity.x) < slowRate * deltaTime) { velocity.x = 0; } else if (velocity.x > 0) { velocity.x -= slowRate * deltaTime; } else if (velocity.x < 0) { velocity.x += slowRate * deltaTime; } if (abs(velocity.y) < slowRate * deltaTime) { velocity.y = 0; } if (velocity.y > 0) { velocity.y -= slowRate * deltaTime; } else if (velocity.y < 0) { velocity.y += slowRate * deltaTime; } if (Health <= 0) { --Lives; Spawn(); } velocity.x += UnitVector(input.InputNew.movement).x * accRate * deltaTime; velocity.y += UnitVector(input.InputNew.movement).y * accRate * deltaTime; if (Magnitude(velocity) > maxVelocity) { velocity.x = UnitVector(velocity).x * maxVelocity; velocity.y = UnitVector(velocity).y * maxVelocity; } position.x += velocity.x * deltaTime * speed; position.y += velocity.y * deltaTime * speed; if (input.InputNew.JumpLeft && !input.InputOld.JumpLeft) { position.x -= spriteWidth; } if (input.InputNew.JumpRight && !input.InputOld.JumpRight) { position.x += spriteWidth; } Boundaries(); rect->x = position.x; rect->y = position.y; if (input.InputNew.Fire && !input.InputOld.Fire) { Fire(); } for (int i = 0; i < maxBullets; ++i) { if (bulletPointers[i] != NULL) { bullets[i].Update(deltaTime); if (bullets[i].getPosition().y < -33) { bulletPointers[i] = NULL; } } } } void Player::Draw(SDL_Renderer * renderer) { for (int i = 0; i < maxBullets; ++i) { if (bulletPointers[i] != NULL) { bullets[i].Draw(renderer); } } SDL_RenderCopy(renderer, currentSprite, NULL, rect); } void Player::Spawn() { position = startPosition; Health = maxHealth; currentSprite = playerHealthy; rect->x = position.x; rect->y = position.y; } void Player::Boundaries() { if (position.x < 0) { position.x = 0; velocity.x *= -1; } else if (position.x > WINDOW_WIDTH - spriteWidth) { position.x = WINDOW_WIDTH - spriteWidth; velocity.x *= -1; } if (position.y < topBound) { position.y = topBound; velocity.y *= -1; } else if (position.y > WINDOW_HEIGHT - spriteHeight) { position.y = WINDOW_HEIGHT - spriteHeight; velocity.y *= -1; } } int Player::getLives() { return Lives; } void Player::Reset() { Lives = startLives; Spawn(); } void Player::Fire() { for (int i = 0; i < maxBullets; ++i) { if (bulletPointers[i] == NULL) { bulletPointers[i] = &bullets[i]; bullets[i].Fire(position,velocity.x/2); break; } } } Bullet.cpp #include "Bullet.h" const int speed = 500; Vector2f bulletVelocity; float ExplosionMax = 0.5f; float ExplosionTimer; const Vector2f fireOffset = { 45.5f, 10.0f }; const Vector2f explosionOffset = { 23.5f, -27.0f }; const Vector2i bulletSize = { 9, 33 }; const Vector2i explosionSize = { 56, 54 }; Vector2f bulletPosition; SDL_Texture * bulletSprite; SDL_Texture * explosionSprite; SDL_Texture * bulletCurrentSprite; SDL_Rect * bulletRect; Bullet::Bullet() { } Bullet::~Bullet() { } void Bullet::Initialize(SDL_Renderer * renderer, SDL_Texture * bullet, SDL_Texture * explosion) { bulletSprite = bullet; explosionSprite = explosion; bulletRect = new SDL_Rect(); } void Bullet::Update(float deltaTime) { bulletPosition.y -= bulletVelocity.y * deltaTime; bulletPosition.x += bulletVelocity.x * deltaTime; bulletRect->x = static_cast<int>(bulletPosition.x); bulletRect->y = static_cast<int>(bulletPosition.y); } void Bullet::Draw(SDL_Renderer * renderer) { SDL_RenderCopy(renderer, bulletCurrentSprite, NULL, bulletRect); } void Bullet::Fire(Vector2f pos, float xSpeed) { bulletPosition.x = pos.x + fireOffset.x; bulletPosition.y = pos.y + fireOffset.y; bulletVelocity.x = xSpeed; bulletVelocity.y = speed; bulletCurrentSprite = bulletSprite; bulletRect->h = bulletSize.y; bulletRect->w = bulletSize.x; bulletRect->x = static_cast<int>(bulletPosition.x); bulletRect->y = static_cast<int>(bulletPosition.y); } Vector2f Bullet::getPosition() { return bulletPosition; } void Bullet::Hit() { bulletCurrentSprite = explosionSprite; bulletVelocity = { 0.0f, 0.0f }; ExplosionTimer = ExplosionMax; bulletPosition.x += explosionOffset.x; bulletPosition.y += explosionOffset.y; bulletRect->w = explosionSize.x; bulletRect->h = explosionSize.y; }

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  • Efficiency of iterators and alternatives? [migrated]

    - by user48037
    I have the following code for my game tiles: std::vector<GameObject_Tile*>::iterator it; for(int y = 0; y < GAME_TILES_Y; y++) { for(int x = 0; x < GAME_TILES_X; x++) { for (it = gameTiles[x][y].tiles.begin() ; it != gameTiles[x][y].tiles.end(); ++it) {}}} tiles is: struct Game_Tile { // More specific object types will be added here eventually vector<GameObject_Tile*> tiles; }; My problem is that if I change the vector to just be a single GameObject_Tile* instead and remove the iterator line in the loop I go from about 200fps to 450fps. Some context: The vector/pointer only contains one object in both scenarios. I will eventually need to store multiple, but for testing I just set it to a single pointer. The loop goes through 2,300 objects each frame and draws them. I would like to point out that if I remove the Draw (not seen int he example) method, I gain about 30 frames in both scenarios, the issue is the iteration. So I am wondering why having this as a vector being looped through by an iterator (to get at a single object) is costing me over 200 frames when compared to it being a single pointer? The 200+ frames faster code is: std::vector<GameObject_Tile*>::iterator it; for(int y = 0; y < GAME_TILES_Y; y++) { for(int x = 0; x < GAME_TILES_X; x++) { //gameTiles[x][y].tiles is used as a pointer here instead of using *it }} tiles is: struct Game_Tile { // More specific object types will be added here eventually GameObject_Tile* tiles; };

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  • How do I split a texture into differently shaped pieces with libgdx?

    - by VictorB
    I want to split a texture into variously shaped pieces with libgdx, like the pieces of a puzzle game. TextureRegion.split() is not an option, as it splits into equally sized rectangular texture regions. The "Similar Questions" section here is helpful (particularly this question How do I break an image into 6 or 8 pieces of different shapes?), but I'm not sure yet if it's possible to implement the solution with libgdx. Any pointers?

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  • How to get a good picture of the health of a level-based game from analytics?

    - by ADB
    I am designing a level-based game where the user completes the level 1, then 2, 3 and so on. There are 200 levels and each is rather short: 60-ish seconds. I am tracking Each played, completed (cleared for the first time), failed and cleared level Milestones: number of players to reach level 1, 5, 10, etc. Also for number of failed and played levels. Separate new players from returning ones. However, I still find it difficult to get a clear picture of what is going on from the stats. So what are the best practices for determining where I am losing players?

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  • COCOS2D-html5 MoveBy doesn't work

    - by ufo
    I'd like to run an action on a sprite using the MoveBy action. After lots of attempts, I can't achieve the goal... I have issues with the MoveBy in 2 different projects, so maybe I'm missing something in the setup... But I can't figure what! The instruction is like this: this.platform1Sprite.runAction(cc.MoveBy.create(1, cc.p(200, 0))); I don't get any error, simply it doesn't work. Thank you in advance.

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