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• How do you load in a .bmp file to use it as a height map in C++?

  - by user1324894

  I need to create a terrain that can be used in C++ and opengl and I am told that using a height map is the way to go. I have a .bmp file that is a greyscale image that I would like to use. However, I do not know how to load that greyscale image into the project so that it can be used as a height map or how I can apply a texture to it to create terrain nor how to compute the normals that I'm told will be required. How would I go about achieving what I would like to do?

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• Triple monitors on hybrid video system GeForce+Intel

  - by v_mil

  I use Lenovo Ideapad Z580A with hybrid video: GeForce+Intel with Ubuntu 12.10 x64 Ukrainian. It has internal display and two outputs: HDMI and VGA. When I connect third display to VGA all displays go black. Pressing alt+backspace and login causes output to two displays: internal and VGA. System Settings - Displays (or monitors - I have Ukrainian interface) shows three displays: two are on, one (DVI) is off. Turning DVI on and pressing apply causes an error: Can not set configuration of controller CRTC 65. BIOS setting is Optimus (two video cards). Driver for GeForce is Nouveau. With best regards. Viktor.

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• Will 3D games run in a VirtualBox4-hosted Windows system under Ubuntu with Intel GMA X4500HD card?

  - by Ivan

  I've just got a laptop with Intel GMA X4500HD card (which is said to be DirectX10-compliant, while my previous laptop had Intel 82852/855GM and no chance to play modern 3D games at all). It would be nice if I could play some games (like HalfLife 2, StarCraft 2, Fallout 3) from time to time (while I am ok using lo-fi settings and having low performance) but as I strongly prefer Ubuntu environment and don't need Windows usually I'd like to install Windows inside VirtualBox instead of using a dedicated partition and dual-boot. So the question is if VirtualBox can use 3D acceleration of Intel GMA X4500HD if run on Ubuntu.

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• No screens found error with glasen/intel-driver

  - by pgcudahy

  A lot of people seem to have had success in getting hardware acceleration for intel 82852/855GM chipsets with the ppa:glasen/intel-driver. I've tried it on my Motion Computing M1400 but get a "no screens found" error. I've found one person out there with a similar problem who seemed to fix it, but his solution is in German and seems to involve recompiling the kernel (it's at the bottom of the comments). Anyone able to see how to fix this without such drastic measures?

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• How can you easily determine the textureRect for tiled maps in SFML 2.0?

  - by ThePlan

  I'm working on creating a 2d map prototype, and I've come across the rendering bit of it. I have a tilesheet with tiles, each tile is 30x30 pixels, and there's a 1px border to delimitate them. In SFML the usual method of drawing a part of a tilesheet is declaring an IntRect with the rectangle coordinates then calling the setTextureRectangle() method to a sprite. In a small game it would work, but I have well over 45 tiles and adding more every day, I can't declare 45 intRects for every material, the map is not optimized yet, it would get even worse if I would have to call the setTextureRect() method, aside from declaring 45 rectangleInts. How could I simplify this task? All I need is a very simple and flexible solution for extracting a region of the tilesheet. Basically I have a Tile class. I create multiple instances of tiles (vectors) and each tile has a position and a material. I parse a map file and as I parse it I set the materials of the map according to the parsed map file, and all I need to do is render. Basically I need to do something like this: switch(tile.getMaterial()) { case GRASS: material_sprite.setTextureRect(something); window.draw(material_sprite); break; case WATER: material_sprite.setTextureRect(something); window.draw(material_sprite); break; // handle more cases }

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• How far can you get in iOS without learning PhotoShop or another graphic design program? [on hold]

  - by Aerovistae

  I'm in the process of learning iOS, and I'm coming from a web dev background where CSS controls 70-90% of the UI, and Python/C++ desktop dev where there are highly customizable UI toolkits for most things. I'm trying to figure out how people make good-looking apps without graphic design skills. You always hear about some 8 year old or 14 year old who made a successful app. So I assume that even if the required code was relatively basic, the app must have looked good if it was a success. But I find it really unlikely that these kids have advanced PhotoShop skills as well as having learned iOS programming at such a young age. Frankly, the same goes for most independent app developers....as they say, unicorns don't exist. So what's the deal? Can you make a good-looking, market quality app without those skills? What are the limitations?

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• What Shading/Rendering techniques are being used in this image?

  - by Rhakiras

  My previous question wasn't clear enough. From a rendering point of view what kind of techniques are used in this image as I would like to apply a similar style (I'm using OpenGL if that matters): http://alexcpeterson.com/ My specific questions are: How is that sun glare made? How does the planet look "cartoon" like? How does the space around the planet look warped/misted? How does the water look that good? I'm a beginner so any information/keywords on each question would be helpful so I can go off and learn more. Thanks

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• Unity 3D Display Lag

  - by ec2011

  I find that there is quite a lot of lag when using Unity after upgrading to Precise. It seems that when I first start up the computer, everything is fine, but then if I put the computer on standy for a while and then come back to it, the display is extremely slow and there is a significant delay to visual effects that make the system rather cumbersome to use. I tried to report this as a bug but then bug reporting tool directed me to ask this is a question here first. Thanks for any ideas

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• Blank Screen on 12.04

  - by stupidwhiteguy

  Can hit Ctrl-Alt-F1 and login but no fixes work. Tried nomodeset and everything else appears to have upgraded but can't see anything. I really need this computer to work. It is an old Dell with 1.6 processor with old school monitor. I don't know why people are giving my question negative votes. If you know how to fix this, then please help me, as I have read and tried all the solutions that I've found. Just for the record reformatting is not fixing it, and I can't get a boot CD to load either. If you know how to use the blank screen fix tutorial, please explain cos I'm lost. Most people don't understand this stuff and an easy "how-to" fix would be nice.

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• Help my graphists sharing their work

  - by Andy M

  As a developer I'm used to Subversion for source control and I think it's great for sharing source code between developers. Now thinking about my graphists and game designers, they need to have a slightly different approach I think. They need to share binary files They need to be able to have a thumbnail and preview of their work I don't want to include their binaries into my game repository (would be much too heavy for developer when updating) I've seen that some graphists uses personally created website to share their work but I was wondering if some "standard" application existed in order to provide my graphists a cool way of working together. Is there a common way of dealing with this? Is the way I want to do (only final sprites on my game repo) correct? How do you guys do this as game developers?

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• Ubuntu on low powered laptop

  - by zkent

  First off, I am new to Ubuntu. I come from a Windows background (DOS before that) and am loving it so far. I installed it on an older Dell laptop that I wanted to get another year out of. I set this machine up primarily as a LAMP development machine for a project I am working on. The machine is a Vostro 1500 and it has 4GB RAM (maxed) and an upgraded hard drive. I can't watch YouTube videos for long before it starts to overheat and start acting sporadic. I can live without YouTube but every so often the application switching (alt-tab) gets slower and begins not showing all applications and the Dash home quits displaying properly. I am sure I am asking a lot of this old machine. What I really want to know is: are there any settings in Ubuntu that allow me to lower the graphic effects (fade-ins, transparencies, fancy transitions, etc) that would be less taxing on the video card?

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• Why is text on my TV monitor all grainy?

  - by searchfgold6789

  I have successfully installed the Catalyst drivers and hooked up my 1080p TV to the Radeon HD 5750's HDMI port and now it is working. There only seems to be one issue - most images appear OK, at least to my eyes, but text is grainy and difficult to read (not sure how well it can be seen in the picture): It works fine with a smaller screen, and hopefully you can see it with the new pictures which are only slightly better, but images are rendered a little funny too. Changing antialiasing does nothing and changing the refresh rate only makes a slight change if any. The small monitor I have works fine. Smaller resolutions such as 1024x768 look OK but are the wrong aspect ratio. I have tried renaming the input mode on the TV to "PC", and that helped... a little bit. Also, I tried a different PC with the same result. Messing around extensively with the ATI Catalyst Control Center also did not help. I am wondering if there is anything else I can try to increase the quality so it is more usable.

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• Problem with ubuntu 12.04

  - by Luc1Hz

  It's first time when i use ubuntu.I downloaded and installed 12.04 version of ubuntu.It works fine but sometimes when i shut my pc down from ubuntu and i try to start it again,nothing shows on the screen.It's always black and it shoud appear Acer logo(i have acer aspire 5573)It's like the sistem is restart again and again but it can't boot ubuntu(or windows,i use dualboot)The meniu(where i can choose between windows and ubuntu it's not displayed because the pc don't start correctly.When this happens i shut down the pc definitively and i remove the battery and i put it again.Then everything works fine.How do i repair it?I think that could be a incompatibility with the pc because with windows everything works fine.Help please and sorry for my horrible english...Thanks!

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• Creating a WARP device in managed DirectX

  - by arex

  I have a very old graphic card that only supports shader model 2, but I need shader model 3 or up for the app I am developing. I tried to use a reference device but it seems to run very slowly, then I found some samples in C++ that allows me to change to a WARP device and the performance is good. I am using C# and I don't know how to create such type of device. So the question is: how do I create a WARP device in C#? Thanks in advance.

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• Splashing Liquid Using Cocos2d

  - by Maverick

  I am new to game development in iOS. My problem is that I want to give a water splash effect on the screen as like someone has just randomly thrown water from any corner of the screen. I will be grateful to know any tutorials, or libraries that wil help me achieving this effect. Thanks in advance. Edit: Sample Liquid Simulation I wanted to simulate the behavior like this IMAGE. Like a liquid is poured in glass. I hope it clears what I asked. Thanks for your precious time.

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• How can I efficiently create/store/implement animations as I add to my game?

  - by nickbadal

  My game's characters are made up of different parts (head/body/legs/etc), and whatever items they have equipped. As I'm creating the animation system for my game, I want to try to anticipate a large number of combinations for different pieces for each character. Originally, I had planned on having a frame-by frame animation for each piece for each animation, and then layer them to combine them into a character, but this seems like it would be a lot of work for my artist, and that the memory/disk size would start to add up as well since we would need a sprite for every frame, of every customization of every piece, in every animation, for every character. What efficient ways are there to create/implement these animations as we add more and more configurations to our game?

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• How do you blend multiple colors in HSV (polar) color-space?

  - by Toxikman

  In RGB color space, you can do a weighted multiple-color blend by just doing: Start with R = G = B = 0. Then we perform a blend at index i using a set of colors C, and a set of normalized weights w like so: R += w[i] * C[i].r G += w[i] * C[i].g B += w[i] * C[i].b But I'd like to interpolate the colors in the HSV color-space instead, so that saturation and brightness are uniform across the interpolation. I know I can blend saturation and brightness in the same way as above, but the HUE component is an angle around a continuous circle, since HSV is essentially a polar coordinate system. Blending only two HSV colors makes sense to me, you just find the shortest arc around the circle and interpolate between the two hues. But when you attempt to blend more than 2 colors, it becomes a bit of a puzzle. You have to handle anomalous cases, like 4 equally-weighted colors with a hue at 0, 90, 180, and 270 degrees. They basically cancel each other out, so any hue will do. Any ideas would be greatly appreciated.

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• How to disable VGA

  - by Bitmap

  If i run lspci | grep VGA I get below output which tells me below VGA cards are present on my computer. 01:00.0 VGA compatible controller: nVidia Corporation GT216 [GeForce GT 220] (rev a2) 08:02.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) The ES1000 is an onboard card which came with my machine. Do anyone know how to disable this VGA on my machine. The reason for this request is because if I run xrandr I get the output as shown below: xrandr: Failed to get size of gamma for output default Screen 0: minimum 320 x 240, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 0mm x 0mm 1024x768 50.0* 800x600 51.0 52.0 53.0 680x384 54.0 55.0 640x480 56.0 512x384 57.0 400x300 58.0 320x240 59.0 Which means I am not able to configure nVidia to accept smaller resolution. Thank you.

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• Intel Graphic card problem

  - by user10406

  Hello, I am facing a problem in installing the right driver for my computer "HP dv4 2154ca" The problem that I tried to install it couple of times but the xorg.conf file is still empty no matter what So my question is why is this file empty and how could I generate it correctly for my device The problem that I think this thing is causing is that when I maximize flash to full screen it lags the video will go slower while the sound will go smooth Thanks in advance

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• Running crysis 2 on ubuntu gives me an error message

  - by ShajD

  so i recently installed ubuntu alongside windows 7 and i installed crysis 2 with wine. crysis 2 works fine when i run windows, however when i run it using wine in ubuntu cryengine gives me a message saying, "Unsupported video card detected! Continuing to run migth lead to unexpected results or crashes....." i've got two video cards ones an intel and the other's a nvidia. i typed lspci into the terminal and my nvidia card was listed under video controller as well

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• W520 External monitor setup with Ubuntu 12.10

  - by user108372

  I just installed a fresh Ubuntu 12.10 64-Bit Desktop on my Lenovo W520. It looks like there are a lot of challenges around making it work with out of the box Nouveau drivers or propriety Nvidia drivers or Intel GPU. I looked at couple of notes on how to make it work with Bumblebee with Optimus Nvidia. None of them seems to work for 12.10. Anybody has a solid answer on this? It seems like a lot of people are suffering from this. Here is my xrandr output. Let me know if you need any additional information. Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.0*+ 59.9 50.0 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) Thanks, Sef

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• Fog with Blend in OpenGL

  - by MhdAljobory

  I want to add fog in my scene which contain transparent textures made by Blend , when i enable the fog the transparent textures appear white From a distance but when i disable it the textures appear well. What is the solution to the problem of whiteness? Fog Code: GLfloat fogColor[4]= {0.5f, 0.5f, 0.5f, 1.0f}; glClearColor(0.5f,0.5f,0.5f,1.0f); glFogi(GL_FOG_MODE, GL_LINEAR); glFogfv(GL_FOG_COLOR, fogColor); glFogf(GL_FOG_DENSITY, 0.35f); glHint(GL_FOG_HINT, GL_DONT_CARE); glFogf(GL_FOG_START, 1.0f); glFogf(GL_FOG_END, 1000.0f); glEnable(GL_FOG); Screenshot

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• Provide A Scrolling "Camera" View Over A 2D Game Map

  - by BitCrash

  I'm in the process of attempting to create a 2D MMO type game with Kryonet and some basic sprites, mostly for my own learning. I have the back end set up great (By my standards) and I'm moving on to actually getting some things drawn onto the map. I cannot for the life of me figure out a solid way to have a "Camera" follow a player around a large area. The view pane for the game is 640 x 480 pixels, and each tile is 32x32 pixels (Thats 20 tiles wide and 15 high for the viewpane) I have tried a couple things to do this, but they did not seem to work out so well. I had a JScrollPane with 9 "Viewpane"-sized canvases in it, and tried to have the JScrollPane move in accordance with the player. The issue came when I reached the end of the JScrollPane. I tried to "Flip" canvases, sending the canvas currrently drawing the player to the middle of the 9 and load the corresponding maps onto the other ones. It was slow and worked poorly. I'm looking for any advice or previous experience with this; any ideas? Thank you! Edit and Clarification: I did not mean to mention Kryonet, I was merely providing peripheral information in case there was something that would help which I could not foresee. Instead of having an array of 9 canvases, why not just have one large canvas loading a large map every once in a while? I'm willing to have "load times" where as with the canvas array I would have none (in theory) to give the user a smooth experience. I could just change the size and location of the map with a modified setBounds() call on the canvas in a layered pane (layered because I have hidden swing items, like inventories and stuff) I'll try it out and post here how it goes for people asking the same question.

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• How do i add a start menu page to my java game?

  - by user2149407

  I have a rather cool space invaders game that my friend and I have been working on for a while, and we have decided it needs an opening page, with "Start" options, "Quit" options and so forth. I have looked at several methods online, but cant seem to get any of them to work! Does anybody have any ideas? P.S Using JFrame to draw the main frame Im just looking to do this within Java, so just a panel that appears at a state change (GAME, MENU). Id like it to contain a few buttons to start the game, and quit. Later, I will add achievements, but im after something really basic for now. But thanks for the suggestions!

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• How do I install the NVIDIA driver for a GeForce 6200?

  - by 2d4skt

  I have been recently trying to find a solution for this on the web but did not find something useful or accurate for Ubuntu 11.10. I also consulted the NVIDIA help, but things there did not work for me. I installed the additional drivers from system settings but they are not fully compatible with my GeForce 6200. First I tried finding how to stop the X server. I succeeded, but another problem was the nouveau kernel. This is really frustrating. Can anybody tell me an accurate and authentic way to install NVIDIA drivers?

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