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• Using Prism with Ninject

  - by stiank81

  Is anyone out there using the Prism framework with Ninject instead of Unity? I need some functionality Unity isn't supporting yet, and I've decided to switch the IoC container to Ninject. I'm struggling a bit with the replace though.. What I need to use from Prism is the EventAggregator and the RegionManager. I have seen this sample that actually does the replace, but this is written for an older version of Prism, and several of the classes seems to have changed etc. So I ended up all confused after looking doing some effort in trying to rewrite it. So - my question is basically: How can I replace Unity with Ninject? What are the necessary steps? Initially I assumed I could write a simple bootstrapper that creates and configures a Ninject container and uses this to resolve all other objects. I bind IEventAggregator to EventAggregator and IRegionManager to RegionManager, but it fails when creating the Shell and the RegionManager.CreateRegion is called. Problem is that it seems like I need to set a ServiceLocator somewhere as it fails on this line: IServiceLocator locator = ServiceLocator.Current; Any ideas and tips along the way?

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• Why calling Process.killProcess(Process.myPid()) is a bad idea?

  - by Tal Kanel

  I've read some posts saying using this method is "not good", shouldn't been use, it's not the right way to "close" the application and it's not how android works... I understand and accept the fact that Android OS knows better then me when it's the right time to terminate the process, but I didn't heard yet a good explanation why it's wrong using the killProcess() method?. after all - it's part of the android API... what I do know is that calling this method while other threads doing in potential an important work (operations on files, writing to DB, HTTP requests, running services..) can be terminated in the middle, and it's clearly not good. also I know I can benefit from the fact that "re-open" the application will be faster, cause the system maybe still "holds" in memory state from last time been used, and killProcess() prevents that. beside this reason, in assumption I don't have such operations, and I don't care my application will load from scratch each run, there are other reasons why not using the killProcess() method? I know about finish() method to close an Activity, so don't write me about that please.. finish() is only for Activity. not to all application, and I think I know exactly why and when to use it... and another thing - I'm developing also games with the Unity3D framework, and exporting the project to android. when I decompiled the generated apk, I was very suprised to find out that the java source code created from unity - implementing Unity's - Application.quit() method, with Process.killProcess(Process.myPid()). Application.quit() is suppose to be the right way to close game according to Unity3d guides (is it really?? maybe I'm wrong, and missed something), so how it happens that the Unity's framework developers which doing a very good work as it seems implemented this in native android to killProcess()? anyway - I wish to have a "list of reasons" why not using the killProcess() method, so please write down your answer - if you have something interesting to say about that. TIA

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• AStar in a specific case in C#

  - by KiTe

  Hello. To an intership, I have use the A* algorithm in the following case : the unit shape is a square of height and width of 1, we can travel from a zone represented by a rectangle from another, but we can't travel outside these predifined areas, we can go from a rectangle to another through a door, represented by a segment on corresponding square edge. Here are the 2 things I already did but which didn't satisfied my boss : 1 : I created the following classes : -a Door class which contains the location of the 2 separated squares and the door's orientation (top, left, bottom, right), -a Map class which contains a door list, a rectangle list representing the walkable areas and a 2D array representing the ground's squares (for additionnal infomations through an enumeration) - classes for the A* algorithm (node, AStar) 2 : -a MapCase class, which contains information about the case effect and doors through an enumeration (with [FLAGS] attribute set on, to be able to cummulate several information on each case) -a Map classes which only contains a 2D array of MapCase classes - the classes for the A* algorithm (still node an AStar). Since the 2 version is better than the first (less useless calculation, better map classes architecture), my boss is not still satisfied about my mapping classes architecture. The A* and node classes are good and easily mainainable, so I don't think I have to explain them deeper for now. So here is my asking : has somebody a good idea to implement the A* with the problem specification (rectangle walkable but with a square unit area, travelling through doors)? He said that a grid vision of the problem (so a 2D array) shouldn't be the correct way to solve the problem. I wish I've been clear while exposing my problem .. Thanks KiTe

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• Simple Enterprise Library console application refuses to compile

  - by Vadim

  I just downloaded and installed Microsoft Enterprise Library 5.0. I fired up VS 2010 to play with EL 5 and created a very simple console application. However, it would not compile. I got the following error: The type or namespace name 'Data' does not exist in the namespace 'Microsoft.Practices.EnterpriseLibrary' (are you missing an assembly reference?) I added Microsoft.Practices.EnterpriseLibrary.Common, Microsoft.Practices.EnterpriseLibrary.Data, and Microsoft.Practices.Unity references to my project. Here's the simple code that refuses to compile. using Microsoft.Practices.EnterpriseLibrary.Common.Configuration.Unity; using Microsoft.Practices.EnterpriseLibrary.Data; using Microsoft.Practices.Unity; namespace EntLib { class Program { static void Main(string[] args) { IUnityContainer container = new UnityContainer(); container.AddNewExtension<EnterpriseLibraryCoreExtension>(); var defaultDatabase = container.Resolve<Database>(); } } } The error above complains about line #2 : using Microsoft.Practices.EnterpriseLibrary.Data; Someone probably will point out to a stupid mistake by me, but at the moment I fail to see it. I tried to remove and add again Microsoft.Practices.EnterpriseLibrary.Data to refences but it didn't help.

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• Pushing a vector into an vector

  - by Sunil

  I have a 2d vector typedef vector <double> record_t; typedef vector <record_t> data_t; data_t data; So my 2d vector is data here. It has elements like say, 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 Now I want to insert these elements into another 2d vector std::vector< vector<double> > window; So what I did was to create an iterator for traversing through the rows of data and pushing it into windowlike std::vector< std::vector<double> >::iterator data_it; for (data_it = data.begin() ; data_it != data.end() ; ++data_it) window.push_back ( *data_it ); Can anybody tell me where I'm wrong or suggest a way to do this ? Thanks

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• Pushing a vector into an vector

  - by Sunil

  I have a 2d vector typedef vector <double> record_t; typedef vector <record_t> data_t; data_t data; So my 2d vector is data here. It has elements like say, 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 Now I want to insert these elements into another 2d vector std::vector< vector<double> > window; So what I did was to create an iterator for traversing through the rows of data and pushing it into window like std::vector< std::vector<double> >::iterator data_it; for (data_it = data.begin() ; data_it != data.end() ; ++data_it){ window.push_back ( *data_it ); // Do something else } Can anybody tell me where I'm wrong or suggest a way to do this ? BTW I want to push it just element by element because I want to be able to do something else inside the loop too. i.e. I want to check for a condition and increment the value of the iterator inside. for example, if a condition satisfies then I'll do data_it+=3 or something like that inside the loop. Thanks P.S. I asked this question last night and didn't get any response and that's why I'm posting it again.

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• Which way to store this data is effective?

  - by Tattat

  I am writing a game, which need a map, and I want to store the map. The first thing I can think of, is using a 2D-array. But the problem is what data should I store in the 2D-array. The player can tap different place to have different reaction. So, I am thinking store a 2D-array with objects, when player click some position, and I find it in the array, and use the object in that array to execute a cmd. But I have a concern that storing lots of object may use lots of memory. So, I am think storing char/int only. But it seems that not enough for me. I want to store the data like that: { Type:1 Color:Green } No matter what color is, if they are all type 1, the have same reactions in logic, but the visual effect is based on the color. So, it is not easy to store using a prue char/int data, unless I make something like this: 1-5 --> all type 1. 1=color green , 2=color red, 3 = color yellow.... ... 6-10 --> all type 2. 2 = color green, 2 = color red ... ... So, do you have any ideas on how to minimize the ram use, but also easy for me to read... ...thx

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• WPF app startup problems

  - by Dave

  My brain is all over the map trying to fully understand Unity right now. So I decided to just dive in and start adding it in a branch to see where it takes me. Surprisingly enough (or maybe not), I am stuck just getting my darn Application to load properly. It seems like the right way to do this is to override OnStartup in App.cs. I've removed my StartupUri from App.xaml so it doesn't create my GUI XAML. My App.cs now looks something like this: public partial class App : Application { private IUnityContainer container { get; set; } protected override void OnStartup(StartupEventArgs e) { container = new UnityContainer(); GUI gui = new GUI(); gui.Show(); } protected override void OnExit(ExitEventArgs e) { container.Dispose(); base.OnExit(e); } } The problem is that nothing happens when I start the app! I put a breakpoint at the container assignment, and it never gets hit. What am I missing? App.xaml is currently set to ApplicationDefinition, but I'd expect this to work because some sample Unity + WPF code I'm looking at (from Codeplex) does the exact same thing, except that it works! I've also started the app by single-stepping, and it eventually hits the first line in App.xaml. When I step into this line, that's when the app just starts "running", but I don't see anything (and my breakpoint isn't hit). If I do the exact same thing in the sample application, stepping into App.xaml puts me right into OnStartup, which is what I'd expect to happen. Argh! Is it a Bad Thing to just put the Unity construction in my GUI's Window_Loaded event handler? Does it really need to be at the App level?

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• own drawImage / drawLine in OpenGL

  - by Chrise

  I'm implementing some native 2D-draw functions in my graphics engine for android, but now there's another question coming up, when I observe the performance of my program. At the moment I'm implementing a drawLine/drawImage function. In summary, there are following different values for drawing each different line / image: the color the alpha value the width of the line rotation (only for images) size/scale (also for images) blending method (subrtract, add, normal-alpha) Now, when an imageLine is drawn, I put the CPU-calculated vertex-positions and uv-values for 6 vertices (2 triangles), into a Floatbuffer and draw it immediately with drawArrays, after passing information for drawing (color,alpha, etc.) via uniforms to the shader. When I draw an image, the pre-set VBO is directly drawn after passing information. The first fact I recognized, is: of course drawing Images is much faster, than imagelines (beacuse of VBOs), but also: I cannot pre-put vertex-data into a VBO for imageLines, because imageLines have no static shape like normal images (varying linelength, varying linewidth and the vertex positions of x1,y1 and x2,y2 change too often) That's why I use a normal Floatbuffer, instead of a VBO. So my question is: What's the best way for managing images, and other 2D-graphics functions. For me it's some kind of important, that the user of the engine is able to draw as many images/2D graphics as possible, without loosing to much performance. You can find the functions for drawing images, imagelines, rects, quads, etc. here: https://github.com/Chrise55/LLama3D/blob/master/Llama3DLibrary/src/com/llama3d/object/graphics/image/ImageBase.java Here an example how it looks with many images (testing artificial neural networks), it works fine, but already little bit slow with that many images... :(

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• What was your "aha moment" in understanding delegates?

  - by CM90

  Considering the use of delegates in C#, does anyone know if there is a performance advantage or if it is a convenience to the programmer? If we are creating an object that holds a method, it sounds as if that object would be a constant in memory to be called on, instead of loading the method every time it is called. For example, if we look at the following Unity3D-based code: public delegate H MixedTypeDelegate<G, H>(G g) public class MainParent : MonoBehaviour // Most Unity classes inherit from M.B. { public static Vector3 getPosition(GameObject g) { /* GameObject is a Unity class, and Vector3 is a struct from M.B. The "position" component of a GameObject is a Vector3. This method takes the GameObject I pass to it & returns its position. */ return g.transform.position; } public static MixedTypeDelegate<GameObject, Vector3> PositionOf; void Awake( ) // Awake is the first method called in Unity, always. { PositionOf = MixedTypeDelegate<GameObject, Vector3>(getPosition); } } public class GameScript : MainParent { GameObject g = new GameObject( ); Vector3 whereAmI; void Update( ) { // Now I can say: whereAmI = PositionOf(g); // Instead of: whereAmI = getPosition(g); } } . . . But that seems like an extra step - unless there's that extra little thing that it helps. I suppose the most succinct way to ask a second question would be to say: When you had your aha moment in understanding delegates, what was the context/scenario/source? Thank you!

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• DDR3 10600 memory running at 533mhz

  - by Elger

  I bought a second hand hp dl160 g6 a year ago with 48GB configured in it. I discovered checking with cpu-z and doublechecked with speccy the memory runs at only 533Mhz. I checked the configuration with the HP memory configurator and the banks are populated correctly for max performance. There are 12 banks populated with micron and hynix memory of 4gb, all capable of running 1333mhz. What could me wrong here? C:\Users\Administrator>wmic Memorychip get manufacturer, partnumber, speed, seri alnumber, devicelocator, banklabel BankLabel DeviceLocator Manufacturer PartNumber SerialNumber Speed BANK0 PROC 1 DIMM 3A Micron 36JSZF51272PZ1G4F C5DF65D7 1333 BANK1 PROC 1 DIMM 2D Micron 36JSZF51272PY1G4D 951565E0 1333 BANK3 PROC 1 DIMM 6B Micron 36JSZF51272PZ1G4F 3F3160D6 1333 BANK4 PROC 1 DIMM 5E Hyundai HMT151R7BFR4C-H9 E28A3014 1333 BANK6 PROC 1 DIMM 9C Micron 36JSZF51272PZ1G4F 26DF7E1A 1333 BANK7 PROC 1 DIMM 8F Micron 36JSZF51272PZ1G4G 77FC67D7 1333 BANK9 PROC 2 DIMM 3A Hyundai HMT151R7BFR4C-H9 FB763433 1333 BANK10 PROC 2 DIMM 2D Hyundai HMT151R7BFR4C-H9 E18AA014 1333 BANK12 PROC 2 DIMM 6B Hyundai HMT151R7BFR4C-H9 DF8A1014 1333 BANK13 PROC 2 DIMM 5E Hyundai HMT151R7BFR4C-H9 6968511A 1333 BANK15 PROC 2 DIMM 9C Hyundai HMT151R7BFR4C-H9 F28A7014 1333 BANK16 PROC 2 DIMM 8F Micron 36JSZF51272PZ1G4G 76FC67D7 1333

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• Identifying the version of ATI Catalyst drivers

  - by snark

  I have bought a new video card based on the ATI Radeon HD 5670 chipset. I couldn't make it work with the latest ATI Catalyst drivers found on their website, only the drivers found on the CD delivered with the card worked. How can I know the version of Catalyst that is installed on my PC (running Windows 7 64-bits)? The ATI Catalyst Control Center returns the following information: Driver Packaging Version 8.673-091110a-092263C Provider ATI Technologies Inc. 2D Driver Version 8.01.01.973 2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0000 Direct3D Version 8.14.10.0708 OpenGL Version 6.14.10.9120 Catalyst™ Control Center Version 2009.1110.2225.40230 I do not recognize anything pointing to a "marketing version". The website says the current version of Catalyst is 10.2.

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• Agent admitted failure to sign using the key.

  - by Delirium tremens

  .ssh dir is chmodded 700, id_rsa.pub 600, id_rsa 400. I ran ssh-keygen -t rsa, imported key to launchpad and ran bzr branch lp:unity, but got error message: Agent admitted failure to sign using the key. Permission denied (publickey). bzr: ERROR: Connection closed: Unexpected end of message. Please check connectivity and permissions, and report a bug if problems persist. auth.log: Nov 28 20:23:13 ubuntu sudo: deltrem : TTY=pts/0 ; PWD=/home/deltrem/Documentos/repositories ; USER=root ; COMMAND=/usr/bin/bzr branch lp:unity Nov 28 20:39:01 ubuntu CRON[2959]: pam_unix(cron:session): session opened for user root by (uid=0) Nov 28 20:39:01 ubuntu CRON[2959]: pam_unix(cron:session): session closed for user root Nov 28 20:41:04 ubuntu gnome-screensaver-dialog: gkr-pam: unlocked login keyring

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• verisign certificate into jboss server SSL

  - by rfders

  Hi all, i'm trying to enable jboss to uses ssl protocol using a previously generated certificate from verisign, i imported both certificate, server certificate and ca certificate into the keytore file, and i configured the server.xml to use that keystore and activate ssl protocol, then when i run the jboss, I got this error "certificate or key corresponds to the SSL cipher suites which are enabled" Question, reading some post on internet, i found that every example was made it generating a Certificate Request, it stricly necesary to do that if i already have the server certificate and that CSR has to be imported into the keystore as well ? at this point i'm very confused about this issue, i tried almost every solutions posted in several forums but till now i haven't any luck !! can you give me some tips in order to solve this problem. thanks in advance this are my keystore file: Keystore type: jks Keystore provider: SUN Your keystore contains 2 entries j2ee, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): 69:CC:2D:2A:2D:EF:C4:DB:A2:26:35:57:06:29:7D:4C ugent, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): AC:D8:0E:A2:7B:B7:2C:E7:00:DC:22:72:4A:5F:1E:92 and my server.xml configuration:

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• OpenGL support no longer available

  - by Aznfin

  I've been using OpenGL hardware acceleration in programs such as Adobe Photoshop CS4 and Adobe After Effects CS4. I've noticed that recently the options for OpenGL previews are disabled because my graphics card seems to not support OpenGL. But that doesn't make any sense whatsoever. I know for a fact that my graphics card does have support for OpenGL and it worked before. I checked for driver updates just the other day. Anybody know what's going on? Info: Operating System: Windows 7 Home Premium 64-bit GPU: ATI Radeon HD 3200 Driver Packaging Version: 8.69-091211a-094296C-ATI Catalyst™ Version: 09.12 Provider: ATI Technologies Inc. 2D Driver Version: 8.01.01.994 2D Driver File Path: /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS /{4D36E968-E325-11CE-BFC1-08002BE10318}/0000 Direct3D Version: 8.14.10.0723 OpenGL Version: 6.14.10.9252 Catalyst™ Control Center Version: 2009.1211.1547.28237

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• Why does Windows 7 need hardware virtualization to run XP mode?

  - by Ken Pespisa

  I have a MacBook Pro and I've run VMware Fusion's unity mode and Parallels' cohesion mode along side the Mac OS X, and both work pretty seamlessly. I figured XP Mode in Windows 7 would be something similar, but I then learned my machine requires hardware virtualization support, which it does not have. My machine is an HP dc7800. That's a dual core 2.2GHz machine with 4GBs of RAM. Certainly it has the horsepower to run a virtual environment alongside the primary OS. I'm wondering: 1) Why Microsoft decided to make hardware virtualization a requirement and 2) What am I missing? Is the experience similar to Parallel's cohesion mode / Fusion's unity mode? Thanks!

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• Playing 3D mkv on 3D TV

  - by user137713

  I just bought a brand new LG 42LW4500 TV with enabled 3D think its passive any how i have an option to convert 2D 3D i also got a full set of normal 3D Glases. Now today i downloaded a 3D movie (14GB) Full HD in a mkv format i hooked up my PC to my TV and opened the mkv in VLC player and what i got was 2 pictures in one screen sowing same thing. Now i am lost from here i enabled 3D but it didnt really feel like 3D. Can anyone shed some ligth on how can you play 3D movies do i need to use 2D 3D conversion on tv or?

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• verisign certificate into jboss server SSL

  - by rfders

  i'm trying to enable jboss to uses ssl protocol using a previously generated certificate from verisign, i imported both certificate, server certificate and ca certificate into the keytore file, and i configured the server.xml to use that keystore and activate ssl protocol, then when i run the jboss, I got this error "certificate or key corresponds to the SSL cipher suites which are enabled" Question, reading some post on internet, i found that every example was made it generating a Certificate Request, it stricly necesary to do that if i already have the server certificate and that CSR has to be imported into the keystore as well ? at this point i'm very confused about this issue, i tried almost every solutions posted in several forums but till now i haven't any luck !! can you give me some tips in order to solve this problem. thanks in advance this are my keystore file: Keystore type: jks Keystore provider: SUN Your keystore contains 2 entries j2ee, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): 69:CC:2D:2A:2D:EF:C4:DB:A2:26:35:57:06:29:7D:4C ugent, Dec 29, 2009, trustedCertEntry, Certificate fingerprint (MD5): AC:D8:0E:A2:7B:B7:2C:E7:00:DC:22:72:4A:5F:1E:92 and my server.xml configuration:

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• Identifying the version of ATI Catalyst drivers

  - by Snark

  I have bought a new video card based on the ATI Radeon HD 5670 chipset. I couldn't make it work with the latest ATI Catalyst drivers found on their website, only the drivers found on the CD delivered with the card worked. How can I know the version of Catalyst that is installed on my PC (running Windows 7 64-bits)? The ATI Catalyst Control Center returns the following information: Driver Packaging Version 8.673-091110a-092263C Provider ATI Technologies Inc. 2D Driver Version 8.01.01.973 2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0000 Direct3D Version 8.14.10.0708 OpenGL Version 6.14.10.9120 Catalyst™ Control Center Version 2009.1110.2225.40230 I do not recognize anything pointing to a "marketing version". The website says the current version of Catalyst is 10.2.

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• Match over multiple lines perl regular expression

  - by John

  Hi, I have a file like this: 01 00 01 14 c0 00 01 10 01 00 00 16 00 00 00 64 00 00 00 65 00 00 01 07 40 00 00 22 68 61 6c 2e 6f 70 65 6e 65 74 2e 63 6f 6d 3b 30 30 30 30 30 30 30 30 32 3b 30 00 00 00 00 01 08 40 00 00 1e 68 61 6c 2e 6f 70 65 6e 65 74 2d 74 65 6c 65 63 6f 6d 2e 6c 61 6e 00 00 00 00 01 28 40 00 00 21 72 65 61 6c 6d 31 2e 6f 70 65 6e 65 74 2d 74 65 6c 65 63 6f 6d 2e 6c 61 6e 00 00 00 00 00 01 25 40 00 00 1e 68 61 6c 2e 6f 70 65 6e 65 74 2d 74 65 6c 65 63 6f 6d 2e 6c 61 6e 00 00 00 00 01 1b 40 00 00 20 72 65 61 6c 6d 2e 6f 70 65 6e 65 74 2d 74 65 6c 65 63 6f 6d 2e 6c 61 6e 00 00 01 02 40 00 00 0c 01 00 00 16 00 00 01 a0 40 00 00 0c 00 00 00 01 00 00 01 9f 40 00 00 0c 00 00 00 00 00 00 01 16 40 00 00 0c 00 00 00 00 00 00 01 bb 40 00 00 28 00 00 01 c2 40 00 00 0c 00 00 00 00 00 00 01 bc 40 00 00 13 31 39 37 37 31 31 31 32 32 33 31 00 I am reading the file and then finding certain octets and replacing them with tags: while(<FH>){ $line =~ s/(00 00 00 64)/<incr4> /g; $line =~ s/(00 00 00 65)/<incr4> /g; $line =~ s/(30 30 30 30 30 32)/<incr6ascii:999999:0>/g; $line =~ s/(31 31 32 32 33 31)/<incr6ascii:999999:0>/g; print OUTPUT $line; # } So for example, 00 00 00 64 would be replaced by the tag. This was working fine, but it doesn't seem to able to match over multiple lines any more. For example the pattern 31 31 32 32 33 31 runs over multiple lines, and the regular expression doesn't seem to catch it. I tried using /m /s pattern modifiers to ignore new lines but they didn't match it either. The only way around it I can come up with, is to read the whole file into a string using: undef $/; my $whole_file = <FH>; my $line = $whole_file; $line =~ s/(00 00 00 64)/<incr4> /g; $line =~ s/(00 00 00 65)/<incr4> /g; $line =~ s/(30 30 30 30 30 32)/<incr6ascii:999999:0>/g; $line =~ s/(31 31 32 32 33 31)/<incr6ascii:999999:0>/g; print OUTPUT $line; This works, the tags get inserted correctly, but the structure of the file is radically altered. It is all dumped out on a single line. I would like to retain the structure of the file as it appears here. Any ideas as to how I might do this? /john

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• Z axis in isometric tilemap

  - by gyhgowvi

  I'm experimenting with isometric tile maps in JavaScript and HTML5 Canvas. I'm storing tile map data in JavaScript 2D array. // 0 - Grass // 1 - Dirt // ... var mapData = [ [0, 0, 0, 0, 0], [0, 0, 1, 0, 0, ... ] and draw for(var i = 0; i < mapData.length; i++) { for(var j = 0; j < mapData[i].length; j++) { var p = iso2screen(i, j, 0); // X, Y, Z context.drawImage(tileArray[mapData[i][j]], p.x, p.y); } } but this function mean's all tile Z axis is equal to zero. var p = iso2screen(i, j, 0); Maybe anyone have idea and how to do something like mapData[0][0] Z axis equal to 3 mapData[5][5] Z axis equal to 5? I have idea: Write function for grass, dirt and store this function to 2D array and draw and later mapData[0][0].setZ(3); But it is good idea to write functions for each tiles?

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• Polygonal Triangulation - algorithm with O(n log n) complexity

  - by Arthur Wulf White

  I wish to triangulate a polygon I only have the outline of (p0, p1, p2 ... pn) like described in this question: polygon triangulation algorithm and this webpage: http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/97/Ian/algorithm2.html I do not wish to learn the subject and have a deep understanding of it at the moment. I only want to see an effective algorithm that can be used out of the box. The one described in the site seems to be of somewhat high complexity O(n) for finding one ear. I heard this could be done in O(n log n) time. Is there any well known easy to use algorithm that I can translate port to use in my engine that runs with somewhat reasonable complexity? The reason I need to triangulate is that I wish to feel out a 2d-outline and render it 3d. Much like we fill out a 2d-outline in paint. I could use sprites. This would not serve cause I am planning to play with the resulting model on the z-axis, giving it different heights in the different areas. I would love to try the books that were mentioned, although I suspect that is not the answer most readers are hoping for when they read this Q & A format. Mostly I like to see a code snippet I can cut and paste with some modifications and start running.

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• Rendering shadow sprites in cocos2d-x

  - by lukeluke

  I am writing a 2D game with cocos2d-x. I want to put a "shadow" sprite on a background sprite using the equation: MAX(0, Cd*1 - Cs*S) where Cd is the destination color (that is, a background pixel), Cs is the source color (the shadow pixel) , S is the scale factor (between 0 and 1). The MAX() function is used to avoid negative results. This is a lighting effect: when the shadow sprite pixel is 0, there is no effect on the background pixel, otherwise, the background pixel becomes darker. Now, the only way that comes to my mind is to change the blending equation to GL_FUNC_SUBTRACT, but it doesn't compile with cocos2d-x (can't found it)... I would subclass the CCSprite class in order to implement the draw() method in order to change, when needed, the blending equation, call the original draw() method and restore the blending equation to its previous state at the end of the method. So my questions are two: how to use glBlendEquation() with cocos2d-x? Keep in mind that i am writing a game for iphone/android/windows. are shadows handled this way in 2D games? Thx

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• Confusion for mime files: magic, magic.mgc, magic.mime

  - by Florence Foo

  I'm using Ubuntu. I'm trying to use ruby gem 'shared-mime-info' for an application I'm writing. I understand that magic.mgc is a compiled version of magic file which has magic number definitions for the different file types. BUT I don't understand why is it /usr/share/mime/magic is in binary format instead of just normal text file with each parameters separated by white space like everywhere else I'm finding on the internet when it's referencing this file? The /usr/share/mime/magic has the word 'MIME-Magic' at the beginning of the file and prioritize the rest of the stuff like. So it doesn't look like magic.mgc at all. [100:application/vnd.scribus] >1=^@^KSCRIBUSUTF8 [90:application/vnd.stardivision.writer] >2089=^@ shared-mime-info seems to want a magic file in the binary non compiled format as above and I wanted to add definition for DOCX but how does one update or generate this file without using a hex editor? There is a reference to the magic file I found at: http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html And it mention this file is updated with update-mime-database but what if I just want to add some new entry to it. hex editor? Anyway I ended up using hexer to make a new magic file in ~/.local/share/mime/ with only the entry I wanted to add and the MIME-Magic header. Seems to work (assuming I will ever deal with docx for now). 00000000: 4d 49 4d 45 2d 4d 61 67 69 63 00 0a 5b 36 30 3a MIME-Magic..[60: 00000010: 61 70 70 6c 69 63 61 74 69 6f 6e 2f 76 6e 64 2e application/vnd. 00000020: 6f 70 65 6e 78 6d 6c 66 6f 72 6d 61 74 73 2d 6f openxmlformats-o 00000030: 66 66 69 63 65 64 6f 63 75 6d 65 6e 74 2e 77 6f fficedocument.wo 00000040: 72 64 70 72 6f 63 65 73 73 69 6e 67 6d 6c 2e 64 rdprocessingml.d 00000050: 6f 63 75 6d 65 6e 74 5d 0a 3e 30 3d 00 08 50 4b ocument].>0=..PK 00000060: 03 04 14 00 06 00 0a -- -- -- -- -- -- -- -- -- .......---------

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• Manually writing a dx11 tessellation shader

  - by Tudor

  I am looking for resources on what are the steps of manually implementing tessellation (I'm using Unity cg). Today it seems that it is all the rage to hide most of the gpu code far away and use rather rigid simplifications such as unity's SURFace shaders. And it seems useless unless you're doing supeficial stuff. A little background: I have procedurally generated meshes (using marching cubes) which have quality normals but no UVs and no Tangents. I have successfully written a custom vertex and fragment shader to do triplanar texture and bumpmap projection as well as some custom stuff (custom lighting, procedurally warping the texture for variation etc). I am using the GPU Gems book as reference. Now I need to implement tessellation, but It seems I must calculate the tangents at runtime by swizzling normals (ctrl+f this in gems: <normal.z, normal.y, -normal.x>) before the tessellator gets them. And I also need to keep my custom vert+frag setup (with my custom parameters/textures being passed between them) - so apparently I cannot use surface shaders. Can anyone provide some guidence?

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