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  • Fixing LOD gaps, T-junctions

    - by Jaka Jancar
    I'm creating a heightmap renderer. One of the examples for solving gaps when doing LOD I found is this: (from Game Programming Gems 2 - Greg Snook - Simplified Terrain using Interlocking Tiles) Wouldn't this still produce a gap, if the three vertices encircled with red were not co-linear? Shouldn't the middle triangle be split into two, as I marked with the orange line? Am I misunderstanding the problem, or is there a mistake in the example?

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  • What should programmers practice every day?

    - by Jacinda S
    Musicians practice scales, arpeggios, etc. every day before they begin playing "real" music. The top sports players spend time every day practicing fundamentals like dribbling before playing the "real" game. Are there fundamentals that programmers should practice every day before writing "real" code?

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  • How do I obtain a code point integer from a 1 to 4 byte UTF-8 encoded sequence in Windows?

    - by Patrick Niedzielski
    Hello, I am Patrick Niedzielski, a programmer for the Free Software 3D adventure game Humm and Strumm. I'm working on a minimal Unicode character class in C++. I currently have an array of four bytes representing a UTF-8 sequence. On GNU/Linux, I can just convert to UTF-32 with iconv(), but on Windows, I cannot do this. Is it possible to convert the array to a single code point? Thanks, Patrick

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  • Does mixing Quartz and OpenGL-ES cause big performance degrade??

    - by Eonil
    I have a plan to make a game using OpenGL for 3D world view, and CALayer(or UIView) for HUD UI. It's easy to imagine performance degrade from mixing them, but the document which mention this impact disappeared: http://developer.apple.com/iphone/library/technotes/tn2008/tn2230.html I cannot find the document on current version of SDK reference. And I got this document: http://gamesfromwithin.com/gdc-2010-the-best-of-both-worlds-using-uikit-with-opengl If you experienced about this, please let me know about performance impact on current SDK.

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  • Will Python 3.0's backwards-incompatibility affect adoption?

    - by George Stocker
    I visited Slashdot this morning to find out that Python 3.0 has been released. I know C# and Perl, but have wanted to learn Python for some time, especially after I saw its ease of use to create useful tools, not to mention its use in game scripting. My question is, how does the intentionally backwards-incompatible release of Python 3.0 affect adoption, and should I learn Python 2? Or should I take the dive and learn Python 3.0 first, and wait for the libraries to be ported?

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  • From a 3D modeler to an iPhone app - what are best practices?

    - by bonkey
    I am quite new in 3D programming on iPhone and I would like to ask for hints about organizing a work between designers and programmers on that platform. Most of all: what kind of tools, libraries or plugins cooperate the best on both sides. Although I consider the question as looking for general best-practices advice I would like to find a solution for my current situation which I describe further, too. I've already done some research and found following libraries: SIO2 Khronos OpenGL ES 1.x SDK for PowerVR MBX Unity3D Oolong Game Engine I've checked modellers or plugins to them giving output formats readable by those tools: obj2opengl Wavefront OBJ to plain header file converter Blender with SIO2 exporter iphonewavefrontloader Cheetah3D PVRGeoPOD for 3DS / Maya Unfortunately I still have no clear vision how to combine any of that tools to get a desinger's work in an application. I look for a way of getting it in the most possible complete way: models, lights, scenes, textures, maybe some simple animations (but rather no game-like physics), but I still got nothing. And here comes my situation: I would like to find right way to present few (but quite complicated) models from a single scene. The designers mostly use 3DS Max 9, sometimes 10 (which partly prevents using PVRGeoPOD) and are rather reluctant to switch to something else but if there's no other choice I suppose it would be possible. The basic rule I've already found in some places "use Wavefront OBJ" not always works. I haven't got any acceptable results with production files, actually. The only things worked fine were some mere examples. Some of my models did imported incomplete, sometimes exporters hung or generated enormous files not really useful on an iPhone, sometimes enabling textures (with GL_TEXTURE_2D) just crashed an app. I know it might be a problem with too complicated models or my mistakes coming from inexeperience but I am not able to find any guidelines for that process to have streamlined cooperation with designers. I am even willing to write some things from scratch in pure OpenGL-ES if it's necessary, but I would like to avoid what might be avoided and get the most from the model files. The best would be the effect I saw on some SIO2 tutorials: export, build & go. But at that moment I've got only "import, wrong", "import, where are textures?", "import, that almost looks fine, export, hang" and so on... Is it really so much frustrating or I am just missed something obvious? Can anybody share his/her experience in that field and tell what kind of software uses for "making things happen"?

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  • Ruby Abstract Class Design

    - by MattDiPasquale
    I'm creating a video game. It has Characters & Items. Since I want Characters & Items to each have a name, should I make another class called NamedObjects with just a name field and have Characters & Items extend that? Or is that going overboard?

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  • Controller Error: Do I need to worry?

    - by Kryten
    Hi, I have a HP Pavillion dv5224ea Laptop with Windows 7 on it. Recently I discovered a Error in Event Viewer: The driver detected a controller error on \Device\Ide\IdePort1. (more details): - System - Provider [ Name] atapi - EventID 11 [ Qualifiers] 49156 Level 2 Task 0 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2010-03-07T12:43:07.090197600Z EventRecordID 30198 Channel System Computer Alistair-Win7 Security - EventData \Device\Ide\IdePort1 0000100001000000000000000B0004C002000000850100C00000000000000000000000000000000000000000000000000000000004100000 -------------------------------------------------------------------------------- Binary data: In Words 0000: 00100000 00000001 00000000 C004000B 0008: 00000002 C0000185 00000000 00000000 0010: 00000000 00000000 00000000 00000000 0018: 00000000 00001004 In Bytes 0000: 00 00 10 00 01 00 00 00 ........ 0008: 00 00 00 00 0B 00 04 C0 .......À 0010: 02 00 00 00 85 01 00 C0 ......À 0018: 00 00 00 00 00 00 00 00 ........ 0020: 00 00 00 00 00 00 00 00 ........ 0028: 00 00 00 00 00 00 00 00 ........ 0030: 00 00 00 00 04 10 00 00 ........ Event Viewer is recording A LOT of these errors (sometimes 13, one after the other!). Do I need to worry? What does this error mean? What device could "\Device\Ide\IdePort1" be? What is a ATAPI Error? Do I need to re-install Windows? I generally find the occurs when I try to backup my machine (using Windows Backup) or when using a program that uses Volume Shadow Copy. I have run "sfc", no problems. There are no Device Errors in Device Manager. I have also run "vssadmin list writers", no problems. Whats going on??? Would it be a good idea to re-install Windows 7?

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  • What does "prototyping" mean in practice?

    - by prot
    When I recently asked about the uses of Ruby someone told me it was good for prototyping. I basically know what that means, quickly get the very base of your app up and working, see if there are conceptual problems and then add the rest. Am I right with how I understand prototyping? What would be a concrete example of prototyping a Snake game in Ruby or any other language?

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  • Fastest python/C++ multimedia library

    - by Matthew Mitchell
    I'm using pyglet for my OpenGL based game but is it the fastest library out there which has a python wrapper? I could create a C++ extension and use any C++ multimedia library. Are there any C++ libraries that are worth investing time into or is it not worth the extra work? Thank you.

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  • Help: Setup Outgoing Mail Server Only for Multiple Domains Using Postfix?

    - by user57697
    I want an outgoing mail server ONLY for multiple domains. I plan to use Postfix as that seems to be the easiest to setup being very new to Ubuntu/Linux. The setup I plan to have are as follows: I want to use virtual domain with postfix i.e. my multiple websites must be able to send an email from each their respective domains i.e. [email protected] is sent from my domain1.com website and [email protected] is sent from domain2.com website This is an outgoing mail server only i.e. I don't want any returned (or otherwise) email sent to my postfix server. Incoming mail is handled by Google Apps/Gmail and is already setup. I already set my SPF recording to designate my mx records and postfix server ip as valid email servers i.e. "v=spf1 mx include:mydomain.com -all" How can I achieve this? I'm frankly a little confused, so some help would be appreciated. I attempted to follow these guides here, but it doesn't seem right (and it isn't clear what all the settings mean): How to configure Postfix virtual domains http://www.sysdesign.ca/guides/postfix_virtual.html Postfix Installation *.slicehost.com/2008/7/29/postfix-installation Basic Postfix settings (main.cf) *.slicehost.com/2008/7/31/postfix-basic-settings-in-main-cf I can only post one link, but those articles above can be found by replacing * with articles in the hyperlink.

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  • Least CPU intensive way of streaming your screen on windows?

    - by sinni800
    Hello, sometimes I like capturing my screen for others to see. Only thing: I am playing games while I do it. I have tried a few streaming solutions where Windows Media Encoder coupled with my own Windows server appealed to me most, because I can change resolutions, etc. I also tried ustream coupled with the Flash applet and the Adobe Flash Encoder recording a Camtasia source. Camtasia has the disadvantage though that it shows the green-and-black-alternating borders and can not be targeted fullscreen. I like how xfire does it. But it doesn't work with every game, many are simply not supported. A few thoughts about this: Is there a program which captures like Fraps or XFire (based on Direct3D and OpenGL outputs) and exposes the output to a DirectShow source filter? Which brings me to: Is there hardware accelerated capturing directly from the graphics card? Maybe including direct encoding with help from OpenCL? Modern graphic cards decode BluRay content directly for example. I should have a modern enough graphics processor for this to be possible (see below). If using Windows Media Encoder: Which are the least CPU intensive settings? Which codec? Is there a newer codec than Windows Media 9? Is it less CPU intensive? I only have 7, 8 and 9 inside the Encoder Could the performance be massively increased by having a Quad-Core CPU (see below)? Bandwidth is no problem up to 1000 to 1500 kbit/s (I have 2048). My Computer specs: Intel Core 2 Duo E8400 4 GB DDR2-800 Ram Ati Radeon HD5770 Using Windows 7 Professional

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  • Anyone knows which networking package contains winlive.h ?

    - by Reza
    I am dealing with a c++ small game solution which contains references to winlive.h header. I'm sure it is part of a networking package, but haven't been able to track it down. It is not in windows sdk or platform sdk. Anyone may have have seen this before and can point me in the right direction? thanks

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  • does flex use frames?

    - by incrediman
    I'm looking into developing a game using the flex SDK instead of flash. I'm kind of not sure how to start. One question I have - does Flex have a timeline like Flash, with frames etc? Is there a main/root timeline?

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  • Multiple View App shows Blank Screen in Simulator

    - by Brett Coburn
    Hello; I am developing a simple app that first shows a menu screen, and when a button is pressed, a game screen appears. I was able to develop the game screen without any issues, but when I changed the code to first display the menu, the simulator showed a blank screen. I've read all the articles on connecting views with IB but I can't figure this out. Any help would be appreciated. This is my code: // Pong_Multiple_ViewAppDelegate.h // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright __MyCompanyName__ 2010. All rights reserved. // #import <UIKit/UIKit.h> @class MenuViewController; @interface Pong_Multiple_ViewAppDelegate : NSObject <UIApplicationDelegate> { UIWindow *window; MenuViewController *navigationController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet MenuViewController *navigationController; @end // // Pong_Multiple_ViewAppDelegate.m // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright __MyCompanyName__ 2010. All rights reserved. // #import "Pong_Multiple_ViewAppDelegate.h" #import "MenuViewController.h" @implementation Pong_Multiple_ViewAppDelegate @synthesize window; @synthesize navigationController; - (void)application:(UIApplication *)application{ // Override point for customization after application launch [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; } - (void)dealloc { [navigationController release]; [window release]; [super dealloc]; } @end // // MenuViewController.h // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright 2010 __MyCompanyName__. All rights reserved. // #import <UIKit/UIKit.h> #import "GameViewController.h" @interface MenuViewController : UIViewController { GameViewController *gameViewController; IBOutlet UIButton *gameButton; } @property(nonatomic, retain) GameViewController *gameViewController; @property(nonatomic, retain) UIButton *gameButton; -(IBAction)switchPage:(id)sender; @end // // MenuViewController.m // Pong Multiple View // // Created by Brett on 10-05-19. // Copyright 2010 __MyCompanyName__. All rights reserved. // #import "MenuViewController.h" #import "GameViewController.h" @implementation MenuViewController @synthesize gameViewController; @synthesize gameButton; -(IBAction)switchPage:(id)sender{ if (self.gameViewController==nil) { GameViewController *gameView = [[GameViewController alloc]initWithNibName:@"GameView" bundle:[NSBundle mainBundle]]; self.gameViewController= gameView; [gameView release]; } [self.navigationController pushViewController:self.gameViewController animated:YES]; } .... @end My code also includes classes: GameViewController.h, GameViewController.m, and nib files: MenuView.xib, and GameView.xib Thanks, B

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  • How do you solve the 15-puzzle with A-Star or Dijkstra's Algorithm?

    - by Sean
    I've read in one of my AI books that popular algorithms (A-Star, Dijkstra) for path-finding in simulation or games is also used to solve the well-known "15-puzzle". Can anyone give me some pointers on how I would reduce the 15-puzzle to a graph of nodes and edges so that I could apply one of these algorithms? If I were to treat each node in the graph as a game state then wouldn't that tree become quite large? Or is that just the way to do it?

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  • Making a sprite always point to another sprite in XNA

    - by Whitey
    I have a player sprite (playerTexture) and a crosshair sprite (crossTexture) in my game. I need to make the player sprite always face towards the crosshair. Does anyone know how to do this? I have tried doing it myself but the math involved boggles my mind. I know there's a rotation parameter in the spriteBatch.Draw() method but I'm unsure how to use it. Thanks!

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  • How do i rotate a CALayer around a diagonal axis?

    - by Mattias Wadman
    Hi, im trying to implement a flip animation to be used in board game like application. The animation is suppose to look like a game piece that rotate and change to the color of its back. I have managed to get a animation that flips around orthogonal axis, but when i try to flip around a diagonal axis by changing the rotation around the z-axis not surprisingly the actual image also gets rotated. Instead i would like to rotate the image as it is around a diagonal axis. I have tried to change layer.sublayerTransform but with no success. Here is the current implementation. It works by doing a trick to resolve the issue of getting a mirrored image at the end of the animation. The solution is to not actually rotate the layer 180 degrees, instead it rotates it 90 degrees, changes image and then rotates it back. + (void)flipLayer:(CALayer *)layer toImage:(CGImageRef)image withAngle:(double)angle { const float duration = 0.5f; CAKeyframeAnimation *diag = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"]; diag.duration = duration; diag.values = [NSArray arrayWithObjects: [NSNumber numberWithDouble:angle], [NSNumber numberWithDouble:0.0f], nil]; diag.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:1.0f], nil]; diag.calculationMode = kCAAnimationDiscrete; CAKeyframeAnimation *flip = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.y"]; flip.duration = duration; flip.values = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:M_PI / 2], [NSNumber numberWithDouble:0.0f], nil]; flip.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], [NSNumber numberWithDouble:0.5f], [NSNumber numberWithDouble:1.0f], nil]; flip.calculationMode = kCAAnimationLinear; CAKeyframeAnimation *replace = [CAKeyframeAnimation animationWithKeyPath:@"contents"]; replace.duration = duration / 2; replace.beginTime = duration / 2; replace.values = [NSArray arrayWithObjects:(id)image, nil]; replace.keyTimes = [NSArray arrayWithObjects: [NSNumber numberWithDouble:0.0f], nil]; replace.calculationMode = kCAAnimationDiscrete; CAAnimationGroup *group = [CAAnimationGroup animation]; group.removedOnCompletion = NO; group.duration = duration; group.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; group.animations = [NSArray arrayWithObjects:diag, flip, replace, nil]; group.fillMode = kCAFillModeForwards; [layer addAnimation:group forKey:nil]; }

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  • How to get jQuery draggable elements scroll with mb.imageNavigator

    - by bulltorious
    I am using jQuery mb.imageNavigator (1.8) from http://pupunzi.open-lab.com/mb-jquery-components/mb-imagenavigator/ to implements a Risk type game adjucation system. Using the imageNavigator plugin I am able to scroll around a large game map of the world. My issue is when I declare some elements as draggable and drag them onto the map image, their location does not stay relative to where in the picture I put them. They just stay fixed on the screen no matter where I scroll. Does anyone know how to make the the draggable elements scroll with the image? Matteo posts about "you can add an additional content layer that overlay image and moves with it" and posts an example, but I can't make it work. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> ` <head> <script type="text/jscript" src="lib/jquery/jquery-1.3.2.js"> </script> <script type="text/jscript" src="lib/jquery/jquery-ui-1.7.2.custom.min.js"> </script> <script type="text/jscript" src="lib/utilities/mbImgNav.min.js_0.js"> </script> <script type="text/jscript" src="lib/utilities/start.js"> </script> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>New Web Project</title> </head> <body> <div id="AdamsAshTray" style="float:right; background-color:red; z-index:999"> test test test </div> <div id="navArea"> <div imageUrl="someimage" navPosition="BR" navWidth="100" style="display:none;" class="imagesContainer"> <span class="title">zuccheriera</span> <div class="description"> <STRONG>description1</STRONG> </div> </div> </div> </body> $(document).ready(function(){ $("#navArea").imageNavigator({ areaWidth:1820, areaHeight:1000, draggerStyle: "1px dotted red", navOpacity: .8 }) $("#AdamsAshTray").draggable({ grid: [20,20] }); })`

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  • How can I use MPTVOutWindow iPhone undocumented class?

    - by Leg10n
    Hi, I'm an iPhone developer, now I'm developing a game and I just found about the iPhone 2.2 being able to reproduce video on a TV Screen trhough MPTVOutWindow class. After googling I've found a lot of blogs with the News, however none of them give any information on the class, what should I do to implement the class in order to display ouput on the TV?

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  • Java Web Start vs Embedded Java Applet

    - by Matt H
    Hi, I'm going to deploy my Java game to show it to my friends and whatnot, but I'm having trouble deciding between Java Web Start and applets. Under what conditions is one preferable over another and what advantages/disadvantages are there?

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