Re: [osg-users] probs running OSG on non-dev system?
Hi, Thanks for the suggestion, but now my problem wont repro, so I guess that isn't the problem. But a further question, are manifests relevant to native win32 binaries, or windows managed assemblies? If the former, then that including of a manifest better be captured the cmake build process somewhere. manifests are even relevant to native win32 binaries beginning with w2k. You can distribute the msvcrt80.dll beneath your exe iff you provide it with a manifest. If you don't windows will not accept the dll. This is called you are distributing a private assembly. The manifest is even more relevant for Vista: It is used for the User Access Control, if you need to run with admin priviledges. Cheers Olaf ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Object Array
On 9/17/07, Carlos Nava [EMAIL PROTECTED] wrote: Hi, I need to declare arrays of various types of objects, like transformations and groups, can you help me? C++ question really: typedef std::list osg::ref_ptrosg::Transform TransformList; ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for use as texture
HI John, Um... there really isn't much to go on to know why your app might be crashing, a good place to start is to provide a stack trace. Robert. On 9/17/07, John Steinbis [EMAIL PROTECTED] wrote: Hi, I'm trying to convert an IplImage (OpenCV) type to osg::Image type for use as a texture within OSG. My conversion routine attempts to utilize setImage(...) of image class. It crashes and I havent been able to track down the problem. Does anyone have experience with a conversion like this or advise about building osg images from other types? Thank you! -- John ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for use as texture
Hi, Just in case, Have you check the format of yours iplImage ? Because there is two main difference between an osg::image and an iplImage : the origin of a iplImage is the top left corner of the screen (down left corner for osg) and the colors are BGR (RGB for osg). And I also remember a similar crash when I used setImage(). Perhaps its the same thing : the third dimension of the image must be 1 and not 0, like this : osg::Image* image= new osg::Image(); image-allocateImage(width, height, 1, GL_RGB, GL_UNSIGNED_CHAR); ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] FBO question
Igor Naigovzin wrote:
Hello to all!
I have a simple question.
I want to render a two cameras (two different render surfaces) by exactly
the same scene.
Hi Igor,
if I understand you correctly, you're doing the same sort of thing I am. I have
a few cameras rendering to the same texture.
This is the code I use:
ref_ptrGraphicsContext::Traits traits = new GraphicsContext::Traits;
traits-x = 500;
traits-y = 800;
traits-width = totalWidth;
traits-height = vpHeight;
traits-windowDecoration = true;
traits-doubleBuffer = true;
traits-sharedContext = 0;
ref_ptrGraphicsContext _gc =
GraphicsContext::createGraphicsContext(traits.get());
osgViewer::Viewer _viewer;
for (int i = 0; i _numCameras; ++i) {
rot.makeRotate(_startAng + (_angStep * i), 0.0, 1.0, 0.0);
ref_ptrCamera cam = new Camera;
cam-setViewport(new Viewport(_cameraWidth * i, 0.0, _cameraWidth,
_totalHeight));
cam-setRenderOrder(osg::Camera::PRE_RENDER);
cam-setGraphicsContext(_gc);
cam-setAllowEventFocus(false);
cam-setRenderTargetImplementation(Camera::FRAME_BUFFER_OBJECT);
cam-attach(Camera::COLOR_BUFFER, _texture.get());
cam-setDataVariance(Object::DYNAMIC);
cam-addChild(group.get());
_viewer.addSlave(cam.get(), Matrixd(), rot, false);
}
_viewer.getCamera()-setProjectionMatrixAsPerspective(_cameraFoVX /
_aspectRatio, _aspectRatio, 1.0, 1000.0);
_viewer.getCamera()-setViewMatrix(trans);
_viewer.getCamera()-setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
_viewer.getCamera()-setClearColor(Vec4(FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX));
_viewer.setDataVariance(Object::DYNAMIC);
I'm using a floating-point texture, but it works just as well with a regular
8-bit RGB texture. Note I'm setting up the viewports for each camera. My
application is a piecewise linear approximation of a cylindrical projection.
I then set up another viewer and another scene graph to render the textured
quad to the screen, then call _both_ viewers in my render loop.
Hope this helps,
-J
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Re: [osg-users] Addition and Subtraction
Hi Renan If it just for display your CSG operation, there are openCSGhttp://www.opencsg.org/ If it is for building a eometrey then display it, there are effectively BRL CAD, or OpenCascade http://www.opencascade.org/. The best I found is CGAL http://www.cgal.org/ but it have a double licence like Qt, depending if you do opensource or close source application. HTH David 2007/9/16, Renan Mendes [EMAIL PROTECTED]: I'll check into that. Thanks, both of you. Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] multipass calculating with shaders
Hi, first I would like to reask the question I sent few days ago since it might have been overlooked so here it is: Hello, in the osg examples there are several examples of how to use RTT. I would like to concatenate several renderings. I mean, render the scene to texture1, then use texture1 to create texture2, then use texture1 texture2 to create texture3 and so on. I don't understand how to control the order of the rendering. I tried to change the rendering order number of the camera's I used in PRE_RENDER and it didn't seem to have any effect. The results seems fine, but I don't know if it used the data in the texture from the current frame or the previous. (in the example I made to check this ability, I render the cow to texture, then using PRE_REND ER shader I remove the red plane and later I remove the green plane, changing the order should result in different images) this brings me to the next question. I tried to clear the texture used to render the Scene to. I tried setting the texture image to new allocated image, dirty the texture parameters and dirty the texture object and nothing seems to have the required result. dirty the texture object results as blank screen, the other operation doesn't seem to clear the texture since changing the order in the multipass didn't change the results. another problem I had was to render in different passes to the same texture. (Even if it was in the POST_RENDER sub tree). is there a way to reuse the same texture in different passes? the last problem I encountered is that I rendered the resulting textures, using several cameras NESTED_RENDER each drawing a square with different texture attached 2 it and each camera has different viewport. The problem is the is the cameras viewport intersected, I couldn't change the order they are rendered (to make one of them on top of the other). I tried setting the RenderDetaill with higher and lower numbers, both for the Camera and for the Geodes, with no success. any ideas concerning any of the problems would be appriciated. thanks, Guy. second, I want to render single or several (4 - 8) values which represnt some calculation. So I use render to texture. The texture is 1D and to render to it I use orthographic projection, and the viewport fits to the texture dimension. The geometry I render is points. One point per calculation, and each point should result as one pixel. Is this the right way? I has to set the point size to 1.5 to see anything, any ideas why? thanks, Guy. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for useas texture
Hi John,
I wrote a osgImage2IplImage, not sure if it could help you, but here it is:
/*! Image conversion functions
Utility functions to convert between different image representations */
IplImage* osgImage2IplImage(const osg::Image p_osgImage)
{
const unsigned char *buffer = p_osgImage.data();
IplImage* pImg = cvCreateImage(cvSize(p_osgImage.s(), p_osgImage.t()),
IPL_DEPTH_8U, p_osgImage.r() );
if(p_osgImage.r() == 3)
{
struct pixelStruct { unsigned char r, g, b; };
struct pixelStruct* pPixel = ( struct pixelStruct * ) ( buffer );
struct pixelStruct* pCurrentPixel = NULL;
for(int x = 0; x p_osgImage.s(); x++ ) {
for(int y = 0; y p_osgImage.t(); y++ ) {
pCurrentPixel = pPixel[ y * p_osgImage.s() + x ];
int invertedY = p_osgImage.t()-1-y;
// blue
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3] =
pCurrentPixel-b;
// green
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+1] =
pCurrentPixel-g;
// red
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+2] =
pCurrentPixel-r;
}
}
}
else if(p_osgImage.r() == 4)
{
struct pixelStruct { unsigned char r, g, b, a; };
struct pixelStruct* pPixel = ( struct pixelStruct * ) ( buffer );
struct pixelStruct* pCurrentPixel = NULL;
for(int x = 0; x p_osgImage.s(); x++ ) {
for(int y = 0; y p_osgImage.t(); y++ ) {
pCurrentPixel = pPixel[ y * p_osgImage.s() + x ];
int invertedY = p_osgImage.t()-1-y;
// alpha
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3] =
pCurrentPixel-a;
// blue
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+1] =
pCurrentPixel-b;
// green
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+2] =
pCurrentPixel-g;
// red
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+3] =
pCurrentPixel-r;
}
}
}
else
{
osg::notify(osg::NOTICE)osgImage2IplImage: Error, unrecognized image
depth.std::endl;
}
return pImg;
}
bill
-Original Message-
From: [EMAIL PROTECTED] on behalf of John Steinbis
Sent: Sun 9/16/2007 9:23 PM
To: OpenSceneGraph Users
Subject: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for useas
texture
Hi,
I'm trying to convert an IplImage (OpenCV) type to osg::Image type for
use as a texture within OSG. My conversion routine attempts to utilize
setImage(...) of image class. It crashes and I havent been able to
track down the problem.
Does anyone have experience with a conversion like this or advise
about building osg images from other types? Thank you!
-- John
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Re: [osg-users] multipass calculating with shaders
thanks, I'll try that. more problems I'm facing is setting the image internal data type, I've seen in the examples setting the internal type to 3 or 4. what does it mean? how do I set it to float or int? and I couldn't read from the image even that I used code very similar to osgprerender example :(, the image-data() return buffer filled with garbage. but thanks anyway, Guy. - Original Message - From: John Donovan [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Monday, September 17, 2007 3:43 PM Subject: Re: [osg-users] multipass calculating with shaders [EMAIL PROTECTED] wrote: second, I want to render single or several (4 - 8) values which represnt some calculation. So I use render to texture. The texture is 1D and to render to it I use orthographic projection, and the viewport fits to the texture dimension. The geometry I render is points. One point per calculation, and each point should result as one pixel. Is this the right way? I has to set the point size to 1.5 to see anything, any ideas why? It sounds like you need to offset your point centres by 0.5 I don't have the spec in front of me, but I think you've got to shift it in the positive direction on both axes, but you may have to play with the signs until it works :) -J __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] multipass calculating with shaders
[EMAIL PROTECTED] wrote: thanks, I'll try that. more problems I'm facing is setting the image internal data type, I've seen in the examples setting the internal type to 3 or 4. what does it mean? how do I set it to float or int? I use the following code for rendering to a floating-point texture: _texture = new Texture2D; _texture-setResizeNonPowerOfTwoHint(false); _texture-setTextureSize(_totalWidth, _totalHeight); _texture-setSourceType(GL_FLOAT); _texture-setSourceFormat(GL_RGB); _texture-setInternalFormat(GL_RGB32F_ARB); _texture-setFilter(Texture2D::MIN_FILTER, Texture2D::NEAREST); _texture-setFilter(Texture2D::MAG_FILTER, Texture2D::NEAREST); and I couldn't read from the image even that I used code very similar to osgprerender example :(, the image-data() return buffer filled with garbage. If I understand it correctly, the Image associated with a Texture is used for uploading the data into the texture. If you want to read from the texture, you'll need to copy it to a buffer. I can't remember how to do that off-hand, but it'll likely be fairly slow. -J __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Background image texture rescaling problem
Robert Osfield wrote: Hi John, On 9/15/07, John Steinbis [EMAIL PROTECTED] wrote: Thanks Robert, I have this working now without rescaling the image. My solution was to pad the image with zeros making it a power of two and then specify the correct percentage of the image to use as 2D texture. Not sure if this is the best solution but it works and is fast enough for me. This is not an elegant way to tackle the problem, workable yes, but I'd recommend spending a little time - readying up about TextureRectangle or just disabling the resize of non power of two textures, you'll end up with a more efficient and elegant solution. I've used two of these methods to avoid the resizing penalty. The first was to use John's solution to create power-of-two images and only fill it with a subimage that is actually used. I then use the texture matrix to change the texture coordinates so no recoding is necessary. This has worked very well for my application. The second method was to use the TextureRectangle solution, but there are a few drawbacks to this method: it may not be hardware-accelerated, especially on older cards; you lose the ability to generate mipmapped textures; and your texture coordinates become non-normalized, so that you have to know the size of the image when you set up your scene if you do anything fancy. Texture Rectangles are useful but are not the ultimate solution to all problems. Eric ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] release and flush GL Objects?
Hi Robert, We are using the osgViewer::Viewer to integrate our app with Java using jogl to create a GL context and GraphicsWindowEmbedded class. In the past using the SimpleViewer we had the call releaseAllGLObjects(), which internally calls to sceneView-releaseAllGLObjects() and some more stuff. Is there any similar call inside osgViewer::Viewer?, with jogl there is an special Panel that use internally pbuffers to create the context, but when we resize the component the context is lost, so calling releaseGLObjects did the trick for us, but now I don't find a good way to get the same things working. I tried with viewer-getCamera()-releaseGLObjects(); but doesn't work. Maybe adding a releaseAllGLObjects method in View, or in Viewer is a good place. thoughts? Rafa. -- Rafael Gaitán Linares Instituto de Automática e Informática Industrial http://www.ai2.upv.es Ciudad Politécnica de la Innovación Universidad Politécnica de Valencia ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] release and flush GL Objects?
Hi Rafa, I'm not 100% sure it will work but try: viewer-getSceneData()-releaseAllGLObjects(); Robert. On 9/17/07, Rafa Gaitan [EMAIL PROTECTED] wrote: Hi Robert, We are using the osgViewer::Viewer to integrate our app with Java using jogl to create a GL context and GraphicsWindowEmbedded class. In the past using the SimpleViewer we had the call releaseAllGLObjects(), which internally calls to sceneView-releaseAllGLObjects() and some more stuff. Is there any similar call inside osgViewer::Viewer?, with jogl there is an special Panel that use internally pbuffers to create the context, but when we resize the component the context is lost, so calling releaseGLObjects did the trick for us, but now I don't find a good way to get the same things working. I tried with viewer-getCamera()-releaseGLObjects(); but doesn't work. Maybe adding a releaseAllGLObjects method in View, or in Viewer is a good place. thoughts? Rafa. -- Rafael Gaitán Linares Instituto de Automática e Informática Industrial http://www.ai2.upv.es Ciudad Politécnica de la Innovación Universidad Politécnica de Valencia ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] release and flush GL Objects?
Hi Robert, On 9/17/07, Robert Osfield [EMAIL PROTECTED] wrote: Hi Rafa, I'm not 100% sure it will work but try: viewer-getSceneData()-releaseAllGLObjects(); Node doesn't have a releaseAllGLObjects, and trying with releaseGLObjects, doesn't work as I expect. Maybe I'm using a bad approach to the problem! :(. releaseAllGLObjects method is only inside SceneView class which is not easily accessible in the osgViewer::Viewer. Thanks, Rafa. Robert. On 9/17/07, Rafa Gaitan [EMAIL PROTECTED] wrote: Hi Robert, We are using the osgViewer::Viewer to integrate our app with Java using jogl to create a GL context and GraphicsWindowEmbedded class. In the past using the SimpleViewer we had the call releaseAllGLObjects(), which internally calls to sceneView-releaseAllGLObjects() and some more stuff. Is there any similar call inside osgViewer::Viewer?, with jogl there is an special Panel that use internally pbuffers to create the context, but when we resize the component the context is lost, so calling releaseGLObjects did the trick for us, but now I don't find a good way to get the same things working. I tried with viewer-getCamera()-releaseGLObjects(); but doesn't work. Maybe adding a releaseAllGLObjects method in View, or in Viewer is a good place. thoughts? Rafa. -- Rafael Gaitán Linares Instituto de Automática e Informática Industrial http://www.ai2.upv.es Ciudad Politécnica de la Innovación Universidad Politécnica de Valencia ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Rafael Gaitán Linares Instituto de Automática e Informática Industrial http://www.ai2.upv.es Ciudad Politécnica de la Innovación Universidad Politécnica de Valencia ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] release and flush GL Objects?
HI Rafa,
On 9/17/07, Rafa Gaitan [EMAIL PROTECTED] wrote:
Node doesn't have a releaseAllGLObjects, and trying with
releaseGLObjects, doesn't work as I expect. Maybe I'm using
a bad approach to the problem! :(.
Sorry,
viewer-releaseGLObjects();
Is the call I was thinking of.
releaseAllGLObjects method is only inside SceneView class
which is not easily accessible in the osgViewer::Viewer.
You get get the SceneView via the Renderer object which is attached
the Camera in 2.1.x.
However, you shouldn't need it.
All SceneView::releaseAllGLobjects() does is:
void SceneView::releaseAllGLObjects()
{
if (!_camera) return;
_camera-releaseGLObjects(_renderInfo.getState());
// we need to reset State as it keeps handles to Program objects.
if (_renderInfo.getState()) _renderInfo.getState()-reset();
}
And all SceneView::flushAllDeletedGLObjects() does is:
void SceneView::flushAllDeletedGLObjects()
{
_requiresFlush = false;
osg::flushAllDeletedGLObjects(getState()-getContextID());
}
So you could try:
viewer.getSceneData()-releaseGLObjects(); // or getCamera()...
viewer.getCamera()-getGraphicsContext()-getState()-reset();
osg::flushAllDeletedGLObjects(0);
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Re: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for useas texture
Thank you everyone for replies to my problem...
Bill's code was instructive by showing that the basic idea behind what
I was trying to do was correct. My old method (and Bill's) would
attempt to perform a deep copy. In this method, I'd simply forgotten
to initialize something before using it. Sorry! My new method performs
a shallow copy and is working now, with very little code required.
I've posted it below.
-- John
osg::Image* Convert_OpenCV_TO_OSG_IMAGE(IplImage* cvImg)
{
if(cvImg-nChannels == 3)
{
// Flip image from top-left to bottom-left origin
if(cvImg-origin == 0) {
cvConvertImage(cvImg , cvImg, CV_CVTIMG_FLIP);
cvImg-origin = 1;
}
// Convert from BGR to RGB color format
//printf(Color format %s\n,cvImg-colorModel);
cvCvtColor( cvImg, cvImg, CV_BGR2RGB );
osg::Image* osgImg = new osg::Image();
osgImg-setImage(
cvImg-width, //s
cvImg-height, //t
3, //r
3, //GLint internalTextureformat, (GL_LINE_STRIP,
0x0003)
6407, // GLenum pixelFormat, (GL_RGB, 0x1907)
5121, // GLenum type, (GL_UNSIGNED_BYTE, 0x1401)
(BYTE*)(cvImg-imageData), // unsigned char* data
osg::Image::AllocationMode::NO_DELETE // AllocationMode
mode (shallow copy)
);//int packing=1); (???)
//printf(Conversion completed\n);
return osgImg;
}
else {
printf(Unrecognized image type);
return 0;
}
}
On 9/17/07, Poirier, Guillaume [EMAIL PROTECTED] wrote:
Hi John,
I wrote a osgImage2IplImage, not sure if it could help you, but here it is:
/*! Image conversion functions
Utility functions to convert between different image representations */
IplImage* osgImage2IplImage(const osg::Image p_osgImage)
{
const unsigned char *buffer = p_osgImage.data();
IplImage* pImg = cvCreateImage(cvSize(p_osgImage.s(), p_osgImage.t()),
IPL_DEPTH_8U, p_osgImage.r() );
if(p_osgImage.r() == 3)
{
struct pixelStruct { unsigned char r, g, b; };
struct pixelStruct* pPixel = ( struct pixelStruct * ) ( buffer );
struct pixelStruct* pCurrentPixel = NULL;
for(int x = 0; x p_osgImage.s(); x++ ) {
for(int y = 0; y p_osgImage.t(); y++ ) {
pCurrentPixel = pPixel[ y * p_osgImage.s() + x ];
int invertedY = p_osgImage.t()-1-y;
// blue
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3] =
pCurrentPixel-b;
// green
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+1] =
pCurrentPixel-g;
// red
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+2] =
pCurrentPixel-r;
}
}
}
else if(p_osgImage.r() == 4)
{
struct pixelStruct { unsigned char r, g, b, a; };
struct pixelStruct* pPixel = ( struct pixelStruct * ) ( buffer );
struct pixelStruct* pCurrentPixel = NULL;
for(int x = 0; x p_osgImage.s(); x++ ) {
for(int y = 0; y p_osgImage.t(); y++ ) {
pCurrentPixel = pPixel[ y * p_osgImage.s() + x ];
int invertedY = p_osgImage.t()-1-y;
// alpha
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3] =
pCurrentPixel-a;
// blue
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+1] =
pCurrentPixel-b;
// green
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+2] =
pCurrentPixel-g;
// red
((uchar*)(pImg-imageData + pImg-widthStep*invertedY))[x*3+3] =
pCurrentPixel-r;
}
}
}
else
{
osg::notify(osg::NOTICE)osgImage2IplImage: Error, unrecognized image
depth.std::endl;
}
return pImg;
}
bill
-Original Message-
From: [EMAIL PROTECTED] on behalf of John Steinbis
Sent: Sun 9/16/2007 9:23 PM
To: OpenSceneGraph Users
Subject: [osg-users] Convertion to osg::Image from IplImage (OpenCV) for
useas texture
Hi,
I'm trying to convert an IplImage (OpenCV) type to osg::Image type for
use as a texture within OSG. My conversion routine attempts to utilize
setImage(...) of image class. It crashes and I havent been able to
track down the problem.
Does anyone have experience with a conversion like this or advise
about building osg images from other types? Thank you!
-- John
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Re: [osg-users] release and flush GL Objects?
On 9/17/07, Rafa Gaitan [EMAIL PROTECTED] wrote: viewer.getSceneData()-releaseGLObjects(); // or getCamera()... viewer.getCamera()-getGraphicsContext()-getState()-reset(); osg::flushAllDeletedGLObjects(0); Yes, This works better, Thank You!, there is some issues with PagedLOD nodes, so I need to debug more and see how to solve them. It might well be the database pager has objects still held into its internal lists but not just merged. Once you get to the bottom of it we could possibly wrap up all that is required in a clean up method in osgViewer::Viewer/CompositeViewer/GraphicsWindowEmbedded. BTW, could you try removing the original GraphicsWindowEmbedded and replace it with new one as this is effectively you are doing - changing the graphics context from underneath the viewer. Robert. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] multipass calculating with shaders
thank Jhon. I want to read the buffer from the texture only for debug purposes. In the final program I won't do it. I need to associate image with the texture to set it's initial values, and later some passes in the multipass sequences are updating this data. The problem is that after associating image with the texture, I think the image reads automatically the texture buffer (take the osgprerender example for instance, there is an image and in the post render they play with it's buffer, which means the image read the current texture), and this might slow down the program. Another thing is as I mentioned earlier: I need to set the initial values of the texture, and the only way I know how to do it is using images, so the question is how do I set images internal type, pixel type and gltype, to be float, long, etc... (unsigned char appears in the examples). btw, I offset the point by half and it worked for one pass that renders about 3 pixels. it didn't work for other pass that renders 1 pixel. is there a problem when the viewport is 1x1? thanks a lot, Guy. - Original Message - From: John Donovan [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Monday, September 17, 2007 4:54 PM Subject: Re: [osg-users] multipass calculating with shaders [EMAIL PROTECTED] wrote: thanks, I'll try that. more problems I'm facing is setting the image internal data type, I've seen in the examples setting the internal type to 3 or 4. what does it mean? how do I set it to float or int? I use the following code for rendering to a floating-point texture: _texture = new Texture2D; _texture-setResizeNonPowerOfTwoHint(false); _texture-setTextureSize(_totalWidth, _totalHeight); _texture-setSourceType(GL_FLOAT); _texture-setSourceFormat(GL_RGB); _texture-setInternalFormat(GL_RGB32F_ARB); _texture-setFilter(Texture2D::MIN_FILTER, Texture2D::NEAREST); _texture-setFilter(Texture2D::MAG_FILTER, Texture2D::NEAREST); and I couldn't read from the image even that I used code very similar to osgprerender example :(, the image-data() return buffer filled with garbage. If I understand it correctly, the Image associated with a Texture is used for uploading the data into the texture. If you want to read from the texture, you'll need to copy it to a buffer. I can't remember how to do that off-hand, but it'll likely be fairly slow. -J __ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email __ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
