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  • NPOT texture and video memory usage

    - by Eonil
    I read in this QA that NPOT will take memory as much as next POT sized texture. It means it doesn't give any benefit than POT texture with proper management. (maybe even worse because NPOT should be slower!) Is this true? Does NPOT texture take and waste same memory like POT texture? I am considering NPOT texture for post-processing, so if it doesn't give memory space benefit, using of NPOT texture is meaningless to me. Maybe answer can be different for each platforms. I am targeting mobile devices. Such as iPhone or Androids. Does NPOT texture takes same amount of memory on mobile GPUs?

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  • a flexible data structure for geometries

    - by AkiRoss
    What data structure would you use to represent meshes that are to be altered (e.g. adding or removing new faces, vertices and edges), and that have to be "studied" in different ways (e.g. finding all the triangles intersecting a certain ray, or finding all the triangles "visible" from a given point in the space)? I need to consider multiple aspects of the mesh: their geometry, their topology and spatial information. The meshes are rather big, say 500k triangles, so I am going to use the GPU when computations are heavy. I tried using arrays with vertices and arrays with indices, but I do not love adding and removing vertices from them. Also, using arrays totally ignore spatial and topological information, which I may need studying the mesh. So, I thought about using custom double-linked list data structures, but I believe doing so will require me to copy the data to array buffers before going on the GPU. I also thought about using BST, but not sure it fits. Any help is appreciated. If I have been too fuzzy and you require other information feel free to ask.

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  • Does it make the game more fun when the user is forced to progress thru the levels sequentially rather than letting them pick and play?

    - by BeachRunnerJoe
    Hello. For the first time in my game, I'm stuck with a real design dilemma. I guess that's a good thing ;) I'm building a word puzzle game that has five levels, each with 30 puzzles. Currently, the user has to solve one puzzle at a time before moving to the next. However, I'm finding the user occasionally gets stuck on a puzzle, at which point they can no longer play until they solve it. This is obviously bad because many people will just quit playing the game and delete the app since they get frustrated and can't play any other puzzles until the current puzzle is solved. The only elegant solution I can find to helping the player get unstuck is changing the design of the game to allow the users to pick any puzzle to play at any time. This way, if they get stuck, they can come back to it later and at least they have other puzzles to play in the meantime. It's my opinion, however, that this new flow design doesn't make the game as fun as the original flow design where the player has to complete a puzzle before moving to the next. To me, it's like anything else, when you only have one of something, it's more enjoyable, but when you have 30 of something, it's far less enjoyable. In fact, when I present the user with 30 puzzles to choose from that they need to solve before unlocking the next level, it almost seems as tho I'm making them feel like it's work they have to do. I even had a tester voluntarily tell me that being forced to complete a puzzle before moving to the next is more motivating. My questions are... Do you agree/disagree? Do you have any suggestions for how I can help the player get unstuck? Thanks so much in advance for your thoughts! EDIT: I should mention that I've already considered a few other solutions to helping the user get unstuck, but none of them seem like good ideas. They are... Add more hints: Currently, the user gets two hints per puzzle. If I increase the hint count, it only makes the game more easy and still leaves the possibility of the user getting stuck. Add a "Show Solution" button: This seems like a bad idea because it's my opinion this takes the fun out of the game for many people who would probably otherwise solve the puzzle if they didn't have the quick option to see the solution.

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  • Crash when using Cocos2d

    - by ipodfreak0313
    Sorry about the poor question title, it's just that this seems to big for a title. So here's the dirt: I am making a game (obviously) and I want the enemies to shoot (not necessarily at the player). I want the shoot method to be in the Enemies file, so as not to clutter up my HelloWorldLayer.m file even more. Here's what I'm using right now: HelloWorldLayer.m -(void)addEnemy:(BigAndStrongEnemy *)enemy { enemy = nil; if((arc4random() % 4) == 3) { enemy = [BigAndStrongEnemy enemy]; } else { enemy = [SmallAndFastEnemy enemy]; } if(buffDude.position.y > character.position.y || buffDude.position.y < (character.position.y + 10)) { } int rand = arc4random() % 320; if((arc4random() % 2 == 1)) { [enemy setPosition:ccp(0,rand)]; }else{ [enemy setPosition:ccp(480,rand)]; } [self animateEnemy:enemy]; [self addChild:enemy]; } -(void)animateEnemy:(BigAndStrongEnemy *)enemy2 { float randX = arc4random() % 480; float randY = arc4random() % 320; int rand = arc4random() % 320; CGPoint moveToPoint = CGPointMake(randX, (randY - rand)); [enemies addObject:enemy2]; action = [CCSequence actions: [CCMoveBy actionWithDuration:1 position:ccpMult(ccpNormalize(ccpSub(moveToPoint, enemy2.position)), 75)], [CCMoveBy actionWithDuration:3 position:ccp(buffDude.position.x,buffDude.position.y)], nil]; CCCallFuncO *a = [CCCallFuncO actionWithTarget:self selector:(@selector(shoot:)) object:enemy2]; CCSequence *s = [CCSequence actions:action,a, nil]; CCRepeatForever *repeat = [CCRepeatForever actionWithAction:s]; [enemy2 runAction:repeat]; } And here's the Shoot info from the Enemies class: Enemies.m: -(void)shoot:(id)sender { self = (BigAndStrongEnemy *)sender; [self shoot]; } -(void)spriteMoveFinished:(id)sender { CCSprite *b = (CCSprite *)sender; [self removeChild:b cleanup:YES]; } -(void)shoot { self = [CCSprite spriteWithFile:@"bigAndStrongEnemy.gif"]; CCSprite *b = [CCSprite spriteWithFile:@"bullet.gif"]; b.position = ccp(self.position.x,self.position.y); b.tag = 2; [self addChild:b]; [bullets addObject:b]; CGSize winSize = [[CCDirector sharedDirector] winSize]; CGPoint point = CGPointMake((winSize.width - (winSize.width - self.position.x)),0); [b runAction:[CCSequence actions: [CCMoveBy actionWithDuration:0.5 position:point], [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)], nil]]; } Every time the 3 seconds goes by, the app crashes, and goes to the breakpoint in the CCCallFuncO file. I haven't touched it, is the thing. I am completely confused. Any help is greatly appreciated.

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  • Advantages of Steam Greenlight

    - by ashes999
    Let's assume that I can pick a fairly decent game, build it, and finish it with sufficient chrome plating; let's also assume that I can market it myself to some extent, through my own website. What exactly are the advantages of going through Steam Greenlight? Assuming I can actually get through the process and reach sufficient critical mass to be "Greenlight." Can I really expect a lot more marketing (and sales) if I succeed?

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  • How to ignore collision between two objects

    - by eren_trigger
    I have a player that shoots in the direction that it is facing. However, the shot that is created when I click, also destroys the player. How would I make the shot ignore collision with the player? Or better yet, how to make a shot destroy anything it touches and destroy itself without affecting the player? This is the code that controls collisions: function OnTriggerEnter (col : Collider) { Destroy(col.gameObject); } The shot is a trigger, but the player isn't. Not sure if this changes anything in this case. Thanks in advance. EDIT: http://gfycat.com/TediousAridFeline

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  • Learning C++ but wanting to develop iOS Apps

    - by DiscreteGenius
    I'm a computer engineering student and taking my second programming class. I'm learning C++ using "C++ Primer Plus" 5th edition by Prata. I want to develop for iOS. I understand the main language for Xcode is Objective-C. Am I hurting myself by learning C++ before any other language (notably before my desired lang Objective-C)? There's got to be a reason the university requires C++ to learn as a basis language. Please offer any helpful guidance or how I should go about this. Thanks//

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  • Using Instance Nodes, worth it?

    - by Twitch
    I am making a 2d game where there are various environments with lots and lots of objects. There is a forest scene with like 1200 objects in total(trees mainly), of which around 100 are visible on the camera at any given time, as you move through the level. These are comprised of around 20 different kind of trees and other props. Each object is usually 2-6 triangles with a transparent texture. My developer asked me to replace each object in the scene with a node, and keeping only a minimal amount of actual objects which would be 300+ or so(?), since there are a few modified unique meshes. So he can instantiate the actual objects to keep the game light. Is this actually effective? And if so how much? I 've read about draw calls and such and I suppose that if I combine each texture (10 kinds of trees) in 1 mesh it will have the same effect?

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  • Cube chunk via list ToArray()

    - by Christian Frantz
    I've created a list of vertices that I call for each cube made in my array "cubes". When each cube is create, SetUpVertices is called which is a method that stores the 8 vertices of my cube. At the end of my list creation, I create a vertex buffer, and set the data of the list that contains vertices of all 25 cubes to that vertex buffer, effectively creating a "chunk" of cubes. The problem is that Invalid Operation Exception "The array is not the correct size for the amount of data requested." at the line vertices.ToArray(). I don't have an array for this, as the amount of cubes will be changing and arrays aren't dynamic. What could be the cause of this? for (int x = 0; x < 5; x++) { for (int z = 0; z < 5; z++) { SetUpVertices(); cubes.Add(new Cube(device, new Vector3(x, map[x, z], z), color)); } } vertexBuffer = new VertexBuffer(device, typeof(VertexPositionColor), 8, BufferUsage.WriteOnly); vertexBuffer.SetData<VertexPositionColor>(vertices.ToArray());

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  • Making a clone of Starcraft legal?

    - by user782220
    My question is similar to a previous question. Consider the following clone of Starcraft: Change the artwork, sound, music, change the names of units. However, leave the unit hit points unchanged, unit damage unchanged, unit movement speed unchanged, change ability names but not ability effects. Is that considered illegal? In other words, is copying the unit hit points, damage, etc. considered illegal even if everything else is changed?

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  • Determine how to display a tile based on surrounding tiles

    - by Jsmith
    I have a game engine which generates maps randomly, set on a 2d grid which is composed of 34px square graphical tiles. These tiles can be displayed in any of three ways, wall, corner, and floor(exists in 2 states, passable and impassible), and four directions, north, south, west and east. What I need to do is, based on the tiles around each individual tile, determine which state to display the tile in, e.g. north wall, northeast corner, floor so that when a player alters the map, the tiles around the affected tile adjust themselves to suit(i.e. tunneling). In case it becomes important, all gameobjects are inherited from the same class, whether they be players, NPC's, walls, or items.

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  • LibGDX - SpriteBatch's .draw() method requiring float[]

    - by just_a_programmer
    Please excuse my lack of knowledge with LibGDX, as I have just started learning it. I am going through some simple tutorials, and in one of them, I draw a string onto the screen like so: // the following code is in the main file in the core project folder: // this is in the create() method: private SpriteBatch batch; batch = new SpriteBatch(); // this is in the render() method: batch.draw(batch, "Hello world", 200, 200); I am getting an error saying: The method draw(texture, float[], int, int) in the type SpriteBatch is not applicable for the arguments (SpriteBatch, int, int) So, LibGDX wants a float array to draw instead of a string? Thanks in advance.

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  • What do I need to Mod a Unreal Engine 3 game?

    - by RoadSideWarrior
    what I am looking for is some advise making a mod for a certain game and how I would go about making it. The game I am talking about is Blacklight: Retribution and what I wan't to know is; Is it possible? And if so, what programs will I need? It is an online only game so I was unsure how plausible a mod would be for it. Plus I have never made a video game before, but I do like the game and I wanted to do some things with it. Additionally, this will be my first time making anything video game related so I would appreciate any advise. To expand a bit, I plan to add something simple at first. A mod that would let you spectate another player in the first person. Then I plan do something a bit more complex where I want to make so the game optionally always records you playing (in short intervals most likely or you would run quickly out of memory). After all that is done I would add items, armor, weapons, and maybe make a map or not I am not sure but this in a shell what I hope to do. I don't know much about these things but I am reading anything I can get my hands on. So if this is overly ambitious or just plain out not a possibility any advise on what I should look to instead will be welcomed warmly. Thank you.

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  • Unity3D : Pause Menu - Android

    - by user3666251
    Im making a 2D game for android.I almost completed the game but now I need a pause game option.I added a pause icon on the top right side of the screen.The icon is a gui texture.Here is what I did so far : I made a script which will bring up some buttons (which is not working) and attached it to the GUITexture.This is the script : #pragma strict function OnMouseDown() { Debug.Log("*Pause Menu Opens*"); Time.timeScale = 0; if (GUI.Button(Rect(10,10,100,50),"Restart")); Application.LoadLevel(Application.loadedLevel); if (GUI.Button(Rect(10,60,100,50),"MainMenu")); Application.LoadLevel("MainMenu"); } Now,the problem stands at the part where the buttons won't show up,the game freezes at the first frame but the buttons won't show up.Please,if you can help I would be realy thankful. Thank you. Edit #1 : I just noticed that when I click "Pause" the game freezes and it takes me to the MainMenu.That's because I added the GUIButton which takes you to the main menu.I think the whole script structure is wrong.I also forgot to mention that Im new in scripting/unity. Thank you.

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  • How to detect a touch on transparent area of an image in a (libgdx) stage?

    - by Usman
    Can some one please help to detect a touch on an image which I am using as an actor in a stage. The image is actually a long diagnol brush which has plenty of transparent area. The problem is when I touche the transparent area of the brush image it is also triggering the clicklistener of the image. I need the click listener should only be called when the finger actually touched the visible image not the area which is empty. I am using libgdx-0.9.4 libraries. Here is my simple piece of code. import com.badlogic.gdx.scenes.scene2d.ui.Image; import com.badlogic.gdx.scenes.scene2d.ui.ClickListener; Image brushImg = new Image(ImageCache.getTexture("brush")); brushImg.width = mStage.width()*0.75f; brushImg.height = mStage.height()*0.75f; brushImg.setClickListener(new ClickListener() { @Override public void click(Actor actor, float x, float y) { SoundFactory.play("brush"); }

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  • Unity: Assigning String value in inspector

    - by Marc Pilgaard
    I got an issue with Unity I can't seem to comprehend, and it is possibly very simple: I am trying to write a simple piece of code in JavaScript where a button toggles the activation of a shield, by dragging a prefab with Resources.load("ActivateShieldPreFab") and destroying it again (Haven't implemented that yet). I wish to assign this button through the inspector, so I have created a string variable which appears as intended in the inspector. Though it doesn't seem to register the inspector input, even though I changed the value through the inspector. It only provides the error: "Input Key named: is unknown" When the button name is assigned within the code, there is no issues. Code as follows: var ShieldOn = false; var stringbutton : String; function Start(){ } function Update () { if(Input.GetKey(stringbutton) && ShieldOn != true) { Instantiate(Resources.load("ActivateShieldPreFab"), Vector3 (0, 0, 0), Quaternion.identity); ShieldOn = true; } } Hope somebody can help, in advance... Thanks

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  • 2D XNA Game Engine with a Good Wiki [closed]

    - by gcx
    I'm a newbie game developer. I'm planning to develop a XBOX (with a Kinect to double the fun) game. I've researched some 2D game engines that i can use in my project. After some research I've found IceCream engine and it looks delicious with its Milkshake editor. But I can't seem to find "working" game source examples for that engine and its own website's tutorial is not very sufficent. (If you are familiar with this engine) do you know any community that has helpful resources for this particular engine? If not, which engines do you recommend (that has a great wiki) for a XNA based XBOX - Kinect game?

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  • Need a good quality bitmap rotation algorithm for Android

    - by Lumis
    I am creating a kaleidoscopic effect on an android tablet. I am using the code below to rotate a slice of an image, but as you can see in the image when rotating a bitmap 60 degrees it distorts it quite a lot (red rectangles) – it is smudging the image! I have set dither and anti-alias flags but it does not help much. I think it is just not a very sophisticated bitmap rotation algorithm. canvas.save(); canvas.rotate(angle, screenW/2, screenH/2); canvas.drawBitmap(picSlice, screenW/2, screenH/2, pOutput); canvas.restore(); So I wonder if you can help me find a better way to rotate a bitmap. It does not have to be fast, because I intend to use a high quality rotation only when I want to save the screen to the SD card - I would redraw the screen in memory before saving. Do you know any comprehensible or replicable algorithm for bitmap rotation that I could programme or use as a library? Or any other suggestion? EDIT: The answers below made me think if Android OS had bilinear or bicubic interpolation option and after some search I found that it does have its own version of it called FilterBitmap. After applying it to my paint pOutput.setFilterBitmap(true); I get much better result

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  • Building dynamic bounding box hierachies.

    - by adivasile
    I've been reading about collision detection and I saw that the first part was a coarse detection which generates possible contacts using bounding box hierarchies. I understand the concept of splitting up your objects in groups, to speed up the detection phase, but I'm a little confused on how do you actually build the hierachy, more so on what criteria is used to group them together. Do I iterate through all the objects in the scene, and check the distance between them to see where they should be inserted in the tree? Do you know some resources that may shed some light on this topic for me?

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  • How do you handle animations that are for transitioning between states?

    - by yaj786
    How does one usually handle animations that are for going between a game object's states? For example, imagine a very simple game in which a character can only crouch or stand normally. Currently, I use a custom Animation class like this: class Animation{ int numFrames; int curFrame; Bitmap spriteSheet; //... various functions for pausing, returning frame, etc. } and an example Character class class Character{ int state; Animation standAni; Animation crouchAni; //... etc, etc. } Thus, I use the state of the character to draw the necessary animation. if(state == STATE_STAND) draw(standAni.updateFrame()); else if(state == STATE_CROUCH) draw(crouchAni.updateFrame()); Now I've come to the point where I want to draw "in-between" animations, because right now the character will just jump immediately into a crouch instead of bending down. What is a good way to handle this? And if the way that I handle storing Animations in the Character class is not a good way, what is? I thought of creating states like STATE_STANDING_TO_CROUCHING but I feel like that may get messy fast.

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  • Where to hire a scenario writer for a small interactive story game?

    - by Alexander Gladysh
    I need a scenario for a small dialog-based game / interactive story. The game would be used as an example for a middleware tool we're developing. I would like to buy an existing story (it should be dynamic of course — with branching dialogs etc.), or hire someone to write a new one. Please advise, where to go to find such person / service? We're based in Russia, so getting a talented enough native English writer locally is a bit of a problem. Update: To be extra clear: We must get all necessary rights to reuse the story and make a derived work (i.e. the game we're talking about) from it. This is a commercial product. Borrowing someone else's work at random and using it just not going to work.

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  • How to get xy coordinates along a given path

    - by netbrain
    Say i have two points (x,y), (0,0) and (10,10). Now i wan´t to get coordinates along the line by stepping through values of x and y. I thought i solved it with the following functions: fy = startY + (x - startX) * ((destY-startY)/(destX-startX)); fx = (y + startY) / ((destY-startY)/(destX-startX)) + startX; taken from http://en.wikipedia.org/wiki/Linear_interpolation However, it seems that im getting a problem when destX and startX is the same value, so you get division by zero. Is there a better way of getting coordinates along a line when knowing the start and endpoint of the line?

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  • OpenGL Application displays only 1 frame

    - by Avi
    EDIT: I have verified that the problem is not the VBO class or the vertex array class, but rather something else. I have a problem where my vertex buffer class works the first time its called, but displays nothing any other time its called. I don't know why this is, and it's also the same in my vertex array class. I'm calling the functions in this order to set up the buffers: enable client states bind buffers set buffer / array data unbind buffers disable client states Then in the draw function, that's called every frame: enable client states bind buffers set pointers unbind buffers bind index buffer draw elements unbind index buffer disable client states Is there something wrong with the order in which I'm calling the functions, or is it a more specific code error? EDIT: here's some of the code Code for setting pointers: //element is the vertex attribute being drawn (e.g. normals, colors, etc.) static void makeElementPointer(VertexBufferElements::VBOElement element, Shader *shade, void *elementLocation) { //elementLocation is BUFFER_OFFSET(n) if a buffer is bound switch (element) { .... glVertexPointer(3, GL_FLOAT, 0, elementLocation); //changes based on element .... //but I'm only dealing with } //vertices for now } And that's basically all the code that isn't just a straight OpenGL function call.

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  • Proper method to update and draw from game loop?

    - by Lost_Soul
    Recently I've took up the challenge for myself to create a basic 2d side scrolling monster truck game for my little brother. Which seems easy enough in theory. After working with XNA it seems strange jumping into Java (which is what I plan to program it in). Inside my game class I created a private class called GameLoop that extends from Runnable, then in the overridden run() method I made a while loop that handles time and such and I implemented a targetFPS for drawing as well. The loop looks like this: @Override public void run() { long fpsTime = 0; gameStart = System.currentTimeMillis(); lastTime = System.currentTimeMillis(); while(game.isGameRunning()) { currentTime = System.currentTimeMillis(); long ellapsedTime = currentTime - lastTime; if(mouseState.leftIsDown) { que.add(new Dot(mouseState.getPosition())); } entities.addAll(que); game.updateGame(ellapsedTime); fpsTime += ellapsedTime; if(fpsTime >= (1000 / targetedFPS)) { game.drawGame(ellapsedTime); } lastTime = currentTime; } The problem I've ran into is adding of entities after a click. I made a class that has another private class that extends MouseListener and MouseMotionListener then on changes I have it set a few booleans to tell me if the mouse is pressed or not which seems to work great but when I add the entity it throws a CME (Concurrent Modification Exception) sometimes. I have all the entities stored in a LinkedList so later I tried adding a que linkedlist where I later add the que to the normal list in the update loop. I think this would work fine if it was just the update method in the gameloop but with the repaint() method (called inside game.drawGame() method) it throws the CME. The only other thing is that I'm currently drawing directly from the overridden paintComponent() method in a custom class that extends JPanel. Maybe there is a better way to go about this? As well as fix my CME? Thanks in advance!!!

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  • Best practice for organizing/storing character/monster data in an RPG?

    - by eclecto
    Synopsis: Attempting to build a cross-platform RPG app in Adobe Flash Builder and am trying to figure out the best class hierarchy and the best way to store the static data used to build each of the individual "hero" and "monster" types. My programming experience, particularly in AS3, is embarrassingly small. My ultra-alpha method is to include a "_class" object in the constructor for each instance. The _class, in turn, is a static Object pulled from a class created specifically for that purpose, so things look something like this: // Character.as package { public class Character extends Sprite { public var _strength:int; // etc. public function Character(_class:Object) { _strength = _class._strength; // etc. } } } // MonsterClasses.as package { public final class MonsterClasses extends Object { public static const Monster1:Object={ _strength:50, // etc. } // etc. } } // Some other class in which characters/monsters are created. // Create a new instance of Character var myMonster = new Character(MonsterClasses.Monster1); Another option I've toyed with is the idea of making each character class/monster type its own subclass of Character, but I'm not sure if it would be efficient or even make sense considering that these classes would only be used to store variables and would add no new methods. On the other hand, it would make creating instances as simple as var myMonster = new Monster1; and potentially cut down on the overhead of having to read a class containing the data for, at a conservative preliminary estimate, over 150 monsters just to fish out the one monster I want (assuming, and I really have no idea, that such a thing might cause any kind of slowdown in execution). But long story short, I want a system that's both efficient at compile time and easy to work with during coding. Should I stick with what I've got or try a different method? As a subquestion, I'm also assuming here that the best way to store data that will be bundled with the final game and not read externally is simply to declare everything in AS3. Seems to me that if I used, say, XML or JSON I'd have to use the associated AS3 classes and methods to pull in the data, parse it, and convert it to AS3 object(s) anyway, so it would be inefficient. Right?

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