Re: [osg-users] Sharing vertex and normal buffer with another library

Hi Dženan, It's very hard to tell from the limited amount of code you have posted, since it seems to be missing so much, but - and apologies if I'm pointing out the obvious : a) You don't ever seem to attach your geode to the scene anywhere b) The scope of the osg::Geometry* geom in mcHelper

[osg-users] Render to VBO?

Dear All, Does OSG support rendering to a Vertex Buffer Object? I'm happy with regular texture RTT, but is rendering to VBO as simple as this: camera-setRenderTargetImplementation(osg::CameraNode::FRAME_BUFFER_OBJECT); camera-attach(osg::CameraNode::COLOR_BUFFER, m_texture); where

Re: [osg-users] Render to VBO?

Hi Robert I haven't tried rendering to VBO before but it's my understanding that the technique used to render to FBO, then copy the appropriate buffer to PBO, then re-assign this PBO as a VBO. You might be able to implement this right now using a post draw callback attached to an osg::Camera

Re: [osg-users] Render to VBO?

One other thought - is this render to FBO/copy to PBO/assign as VBO method likely to be any faster than rendering to texture and then using vertex texture fetch? I guess the answer will be just to try it and see... Regards, David ___ osg-users mailing

Re: [osg-users] Render to VBO?

Paul, Thanks for your input, but I think you've misunderstood me. I already use VBOs quite happily. The question is whether you can use a pre-render pixel stage to render directly into the vertex buffer (the technique is sometimes abbreviated RTVB); i.e. to use a fragment/pixel shader to populate

Re: [osg-users] 3d file formats supporting bump map

Hi Davide, Certainly the obj loader supports bump maps, but let me be clear about what it actually does. Apologies if this comes over as patronising; I have no idea of your level of expertise. In OSG/OpenGL land, textures (diffuse, bump map, specular map, etc.) are all attached to a particular

Re: [osg-users] osg::TextureCubeMap and HDR

Dear Peter, I think that some (older) graphics cards support floating point 2D textures, but not cube maps. I'm also aware that even if you do support floating point cube maps, many older cards can't do interpolation on them. Can you turn it to GL_NEAREST and see if that makes a difference?

Re: [osg-users] OSG_FEM

Hi Ugras, What you ask is slightly strange, and I apologies if this reply appears too patronising - it isn't meant to be! OSG is basically a rendering package; it just draws things. To try to interpret your question sensibly: 1) Can OSG import FEM meshes? I imagine that if your mesher can

Re: [osg-users] create a image

Martin, I think you want this: data[i] = 255;//red David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

Re: [osg-users] ViewerBase::stopThreading() and renderers

Cory, FWIW, I do what you do : I have an OpenThreads::Thread class which _has_ a viewer. The parent application starts this thread up, and lets it get on with viewer creation, frame dispatch, viewer deletion and so on. I had very similar problems to you a while ago ( 1 year? ) when I originally

Re: [osg-users] osgOcean release

Kim, it does sound difficult to implement as a general case. Actually, I think that the only way to meet all current techniques with as common a scenegraph structure as possible is to render the heightfield to texture (generated somehow, e.g. FFT on CPU, sum of sines, FFT on GPU), then use

Re: [osg-users] [osgPlugins] osgDB OBJ Plugin

Robert, At the moment the OBJ loader builds a material to stateset map, which is indexed by the material name. However when the stateset is applied to a geometry, the material name is effectively lost. Also the OBJ loader reads the group name (i.e. g groupname in the .obj) and any object name

Re: [osg-users] osgOcean release

Kim, For very large expanses of ocean the problem I forsee is the time it takes to update the vertices and primitive sets. However, since the FFT technique is tileable it would be possible to only update 1 tile and then translate them into position using a shader. This would rule out any

Re: [osg-users] osgOcean release

Kim, A nice piece of work. In case it helps anyone, for FFTW on Windows, I used 3.2.1. I didn't bother compiling it, but just did this: http://www.fftw.org/install/windows.html which worked fine (even with the free Visual C++ 9.0 ! ) I had a compile of minor issues with addCullCallback - I

Re: [osg-users] osgOcean release

Umit, I implemented my ocean surface which is composed of Sum of Sinus method Bear in mind that so long as your wave numbers are integer subdivisions of the tile size, the result from an FFT approach is the same as the result from a sum of sinusoids approach, just higher performance. David

Re: [osg-users] osgOcean release

Umit, ...Error : When I open up the osgOceanExample there is some error in vertex shader as you can see from the attached screenshot. I had something similar - I think this is just coz the shader constructor can't find the underlying shaders; AFAIK the resource folder has to be located in the

Re: [osg-users] How to maximize and minimize the window of the osg program

Hi. The WindowSizeHandler (in osgViewer/ViewerEventHandlers) does exactly this. Look at the toggleFullScreen method. Better yet, just add a WindowSizeHandler to your viewers event hander list with viewer.addEventHandler(new osgViewer::WindowSizeHandler()); Hope that helps, David

Re: [osg-users] Geometryconsidered in near+far plane auto computation

Hi J-S, The problem when the skydome renders last is that it won't be blended correctly with transparent objects (they need to be rendered after all opaque objects, and sorted back to front). Ah. I hadn't considered that in detail. (I wonder what my app's behaviour is then? I don't have many

Re: [osg-users] Geometryconsidered in near+far plane auto computation

Chris, After some brain-twisting, I did realize that even with z comparison off, OGL is probably rejecting the skydome because it's beyond the far clip plane. I've been trying to think of a way to fool this, but it seems like it is unavoidable. That's exactly what I found (or even

Re: [osg-users] Geometry considered in near+far plane auto computation

J-S (and others), You could look at doing this is the same way the depth partition node does it, which is what I do: I use a class based on an OSG camera with an overriden traverse method, that forces the projection matrix to a particular z near and z far. Oh, and the camera has

Re: [osg-users] HDR Skybox

Rob, What image format are you actually loading? Regards, David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

Re: [osg-users] Problems shutting down Composite Viewer/View/Custom drawables

Chuck, I have had similar issues (with crashes in releaseGLObjects when views get destroyed) but can't actually recall what I did to fix them. You could try calling viewer-releaseGLObjects() before you destroy the view. (previous posts seem to suggest that this might be the right thing to do)

Re: [osg-users] DoomLike manipulator

Hi, FYI, there was a posting of a (presumably similar) WASD type manipulater by Viggo Løvli back in August 08 - seach the archives for How to write a camera manipulator... David ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] Strange setImage behaviour

Robert, Not that I want to hijack the thread, but a small (more OpenGL) question on this area, as it has always confused me: The internalTextureFormat is the pixel type when stored down on the GPU. Typically it's be GL_RGB, or just 3 (number of components) for RGB data. Both the

Re: [osg-users] Strange setImage behaviour

Max, For starters, you probably want GL_RGB8 (0x8051) and not GL_TEXTURE_2D (0x0DE1) in your setImage call. But in general it looks a bit odd to me, and I'm not sure what your intention was. First you get the pointer to the textures image, and then you set it to something else. I imagine you

Re: [osg-users] Strange setImage behaviour

Okay, so something like this should work, I guess. void updateTexture( IplImage *img, ref_ptrNode geode) { ref_ptrStateSet state = geode-getOrCreateStateSet(); ref_ptrTexture2D Tex = (Texture2D*) state-getTextureAttribute(0,StateAttribute::TEXTURE); Tex-setImage(img);

Re: [osg-users] Float textures seem to be clamped in GLSL

Bryan, My initial thought was that nowhere were you saying that the image was floating point. Digging further, I realised that TransferFunction should be doing it for you - I've never used this before - but this line (in osg/TransferFunction1D.cpp) looks a little odd to me:

Re: [osg-users] osg::View NO_LIGHT bug?

Ben, osg::View's setLightingMode with NO_LIGHT as a parameter doesn't actually turn any lights off (just look at the source in osg/View.cpp). If the lightingMode is *not* NO_LIGHT, then it sets light 0 with the default 0.8 diffuse value etc. I presume this is by design, although I'm not sure why!

Re: [osg-users] Swapping Textutes for Thermal Signatures

Guy, You can also do it via shaders. Your model would have texture unit 0 = diffuse texture, and tex unit 1 = thermal texture. In the application you would set a uniform that declares which texture unit to use (e.g. uniform int TexUnit). The shader could then select the texture based on the tex

Re: [osg-users] osgPango (Stop Worrying Love The Bomb)

Jeremy, Thanks for that. I must admit I am a little bit confused between the various things that have been mentioned for text rendering, and would appreciate a one liner explanation of what the difference between osgPango and osgCairo is. Plus I've seen other libraries mentioned in this context

Re: [osg-users] Load uniform sampler2D in shader from .osg file

Joseba, Shouldn't this: gl_FragColor = vec4(texture2D( baseMap,*gl_TexCoord[0]*.st).xyz, 0.0); be this? gl_FragColor = vec4(texture2D( baseMap,*TexCoord*.st).xyz, 0.0); David ___ osg-users mailing list

Re: [osg-users] Anti-Grain and OpenSceneGraph

Jeremy, Kurt, I care too! I admit, I've been lurking on the font quality issues because in our apps I have very tight control of the text size and positioning, so can tweak the placement/resolution to get the right look. However developments in this area wld be extremely valuable to me in the

Re: [osg-users] Head mounted display for OSG...

Shayne, We use these (http://www.vuzix.com/iwear/products_vr920.html) experimentally, because they are cheap, and slightly surprisingly support quad buffer stereo, which means they more or less work with OSG (on Nvidia Quadro's, at least) straight out of the box. Unfortunately, most of our

Re: [osg-users] Help Rendering and Reading Floating Point Textures

Brian, JP, The osgmultiplerendertargets example uses (by default) GL_FLOAT_RGBA32_NV, rather than either GL_RGBA32F_ARB, or even GL_RGBA16F_ARB. Could this be a card issue? I would be interested to know whether this example works for you if you change to GL_RGBA32F_ARB or GL_RGBA16F_ARB. I

Re: [osg-users] Help Rendering and Reading Floating Point Textures

Brian, For some odd reason, a source type of GL_UNSIGNED_BYTE rather than _FLOAT seems to work for me for a internal format of GL_RGBA16F_ARB, so you might want to give that a go. David ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] Mesh/Triangulation Examples?

Simon, For the geometry, I do this, more or less: osg::ref_ptrosg::Geometry geometry = new osg::Geometry(); osg::ref_ptrosg::Vec3Array vertices = new osg::Vec3Array;// unsized array of vertices vertices-push_back(osg::Vec3(x,y,z)); // etc, ...

Re: [osg-users] Multipass Rendering objects that intersect given shapes/bounding volumes

am I understanding correctly that what's primarily done is to use the Z-buffer to cut down on the amount of geometry that has to be lit? From what I understant, that's not quite it. You render the scene with no lighting, but enough info per pixel to sort out the lighting later (in one

Re: [osg-users] Multipass Rendering objects that intersect given shapes/bounding volumes

Chris, Not that it really answers your direct question, but have you tried looking at a deferred rendering approach? With that many lights I would have thought the performance benefits would be good. David ___ osg-users mailing list

Re: [osg-users] Math problem relative to OSG

Hi Vincent, The only thing I can offer is that you have to be careful when you check your node position/rotation, and when you apply your manipulator update. For example, if your order is eventTraversal and then updateTraversal, then your manipulator may be one frame out (i.e. changing based on

Re: [osg-users] Performance query : Drawing lots of instances of avertex array

Robert, Digging through the code now - looks exactly the kind of thing I was after, so thanks! David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

[osg-users] Performance query : Drawing lots of instances of a vertex array

Dear All, I have a geometry with a simple heightfield type vertex array; I'm also using VBO. I want to repeat that VBO in quite a lot of places. The heighfield can be considered as a terrain tile (e.g. 100m x 100m) , with which I want to tile a much larger area (e.g. 1km x 1km). The method I

Re: [osg-users] Performance query : Drawing lots of instances of avertex array

Paul, If this was raw OpenGL, I'd be tempted to set up my heightfield as a display list, and then change the modelview matrix for each call to the display list. I'm not quite sure how to force similar behaviour in OSG other than to set up the scenegraph with multiple PATs. I'm working on a

Re: [osg-users] Effects of locale setting

Robert, Only just caught this thread. I'm happy to update the OBJ plugin (reader only, presumably) if you want to lose the sscanf, as it's only recently I was looking at it anyway. I assume that you want all sscanf(blah, %f, my_float); to be replaced by sscanf(blah, %s, my_char);

Re: [osg-users] StateSetSwitchNode suggestion.

Viggo, I guess I must be missing something, because I'm not sure why you can't just use a combination of a switch node with several children, each of which is parent to the (same) scenegraph. Then each child can have its own shaders and state, which the switch selects between. If you are trying

Re: [osg-users] Slave views

Alberto, When compiling against SVN, the two are shown, but a crash happens when pressing 's' several times I think (someone correct me if I'm wrong) that this is a known issue, and something to do with the thread safety of the stats handler, and/or NVIDIA drivers. If the former is still the

Re: [osg-users] Shader Uniform Performance Question(s)

Paul, From my perspective : How much overhead is there in having a uniform? GLSL? Not much. If there only a performance hit if the uniform changes values or every frame. What if I change the Uniform in OSG to exactly the same value it already has, would there be a performance hit? I

Re: [osg-users] Transparency and lighting off compatible ?

Hi Vincent, If you don't want lighting to affect your skysphere, you should turn it off. skysphere-getOrCreateStateSet-setMode( GL_LIGHTING, osg::StateAttribute::OFF ); To make it transparent, you need to enable a blend function, as well as tell OSG to put it in the transparent bin so that it

Re: [osg-users] Shader Uniform Performance Question(s)

Umit, Sorry to be picky, but: Firstly, uniform variables are intented to using in rarely changing values, and attributes is used while needing frequently changing values. Not quite. Lots of the fixed-function uniforms - which are deprecated under GL3 - potentially change every frame (

[osg-users] Stereo : Meaning of field sequential, I-visor

Dear All, I'm a bit new to stereo modes (so take pity on me), but are any of the OSG supported stereo modes (QUAD_BUFFER, *_INTERLACE, *_SPLIT, *_EYE, ANAGLYPHIC) the same thing as field sequential? I guess I know that the interlace/split/anaglyphic ones are out, but I was not sure what

Re: [osg-users] Stereo : Meaning of field sequential, I-visor

Jan, Thanks for the very informative reply. Unfortunately, what they do not tell you in their sales pitch is that you need at least one of the high-end Quadros (about 800 USD+ investment for the cheapest one) to have this to work - the lower end stuff doesn't support stereo ... We have it

Re: [osg-users] Stereo : Meaning of field sequential, I-visor

Thanks for the help. That all worked, more or less out-of-the-box, using QUAD_BUFFER. As suggested, we had to enable stereo in the OpenGL driver. I was slightly misinformed about the actual hardware, what we are actually using is this : http://www.vuzix.com/iwear/products_vr920.html, which also

Re: [osg-users] osg Collada Plugin

Steffen, Are you still going via collada? Unfortunately I know nothing about the Collada import route and how it handles lights defined in a model file. Does the same thing happen with only one light? I suspect that OpenGL is just (correctly) adding up all the contributions from the various

Re: [osg-users] Dynamically changing all textures in a scene

The osg Depictions thread is here : http://www.mail-archive.com/[EMAIL PROTECTED]/msg10685.html Ok, switching every stateset would be what I am looking to do. Composing the texture in the shader would mean we loose the desired ability to use image files. Agreed, but if your model had (for

Re: [osg-users] Writing dds textures - they're bigger than the originals?

Hi Brett, Shots in the dark: 1) might the incoming textures be DXT_ compressed, whereas the output is uncompressed? 2) might the outgoing textures include the mimaps? (DDS can include them) (not sure you'd get 3x, though) David ___ osg-users mailing

Re: [osg-users] composite view and cameras question

Peter, You could have a look at the osgdepthpartition example, which does something similar, although for different reasons - I think this was originally due to precision issues for very large scenes, but its use of multiple z ranges might help your problem. David

Re: [osg-users] Real size model how to??

Hi Orendavd, What do you mean it always shows the same size? What are you doing exactly? Firstly, if you are just using osgviewer to view your 3ds model, be aware that it will place the camera such that the loaded model always looks like its the same size. You need to load it up with another

Re: [osg-users] Disable self shadows (ShadowMap)

Jefferson, I'm sure that Jean-Sebastien or Wojciech can answer better and more correctly than me, but in the meantime... Firstly, I notice that you are using OSG 2.6. The versatility of the API into the shadowing stuff is much better in the 2.7 versions, and allows you better control over what

Re: [osg-users] problem with image

Miriam, Just on the off chance that your problem is really simple: in my application I am applying a texture (. bmp) to a sphere, and osg::Image* img = osgDB::readImageFile(rfi.TGA You say your applying a .bmp, but you're trying to load a .tga. Could that be it? David

Re: [osg-users] choppiness on 2nd graphics card with 4 monitors

Joe, Just out of interest, do you get the same issue with just one monitor connected to each graphics card? ( I'm interested because I _think_ I get something similar in this configuration, but it might be a separate issue). I have the same setup as you (dual 8800, VIsta, etc.) Are you running

Re: [osg-users] Advice on interacting with osgShadow

Dear Wojciech, J-S, All classes belonging to ViewDependentShadow group derive shaders from StandardShadowMap. If you look at these shaders you will notice that they are split into main vertex and fragment shader and shadow vertex and fragment shader. I saw this. Maybe I'm being daft, but

Re: [osg-users] Advice on interacting with osgShadow

Wojtek, Just grab them from StandardShadowMap via getShadowVertexShader() getShadowFragmentShader(). Ah. I missed that. Perils of browsing source via the website, I guess... Thanks, David ___ osg-users mailing list

Re: [osg-users] The best way to make some object in a scene render after and infront everything else.

Chris, You can achieve this affect several ways... (aside : http://www.netpoets.com/classic/poems/008003.htm ) Another way is to use osg::Depth to force the z value of your overlaid stuff to zero, hence ensuring it is always there. David ___

Re: [osg-users] Advice on interacting with osgShadow

Hi J-S, Wojciech, Thanks for the help. I've got shadow maps working (I'm on 2.6.1) and when I get round to it, I'll migrate up to the 2.7 ViewDependant stuff and see if I can get the other techniques working as well. Now, an add-on library could be written that would help unify the art

[osg-users] Performance penalty from non-contiguous texture units in multitextured model?

Dear All, Probably more an OpenGL question, but is there a penalty (performance, memory etc.) incurred from using non-contiguous texture units in a multitextured model? For example, instead of binding a diffuse texture in unit 0 and a bump/normal/shadow map in texture 1, one could bind the

Re: [osg-users] Opposing techniques for rendering a reflective floor

Hi Alex, Note that doing (1) doesn't preclude RTT - e.g. you can RTT the whole inverted scene to a texture and then generate appropriate texcoords on the mirror, either by hand since your camera is fixed, or in a shader. Plus I'm not sure why you think that (1) is quite a few additional render

Re: [osg-users] Shader issue

Hiya Sajjad, Perhaps an easy way is to have a (multi)switch node whose value is triggered by the GUI event. The switch would have several children, each of which would be a separate group node. Each group node would have your target model as it's only child. Then you would load up a variety of

Re: [osg-users] Strips on AnimatedTexturing on Terrain by GLSL

Umit, It's a well known gotcha with texture repeats. Each vertex has increasing causticsCoord.x. Imagine the vertices with coord 0.0, 0.1, 0.2, 0.3 etc. The fragments in between any of these coords have _interpolated_ texcoords i.e. a fragment halfway betwen 0.0 and 0.1 vertex has a texcoord of

Re: [osg-users] Another case for extendable plugin loaders... Was Re:DDS textures flipped on flt files

Ah! I learn something every day... Is there any system-wide check (other than by eye, at checkin) that makes sure that all of the options are unique to each loader? e.g. there isn't a dds_flip option in, say, the .ac3d loader? David ___ osg-users

[osg-users] Advice on interacting with osgShadow

Dear All, I'm just picking up osgShadow, and have a couple of questions that I would appreciate some advice on. The intention is to use one of the ShadowMap type methods. Case1 : Shadow casters already have expensive fragment shaders In the case where the objects that are casting shadows have

Re: [osg-users] Advice on interacting with osgShadow

Dear J-S, Thanks for the help. If you're using the ViewDependentShadow techniques, they already disable shaders while rendering the shadow pass. Ah - I hadn't spotted that in the code yet. So no problems there then. While I'm here, is there any reason why the shaded objects shouldn't do the

Re: [osg-users] Shaders, osg::notify and IP

Colin, At last! A genuine requirement for obfuscated C skills! ( http://en.wikipedia.org/wiki/International_Obfuscated_C_Code_Contest) Time to start misusing the GLSL preprocessor... David ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] Question about plane intersections

John, If you just want it visually in a map style format, you can texture the hill with a banded texture, generate the texcoordinates based on a texgen node, and then view it in ortho from the top. David ___ osg-users mailing list

Re: [osg-users] OSG 2.6 API Documentation in HTML, HTML Help and PDF format

Ernst, Your 1.2 docs have been a permanent shortcut on my desktop for several years now, so many thanks for doing the same for 2.6! David ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] Floating Point Texture Format

OSG also writes Radiance format (.hdr) David ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

Re: [osg-users] Which File Formats / Plugins support multi-texture?

Dear All, Current observations: 1) The OSG 2.6 .obj loader loads two textures : a diffuse map, into texture unit 0, and an opacity map into texture unit 1. The OBJ format supports a variety of other texture maps (e.g bump, map_Ks, etc.). This map-to-texture-unit correspondence is _hardcoded_ in

Re: [osg-users] Drawables not drawn in debug build

Barkah, I guess that you are using the prebuilt 3rd party binaries. If this is right, note that these have been built with VS2005 and are probably incompatible with VS2008. Do all the examples all run OK both in debug and release? David ___ osg-users

Re: [osg-users] Segfaults in osg::State::applyTextureAttributes when working with osgText::Text

Alex, There was a whole load of message traffic on this topic a while ago. From what I remember, the upshot was that the freetype library wasn't thread safe. I don't know whether it all got finally resolved or not; my advice would be to check the archives. David

Re: [osg-users] sky model tracking the camera...

Look in the osghandglide example for MoveEarthySkyWithEyePointTransform; you will need to add the z-coordinate transform as well (currently 0.0 in the code). David ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] A problem related to the ive file size and loading speed

Fangqin, Can't comment about your file size, but you could save yourself a step by doing osgconv My3DSFile.3ds MyIVEFile.ive directly... David ___ osg-users mailing list osg-users@lists.openscenegraph.org

[osg-users] Using SSE within OSG

Dear All, There's a discussion going on at the moment over in osg-submissions, and it has been raised that this ought to be opened up to the non-submissions community for feedback. Note that the following is my reading of the issues, and certainly doesn't represent the consensus view of the

Re: [osg-users] Using SSE within OSG

Benjamin, may I suggest that you check the assembler code that the compilers create when compiling the OSG code? ... g++ with -march=core2 -O3 (see man page for description of parameters) the compiler automatically uses SSE I don't have much recent Linux/gcc experience, but can

Re: [osg-users] Using SSE within OSG

Benjamin, And please do not get me wrong. I do not want to stop your efforts to improve the performance of OSG; far from it! Not necessarily my efforts - I'm just being the messenger...! But putting assembler code into the project decrease the readability and serviceability of the code.

Re: [osg-users] Using SSE within OSG

James, I have to disagree, using VS 7 and up to VS 9. Just to clarify - what are you disagreeing with? Do you find that MS compilers will produce SSE vectorised code _without_ use of intrinsics or raw __asm? David ___ osg-users mailing list

Re: [osg-users] [osg-submissions] Matrixf multiply Optimization

I think that this general question (of SSE integration) ought to be pushed out onto the osg-users mailing list. For example, I can't see any reason why all Vec4f and Matrix4f can't always be aligned anyway, although I realise that my range of apps might be limited. Even Vec4d and Matrix 4d might

Re: [osg-users] [osg-submissions] Matrixf multiply Optimization

MS uses _aligned_malloc (and _aligned_free), _declspec(align(16)). I think gcc uses something like __attribute__((__aligned__(16))), but I'm not sure whether that's OK for dynamic allocation. Intel's MKL, and others, provide cross-platform aligned mallocs, so we might be able to find something

Re: [osg-users] glPointSize no longer working for me?

I had something possibly similar a while ago - search the archives for GLSL Shaders and Points (repost), or go to http://osgcvs.no-ip.com/osgarchiver/archives/July2005/0003.html It might be related to what you are doing. David ___ osg-users mailing

Re: [osg-users] About Changing Parental Nodes?

If I understand your problem correctly, the general approach would be to compute the coordinate system matrix local to a group prior to a move (with computeWorldToLocal) - call it A - then to move the node, recompute the coordinate system in the new location - call this B - and apply the correct

Re: [osg-users] Render to Texture

Paul, FYI, the HDR (Radiance format) plugin also supports writing 32Fs, which can be viewed with a number of applications. I think I also saw a recent submission that allowed the TIFF plugin to write floats, but I might be mistaken. David ___ osg-users

Re: [osg-users] Problem setting a skydome

Alberto, I presume that your skydome has some sort of camera centred transform over it (as per osghangglide's example use); your code doesn't show it. osg::ClearNode* clearNode = new osg::ClearNode; clearNode-setRequiresClear(false); This is odd. If your camera is the first thing to

Re: [osg-users] Problem setting a skydome

Alberto, skydome-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR). a class osg::Camera inherits from Sorry - missed a step. Put a Camera in above your skydome. A solution that comes to my mind is to use a pair of cameras, one rendering the skydome with the setting you

Re: [osg-users] FindNodeVisitor Operation?

Hi Ümit, osg::DOFTransform is a subclass of the more general osg::MatrixTransform. If I'm reading the intention of the model right, you have 2 MatrixTransform nodes - named *3DSPIVOTPOINT: Rotate* and *3DSPIVOTPOINT: Translate pivotpoint to (world) origin* above some geometry *1_planetar*.

Re: [osg-users] FindNodeVisitor Operation?

Ümit, Firstly, do you need to add MatrixTransforms above all your geodes, or just the ones that have them now? You have a couple of strategies. The first one is to modify your model so it has uniquely named _MatrixTransforms_ above every geode. At the moment they are all called the same thing,

Re: [osg-users] Problem setting a skydome

Alberto, Firstly, you need to prevent the CullVisitor from considering your skydome in it's autonear/far calculation. You can do this with skydome-setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR). You will also need to mimic being a long way away via, most simply by drawing

Re: [osg-users] get a Texel from an osg::Image

Ming, So long as you know that the image format is GL_RGBA8, and 2D, you can do something like: osg::Vec4 returnColour(int row, int col) { unsigned char* pSrc = (unsigned char*) image-data(row,col); float r = (float) *pSrc++/255.0f; float g = (float) *pSrc++/255.0f;

[osg-users] How to byte-align Vec4Array

Dear All, Is there an obvious way of aligning the contents of the Vec4Array to 16 byte boundaries? Can I also guarantee that each std::vector entry will be contiguous in memory? i.e. I would like to make sure that array[0].x(), array[1].x() etc. are all on consecutive 16 byte boundaries. (I'm

Re: [osg-users] How to byte-align Vec4Array

Hi Gordon, Thibault, Thanks for the replies regarding the contiguity of the memory in a std::vector. That at least solves half of the problem. Use yourvector[0] to get a float* pointer to the beginning of the array. How do I define the vec4array so that yourvector[0] is absolutely aligned,

Re: [osg-users] How to byte-align Vec4Array

All, I've been OSGing for long enough that perhaps I shouldn't be quite so surprised, but I'm still always a bit amazed about the ready availability of support: Q: I need to defroogle my impfusculator. Can I do this in OSG? A: Yes - see examples/defroogleFusculator.cpp. (Although perhaps its an

Re: [osg-users] how to disable zbuffer

If you just disable depth testing, or make the fragments always pass depth testing via ALWAYS, you still don't get the effect that the object is always visible, do you? It presumably will depend on its position in the scenegraph and the relative order of drawing. That's why HUDs are often done in

[osg-users] Some yes/no questions about VBOs

Dear All, I have a few VBO related questions; a few quick yes/no answers would be much appreciated to stop me going down dead ends... I attach a vertex array, texcoord array and normal array to a Drawable, which is using VBOs. From the code, I can see that calling dirty() on any of the arrays

Re: [osg-users] Some yes/no questions about VBOs

Robert, 2) Am I right in thinking that limiting the upload to one of the arrays would involve extending BufferObject to use glBufferSubData, as it isn't currently supported? I should already work in 2.4 onwards. Fabulous! I'm on 2.2 at the moment; I'll upgrade immediately! Thanks for

  1   2   >