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• Will there be any more books in the Game Programming Gems series?

  - by Laurent Couvidou

  It's been more than three years now that the last Game Programming Gems book was published. The official website isn't updated anymore, and this page of Mark DeLoura's website seems to imply that the series is over. Was there ever an official statement about this? Was number 8 the last book? The Game Programming Gems were one of the most (if not the most) important resource for me and probably thousands of developers around the globe, did the Internet kill them?

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• (Phaser) Preload Future States in Create?

  - by Brian

  I'm a first time user of Phaser, been trying to make a simple point and click type game. I'm trying to keep things very modular, so I'm defining a list of levels (states) in a JSON, and then every level has its own JSON containing the objects within that level. However, I'm encountering an issue in that, when changing states, I get a black flash while the assets for the next state load (this happens whether I iterate through the JSON list or define everything manually). From what I've read, all sprites should be loaded in the preload stage, however, by doing this I'm causing that tiny but noticeable black pause. I know one way would be to simply load every asset at the start of the game, but that seems incredibly inefficient (wouldn't that fill up the memory immensely?). I would rather load a state's assets from the "parent" state. However, in my quick test (which maybe I did wrong) it seems that game.load doesn't work properly if done within the create stage? What is the best approach to doing this?

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• Cocos2d: Using single timer/scheduler for multiple sprites

  - by Shailesh_ios

  want to know if is it possible to use single timer or scheduler method for multiple sprites ? Like I am now working on a game and there could be any number of sprites and i want to perform some actions on all of that sprites, So do I have to use as many timers or schedulers as sprites ? Or How can the job be done using only a single timer or scheduler ? What is I schedule a method and use it for, Say 10 sprites ? Will it affect the performance..?

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• Actionscript - Dropping Multiple Objects Using an Array? [closed]

  - by Eratosthenes

  Possible Duplicate: Actionscript - Dropping Multiple Objects Using an Array? I'm trying to get these fireBalls to drop more often, im not sure if im using Math.random correctly also, for some reason I'm getting a null reference because I think the fireBalls array waits for one to leave the stage before dropping another one? this is the relevant code: var sun:Sun=new Sun var fireBalls:Array=new Array() var left:Boolean; function onEnterFrame(event:Event){ if (left) { sun.x = sun.x - 15; }else{ sun.x = sun.x + 15; } if (fireBalls.length>0&&fireBalls[0].y>stage.stageHeight){ // Fireballs exit stage removeChild(fireBalls[0]); fireBalls.shift(); } for (var j:int=0; j<fireBalls.length; j++){ fireBalls[j].y=fireBalls[j].y+15; if (fireBalls[j].y>stage.stageHeight-fireBall.width/2){ } } if (Math.random()<.2){ // Fireballs shooting from Sun var fireBall:FireBall=new FireBall; fireBall.x=sun.x; addChild(fireBall); fireBalls.push(fireBall); } }

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• Is there a prohibition against scaling collision shapes at runtime?

  - by Almo

  So, I have a StaticMeshComponent attached to an Actor: Begin Object Class=StaticMeshComponent Name=StaticMeshComponentObject StaticMesh=StaticMesh'QF_Art_Powers.Mesh.GP_ForcePush' CollideActors=true BlockActors=false //Scale3D=(X=5, Y=1.5, Z=3) // ALMODEBUG End Object CollisionComponent=StaticMeshComponentObject Components.Add(StaticMeshComponentObject) Ordinarily, the actor gets spawned, anything touching it gets bumped, and the actor despawns itself. If I set the Scale3D as a default property, everything works as I expect. But I want to scale it at runtime, like this: function SetImpulseComponentTemplate(QuadForceBoxImpulseComponent Value) { Local Vector ScaleVec; ScaleVec.X = Value.Length; ScaleVec.Y = Value.Width; ScaleVec.Z = Value.Height; CollisionComponent.SetScale3D(ScaleVec); } When I do this, the thing only collides as if it were not scaled. If I leave the actor spawned so I can see it, it is scaled. If I also "show collision", the collision displays correctly as well. Is there a prohibition against scaling collision shapes at runtime?

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• UDK: Toggle Material on Brushes?

  - by user50300

  I'm attempting to change / toggle the material that's applied to a BSP brush. I've seen where it's possible on static meshes, but I can't seem to get it to work on brushes. Below is an example scenario. The ground (BSP Brush) is covered in a stone material The player hits a trigger. A new "moss" material is applied to the brush, removing the old stone material. Any assistance you could offer would be greatly appreciated.

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• writing 3d game [closed]

  - by user1432980

  I want to write a game as my final year diploma project.(I'm a 4th-year-student now so I've got a year and several months). But I don't know what to choose: either write my own game engine using DirectX9(10)(I don't like OpenGL) or use OGRE + PhysX(Don't like Unity) I'm more interested in writing my own game engine(but I wonder if I'll create engine on the same level as even Unreal 1.0 hah) but on the other side with PhysX I'll have advanced physics in my game and with OGRE I'll have good grahics. For 3d models I want to use Maya. What do you advise me to choose? As for me I've got a little DirectX experience,not bad C++ programming skills(but not expert's) and a little knowledge of Maya. My English isn't perfect either hah...

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• Is it legal to develop a game usung some version of D&D, something similar to Baldurs Gate?

  - by Max

  For a while now I've been thinking about trying my hand at creating a game similar in spirit and execution to Baldurs Gate, Icewind Dale and offshoots. I'd rather not face the full bulk of work in implementing my own RPG system - I'd like to use D&D rules. Now, reading about the subject it seems there is something called "The License" which allows a company to brand a game as D&D. This license seems to be exclusive, and let's just say I don't have the money to buy it :p. Is it still legal for me to implement and release such a game? Commercially or open-source? I'm not sure exactly which edition would fit the best, but since Baldurs Gate is based of 2nd edition, could I go ahead an implement that? in short: what are the issues concerning licensing and publishing when it comes to D&D? Also: Didn't see any similar question...

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• Slide 2d Vector to destination over a period of time

  - by SchautDollar

  I am making a library of GUI controls for games I make with XNA. I am currently developing the library as I make a game so I can test the features and find errors/bugs and hopefully smash them right away. My current issue is on a slide feature I want to implement for my base class that all controls inherit. My goal is to get the control to slide to a specified point over a specified amount of time. Here is the #region containing the code #region Slide private bool sliding; private Vector2 endPoint; private float slideTimeLeft; private float speed; private bool wasEnabled; private Vector2 slideDirection; private float slideDistance; public void Slide(Vector2 startPoint, Vector2 endPoint, float slideTime) { this.location = startPoint; Slide(endPoint,slideTime); } public void Slide(Vector2 endPoint, float slideTime) { this.wasEnabled = this.enabled; this.enabled = false; this.sliding = true; Vector2 tempLength = endPoint - this.location; this.slideDistance = tempLength.Length(); //Was this.slideDistance = (float)Math.Sqrt(tempLength.LengthSquared()); this.speed = slideTime / this.slideDistance; this.endPoint = endPoint; this.slideTimeLeft = slideTime; } private void UpdateSlide(GameTime gameTime) { if (this.sliding) { this.slideTimeLeft -= gameTime.ElapsedGameTime.Milliseconds; if (this.slideTimeLeft >= 0 ) { if ((this.endPoint-this.location).Length() != 0){//Was if (this.endPoint.LengthSquared() > 0 || this.location.LengthSquared() > 0) { this.slideDirection = Vector2.Normalize(this.endPoint - this.location); } this.location += this.slideDirection * speed * gameTime.ElapsedGameTime.Milliseconds;//This is where I believe the issue is, but I'm not sure. It seems right to me... (Even though it doesn't work) } else { this.enabled = this.wasEnabled; this.location = this.endPoint;//After time, the controls position will get set to be the endpoint. this.sliding = false; } } } #endregion this.location is the location of the control elsewhere defined in the class. I have looked at this blog as a huge reference and have googled around quite and have looked on many forums but can't find anything that shows how to implement it. Please and Thanks for your time! EDIT: I have switched this line "this.location += this.slideDirection * speed * gameTime.ElapsedGameTime.Milliseconds;" several times to see what it does. My issue is getting the control to smoothly move to the end location. It moves after the time has expired, but It doesn't move other then that except flash in my face. EDIT2: I have used the first slide method with 3 parameters and it works except it doesn't do it in a period of time and once it gets to its destination, it starts moving randomly towards the previous location and the end location.

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• How do you set the movement speed of a sprite?

  - by rphello101

  I'm using Slick 2D/Java to play around with graphics. Getting an image to move is easy: Input input = gc.getInput(); if(input.isKeyDown(sprite.up)){ sprite.y--; }else if (input.isKeyDown(sprite.down)){ sprite.y++; }else if (input.isKeyDown(sprite.left)){ sprite.x--; }else if (input.isKeyDown(sprite.right)){ sprite.x++; } However, this is called on every update, so if you hold up, the sprite moves to the edge of the screen in a few hundred milliseconds. Since coordinates are integers, I can't add less than 1 to slow the sprite down. I'm assuming I must have to implement a timer of some sort or something. Any advice?

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• Where to generate data in an Entity-Component System?

  - by Mark Mandel

  So I'm making a small game where I generate 2D landscape using perlin noise when the game first loads. I've got it working in a OO way, but want to move over to an ES architecure, and I'm just struggling to work out the right place for the code that does the generation to go? In OO world, I have a World object which gets passes a coordinate value that is used as the seed for the perlin noise, and generates all the points for the land mass when the world is created. I'm thinking I need a World component with a coordinate field on it - that's an easy part. From there - is it right for a component to generate data when it's first initialised (or is that too OO?)? Or should a System be doing that instead, when the game first starts? Or... some other solution I'm not aware of? Thanks in advance for any guidance.

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• XNA + Windows Forms: How make them work together without making the trick of the custom GraphicsDeviceControl?

  - by Renann

  What I've found is a solution where you have to code a custom GraphicsDeviceControl to put inside the form (the well known tutorial from the APPHub), but that's not what I'm searching for. I would like to say that before start to right my question here, I "googled" a lot and I saw some questions here, but I couldn't find what I'm looking for. I would like to have the Draw/Update loops completly managed by XNAFrameWork (with XNA project and so), and not by a custom component. I hope you understand what I asked. Thanks in advance. Edit What's the most important thing for me and wasn't shown in the tutorial of APPHub is: where I have to put the input handling? That's one the problems that wasn't covered by the tutorial.

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• EXC_BAD_ACCESS error when box2d joint is destroyed

  - by colilo

  When I destroy the weldJoint in the update method (see below) I get an EXC_BAD_ACCESS error pointing to the line world->DestroyJoint(weldJoint); in the update method below: -(void) update: (ccTime) dt { int32 velocityIterations = 8; int32 positionIterations = 1; // Instruct the world to perform a single step of simulation. It is // generally best to keep the time step and iterations fixed. world->Step(dt, velocityIterations, positionIterations); // using the iterator pos over the set std::set<BodyPair *>::iterator pos; for(pos = bodiesForJoints.begin(); pos != bodiesForJoints.end(); ++pos) { b2WeldJointDef weldJointDef; BodyPair *bodyPair = *pos; b2Body *bodyA = bodyPair->bodyA; b2Body *bodyB = bodyPair->bodyB; weldJointDef.Initialize(bodyA, bodyB, bodyA->GetWorldCenter()); weldJointDef.collideConnected = false; weldJoint = (b2WeldJoint*) world->CreateJoint(&weldJointDef); // Free the structure we allocated earlier. free(bodyPair); // Remove the entry from the set. bodiesForJoints.erase(pos); } for(b2Body *b = world->GetBodyList(); b; b=b->GetNext()) { if (b->GetUserData() != NULL) { CCSprite *mainSprite = (CCSprite*)b->GetUserData(); if (mainSprite.tag == 1) { mainSprite.position = CGPointMake( b->GetPosition().x * PTM_RATIO, b->GetPosition().y * PTM_RATIO); CGPoint mainSpritePosition = mainSprite.position; if (mainSprite.isMoved) { world->DestroyJoint(weldJoint); } } } } } In the HelloWorldLayer.h I set the weldJoint with the assign property. Am I destroying the joint in the wrong way? I would really appreciate any help. Thanks

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• Which one is better to get started? [closed]

  - by vanangamudi

  Which one of the open-source game engine is better to get started? I read several threads over several forums and found that it is better to write own game engine specific to application. But I need to know the requirements of a game engine, other than Graphics, Physics and AI... Many people suggested Unity, But I need open-source version so that I can have a look at implementation... so I google rigorously and found some unknown game engines(at least to me) Unvanquished Cube Spring Pyrogenesis Torque3D CrystalSpace Panda3D Delta3D Irrichlt OpenArena AlienArena (please list others if I missed anything....) FYI: my present focus is on FPS/TPS. Can you tell me which one is better at performance if possible? Torque3D claims to be the best opensource engine - is that true, and if so to what extent?

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• How can you store item data from a game?

  - by ThePlan

  When I look at games such as warcraft 3, or Diablo, or basically any games that contain items in them I notice that each item is unique. They all have different stats, different graphics, different names. I took a wild guess that they don't use XML, although I know I might be wrong, but I just figured they use something that isn't easily human-editable to prevent casual hacking. How is data such as item attributes stored in a game (2d or 3d, I suppose it works the same way in both)?

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• Huge 2d pixelized world

  - by aspcartman

  I would like to make a game field in a indie-strategic 2d game to be some a-like this popular picture. http://0.static.wix.com/media/6a83ae_cd307e45ffd9c6b145237263ac1a86be.jpg_1024 So every "pixel"(blocks) changes it's color slowly, sometimes a bright color wave happens, etc, but the spaces beetwen this pixels should stay dark (not to count shades, lightning and other 3rd party stuff going on). Units are going to be same "pixelized" and should position them-selfs according those blocks. I have some experience in game-developing, but this task seems not trivial for me. What approaches (shader, tons of sprites or code-render, i don't now) would you recommend me to follow? (I'm thinking of making this game using Unity Engine) Thanks everyone! :)

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• Can I legally make a free clone of a game and use the same name? [closed]

  - by BlueMonkMN

  I gather from Is it legally possible to make a clone of the game? and How closely can a game resemble another game without legal problems that I should not try to profit from a clone if it is using the same assets, and, I presume, the same name. My question is whether it's legal to make a game like "Set" or "Catch Phrase", using the same name, and release it for free. What would I be risking if I did so -- just a take down notice, or could there be financial risk too? Edit: I guess my real question is whether the legal freedom is greater for a free game than one that is trying to make a profit. I just want a version of the game I can play remotely. Edit 2: I don't understand why this is being considered off-topic. I read the FAQ and it says it'S OK to ask questions about project management, which includes Publishing. And naming a game is a key aspect to publishing. That's what my question is about - choosing a legal name for my game with the consideration that I might post/publish it.

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• Charakter coding / programming

  - by Jery

  lately I tryed a few times to create charakters for some games, but at some certain point (especially when collision detection came in) everything became messy and the interaction between chars, the world and certain items had a lot of bugs. So here is my question, how do you ussualy keep track of actions that your charakter is allowed to do, or more in general do you have some links / advices how to set up a char efficiantly? I´m working on a char right now, who should at least be able to run, jump, pick items up and use different fighting animations. Most ideas I came up with until now use some kind of action.priority / action.duration system to determain whats possible and what not, or a "action-manager" which defines for every action what is possible from that action on but it all doesnt work that well together =\ thx in advance for some input

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• How do I swap two objects in C# (specifically Mono) without triggering GC?

  - by TenFour04

  I have two array lists. that I want to swap each frame. My question is, does the variable 'temp' need to be a member variable to avoid triggering GC, assuming this method is called on dozens of objects each frame? I'm not creating a new object, just a new reference to an object. public void LateUpdate(){ ArrayList<int> temp = previousFrameCollisions; previousFrameCollisions = currentFrameCollisions; currentFrameCollisions = temp; currentFrameCollisions.clear(); } I've been told there's no reason to make a primitive into a member variable just to avoid GC, so my best guess is that this also applies to object references.

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• Why does my goblin only choose a walk direction once?

  - by Eogcloud

  I'm working on a simpe 2d canvas game that has a small goblin sprite who I want to get pathing around the screen. What I originally tried was a random roll that would choose a direction, the goblin would walk that direction. It didnt work effectively, he sort of wobbled in one spot. Here's my current apporach but he only runs in a rundom direction and doesnt change. What am I doing wrong? Here's all the relevant code to the goblin object and movement. var goblin = { speed: 100, pos: [0, 0], dir: 1, changeDir: true, stepCount: 0, stepTotal: 0, sprite: new Sprite( goblinImage, [0,0], [30,45], 6, [0,1,2,3,2,1], true) }; function getNewDir(){ goblin.dir = Math.floor(Math.random()*4)+1; }; function checkGoblinMovement(){ if(goblin.changeDir){ goblin.changeDir = false; goblin.stepCount = 0; goblin.stepTotal = Math.floor(Math.random*650)+1; getNewDir(); } else { if(goblin.stepCount === goblin.stepTotal){ goblin.changeDir = true; } } }; function update(delta){ healthCheck(); if(isGameOver){ gameOver(); } if(!isGameOver){ updateCharLevel(); keyboardInput(delta); moveGoblin(delta); checkGoblinMovement(); goblin.sprite.update(delta); //update sprites if(mainChar.kills!=0 && bloodReady){ for(var i=0; i<bloodArray.length; i++){ bloodArray[i].sprite.update(delta); } } //collision detection if(collision(mainChar, goblin)) { combatOutcome(combatEvent()); combatCleanup(); } } }; function main(){ var now = Date.now(); var delta = (now - then)/1000; if(!isGameOver){ update(delta); } draw(); then = now; }; function moveGoblin(delta){ goblin.stepCount++; if(goblin.dir === 1){ goblin.pos[1] -= goblin.speed * delta* 2; if(goblin.pos[1] <= 85){ goblin.pos[1] = 86; } } if(goblin.dir === 2){ goblin.pos[1] += goblin.speed * delta; if(goblin.pos[1] > 530){ goblin.pos[1] = 531; } } if(goblin.dir === 3){ goblin.pos[0] -= goblin.speed * delta; if(goblin.pos[0] < 0){ goblin.pos[0] = 1; } } if(goblin.dir === 4){ goblin.pos[0] += goblin.speed * delta* 2; if(goblin.pos[0] > 570){ goblin.pos[0] = 571; } } };

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• Implementing unlockable items on Android

  - by coder_For_Life22

  I know this would be a beginners question (some of you might think) but I would like to know different approaches for this. I have a game with lets say 20 unlockable items, at the main menu I have a button where the user can go to an activity and view the unlockable items. So I would like for it to have a "Locked image" and under it a text telling you what the item is and maybe how to unlock it. What is the best way of going about this? And then when the item is unlocked during the game, maybe put a variable in the shared preference and check at the beginning of the activity with the unlockabled items. Let me know what you guys think. Thanks.

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• Is this too much to ask for a game programming and developing enthusiast? Am I doing this wrong?

  - by I_Question_Things_Deeply

  I have been a computer-fanatic for almost a decade now. I've always loved and wondered how computers work, even from the purest, lowest hardware level to the very smallest pixel on the screen, and all the software around that. That seems to be my problem though ... as I try to write code (I'm pretty fluent at C++) I always sit there enormous amounts of time in front of a text-editor wondering how every line, statement, datum, function, etc. will correspond to every Assembly and machine instruction performed to do absolutely everything necessary for the kernel to allocate memory to run my compiled program, and all of the other hardware being used as well. For example ... I would write cout << "Before memory changed" << endl; and run the debugger to get the Assembly for this, and then try and reverse disassemble the Assembly to machine code based on my ISA, and then research every .dll, library file, linked library, linking process, linker source code of the program, the make file, the kernel I'm using's steps of processing this compilation, the hardware's part aside from the processor (e.g. video card, sound card, chipset, cache latency, byte-sized registers, calling convention use, DDR3 RAM and disk drive, filesystem functioning and so many other things). Am I going about programming wrong? I mean I feel I should know everything that goes on underneath English syntax on a computer program. But the problem is that the more I research every little thing the less I actually accomplish at all. I can never finish anything because of this mentality, yet I feel compelled to know everything... what should I do?

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• CCMoveBy values on update()

  - by Jose M Pan

  Hope you can help me. This is my problem: I have a scheduled update, here I track the movements of my objects (sprites), I move them with CCMoveBy, and I need to constantly update the zOrder. For setting the zOrder I've made a setZOrder(), which it takes the actual position of the sprite. And here is the problem, I get all the X and Y values AFTER the object is in the target. I know I get the values after the object is in the new position because I've made a CCLog. I can read all the values from the sprite, only when it's in the new position, so everything is well sorted only when the objects are not moving. How can I get the CCMoveBy values on every tick update? (or how can I get the CCMoveBy values in "real-time"?) Thanks a lot in advance, Here is an idea of my code. this->schedule(schedule_selector(Game::update)); void Game::update(float dt) { setZOrder(); moveObjects(); } void Game::setZOrder() { //This function takes the X and Y position and the row and column where the sprite is. Is working good. But I'm getting the "move" action values, after the object is in place. } void Game::moveObjects() { for (i=0; i < numChildren; i++) { CCActionInterval* move = CCMoveBy::create(targetPoint, time); object[i]->runAction(move); } }

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• How can I implement a matchmaker?

  - by csiz

  I'm making a multiplayer game, where players are separated in to rooms that would ideally have about 20 players. So I need a few pointers on an algorithm to distribute the players in to these rooms. A few more constraints: When a players gets in to a room, he should stay there until he decides to exit (the room itself changes levels) There may be more room servers, every server should create more rooms until near full capacity There's a central server that manages all the room servers, and directs the players towards their room

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• Can XNA Content Pipeline split one content file into several .xnb?

  - by Zeta Two

  Let's say I have an xml file which looks like this <Weapons> <Weapon> <Name>Pistol</Name> ... </Weapon> <Weapon> <Name>MachineGun</Name> ... </Weapon> </Weapons> Would it be possible to use a custom importer/writer/reader to create two files, Pistol.xnb and MachineGun.xnb which I can load individually with Content.Load()? While writing this I realized I could just import a Weapon[] list and split them up with a helper, but I'm still wondering if this is possible?

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