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  • C# XNA Make rendered screen a texture2d

    - by redcodefinal
    I am working on a cool little city generator which makes cities in the isometric perspective. However, a problem arose where if the grid size was over a certain limit it would have awful lag. I found the main problem to be in the draw method. So I took the precautionary step of rendering only items that were onscreen. This fixed the lag but, not by much. The idea I have is to render the frame once and take a snapshot. Then, display that as a texture2d on screen. This way I don't have to render 1,000,000 objects every frame since they don't change anyways. TL;DR - I want to Take a snapshot of an already rendered frame Turn it into a Texture2D Render that to the screen instead of all the objects. Any help appreciated.

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  • Good resources for learning about graphics hardware

    - by Ken
    I'm looking for some good learning resources for graphics hardware (and associated low level software). Basically I want to learn more about what goes on underneath the opengl/direcx API layers in terms of how things are implemented. I familiar with what happens in principle during the various stages of the rendering pipeline (viewing, projection, clipping, rasterization etc). My goal is to be able to make better and more informed decisions about tradeoffs and potential optimisations when graphics/shader programming with respect to the following kinds of issues; batching view culling occlusions draw order avoiding state changes triangles vs pointsprites texture sampling etc Basically whatever the graphics programmer needs to know about modern graphics hardware in order to become more effective. I'm not really looking for specific optimisation techniques, rather I need more general knowledge so that I will naturally write more efficient code.

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  • I Need Help With A Game (Well The API)! [closed]

    - by user1758938
    I'm not "sure" which API (or language) I should use for a little 3D FPS game I'm gonna make although I don't have helpers lol. Anyway I'm ok with Java, C# and C++ but I need a good setup (easy to use) with the tools I need to make the game. I tried things like XNA but I want to check other options first because I don't like how it makes a installer and stuff, it's really annoying. I Need A API That Can Do These Things: 3D Rendering Input Sound And If It's Not Too Much To Ask Some Cool Shaders, Dynamic Lighting And A 3D Sound System Im "Ok" If I Have To Use Multiple APIs To Do This But Please Help Me!

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  • Rotate object Up/Down/Left/Right in any orientation

    - by George Duckett
    I'm rendering model at the origin with a fixed camera looking at it positioned on the z axis. I want to be able to rotate the model up/down and left/right. Currently I have 2 variables, HorizontalRotation and VerticalRotation. When calculating the world matrix I rotate about the Y axis by HorizontalRotation and about the X axis by VerticalRotation. The ..Rotation variables are controlled by pressing up/down/left/right arrow keys. The problem I'm having is that the rotations are happening relative to the object. Lets say it's a model of the world. Pressing Up a bit would let me look at the north pole. Currently when i press right the earth spins infront of the camera on its axis; I'm still looking at the north pole. How can i get it so that no matter what rotations are currently applied i can always rotate my model relative to the camera/world axis?

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  • Headphones don't work on an Acer Aspire 5920g

    - by Dave Chatelain
    All the problems I read about were all about the sound not working when they plugged the headphones in. I have the problem that my mic will work but the sound is still played on my built-in speakers. When I look at the sound settings, it doesn't give me any options for headphones. I run 12.04 and never had this problem in Windows. I run it on a Acer Aspire 5920g. Any tips or ideas will be very helpful.

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  • Data Structures: What are some common examples of problems where "buffers" come into action?

    - by Dark Templar
    I was just wondering if there were some "standard" examples that everyone uses as a basis for explaining the nature of a problem that requires the use of a buffer. What are some well-known problems in the real world that can see great benefits from using a buffer? Also, a little background or explanation as to why the problem benefits from using a buffer, and how the buffer would be implemented, would be insightful for understanding the concept!

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  • SpriteBatch.Begin() making my model not render correctly

    - by manning18
    I was trying to output some debug information using DrawString when I noticed my model suddenly was being rendered like it was inside-out (like the culling had been disabled or something) and the texture maps weren't applied I commented out the DrawString method until I only had SpriteBatch.Begin() and .End() and that was enough to cause the model rendering corruption - when I commented those calls out the model rendered correctly What could this be a symptom of? I've stripped it down to the barest of code to isolate the problem and this is what I noticed. Draw code below (as stripped down as possible) GraphicsDevice.Clear(Color.LightGray); foreach (ModelMesh mesh in TIEAdvanced.Meshes) { foreach (Effect effect in mesh.Effects) { if (effect is BasicEffect) ((BasicEffect)effect).EnableDefaultLighting(); effect.CurrentTechnique.Passes[0].Apply(); } } spriteBatch.Begin(); spriteBatch.DrawString(spriteFont, "Camera Position: " + cameraPosition.ToString(), new Vector2(10, 10), Color.Blue); spriteBatch.End(); GraphicsDevice.DepthStencilState = DepthStencilState.Default; TIEAdvanced.Draw(Matrix.CreateScale(0.025f), viewMatrix, projectionMatrix);

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  • I am not able to disable certain keys even after using xmodmap

    - by Arora
    Some of the keys on my keyboard are continously pressed. I am trying to disable that key using the following command: xmodmap -e 'keycode 115=' or xmodmap -e 'keycode 115='NoSymbol' It works for some time, I can see the Symbol associated with that key getting updated using xev command. But the problem is it gets changed to it's default symbol after some time and starts creating the problem again. How can I overcome this issue.

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  • Can various browsers be assumed to maintain predictible state accurately in multiplayer online gaming?

    - by Nikos
    With many games it is said that server will assume that clients keep track of the world accurately. Assuming this is true, for a browser based multiplier space invaders game you would only tell the client when new bullets or the players ship moves and everything that behaves in a predetermined manner in the js client. It would be expected that positions would be the same in the browsers. Do you think you could trust browsers to do this? I feel that timings could differ between rendering loops and cause positions to get out of sync and might just get the server to maintain all the positions to make sure.

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  • Using allocators for different systems

    - by chadb
    I am going over the memory architecture for my game and even though I know my memory budgets may not be final, I at the point where I can start using them in a general sense. I know that I will need several allocators (for systems such as audio, rendering, etc) but I am unsure of how they will be accessed. I do not use singletons, so I can't just have something such as AudioManager::GetInstance().get_allocator(). Instead, I need to find a different method of usage but I am not sure of how. How can I store and call my allocators needed for several different systems over engine in an efficient manner?

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  • krunner unreadable black text on black background. File a bug? Where?

    - by user52784
    I'm running Kubuntu 12.04 beta2 (up to date). Already tried to create a user from the scratch but the problem can still be replicated. I'll make it simple: with any of the available themes (air, air 4 netbooks, oxygen) whenever I disable desktop effects, KRunner instantly becomes black (with black fonts) rendering itself useless because of its unreadable text. Here is a screenshot I took: http://i42.tinypic.com/348sz7n.jpg The weird thing is that with effects enabled KRunner is "light gray" and perfectly functional. What can I do? Should I file a bug? If yes: where? On the KDE bug tracker or the Kubuntu one? Thanks in advance!

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  • Why df and du show different output

    - by Nischay
    When I execute command df -h /tmp it says disk utilization is 100% but when it tried du -sh /tmp it says disk utilization is 2%. I want to know why these commands shows different output and these two commands work and what is the solution of this problem. /var is installed on it own file system .I am using Ubuntu 12.04 server edition on my vps account.Due to this problem utilization of /tmp 100% according to df some programs complain about free space in /tmp.

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  • Is Adobe Flash 11.2 working with Nvidia hardware again in 12.04?

    - by Oranges
    I installed the newest Nvidia-Linux drivers version number 304.43 on 12.04 installation and all Flash Videos now show me "accelerated video rendering". Previous Nvidia drivers + Adobe Flash only rendered in software, at least since Adobe officially said they turned off "hardware acceleration" for Linux, because of unstable and unsecure drivers. Has this changed? Is hardware acceleration really back? Can anyone verify this as well? The Nvidia driver 304.43 patch notes said: Fixed a bug that caused VDPAU to hang when expanding the YouTube Flash Player. Hardware: Nvidia 8600M GT

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  • How I Built My First Paid Website

    I have been a web master or a website administrator for around a year or so, initially I built two sites which were entirely made using a free domain registrar and a free web host. The free things are always got at the cost of quality. It applied here as well, the main problem I faced with free web host was that their server up time was very low, most of the times the server was down and another problem was server overload, since lots of websites were built on a single server, the load on the server was very...

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  • Error Message when starting Update: Failed to load the package list

    - by George
    Message says: Failed to load the package list This is a serious problem. Try again later. If this problem appears again, please report an error to the developers. Click details, which says: E:Type 'http://ppa.launchpad.net/madman2k/ubuntu' is not known on line 61 in source list /etc/apt/sources.list Tried this solution: sudo rm /var/lib/apt/lists/* -vf sudo apt-get update However, when entering the first command, it hits back an error: rm: cannot remove `/var/lib/apt/lists': Is a directory

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  • How to set sprite source coordinates?

    - by ChaosDev
    I am creating own sprite drawer with DX11 on C++. Works fine but I dont know how to apply source rectangle to texture coordinates of rendering surface(for animation sprite sheets) //source = (0,0,32,64); //RECT D3DXVECTOR2 t0 = D3DXVECTOR2( 1.0f, 0.0f); D3DXVECTOR2 t1 = D3DXVECTOR2( 1.0f, 1.0f); D3DXVECTOR2 t2 = D3DXVECTOR2( 0.0f, 1.0f); D3DXVECTOR2 t3 = D3DXVECTOR2( 0.0f, 1.0f); D3DXVECTOR2 t4 = D3DXVECTOR2( 0.0f, 0.0f); D3DXVECTOR2 t5 = D3DXVECTOR2( 1.0f, 0.0f); VertexPositionColorTexture vertices[] = { { D3DXVECTOR3( dest.left+dest.right, dest.top, z),D3DXVECTOR4(1,1,1,1), t0}, { D3DXVECTOR3( dest.left+dest.right, dest.top+dest.bottom, z),D3DXVECTOR4(1,1,1,1), t1}, { D3DXVECTOR3( dest.left, dest.top+dest.bottom, z),D3DXVECTOR4(1,1,1,1), t2}, { D3DXVECTOR3( dest.left, dest.top+dest.bottom, z),D3DXVECTOR4(1,1,1,1), t3}, { D3DXVECTOR3( dest.left , dest.top, z),D3DXVECTOR4(1,1,1,1), t4}, { D3DXVECTOR3( dest.left+dest.right, dest.top, z),D3DXVECTOR4(1,1,1,1), t5}, };

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  • Mobile My Oracle Support 6.3 Release is live!

    - by JanSyss
    We have released Mobile My Oracle Support 6.3 last Saturday (13-Oct-2012), including 10 enhancements and almost 40 bug fixes. Mobile My Oracle Support is My Oracle Support's webapplication optimized for mobile devices to manage your Service Requests, your On Demand Requests for Change (RFCs), search over Support's Knowledge Base, Bug database or Sun System Handbook, and to manage your pending user requests (CUA). You can find the application at http://support.oracle.mobi  or get redirected from http://support.oracle.com when using a mobile device. Overall Several UI optimizations in different screens. Service Request Area Show the platinum icon for Platinum SRs and the restore status for Platinum Sev 1s. Email send with Share functionality now contains links to Mobile MOS and Full Site. Knowledge Management Area Ability in Advanced Search to search the Sun System Handbook (cfr. screenshot below) Better rendering of the KB documents to avoid where possible horizontal scrolling. Don't hesitate to share your feedback and comments or even requests.

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  • "BAD ARCHIVE MIRROR" error while installing ubuntu server 12.04

    - by Hirdesh - Technonimal
    I downloaded the server version of Ubuntu from Ubuntu's official site. Created a Bootable USB from the ISO file I downloaded. I connected through Internet using DHCP in the installation process. While I was installing it on my Desktop Computer (pentium D 1 GB RAM) I have this error "Bad Archive Mirror". I also found 2-3 questions with same problem on forum but I didn't get solution of my problem from them.

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  • World of warcraft wont install because of error concerning "agent.exe"?

    - by Stanton.Sculpture
    I've been trying to install World of Warcraft with no luck. I looked in the forums and this guy has been having the same problem: http://us.battle.net/wow/en/forum/topic/7005434029#new-post I can't get past the checking for updates screen until I get this error message: https://us.battle.net/support/en/article/BLZPTS00007 Tried installing it through Playonlinux too and its the same problem for the most part. Looking for any help. Thank you!

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  • Tip: File Download in ASP.Net and Tracking the status of success/failure of Download

    While working on a e-commerce project I had a requirement to implement such a functionality where the success/failure of the download can be tracked. After searching for the solution I found that there is no such article related to similar problem. Then I came up with this solution after reading an article on transferring file in small packets. I hope this solution will help others struggling with similar problem.

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  • Can't connect to windows 7 ad-hoc network

    - by Nikolaj
    Good day! I have installed ubuntu 12.04 on my laptop and I need to have network connection on it. Have a desktop PC, where I've created ad-hoc wi-fi network(Windows 7) and can't connect to it. So, problem: I see my network in the list of networks to connect, but I cant connect to it because it's grey color and not active(can't click on it). Could somebody help me to solve that problem? Thanks in advance!

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  • Cannot boot normally, without restarting lightdm (or gdm)

    - by leventov
    I had a problem precisely described here: http://www.webupd8.org/2013/01/ubuntu-lightdm-black-screen-when-using.html, black screen with blinking cursor instead of login screen. I've switched to gdm using sudo dpkg-reconfigure gdm -- but faced the same problem, now loading process stops on "red-white Ubuntu dots" (without activity under this splash). And to login, I still need to restart display manager: Ctrl+Alt+F1 and sudo service gdm restart. How to make Ubuntu to boot normally?

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  • How to avoid oscillation by async event based systems?

    - by inf3rno
    Imagine a system where there are data sources which need to be kept in sync. A simple example is model - view data binding by MVC. Now I intend to describe these kind of systems with data sources and hubs. Data sources are publishing and subscribing for events and hubs are relaying events to data sources. By handling an event a data source will change it state described in the event. By publishing an event the data source puts its current state to the event, so other data sources can use that information to change their state accordingly. The only problem with this system, that events can be reflected from the hub or from the other data sources, and that can put the system into an infinite oscillation (by async or infinite loop by sync). For example A -- data source B -- data source H -- hub A -> H -> A -- reflection from the hub A -> H -> B -> H -> A -- reflection from another data source By sync it is relatively easy to solve this issue. You can compare the current state with the event, and if they are equal, you don't change the state and raise the same event again. By async I could not find a solution yet. The state comparison does not work by async event handling because there is eventual consistency, and new events can be published in an inconsistent state causing the same oscillation. For example: A(*->x) -> H -> B(y->x) -- can go parallel with B(*->y) -> H -> A(x->y) -- so first A changes to x state while B changes to y state -- then B changes to x state while A changes to y state -- and so on for eternity... What do you think is there an algorithm to solve this problem? If there is a solution, is it possible to extend it to prevent oscillation caused by multiple hubs, multiple different events, etc... ? update: I don't think I can make this work without a lot of effort. I think this problem is just the same as we have by syncing multiple databases in a distributed system. So I think what I really need is constraints if I want to prevent this problem in an automatic way. What constraints do you suggest?

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  • System hangs at glReadPixel call with GL_TEXTURE_2D_ARRAY for texturing

    - by Roshan
    I am calling glReadPixel after glDrawArray call. I am rendering a geometry with 3D texture on it as a target GL_TEXTURE_2D_ARRAY. My systems hangs at glreadpixel call. When i use target as GL_TEXTURE_3D the issue does not occurs and it correctly reads the framebuffer contents. glReadPixels(0, 0, GetViewportWidth(), GetViewportHeight(), GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)rendered_pixels); I am using SNORM textures with GL_byte data in glTeximage3D call and I am not calling glPixelStorei, is it because of this? What should be the parameter for pixelstore call?

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