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• Having trouble's understanding NIF model file format?

  - by NoobScratcher

  I'm attempting too develop a 3rd party application to make it easy to import 3d model part's into my mod for skyrim the plan was to have a fileviewer and preview window of the nif model but since , I don't know what the NIF file format actually is or where to get the vertex data from it or the hole nine yards of parsing a text file in detail I'm at a lost what to do. I'm very good at C++ but not at this super over complicated file formats , id much prefer .obj over the nif file format specification here -- http://niftools.sourceforge.net/doc/nif/index.html If someone could help me in understanding the file format in a natural and simple way and the exact parsing needed to create the 3D Model in the frustum and a explanation on how you figured that out would be happy to know. I use cygwin , notepad++ , win32 7

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• Why do we move the world instead of the camera

  - by sharethis

  I heard that in an OpenGL game what we do to let the player move is not to move the camera but to move the whole world around. For example here is an extract of this tutorial: http://open.gl/transformations In real life you're used to moving the camera to alter the view of a certain scene, in OpenGL it's the other way around. The camera in OpenGL cannot move and is defined to be located at (0,0,0) facing the negative Z direction. That means that instead of moving and rotating the camera, the world is moved and rotated around the camera to construct the appropriate view. Why do we do that?

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• Player rewards in games where you normally have nothing to purchase

  - by PeterK

  In many games there are rewards such as gold coins, points, etc. When these rewards can be used to purchase in-game items, it motivates the player to keep playing. Let's say we have an online game, poker, Yatzy etc. What type of reward would keep the players playing if there are few in-game items available to buy, or none at all? What I am looking for is a reward system that entices the players to play more in a game environment where there isn't that much to purchase. For example, there isn't much to buy in a poker or Yatzy game with the gold you win. I guess having some titles that are added to the userid is one way, or maybe purchasing a logo for the id... A leaderboard is another. Any thoughts on this?

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• XNA: draw a sprite in 3d, is that possible?

  - by Heisenbug

  since now I always used sprited to draw in 2D: spriteBatch.Draw(myTexture, rectangle, color); (I suppose the texture is binded internally to 2 triangles and then scaled.) Now, I'm porting my game in 3D and I have to draw several planes (walls, floor, roof,..). Do I need to manually binding a texture to a geometry (for example using VertexPositionColorTexture with VertexBuffer and IndexBuffer), or is there any simpler way to do that? I'm looking for something like spriteBatch.Draw with the rectangle clip specified in 3d space: spriteBatch.Draw(myTexture, rectangleIn3D, color);

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• 3d js map rendering

  - by gotha

  In the past I've done a 2D tile map using HTML, CSS and Javascript. Now I have the task of creating a 3D version using the same technologies - think of it like a space map where all planets have x/y/z positions. Currently, I have no idea to do this. Is there an existing library or something I can modify to do my job? If not, what method of rendering the map should I use? It needs to be as browser independent as possible, so I can't use webgl, flash or canvas. I'm considering plain JS & HTML or SVG (using Raphael for compatibility).

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• Minecraft mob spawning coding?

  - by Richard

  I recently discovered how to change the game (with MCP) and now I'd like to do my first "big" change to the game, creating new mobs. I already made their skin, the model, the AI and added a new entityID to the mob list. I just need to know how to make them spawn normally under similar conditions to zombies and skeletons. Thanks in advance! :D EDIT: Also, if anyone knows it, post tutorials about minecraft code editing, that would be great.

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• Blender: Having trouble moving vertices

  - by capcom

  I've been using Blender for two days now, and ran into an issue while following a tutorial. Before anything else, I'd like to show you all what my problem precisely is. Here is a short video I uploaded: click here. I thought it may be easier for you all to help me identify and solve my problem more accurately with a visual aid. I would like to emphasize that this issue began to occur after I extruded that trapezoidal region (misstated as a parallelogram in the video). I decided that I did not want the extruded region, and just hit undo. Ever since then, I began to experience the problem you viewed. Thanks.

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• Create Levels using blender

  - by notrodash

  I am creating a game and I have a custom level format for levels in my game. I wanted to know if it is possible to create levels for that kinda format in Blender. My format is XML based and just declares the positions of certain objects. Online I have seen many people use Blender to create levels in their own custom format that blender can understand. How do i get blender to understand my format and use blender to create levels for my game?

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• Dynamically loading modules in Python (+ threading question)

  - by morpheous

  I am writing a Python package which reads the list of modules (along with ancillary data) from a configuration file. I then want to iterate through each of the dynamically loaded modules and invoke a do_work() function in it which will spawn a new thread, so that the code runs in a separate thread. At the moment, I am importing the list of all known modules at the beginning of my main script - this is a nasty hack I feel, and is not very flexible, as well as being a maintenance pain. This is the function that spawns the threads. I will like to modify it to dynamically load the module when it is encountered. The key in the dictionary is the name of the module containing the code: def do_work(work_info): for (worker, dataset) in work_info.items(): #import the module defined by variable worker here... t = threading.Thread(target=worker.do_work, args=[dataset]) # I'll NOT dameonize since spawned children need to clean up on shutdown # Since the threads will be holding resources #t.daemon = True t.start() Question 1 When I call the function in my script (as written above), I get the following error: AttributeError: 'str' object has no attribute 'do_work' Which makes sense, since the dictionary key is a string (name of the module to be imported). When I add the statement: import worker before spawning the thread, I get the error: ImportError: No module named worker This is strange, since the variable name rather than the value it holds are being used - when I print the variable, I get the value (as I expect) whats going on? Question 2 As I mentioned in the comments section, I realize that the do_work() function written in the spawned children needs to cleanup after itself. My understanding is to write a clean_up function that is called when do_work() has completed successfully, or an unhandled exception is caught - is there anything more I need to do to ensure resources don't leak or leave the OS in an unstable state? Question 3 If I comment out the t.daemon flag statement, will the code stil run ASYNCHRONOUSLY?. The work carried out by the spawned children are pretty intensive, and I don't want to have to be waiting for one child to finish before spawning another child. BTW, I am aware that threading in Python is in reality, a kind of time sharing/slicing - thats ok Lastly is there a better (more Pythonic) way of doing what I'm trying to do?

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• Why Android for new (micro) consoles?

  - by Klaim

  There are a lot of new (micro) consoles with Android inside coming soon or already there (OUYA for example). My question is: why use Android and not another OS as base for these consoles? I assume that there are pragmatic answers to this but I can't see any clear killer feature. For example, one can assume that any stable Linux distribution would work (like Valve seem to think). Android is primarily targetted at mobile platforms which mean it is built around the idea of being interrupted which goes against a lot of what console devs needs in new hardware - but is not killing Android as a platform for gamedev either as it's just a constraint. Why not another OS? What's the Android killer features that make micro-console builder using it instead of Linux or anything else?

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• Maya and Game Engines (i.e. Environment Testing)

  - by DiscreteGenius

  What does it mean if I'm designing an environment and I want to test it in the game engine, to see what its like to "run" [or fly] around my environment? I heard an instructor say that exact thing in a Maya training video and I'd like to know more about "How Game Engines and Maya are related to each other." He stated this would be done to see how things look in "size" (e.g. I assume he meant: 'How big is the cathedral, bridge, wall, building, etc.'). I've tried to research such information but it's too complicated, and detailed. I just want a simplistic response to my query. Thanks to everyone willing to help and not criticize my question.

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• Why circles are not created if small?

  - by Suzan Cioc

  I have changed the scale to my own and now I cant create any object, including circle, if it is of the size which is normal for my scale. I am to create big object first and then modify it to smaller size. Looks like minimal size protection is set somewhere. Where? UPDATE While creating a circle, if I drag for 0.04m circle disappears after drag end. If I drag for 0.08m circle also disappears. If I drag for more than 0.1m, circle persists after drag end. How to set so that it persist after 0.01m too?

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• How can I keep track of a battle log on a web game?

  - by Jay W

  Recently I started working on a Web turn-based PvP RPG game. Now I'm working on the battle system but I encountered some issues: How can I keep track of everything that happens in the battle? It should keep track of the characters on the field, inventory, the damage done etc. I first thought I would simply put it in the (MySQL) database, but I think it will be too much. Especially if several people are in a battle. I thought of puting this in sessions or cookies but I don't think thats reliable. Does anyone have an idea how I can do this?

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• What are the advantages to use vector-based fonts over bitmap fonts in (2d) games?

  - by jmp97

  I know that many games are using bitmap fonts. Which are the advantages for vector-based font rendering / manipulation when compared to bitmap fonts and in which scenarios would they matter the most? Prefer a focus on 2d games when answering this question. If relevant, please include examples for games using either approach. Some factors you might consider: amount of text used in the game scaling of text overlaying glyphs and anti-aliasing general rendering quality font colors and styling user interface requirements localisation / unicode text wrapping and formatting cross-platform deployment 2d vs 3d Background: I am developing a simple falling blocks game in 2d, targeted for pc. I would like to add text labels for level, score, and menu buttons. I am using SFML which uses FreeType internally, so vector-based features are easily available for my project. In my view, font sizes in simple games often don't vary, and bitmap fonts should be easier for cross-platform concerns (font-formats and font rendering quality). But I am unsure if I am missing some important points here, especially since I want to polish the looks of the final game.

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• Getting Center and Radius of Irregural Object

  - by Moaz ELdeen

  I have drawn an asteroid object manually , and would like to get its center/radius by a specific equation. I think I can get them by calculated and hard-coded values. The code to draw the asteroid: void Asteroid::Draw() { float ratio = app::getWindowWidth()/app::getWindowHeight(); gl::pushMatrices(); gl::translate(m_Pos*ratio); gl::scale(3.5*ratio,3.5*ratio,3.5*ratio); gl::color(ci::Color(1,1,1)); gl::drawLine(Vec2f(-15,0),Vec2f(-10,-5)); gl::drawLine(Vec2f(-10,-5),Vec2f(-5,-5)); gl::drawLine(Vec2f(-5,-5),Vec2f(-5,-8)); gl::drawLine(Vec2f(-5,-8),Vec2f(5,-8)); gl::drawLine(Vec2f(5,-8),Vec2f(5,-5)); gl::drawLine(Vec2f(5,-5),Vec2f(10,-5)); gl::drawLine(Vec2f(10,-5),Vec2f(15,0)); gl::drawLine(Vec2f(15,0),Vec2f(10,5)); gl::drawLine(Vec2f(10,5),Vec2f(-10,5)); gl::drawLine(Vec2f(-10,5),Vec2f(-10,5)); gl::drawLine(Vec2f(-15,0),Vec2f(-10,5)); gl::popMatrices(); } According to the answer I have written that code to calculate the radius, is it correct or not ? cinder::Vec2f Asteroid::getCenter() { return ci::Vec2f(m_Pos.x, m_Pos.y); } double Asteroid::getRadius() { ci::Vec2f _vec = (getCenter()- Vec2f(15,5)); return _vec.length()*0.3f; }

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• Using texture() in combination with JBox2D

  - by Valentino Ru

  I'm getting some trouble using the texture() method inside beginShape()/endShape() clause. In the display()-method of my class TowerElement (a bar which is DYNAMIC), I draw the object like following: void display(){ Vec2 pos = level.getLevel().getBodyPixelCoord(body); float a = body.getAngle(); // needed for rotation pushMatrix(); translate(pos.x, pos.y); rotate(-a); fill(temp); // temp is a color defined in the constructor stroke(0); beginShape(); vertex(-w/2,-h/2); vertex(w/2,-h/2); vertex(w/2,h-h/2); vertex(-w/2,h-h/2); endShape(CLOSE); popMatrix(); } Now, according to the API, I can use the texture() method inside the shape definition. Now when I remove the fill(temp) and put texture(img) (img is a PImage defined in the constructor), the stroke gets drawn, but the bar isn't filled and I get the warning texture() is not available with this renderer What can I do in order to use textures anyway? I don't even understand the error message, since I do not know much about different renderers.

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• Server costs and back loading for mobile devices

  - by user23844

  A company approached me to design an MMO for the mobile platform and I have the perfect idea for them. My question is how much would a server for a FTP game that has both a PVE element and PVP cost? Also do you think that it would be better or is it even possible to back load the data onto the phones (trying to come up with some interesting way to back up the data in case of emergency). I don't want the game to be totally online reliant (I want to appeal to not only phone users but also iPod touch users) and for there to be an offline mode. If you can't tell this is my first game besides simple projects I've done on the side. Any help would be greatly appreciated.

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• Examples of Android Joystick Controls? [on hold]

  - by KRB

  I can't seem to find any well executed code examples for Android joystick controls. Whatever it may be, algorithms, pseudo code, actual code examples, strategies, or anything to assist with the design and implementation of Android joystick controls; I can't seem to find anything decent on the net. What are some well executed examples? More specifically, Pseudo Code Current Examples Idea/Design Functionality Description Controller Hints Related Directly to Android Architecture What kind of classes will I have making this? Will there be only one? How would this be implemented to the game architecture? All things I am thinking about. Cheers! UPDATE I've found this on the subject Joystick Example1, though I am still looking for different examples/resources. Answered my own question with a link to the code of the above video. It's a fantastic start to Android Joystick Controls.

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• returning correct multiTouch id

  - by Max

  I've spent countless hours on reading tutorials and looking at every question related to multiTouch from here and Stackoverflow. But I just cannot figure out how to do this correctly. I use a loop to get my pointerId, I dont see alot of people doing this but its the only way I've managed to get it somewhat working. I have two joysticks on my screen, one for moving and one for controlling my sprites rotation and the angle he shoots, like in Monster Shooter. Both these work fine. My problem is that when I Move my sprite at the same time as Im shooting, my touchingPoint for my movement is set to the touchingPoint of my shooting, since the x and y is higher on the touchingPoint of my shooting (moving-stick on left side of screen, shooting-stick on right side), my sprite speeds up, this creates an unwanted change in speed for my sprite. I will post my entire onTouch method here with some variable-changes to make it more understandable. Since I do not know where Im going wrong. public void update(MotionEvent event) { if (event == null && lastEvent == null) { return; } else if (event == null && lastEvent != null) { event = lastEvent; } else { lastEvent = event; } int pointerCount = event.getPointerCount(); for (int i = 0; i < pointerCount; i++) { int x = (int) event.getX(i); int y = (int) event.getY(i); int id = event.getPointerId(i); int action = event.getActionMasked(); int actionIndex = event.getActionIndex(); String actionString; switch (action) { case MotionEvent.ACTION_DOWN: actionString = "DOWN"; break; case MotionEvent.ACTION_UP: shooting=false; // when shooting is true, it shoots dragging=false; // when dragging is true, it moves actionString = "UP"; break; case MotionEvent.ACTION_POINTER_DOWN: actionString = "PNTR DOWN"; break; case MotionEvent.ACTION_POINTER_UP: shooting=false; dragging=false; actionString = "PNTR UP"; break; case MotionEvent.ACTION_CANCEL: shooting=false; dragging=false; actionString = "CANCEL"; break; case MotionEvent.ACTION_MOVE: try{ if((int) event.getX(id) > 0 && (int) event.getX(id) < touchingBox && (int) event.getY(id) > touchingBox && (int) event.getY(id) < view.getHeight()){ movingPoint.x = (int) event.getX(id); movingPoint.y = (int) event.getY(id); dragging = true; } else if((int) event.getX(id) > touchingBox && (int) event.getX(id) < view.getWidth() && (int) event.getY(id) > touchingBox && (int) event.getY(id) < view.getHeight()){ shootingPoint.x = (int) event.getX(id); shootingPoint.y = (int) event.getY(id); shooting=true; }else{ shooting=false; dragging=false; } }catch(Exception e){ } actionString = "MOVE"; break; default: actionString = ""; } Wouldnt post this much code if I wasnt at an absolute loss of what I'm doing wrong. I simply can not get a good understanding of how multiTouching works. basicly movingPoint changes for both my first and second finger. I bind it to a box, but aslong as I hold one finger within this box, it changes its value based on where my second finger touches. It moves in the right direction and nothing gives an error, the problem is the speed-change, its almost like it adds up the two touchingPoints.

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• Collision representation in game overworlds

  - by Akroy

  I'm implementing a 2D overworld where one can walk through an area that is not tile based. I was wondering the best way to implement collisions. In the past when I've done similar things, I've used one image (or set of images) to show an elaborately drawn world and then a second binary image that does nothing but differentiate "wall" and "not wall". Then, I'd use the first for all drawing to the screen, but the second for collision detection. Having another image of the same size to represent collisions seems like lots of overhead. Is there a better way to handle this? (I'm currently using C++ with SDL, although I'm more interested in general concepts)

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• Start Game Programming [on hold]

  - by vishalpamnani

  I am 23 and working as a Software Developer. Though my work is entirely based on Java and Advanced Java, I know a very little and all my interest is in developing games. I want to make a my career in Gaming Industry as a Game Programmer. I am not able to figure out the starting step to start with Game Programming. I have zero knowledge with developing games and never ever tried a tiniest of game. Please suggest me from where to start. Which programming language to start with? What should be my practice? What references to use? What type of games to begin with? BTW my preferable language would be C++ ~Thanks

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• How do I add Different Screens to my C#/XNA Game?

  - by Ramses Brown

  I'm working on a Pong clone in XNA. Gameplay-wise, I have it where I want it to be. I want to add a title screen and some other screens to it like a menu, as well as a screen for the Winning/Losing results. I've tried the Game State Management Example on the App Hub site, but It's very complicated and I haven't been able to make sense of it. Is there a simpler way? I'm hoping for a solution that can be used in other projects too. Plus I'd like to know how to actually create menu items (basically, how do I display the different options on it, and highlight them, etc).

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• Check if the vector is behind another or maybe opposite directions?

  - by Gilson

  I'm doing a network game and on the client side, i interpolate the client position with the server sent extrapolated position. The client has its own physics simulation wich is corrected by the server in steps. The problem is when it laggs and i 'kick' the ball, the server gets a delayed message and sends me the position backwards of the client position wich makes the ball goes back and forth. I want to ignore those and maybe compensate that on the server, not sure though. The problem is the clock difference on those case are 0.07ms or 0.10 ms wich isn't that high to ignore the message i guess. When i get the server position, i extrapolate with the clock interval * serverBallVelocity Can i check if my new ball server position is behind my actual ball vector position? I tried to use the dot product after normalized the two vectors to check if they are opposite but it ain't working properly. Any suggestions on checking that?

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• How to program a cutting tool for 3D model in game

  - by Jesse S

  I'm looking for a resource to figure out how to program a function to cut a 3d model in game. Example: Enemy/NPC is sliced into 2 pieces with a sword. His body is not hollow, you can see bloody texture where normally a 'polygon hole' would be. The first step is to actually 'cut/slice' the model, then add in polygons to fill the hole in the model. I know this can be done in 3D modelling software, but I'm not sure how to go about doing this in a game, code-wise. I do not wish to use 'pre cut-up" models, the code will determine where the cut is. Any pointers in the right direction would be greatly appreciated.

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• Increase moving speed of body

  - by Siddharth

  How to move ball speedily on the screen using box2d in libGDX? public class Box2DDemo implements ApplicationListener { private SpriteBatch batch; private TextureRegion texture; private World world; private Body groundDownBody, groundUpBody, groundLeftBody, groundRightBody, ballBody; private BodyDef groundBodyDef1, groundBodyDef2, groundBodyDef3, groundBodyDef4, ballBodyDef; private PolygonShape groundDownPoly, groundUpPoly, groundLeftPoly, groundRightPoly; private CircleShape ballPoly; private Sprite sprite; private FixtureDef fixtureDef; private Vector2 ballPosition; private Box2DDebugRenderer renderer; Vector2 vector2; @Override public void create() { texture = new TextureRegion(new Texture( Gdx.files.internal("img/red_ring.png"))); sprite = new Sprite(texture); sprite.setOrigin(sprite.getWidth() / 2, sprite.getHeight() / 2); batch = new SpriteBatch(); world = new World(new Vector2(0.0f, -10.0f), false); groundBodyDef1 = new BodyDef(); groundBodyDef1.type = BodyType.StaticBody; groundBodyDef1.position.x = 0.0f; groundBodyDef1.position.y = 0.0f; groundDownBody = world.createBody(groundBodyDef1); groundBodyDef2 = new BodyDef(); groundBodyDef2.type = BodyType.StaticBody; groundBodyDef2.position.x = 0f; groundBodyDef2.position.y = Gdx.graphics.getHeight(); groundUpBody = world.createBody(groundBodyDef2); groundBodyDef3 = new BodyDef(); groundBodyDef3.type = BodyType.StaticBody; groundBodyDef3.position.x = 0f; groundBodyDef3.position.y = 0f; groundLeftBody = world.createBody(groundBodyDef3); groundBodyDef4 = new BodyDef(); groundBodyDef4.type = BodyType.StaticBody; groundBodyDef4.position.x = Gdx.graphics.getWidth(); groundBodyDef4.position.y = 0f; groundRightBody = world.createBody(groundBodyDef4); groundDownPoly = new PolygonShape(); groundDownPoly.setAsBox(480.0f, 10f); fixtureDef = new FixtureDef(); fixtureDef.density = 0f; fixtureDef.restitution = 1f; fixtureDef.friction = 0f; fixtureDef.shape = groundDownPoly; fixtureDef.filter.groupIndex = 0; groundDownBody.createFixture(fixtureDef); groundUpPoly = new PolygonShape(); groundUpPoly.setAsBox(480.0f, 10f); fixtureDef = new FixtureDef(); fixtureDef.friction = 0f; fixtureDef.restitution = 0f; fixtureDef.density = 0f; fixtureDef.shape = groundUpPoly; fixtureDef.filter.groupIndex = 0; groundUpBody.createFixture(fixtureDef); groundLeftPoly = new PolygonShape(); groundLeftPoly.setAsBox(10f, 320f); fixtureDef = new FixtureDef(); fixtureDef.friction = 0f; fixtureDef.restitution = 0f; fixtureDef.density = 0f; fixtureDef.shape = groundLeftPoly; fixtureDef.filter.groupIndex = 0; groundLeftBody.createFixture(fixtureDef); groundRightPoly = new PolygonShape(); groundRightPoly.setAsBox(10f, 320f); fixtureDef = new FixtureDef(); fixtureDef.friction = 0f; fixtureDef.restitution = 0f; fixtureDef.density = 0f; fixtureDef.shape = groundRightPoly; fixtureDef.filter.groupIndex = 0; groundRightBody.createFixture(fixtureDef); ballPoly = new CircleShape(); ballPoly.setRadius(16f); fixtureDef = new FixtureDef(); fixtureDef.shape = ballPoly; fixtureDef.density = 1f; fixtureDef.friction = 1f; fixtureDef.restitution = 1f; ballBodyDef = new BodyDef(); ballBodyDef.type = BodyType.DynamicBody; ballBodyDef.position.x = (int) 200; ballBodyDef.position.y = (int) 200; ballBody = world.createBody(ballBodyDef); // ballBody.setLinearVelocity(200f, 200f); // ballBody.applyLinearImpulse(new Vector2(250f, 250f), // ballBody.getLocalCenter()); ballBody.createFixture(fixtureDef); renderer = new Box2DDebugRenderer(true, false, false); } @Override public void dispose() { ballPoly.dispose(); groundLeftPoly.dispose(); groundUpPoly.dispose(); groundDownPoly.dispose(); groundRightPoly.dispose(); world.destroyBody(ballBody); world.dispose(); } @Override public void pause() { } @Override public void render() { world.step(1f/30f, 3, 3); Gdx.gl.glClearColor(1f, 1f, 1f, 1f); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); batch.begin(); vector2 = ballBody.getLinearVelocity(); System.out.println("X=" + vector2.x + " Y=" + vector2.y); ballPosition = ballBody.getPosition(); renderer.render(world,batch.getProjectionMatrix()); // int preX = (int) (vector2.x / Math.abs(vector2.x)); // int preY = (int) (vector2.y / Math.abs(vector2.y)); // // if (Math.abs(vector2.x) == 0.0f) // ballBody1.setLinearVelocity(1.4142137f, vector2.y); // else if (Math.abs(vector2.x) < 1.4142137f) // ballBody1.setLinearVelocity(preX * 5, vector2.y); // // if (Math.abs(vector2.y) == 0.0f) // ballBody1.setLinearVelocity(vector2.x, 1.4142137f); // else if (Math.abs(vector2.y) < 1.4142137f) // ballBody1.setLinearVelocity(vector2.x, preY * 5); batch.draw(sprite, (ballPosition.x - (texture.getRegionWidth() / 2)), (ballPosition.y - (texture.getRegionHeight() / 2))); batch.end(); } @Override public void resize(int arg0, int arg1) { } @Override public void resume() { } } I implement above code but I can not achieve higher moving speed of the ball

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