Re: [osg-users] Render normal vectors to image
Hi, Thank you, Glenn! This is what I need! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=76905#76905 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Render normal vectors to image
Hi, Thank you, Glenn. Another less related question. My model is pagedlod in osgb format, which does not contain normal vectors. How can add callback functions, to dynamically calculate the normal vectors and attach it to the normal buffer, when loading? Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=76900#76900 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Render normal vectors to image
Hi, Thanks! I can use osgUtil to compute the normal vectors on the fly. My question is how to render the per-vertex or per-triangles to the image, e.g. the color is the (x,y,z) of the normal vector, rather than the color of texture. Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=76895#76895 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Render normal vectors to image
Hi, I would like to do offscreen rendering of a mesh. Currently, I have suceeded to do this for both the color (RGB) and depth data using the built-in functions as below. Code: osg::ref_ptr rttImage = new osg::Image; osg::ref_ptr depthImage = new osg::Image; camera->attach(osg::Camera::COLOR_BUFFER, rttImage.get()); camera->attach(osg::Camera::DEPTH_BUFFER, depthImage.get()); rttImage->allocateImage(ATInfo.width, ATInfo.height, 1, GL_RGB, GL_UNSIGNED_BYTE); depthImage->allocateImage(ATInfo.width, ATInfo.height, 1, GL_DEPTH_COMPONENT, GL_FLOAT); But I also need to render the normal vectors to images too. I have googled this topic using native opengl, it seems that I have to write shaders for it. But my mesh are defined using the osgb plugin format, so I must implement in the osg. I would like to know, is there an approach to do this in osg? Thanks! Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=76892#76892 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Render normal vectors to image
Hi, I would like to do offscreen rendering of a mesh. Currently, I have suceeded to do this for both the color (RGB) and depth data using the built-in functions as below. Code: osg::ref_ptr rttImage = new osg::Image; osg::ref_ptr depthImage = new osg::Image; camera->attach(osg::Camera::COLOR_BUFFER, rttImage.get()); camera->attach(osg::Camera::DEPTH_BUFFER, depthImage.get()); rttImage->allocateImage(ATInfo.width, ATInfo.height, 1, GL_RGB, GL_UNSIGNED_BYTE); depthImage->allocateImage(ATInfo.width, ATInfo.height, 1, GL_DEPTH_COMPONENT, GL_FLOAT); But I also need to render the normal vectors to images too. I have googled this topic using native opengl, it seems that I have to write shaders for it. But my mesh are defined using the osgb plugin format, so I must implement in the osg. I would like to know, is there an approach to do this in osg? Thanks! Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=76893#76893 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Large scale point clouds rendering with PagedLOD
Hi, I am now doing point clouds rendering (probably city-scale) using osg. The point clouds are indexed using entwine (https://entwine.io/) to the ept format. Basically, we know the bounding box of the entire scene, and the point clouds are saved to disk with the name D-x-y-z.laz, where D is the level of the octree and x,y,z are the coordinates in the octree. Each child level, in the octree, is strictly subdivided by 2. In addition, the levels are drawn additively. For example, 0-0-0-0.laz is the root, when I want to also show it's sub level 1-0-0-0 1-1-0-0 1-1-1-0 1-0-1-0, the four childs and 0-0-0-0 are both draw. So I have two questions, (1) I want to convert the EPT format, to the pagedlod format and saved as osgb file, is it possible for pagedlod that both parent and it's child are both drawn? (2) The laz file also contains other attributes, such as lables (interger), return number (interger), I also want to implement shaders to render color by different attribute, is it possible to save these attribute in osgb and correctly bind the vertext buffer to the same program location? Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75697#75697 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Backward compatibility of osgb file through Schema
Thanks anyway, this is in fact what I felt after looking into the code in the OutputStream code, because it seems that it changes some way to write data and add some new fields without version guard. I think the only way is to write my own write callback and set to the options parameter. Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72289#72289 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Backward compatibility of osgb file through Schema
Hi Robert, My problem is that my osg version is osg 3.5.5, which I convert an obj file to osgb just by readRefNodeFile and writeNodeFile. But I am targeting to other software, which may use some lower version of osg. I have tried osgconv in OSG 3.4.0 and the other software accept. So there seems to be some breaking compatibility change in the osgb format caused by either the osgdb_osg plugin or osgdb::OutputStream class. Thank you! Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72287#72287 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Backward compatibility of osgb file through Schema
Hi, I am using a newer osg version to develop my software and I need to export the model in osgb file for other software, in an acient osg version. I have googled that it is possible to control the compatibility through the SchemaFile. However, I have found little information on how to use it. Is there an example or so on how to do this compatibility in osgb file? Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72285#72285 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does osgb file has compatible issues with older osg versions?
Hi robbert, Thank you for your reply. I read the codes about osgDB::OutputStream and set/getFileVersion() method. Howere, the variable _domainVersionMap seems to record custom domains. My problem is not to serialize custom classes but to save data in old osgb format. I'm not sure if the method will solve the problem. Could you give me more tips? Thank you wery much! robertosfield wrote: > Hi Han, > > I'm not the original author of the serialzer so haven't tested it > personally, but the osgDB::OutputStream class has a setFileVersion() > method may allow you to specify the SO version which to limit the > export to. You'll need to use this class directly rather than rely > upon the osg plugin to create and use this for you. > > Robert. > > On 6 June 2017 at 13:01, Han Hu <> wrote: > > > Hi, > > > > I have developed an triangle mesh editing software, the data edited are a > > pagedlod data in osgb format. And I have used the latest development > > release to save the output in osgb. The accompanying osgViewer is capable > > to open my exported data. > > > > However, my target software to use my data is a commercial software, called > > skyline, it uses an older version of osg, the osg80 seen from the dll name. > > And it fails to open the exported data. > > > > So my question is, if there is any issues with the osgb format that breaks > > the compatibility? If so, is there any options to export an compatible osgb > > format? > > > > P.S. the input before my editing is both good to be open in my software and > > skyline. > > > > Thank you! > > > > Cheers, > > Han > > > > -- > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=71018#71018 > > > > > > > > > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- > Post generated by Mail2Forum -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71021#71021 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Does osgb file has compatible issues with older osg versions?
Hi, I have developed an triangle mesh editing software, the data edited are a pagedlod data in osgb format. And I have used the latest development release to save the output in osgb. The accompanying osgViewer is capable to open my exported data. However, my target software to use my data is a commercial software, called skyline, it uses an older version of osg, the osg80 seen from the dll name. And it fails to open the exported data. So my question is, if there is any issues with the osgb format that breaks the compatibility? If so, is there any options to export an compatible osgb format? P.S. the input before my editing is both good to be open in my software and skyline. Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=71018#71018 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to use frame buffer object in existing (not osg) window and pipeline.
Hi Robert, Thanks for your suggestion, I understand the bettter way is to use osg in all the pipeline. But the ugly fact is that I have to use existing pipeline and inject the view.frame() inside a fbo binding, and hope osg will draw the things onto the fbo texture and depth. Because I can't make others change to osg. And the reasons I have to inject osg into existing pipeline is that I have to load an pagelod data into the scene (some osgb data). And I have successfully do this in the viewerglut example. Otherwise I have to reinventing the big wheel . Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=70275#70275 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] How to use frame buffer object in existing (not osg) window and pipeline.
Hi,
I know OSG viewer can render into other window as shown in the glutviewer and
sdl viewer example. But I do not know how to use fbo for this kind of work. The
following code describes my purpose.
Code:
osg::ref_ptr viewer;
/* The vierwer is properly set up for other window*/
FrameBufferObject fbo;
/* The fbo is properly initilize with color and depth texture attachment and
bind to a FBO object. And the fbo class have access to the texture object and
will be used for image based rendering technic*/
/* The rendering loop */
void draw()
{
// only repaint the whole scene when needed, because my scene is rather
static and heavy,
// draw fewer things
if(dragging){
fbo.bind();
/* draw a fewer things into fbo*/
viewer.frame();
fbo.unbind();
}
/* Draw heavier things */
if(need_repaint)
{
fbo.bind();
viewer.frame();
fbo.unbind();
}
/* Do some post processing with fbo, e.g. eye dome lighting, which is
a image based rendering techniqe */
{
/* filtering */
filter(fbo);
}
/* blit the fbo onto backbuffer */
fbo.blit();
swapbuffer();
}
So my question is how to do this kind of fbo processing in OSG, because after
investigate osg framebufferobject, I find the logic is not like this and a
little confuse to understand.
Thank you!
Cheers,
Han
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Re: [osg-users] writeNodeFile with texture infomation
I have figured out a solution. The steps are as the following, the core file
for the solution lies in OutputStream::writeImage function.
1. To write a image (e.g., *.jpg) inside a file, we need the WRITE_INLINE_FILE
mode, which is set by
Code:
osgDB::Options options;
options.setOptionString("WriteImageHint=IncludeFile");
osgDB::writeNodeFile(*node, "out.osgb", );
2. The image has to be first write to disk and a proper search path is needed.
A node visitor will do the image write correctly and the search path is set by
Code:
osgDB::setDataFilePathList(lists);
Cheers,
Han
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[osg-users] writeNodeFile with texture infomation
Hi, I am currently doing some preprocessing with textured meshes and save the output node to another file. The input node is osgb and has texture information embedded. However after SmoothVisitor and using the writeNodeFile to another osgb file, the texture file is missing. The same problem also exist using osgconv --smooth -O "WriteImageHint=IncludeFile" input output. But it can correctly create texture image using -O "WriteImageHint=WriteOut". I would like to ask that how can I also embed texture file inside the osgb node file? Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68646#68646 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] PagedLOD in hooked context
Hi, Here is my problem. I am developing a plugin for a software, which the rendering is based on OpenGL. Because it does not have any API for custom rendering support, I hooked the SwapBuffer API of windows to my function (say h_SwapBuffer), that I know is called in every frame. And in h_SwapBuffer I can call the viewer.frame() to draw my things. And the viewer can be initilized using the EmbedGraphicsWindow using viewer->setUpViewerAsEmbeddedInWindow And everything went well with traditional node. But when I tried with the PagedLOD files, the node won't show correctly. I have debugged this, and find that the _databaseThreads in DatabasePager have started successfully and the _fileRequestQueue can also be successfully added. Another thing is that, when I zoomed out, the most coarse node can show. When zooming in a little, this node will disappear, but finer nodes can not be shown, even if I have see they are added to the _fileRequestQueue. Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68388#68388 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] hook osg into other window
Hi Sebastian , Sketchup doesn't have any API to allow render into its openGL context. And thanks for your snippet on handling the HWND. But I think the real problem lies in that I do not have access to the render loop. So there is nowhere for me to place the viewer->frame() to render the stuffs. At last thanks again. Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68233#68233 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] hook osg into other window
Hi, Here is my problem. I am writing a plugin for a 3D modeling software , sketchup, and going to draw some 3D things into the OpenGL context. But it does not have any Api for customizing the rendering. So I have to hook my rendering stuffs into its render loop, which I do not have access. I can get the Windows handle HWND of the top window, maybe from that I can track to which window is doing rendering and the OpenGL context. So here is my question, 1. If I get the HWND of the rendering window, can I draw additional things into it? Even if I do not have the access to the render loop, and start my own loop. 2. Another strategy, create another window and OpenGL context, that is overlaid on to existing window, but the overlay is transparent and do not interact with user.The new context only retrieves matrix from the existing one. Thank you! Cheers, Han -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68226#68226 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
