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• How to make an Image still when at position at Slick 2D?

  - by SystemNetworks

  For example, I want to put a building down. if I press 2, it will show the building near the character and it is moving with my character. I have done that. Now I wanted to know how do i put it down and stop following my character? I have something called shiftX and shiftY (Which is the position of my character) And my character looks like it is moving because the map and images itself is moving which i call, probePositionX and probePositionY.

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• How to have the game world get rendered on just a part of the screen?

  - by VictorB

  I am implementing a game on both Desktop and Android. The Desktop version will just rely on the keyboard to handle the user input on the game screen, whilst the Android one will have to have a set of buttons placed in a bar at the bottom of the game screen, using a Stage. Consequently, I am expecting the game world to take up the entire space available on the Desktop screen, whilst on Android it should expand to the entire width of the screen, and to the screen height minus the height of the buttons bar I've mentioned. What would be an appropriate approach of handling space sharing between the game world and the buttons bar? Thank you.

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• Can I randomly generate an endless road?

  - by y26jin

  So suppose we stand on a position(x0, y0) of a map. We can only move on the horizontal plane(no jump and stuff) but we can move forward, left, or right (in a discrete math way, i.e. integer movement). As soon as we move to the next position(x1, y1), everything around us is generated randomly by a program. We could be surrounded by one of mountain, lake, and road. We can only move on the road. The road is always 2D as the map itself. My question is, are we able to play this game endlessly? "End" means that we come across a dead end and the only way out is to go backward.

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• Action Script 3.0 datatype to match C++ iterator? (Code convertion)

  - by user919496

  I am developing a game with Action Script 3.0 using Starling Framework, converting it from C++ C++ Code : for (std::vector<MyObject*>::iterator i = m_listEnemy->begin();i!= m_listEnemy->end();) { (*i)->update(dt); if ( (*i)->m_Hp <=0 ) { (*i)->release(); i = m_listEnemy->erase(i); continue; } i++; } MyObject is the class. What Action Script 3.0 data type matches the C++ iterator? Also , how can I convert this C++ code to Action Script 3.0 code? Thanks in advance!

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• Disposing of ContentManager increases memory usage

  - by Havsmonstret

  I'm trying to wrap my head around how memory management works in XNA 4.0 I've created a screen management test and when I close a screen, the ContentManager created by that screen is unloaded. I have used ANTS Memory Manager to look at how the memory usage is altered when I do this, and it gives me some results which makes me scratch my head. The game starts with loading two textures (435kB and 48,3kB) which puts the usage at about 61MB. Then, when I delete the screen and runs Unload on the ContentManager, the memory usage drops to 56,5MB but instantly after goes up to 64,8MB. Am I doing something wrong or is this usual for XNA games? Do I have to dispose of everything the ContentManager loads seperatly or do I need to do something more to the ContentManager? Thanks in advance!

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• Attach my sprite with Box2d

  - by user919496

  I'm coding Javascript(HTML5) with Box2D. And I want to ask how to attach Sprite with Box2D. This is function My sprite: function My_Sprite() { this.m_Image = new Image(); this.m_Position = new Vector2D(0,0); this.m_CurFrame = 0; this.m_ColFrame = 0; this.m_Size = new Vector2D(0,0); this.m_Scale = new Vector2D(0,0); this.m_Rotation = 0; } My_Sprite.prototype.constructor = function (_Image_SRC) { this.m_Image.src = _Image_SRC; } My_Sprite.prototype.constructor = function (_Image_SRC,_Size,_Col) { this.m_Image.src = _Image_SRC; this.m_Size = _Size; this.m_ColFrame = _Col; this.m_Scale = new Vector2D(1, 1); } My_Sprite.prototype.Draw = function (context) { context.drawImage(this.m_Image, this.m_Size.X * (this.m_CurFrame % this.m_ColFrame), this.m_Size.Y * parseInt(this.m_CurFrame / this.m_ColFrame), this.m_Size.X, this.m_Size.Y, this.m_Position.X, this.m_Position.Y, this.m_Size.X * this.m_Scale.X, this.m_Size.Y * this.m_Scale.Y ); } and this is function Object : function Circle(type, angle, size) { // Circle.prototype = new My_Object(); // Circle.prototype.constructor = Circle; // Circle.prototype.parent = My_Object.prototype; this.m_den = 1.0; this.m_fri = 0.5; this.m_res = 0.2; fixDef.density = this.m_den; fixDef.friction = this.m_fri; fixDef.restitution = this.m_res; fixDef.shape = new b2PolygonShape; bodyDef.type = type; bodyDef.angle = angle; bodyDef.userData = m_spriteCircle; fixDef.shape = new b2CircleShape( Radius / SCALE //radius ); this.m_Body = world.CreateBody(bodyDef); this.m_Body.CreateFixture(fixDef); m_spriteCircle = new My_Sprite(); this.Init(); } Circle.prototype.Init = function () { m_spriteCircle.constructor("images/circle.png", new Vector2D(80, 80), 1); m_spriteCircle.m_CurFrame = 0; } Circle.prototype.Draw = function (context) { m_spriteCircle.Draw(context); } and I draw it : var m_Circle = new Circle(); m_Circle.Draw(context);

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• How to get "Friends who like/play games" list (similar to Farmville 2)

  - by FBAppDev

  I'm working on a Facebook app, and I'm trying to get a friends list similar to Farmville 2. They have a "friends who like games" list. My first thought is, I can get a list of all friends, then for each friend, see if they like any pages with type == "GAMES/TOYS". But ideally, I would like to get the list in one query (not by making one graph API or FQL request per friend). Is this possible, and if so, how?

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• 2d array permutation proof [migrated]

  - by FGM

  I want to know if it's possible to get any possible combination of a 4x4 integer array given three rules: you may shift any column up or down you may shift any row left or right you may shift the entire array left, right, up, or down That is, you can transform: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] into any possible combination of a 4x4 array of the same 16 values, given those three rules. Basically, I just want to know if there are impossible combinations.

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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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• Letting the user draw a Polygon Body and Image

  - by Siddharth

  In my game, I want to provide the user with a drawing feature. By free hand drawing, the user creates a polygon shape. Then, in my game implementation, I have to create a body for the found vertices and generate an image based on that polygon shape. My problem is how to create an image that matches the user-provided vertices. I've heard that cocos2d has something called Image Masking. I don't understand how I could implement it in AndEngine. Could someone help?

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• melonJS: Entity and solid block on collision layer

  - by Arthur Halma

  Actually I have my player entity with 64x64 sprite animation and 18x60 hitbox also the map is maded by 16x16 tiles. When my player goes some way he can pass through blocks (but not all of them). For example there are 4 situations: Good (player can't pass the tile with isSolid property on collision layer) Good (player can't pass the tile with isSolid property on collision layer) Bad (player pass the tile with isSolid property on collision layer) Bad (player pass the tile with isSolid property on collision layer) Looks like melonJS checks only corners of hitbox instead of whole rectangle. Can anyone help me in this situation.

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• In some games, we just let the main() loop be the Player object or Table object?

  - by ????

  I was thinking that let's say if there is a game of Blackjack or MasterMind, then we should have a class called Dealer or ComputerPal, which is how the computer interact with us (as a dealer for Blackjack or as the person giving hints for MasterMind). And then there should be a Player object, and the way to play one game is aPlayer.playGame but I noticed that a book was just using the main() loop to act as the player (or as the Controller of the game), calling the Dealer methods to dealer the cards, ask for player's action, etc... 1) Is this just a lazy way to model all the proper objects? 2) If more objects are to be added, who should call the aDealer.dealCards and then ask for aPlayer.askForAction? (because it is strange to let the Player handle all the logical steps). Should there be a Table object that handle all these logic and then to play one round of game, use aTable.playGame? What is a good object design for such game?

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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 I create a rectangular SDL surface filled with a particular color?

  - by user3689

  I'm learning SDL. I'd like to create rectangular surface filled with a flat color (not an image). Below is my code -- it compiles fine, but doesn't work. I'm passing the function these parameters: SDL_Surface* m_screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE ); SDL_FillRect( m_screen, &m_screen->clip_rect, SDL_MapRGB(m_screen->format,0xFF, 0xFF, 0xFF) ); ... Button button(m_screen,0,0,50,50,255,0,0) ... ... Button::Button(SDL_Surface* screen,int x,int y,int w,int h,int R, int G, int B) { SDL_Rect box; SDL_Surface * ButtonSurface; ButtonSurface = NULL ; Uint32 rmask, gmask, bmask, amask; #if SDL_BYTEORDER == SDL_BIG_ENDIAN rmask = 0xff000000; gmask = 0x00ff0000; bmask = 0x0000ff00; amask = 0x000000ff; #else rmask = 0x000000ff; gmask = 0x0000ff00; bmask = 0x00ff0000; amask = 0xff000000; #endif box.x = x; box.y = y; box.w = w; box.h = h; ButtonSurface = SDL_CreateRGBSurface(SDL_SWSURFACE, box.w,box.h, 32, rmask, gmask, bmask, amask); if(ButtonSurface == NULL) { LOG_MSG("Button::Button Button failed"); } SDL_FillRect(screen,&box,SDL_MapRGB ( ButtonSurface->format, R, G, B )); //ut.ApplySurface(0,0,ButtonSurface,screen); SDL_BlitSurface(ButtonSurface,NULL,screen,&box); } What am I doing wrong here?

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• Settlers-like terrain representation

  - by Olle

  Remember this beauty? I'm playing it now on my old Amiga 1200. My question is: How do you think they represented the terrain, data structure wise? Obviously it's some kind of points, with a height. Or hexagons. And how did they decide which dots were buildable? EDIT: I could rephrase the question to say "how do I achieve this kind of terrain", but I would still only be interested in how to do it on a machine with 1 MB of RAM and a 7 Mhz processor, because this is the machine i currently developing games for. If that seems like a vague or meaningless question to you, that's alright, but I'm still curious if someone has any knowledge about this.

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• Showing range on hexagonal grid

  - by user23673

  Here is the situation. I have hexagonal board,and a unit on it,with speed or move value 4.Diffrent terrain has a diffrent cost.When i click on the unit,game should show me a move range. My solution was to check each hex in range of 4,with A* pathfinding,and if path cost was less than 4 then this hex was in range.Finally game nicely show me range of that unit. My question is: Is there other solution to search for range on hex grids or square grid,because even if i am really proud of what i did in my solution,i think,it is a little to exaggerated?:)) What make me ask this question?I noticed that when unit speed is 4 or 6 or even 8,time to computing range for my computer was really good,but when speed was 10 and more i noticed that i needed to wait few second to compute.Well in real games i rather dont see something like this and my A* pathfinding is rather well optimized,so im thinking that my solution is wrong. Thanks for any replies.

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• How do I correctly multiply an XMMATRIX by a scalar?

  - by user43129

  Using DirectXMath and its XMMATRIX structure in C++ and Direct X 11, how does one multiply that matrix structure by a single float scalar? I want to implement the operation B = A * f; where A and B are XMMATRIX and f is a float. I found all sorts of functions to multiply a matrix by another matrix or a vector. I found all sorts of functions to construct matrices. I could find no scalar multiplication! Why is there no such function? Is there no use case? Did I miss something? How do I implement scalar multiplication?

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• Transforms in Box2D

  - by user1264811

  I'm attempting to implement a camera in my game. I had it working for regular objects, but I began using Box2D and obviously things changed a bit. I have a Body object that I want to draw at the center of the screen. Basically what I'm doing is subtracting the viewportX and viewportY to the Body. I use this code that currently is not working as it should: public void paint(Graphics2D g, int viewportX, int viewportY) { Transform xf = new Transform(); // m_body is the Body object xf.set(m_body.getTransform()); // Here what I attemp to do is take the transform and alter it // by the viewportX and Y, which is something like **-240, -150**. // Why is it negative? Because an object has coordinates 500, 300 would be displayed // at 160, 150 when the subtraction is done. // With the DrawUtils.toScale(), it's just how I convert the units from JBox2D units // to my units. Vec2 v = Transform.mulTrans(xf, new Vec2(DrawUtils.toScale(-viewportX), DrawUtils.toScale(-viewportY))); // Set the new transform to the new vector. Keep the old angle. xf.set(v, xf.q.getAngle()); g.setColor(Color.white); // I know for a fact that the following method works 100%. It correctly displays // my object, just that it doesn't follow it. for (Fixture f = m_body.getFixtureList(); f != null; f = f.getNext()) DrawUtils.drawShape(f, xf); } Hopefully I didn't over comment this and you understand my problem. I don't want to alter the actual physics position of the object, I just want to display it in the center.

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• Dynamic object creation with HashMap

  - by Salor

  I want to use a HashMap to dynamically create objects based on the key. I have a Random Map Generator that stores the maps in 3D Arrays of Type Integer[][][]. Upon creation of the actual map I iterate through this array and based on the Integer I want to create the right block. Example: Integer[][][] map ... map[6][6][6] = 3; 3 is a Earth-Block and now I want to initialize a new Block of this type and give it the right coordinates. Currently I store my Bindings from Integer to Class in a HashMap(Integer, String) and create my objects like that: int id = array[x][y][z]; String block_name = Blocks.map.get(id); Block block = (Block) Class.forName(block_name).newInstance(); block.setPosition(x,y,z); But I want to avoid newInstance() if possible. I've never worked that dynamically with Java before and I couldn't find a solution like changing the HashMap to (Integer, Class) or something. I just need to create a new Object based upon the Integer. Any ideas/solutions? Thanks in advance and have a wonderful day!

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• Representing a world in memory

  - by user9993

  I'm attempting to write a chunk based map system for a game, where as the player moves around chunks are loaded/unloaded, so that the program doesn't run out of memory by having the whole map in memory. I have this part mostly working, however I've hit a wall regarding how to represent the contents of each chunk in memory because of my so far limited understanding of OOP languages. The design I have currently has a ChunkManager class that uses a .NET List type to store instances of Chunk classes. The "chunks" consist of "blocks". It's similar to a Minecraft style game. Inside the Chunk classes, I have some information such as the chunk's X/Y coordinate etc, and I also have a three dimensional array of Block objects. (Three dimensional because I need XYZ values) Here's the problem: The Block class has some basic properties, and I had planned on making different types of blocks inherit from this "base" class. So for example, I would have "StoneBlock", "WaterBlock" etc. So because I have blocks of many different types, I don't know how I would create an array with different object types in each cell. This is how I currently have the three dimensional array declared in my Chunk class: private Block[][][] ArrayOfBlocks; But obviously this will only accept Block objects, not any of the other classes that inherit from Block. How would I go about creating this? Or am I doing it completely wrong and there's a better way?

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• How to obtain a camera stream from Unity without rendering it to the player's screen?

  - by aiguy

  I'd like to stream the output of two cameras to a separate process. Right now, it looks like the best way to do that is to grab the rendered camera views from the screen via platform specific screen capture hooks then compress them real time with h.264. Is there a way to grab the input of the cameras within unity and avoid rendering them to the screen? One solution I'm considering involves using Unity's multiplayer capability to run the game on a separate machine and grab it from that screen buffer, unbeknownst to the player.

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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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• Get all triangles that are < N dist from you?

  - by CyanPrime

  Does anyone know of a way I could add a radius to this code for p? Like basically saying "this is true if the triangle is < N dist from the point" public boolean isPointInTriangle( Vector3f p, Vector3f a, Vector3f b, Vector3f c ) { return ( pointsAreOnSameSide(p, a, b, c) && pointsAreOnSameSide(p, b, a, c) && pointsAreOnSameSide(p, c, a, b) ); } public boolean pointsAreOnSameSide( Vector3f p1, Vector3f p2, Vector3f a, Vector3f b ) { Vector3f diffba = new Vector3f(0,0,0); Vector3f.sub( b, a, diffba ); Vector3f diffp1a = new Vector3f(0,0,0); Vector3f.sub( p1, a, diffp1a ); Vector3f diffp2a = new Vector3f(0,0,0); Vector3f.sub( p2, a, diffp2a ); Vector3f cross1 = Vector3f.cross(diffba, diffp1a); Vector3f cross2 = Vector3f.cross(diffba, diffp2a); return ( Vector3f.dot( cross1, cross2 ) >= 0 ); }

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• Bubble sorting my array does not sort it

  - by Trixmix

  I sort an array of chunks by doing this: for (int i =0; i<this.getQueue().size();i++) { for (int j =0; j<this.getQueue().size()-i-1;j++) { Chunk temp1 = this.getQueue().get(i); Chunk temp2 = this.getQueue().get(i+1); if (temp1 != null &&temp2 != null && temp2.getLocation().getY() < temp1.getLocation().getY()) { this.getQueue().set(i, temp2); this.getQueue().set(i+1, temp1); } } } What I want is the the chunks with the lowest Y coordinate will be at the start of the array and the ones with the bigger Y coordinate will be at the end of the array. And this is my result: 1024.0 944.0 1104.0 944.0 1104.0 ----BEFORE----- 944.0 1024.0 944.0 1104.0 1104.0 ---AFTER--- Why is this not working It seams fine. I dont want to use a comparator so dont suggest it. More info, the Y cords are floats. I got the result by for each looping on this queue and printed the Y locations.

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• Can you run OpenGL 2.0 on modern machines?

  - by thePalindrome

  I'm looking to get into 3d with OpenGL, using SDL to help with other stuff. I found plenty of good tutorials (lazyfoo is a big one), but "Learning Modern 3d Graphics Programming" uses a newer version of openGL that I'm not able to run! I opened up OpenGL extensions viewer, and I can only run OpenGL 2.0, whereas most tutorials are in higher versions. I ask this because I've heard that just about everything in 2.* got depreciated in the newer versions, so I'm worried that my code might not work. I'm looking at a few other tutorials, but I'm so used to SDL that those just confuse me... So should I bother trying to do graphics programming now, or should I just wait until I can upgrade my computer?

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