Re: [osg-users] 64-bit OSG
I have been using 64 OSG on both linux and windows environment without any issues. For our modeler we had to build 64 bit OSG for Max OSG exporter on his 64 bit machine. As he had plenty of memory on his machine we were able to export large dataset in a single step which was not possible earlier with his 32 bit machine. ~Aashish On Nov 29, 2007 7:05 PM, Donald Tidrow [EMAIL PROTECTED] wrote: Zach Deedler wrote: This site explains it all: http://en.wikipedia.org/wiki/64-bit 2^32 = 4GB 2^64 = 17,179,869,184GB or 16 exabytes (I was wrong before). Actually this depends on whether the CPU you're using can really address this much memory - I seem to recall that AMD cpu's are limited to 48-bit physical addresses. Some operating systems reserve portions of process address space for OS use, effectively reducing the total address space available for mapping memory for user programs. For instance, Windows XP DLLs and userland OS components are mapped into each process's address space, leaving only 2 to 3.8 GB (depending on the settings) address space available, even if the computer has 4 GB of RAM. This restriction is not present in 64-bit Windows. Not sure what linux does. But, you can't get past the 4GB ceiling for a process on a 32-bit OS. Last I checked, Linux allowed 3GB/process of user-addressable memory running a 32-bit kernel. Another advantage that you can get from running in 64-bit mode, at least with x86-64 cpu's, is the use of twice as many processor registers (all 64-bits wide). This can sometimes speed up programs if you use the right optimization flags. Don -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Balfour Sent: Thursday, November 29, 2007 9:54 AM To: OpenSceneGraph Users Subject: Re: [osg-users] 64-bit OSG Gordon Tomlinson wrote: Note on 32 bit even though the system may let you get to 3gb of memory seen Your addressable memory space per process will be limited to around 1.8gb on a 32bit system Why is that? And is that per process, or per thread? Bob. -- A government that is big enough to give you all you want is big enough to take it all away. -- Barry Goldwater ++ | Don Tidrow| | Visualization Software Engineer | | SAIC | | ph: 703-253-1094 | ++ ___ 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] DynamicLibrary::failed loading
I don't know if it matters in this case or not but on WinXP I had a problem with spaces in paths. If I put OSG into a directly with a space in it and then added that directory to my path: I would be able to run osgviewer.exe but it would fail to find any of the DLLs. Moving it to a directory without a space fixed it. At the time, I couldn't find anything to make it work... but I didn't try very hard either (since I had a work-around). It seemed like DLL resolution was done differently than exe path resolution. I could have been out of my mind, too. -Paul Mike Weiblen wrote: Interesting, thanks for the data. This is exactly the kind of situation I had intended my installer would solve, this is good feedback. fyi, the osgDB library explicitly does the loading of the osgdb_*.dll plugins, which is why there aren't problems finding and the plugins are found in their magic directory, etc. At issue is how the dependencies pulled in by the Windows runtime linker are found and loaded. (some backstory: this pathing garbage is all due to the licensing of the MS redist libraries. Other dependency libraries don't limit how they're put in the filesystem, so they can be located whereever's convenient. The MS runtime redist requires their subdirectory structure and naming be preserved. :-P) I'd really like to understand the root cause here, so the installer will Just Work. A couple more questiions: - this isn't Vista, is it? - exactly what's the machine config? (which OS, SP, etc? 32/64 bit? Is/was VS ever installed, which version?) - are you installing as admin or not? - are you running as admin or not? - where is OSG being installed? on a UNC share? The official MS-sanctioned sure-fire solution is to run the redist installer to put the runtime libs in the public shared assembly directory: C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\BootStrapper\Packages\vcredist_x86\vcredist_x86.exe That will require admin permission, but should bypass the whole private assembly pathing issue. If that doesn't work, there're bigger issues afoot. cheers -- mew -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Will Sistar Sent: Thursday, November 29, 2007 4:55 PM To: OpenSceneGraph Users Subject: Re: [osg-users] DynamicLibrary::failed loading Well, here is what I have done so far. I used Depends and found that it couldn't find the two microsoft dir, so I added that to my path as you mentioned. (still didn't work) Uninstalled OSG and then reinstalled making sure to add the environment variables to the registry. (I believe I did before) Ran osgShell without any modifications and found that it does in fact add %OSG_PATH% to the front of the system path with the same directories listed as Mike previously mentioned. Tried osgviewer cow.osg again and it still didn't work. What is interesting is that when I manually load it doesn't prepend the osgPlugins-2.2.0 to the filename and it finds and uses it with no problems. If I type in osgviewer -l osgPlugins-2.2.0/osgdb_osg.dll cow.osg it finds the file but still says it fails to load. If it were a dependency problem wouldn't it have a problem loading the dll regardless of how it found it? I am not saying it isn't a PATH issue but it always seems to find the file, it just fails when it is anywhere other than the \bin dir. I tried putting it in the \system32 directory and try to manually load it and it finds it there but fails to load. It works on one of my home pc just not my work one. Mike, this is where I started with setting up my env variables. I think I may have entered one of them wrong before which is why I removed everything and started over. I then checked them against what you had in your email and they matched. http://www.openscenegraph.org/projects/osg/wiki/Support/Gettin gStartedstep 4. and http://www.openscenegraph.org/projects/osg/wiki/Support/Platfo rmSpecifics/VisualStudio http://www.openscenegraph.org/projects/osg/wiki/Support/Platf ormSpecifics/VisualStudio Environment Variables ___ 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] Fade in fade out effect
Have used glAccum .. thanx Robert it worked :) On Dec 1, 2007 12:30 AM, Robert Osfield [EMAIL PROTECTED] wrote: Hi Deepti, The easiest way to do this would be to use the accumulation buffer - if available, have a look at the osgmotionblurr example for inspiration. If you don't have a accumulation buffer available then using two cameras for the two different views of the scenes, and have the first camera render to texture, then after the second camera/view has drawn draw over the use a full quad blending with the background. Robert. On Nov 30, 2007 5:29 PM, deepti g [EMAIL PROTECTED] wrote: Hi everyone I want to implement a fade in fade out option where one scene fades out and another scene comes into view.. Is there any such option for scene as FADE TEXT for text..Iam dint find a direct functionality to do this.Can anybody suggest me as to how to solve this? Thank You Deepti ___ 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 -- -- Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Mutex and ReentrantMutex
On Nov 30, 2007 10:16 PM, André Garneau [EMAIL PROTECTED] wrote: Hi Paul, 1. I always understood reentrant to refer to code or an object that could be executed safely by multiple threads or processes. However, the ReentrantMutex would only be used for code that is safe for the _same_ thread or process to execute concurrently, thus my confusion. Is the name reentrant appropriate here? I agree with you that re-entrant is a misnomer for this class. Some frameworks use the term recursive mutex (i.e. ACE, Boost) for such functionality, although this is still a debatable term for it. The ReentrantMutex naming convention is inherited from another project from a number of years back, can't remember the details now. 2. A couple years back I simplified the Mutex class for Windows. As a result, it actually works somewhat like the ReentrantMutex. Mea culpa. IMHO, I think it's actually an excellent thing to have it this way. The cost of implementing counted lock acquisition is negligible and the savings in debugging and maintenance time more than outweigh this cost. However this does bring the issue of having possibly different behaviour when porting an application from Windows to other platforms. Its absolute crucial that things behave the same on all platforms, the implementations may vary, but the behaviour needs to be the same as far as possible. If some one want to volunteer a Win32 version then I'm open. Performance wise there isn't any critical points in the OSG that use ReentrantMutex, so I don't see a strong need to trying to optimize it. I have found occasional problems with ReentrantMutext though, but haven't yet pinpointed the cases where it fails clearly enough to know the case/provide a fix. So the code itself could do with improving... Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Is there a BUG in osg::Polytope::setToBoundingBox ?
Hi Wangray, You were correct, there was a bug in Polytope::setBoundingBox, I created a unit test in osgunittests and reproduced the bug you illustrated, then reviewed the relevant code, fixed it and it now passes the test. The fix is now checked into SVN. File also attached. Robert. On Dec 1, 2007 4:16 AM, 锐王 [EMAIL PROTECTED] wrote: Hi all, I'm new here. Please don't mind of my ignorant and rudeness :) While reading the source code of osgUtil, I find that in the implement code of osg::Polytope::setToBoundingBox(...): ... _planeList.push_back(Plane(0.0,0.0,-1.0,bb.zMin())); // near plane _planeList.push_back(Plane(0.0,0.0,1.0,bb.zMax())); // far plane ... That means when Zmin=-1000 and Zmax=1000, The near and far plane of the plane list of Polytope will be the same except their normals. And a bug appeared when I write: ... osg::Polytope pt; pt.setToBoundingBox(osg::BoundingBox(-1000, -1000, -1000, 1000, 1000, 1000)); bool bContain = pt.contains(osg::Vec3(0, 0, 0)); ... bContain will be set to false. Is there a bug in setToBoundingBox, or I just made a silly mistake myself? :P I'm using OSG 2.2 and VS2005. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Polytope Description: Binary data ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Getting world coord bounding box
Hi osg users, I'm currently using openscenegraph for my class project to simulate traffic. I have a problem in that , i need to find collision detection between consecutive cars and stop the car if there is a collision. I have followed the osgExample- for animation. I have used an animationpath and animationpathcallback and i have implemented my own spline interpolation for the car to traverse on a spline. I tried to get the world coordinate of the bounding box like this.. * i have a class Vehicle that stores the node to which an openflight model is read into. * the leaf node is the node having the vehicle, the parent node of this node is a transformation node which has an animationpathcallback set to, and this also has a parent node to initially set the location and orientation, (just like in the osgExample animation). * i have a node visitor that traverses parents..so it goes from the current node to the root concatenating all the world coordinates. * then i get the local bounding box of the node and get the minimum and maximum and multiply the world coord matrix with these points to form a new min and max point and create a new bounding box. I do this for every two node to check the intersection of two consecutive nodes. //getWorldCoords() - forwards to a nodevisitor to get world coords matrix. osg::Matrixd* WorldCoordsMatrix = getWorldCoords(this-m_Vehicle) ; osg::BoundingBox VehicleBBox ; VehicleBBox.expandBy(m_Vehicle-getBound()) ; //Convert the vehicle local coords to world coordinates. osg::Vec3f MinPt(VehicleBBox.xMin() , VehicleBBox.yMin() , VehicleBBox.zMin()) ; osg::Vec3f MaxPt(VehicleBBox.xMax() , VehicleBBox.yMax() , VehicleBBox.zMax()) ; osg::Vec3f NewMinPt , NewMaxPt ; NewMinPt = MinPt * (*WorldCoordsMatrix) ; NewMaxPt = MaxPt * (*WorldCoordsMatrix) ; this-m_VehicleBoundingBox = new osg::BoundingBox(NewMinPt , NewMaxPt) ; I am not getting correct results. I get that the bounding boxes dont intersect at all or sometimes intersect at odd places. Please let me know if i'm doing something stupid or if i my understanding of anything wrong. Thank you, Yours Sincerely, Siddharth Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] FBO resizing problem
Hi Robert, i only resize (i.e. recreate) the FBO when a resize operation is performed (when it is detected as finished). 99% of the time this will not happen. Really, my app performance is dropping due to the readback operation every frame. In my case this is acceptable, as i don't need constant frame rate (i'm rendering on demand, my app is a CAD like one). OSG is so fast doing its work, that the response time is good enough. This is my workaround to the problem i mentioned in my post: osgViewer::Renderer* renderer = (osgViewer::Renderer*)camera-getRenderer(); renderer-getSceneView(0)-getRenderStage()-setCameraRequiresSetUp(true); renderer-getSceneView(0)-getRenderStage()-setFrameBufferObject(NULL); These lines force the RenderStage to recreate the FBO, but this only happens when the resize operation ends. Your idea is better of course. But my app must be able to handle a multimonitor system. How can i determine in this situation what is the largest region i need? Is this region independent of the multimonitor configuration? Thank you for your advices, Robert. I really appreciate them. Himar. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Getting world coord bounding box
hi, don't you have to multiply the matrix from the left side with the vector, like this: M * x = x', whereas M is your 'WorldCoordsMatrix', x is your local BBox vector and x' is the same in world coords. hope this helps. daniel Siddharth Palaniappan wrote: Hi osg users, I'm currently using openscenegraph for my class project to simulate traffic. I have a problem in that , i need to find collision detection between consecutive cars and stop the car if there is a collision. I have followed the osgExample- for animation. I have used an animationpath and animationpathcallback and i have implemented my own spline interpolation for the car to traverse on a spline. I tried to get the world coordinate of the bounding box like this.. * i have a class Vehicle that stores the node to which an openflight model is read into. * the leaf node is the node having the vehicle, the parent node of this node is a transformation node which has an animationpathcallback set to, and this also has a parent node to initially set the location and orientation, (just like in the osgExample animation). * i have a node visitor that traverses parents..so it goes from the current node to the root concatenating all the world coordinates. * then i get the local bounding box of the node and get the minimum and maximum and multiply the world coord matrix with these points to form a new min and max point and create a new bounding box. I do this for every two node to check the intersection of two consecutive nodes. //getWorldCoords() - forwards to a nodevisitor to get world coords matrix. osg::Matrixd* WorldCoordsMatrix = getWorldCoords(this-m_Vehicle) ; osg::BoundingBox VehicleBBox ; VehicleBBox.expandBy(m_Vehicle-getBound()) ; //Convert the vehicle local coords to world coordinates. osg::Vec3f MinPt(VehicleBBox.xMin() , VehicleBBox.yMin() , VehicleBBox.zMin()) ; osg::Vec3f MaxPt(VehicleBBox.xMax() , VehicleBBox.yMax() , VehicleBBox.zMax()) ; osg::Vec3f NewMinPt , NewMaxPt ; NewMinPt = MinPt * (*WorldCoordsMatrix) ; NewMaxPt = MaxPt * (*WorldCoordsMatrix) ; this-m_VehicleBoundingBox = new osg::BoundingBox(NewMinPt , NewMaxPt) ; I am not getting correct results. I get that the bounding boxes dont intersect at all or sometimes intersect at odd places. Please let me know if i'm doing something stupid or if i my understanding of anything wrong. Thank you, Yours Sincerely, Siddharth Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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] Getting world coord bounding box
Hi daniel, I read thru this at the osg site : http://www.openscenegraph.org/projects/osg/wiki/Support/Maths/MatrixTransformations In the end , robert says ways are defined ... i initially multiplied the matrix on the left side. But after reading this i changed it...am i wrong ? Siddharth - Original Message From: Daniel Holz [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Saturday, December 1, 2007 2:35:52 PM Subject: Re: [osg-users] Getting world coord bounding box hi, don't you have to multiply the matrix from the left side with the vector, like this: M * x = x', whereas M is your 'WorldCoordsMatrix', x is your local BBox vector and x' is the same in world coords. hope this helps. daniel Siddharth Palaniappan wrote: Hi osg users, I'm currently using openscenegraph for my class project to simulate traffic. I have a problem in that , i need to find collision detection between consecutive cars and stop the car if there is a collision. I have followed the osgExample- for animation. I have used an animationpath and animationpathcallback and i have implemented my own spline interpolation for the car to traverse on a spline. I tried to get the world coordinate of the bounding box like this.. * i have a class Vehicle that stores the node to which an openflight model is read into. * the leaf node is the node having the vehicle, the parent node of this node is a transformation node which has an animationpathcallback set to, and this also has a parent node to initially set the location and orientation, (just like in the osgExample animation). * i have a node visitor that traverses parents..so it goes from the current node to the root concatenating all the world coordinates. * then i get the local bounding box of the node and get the minimum and maximum and multiply the world coord matrix with these points to form a new min and max point and create a new bounding box. I do this for every two node to check the intersection of two consecutive nodes. //getWorldCoords() - forwards to a nodevisitor to get world coords matrix. osg::Matrixd* WorldCoordsMatrix = getWorldCoords(this-m_Vehicle) ; osg::BoundingBox VehicleBBox ; VehicleBBox.expandBy(m_Vehicle-getBound()) ; //Convert the vehicle local coords to world coordinates. osg::Vec3f MinPt(VehicleBBox.xMin() , VehicleBBox.yMin() , VehicleBBox.zMin()) ; osg::Vec3f MaxPt(VehicleBBox.xMax() , VehicleBBox.yMax() , VehicleBBox.zMax()) ; osg::Vec3f NewMinPt , NewMaxPt ; NewMinPt = MinPt * (*WorldCoordsMatrix) ; NewMaxPt = MaxPt * (*WorldCoordsMatrix) ; this-m_VehicleBoundingBox = new osg::BoundingBox(NewMinPt , NewMaxPt) ; I am not getting correct results. I get that the bounding boxes dont intersect at all or sometimes intersect at odd places. Please let me know if i'm doing something stupid or if i my understanding of anything wrong. Thank you, Yours Sincerely, Siddharth Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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 Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Getting world coord bounding box
Hi Daniel, Sorry for the misunderstanding...yes you're right, it has to be done on the left side. But i still dont get any valid results. Can you suggest how i can test if the world coordinates of the box after multiplication is correct or not? Thank you, Siddharth - Original Message From: Siddharth Palaniappan [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Saturday, December 1, 2007 2:41:19 PM Subject: Re: [osg-users] Getting world coord bounding box Hi daniel, I read thru this at the osg site : http://www.openscenegraph.org/projects/osg/wiki/Support/Maths/MatrixTransformations In the end , robert says ways are defined ... i initially multiplied the matrix on the left side. But after reading this i changed it...am i wrong ? Siddharth - Original Message From: Daniel Holz [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Saturday, December 1, 2007 2:35:52 PM Subject: Re: [osg-users] Getting world coord bounding box hi, don't you have to multiply the matrix from the left side with the vector, like this: M * x = x', whereas M is your 'WorldCoordsMatrix', x is your local BBox vector and x' is the same in world coords. hope this helps. daniel Siddharth Palaniappan wrote: Hi osg users, I'm currently using openscenegraph for my class project to simulate traffic. I have a problem in that , i need to find collision detection between consecutive cars and stop the car if there is a collision. I have followed the osgExample- for animation. I have used an animationpath and animationpathcallback and i have implemented my own spline interpolation for the car to traverse on a spline. I tried to get the world coordinate of the bounding box like this.. * i have a class Vehicle that stores the node to which an openflight model is read into. * the leaf node is the node having the vehicle, the parent node of this node is a transformation node which has an animationpathcallback set to, and this also has a parent node to initially set the location and orientation, (just like in the osgExample animation). * i have a node visitor that traverses parents..so it goes from the current node to the root concatenating all the world coordinates. * then i get the local bounding box of the node and get the minimum and maximum and multiply the world coord matrix with these points to form a new min and max point and create a new bounding box. I do this for every two node to check the intersection of two consecutive nodes. //getWorldCoords() - forwards to a nodevisitor to get world coords matrix. osg::Matrixd* WorldCoordsMatrix = getWorldCoords(this-m_Vehicle) ; osg::BoundingBox VehicleBBox ; VehicleBBox.expandBy(m_Vehicle-getBound()) ; //Convert the vehicle local coords to world coordinates. osg::Vec3f MinPt(VehicleBBox.xMin() , VehicleBBox.yMin() , VehicleBBox.zMin()) ; osg::Vec3f MaxPt(VehicleBBox.xMax() , VehicleBBox.yMax() , VehicleBBox.zMax()) ; osg::Vec3f NewMinPt , NewMaxPt ; NewMinPt = MinPt * (*WorldCoordsMatrix) ; NewMaxPt = MaxPt * (*WorldCoordsMatrix) ; this-m_VehicleBoundingBox = new osg::BoundingBox(NewMinPt , NewMaxPt) ; I am not getting correct results. I get that the bounding boxes dont intersect at all or sometimes intersect at odd places. Please let me know if i'm doing something stupid or if i my understanding of anything wrong. Thank you, Yours Sincerely, Siddharth Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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 Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Be a better pen pal. Text or chat with friends inside Yahoo! Mail. See how. http://overview.mail.yahoo.com/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Getting world coord bounding box
hi siddharth, i just started being confused reading the link you sent me when i got this new email of yours :) if i am in a situation like this what i usually do is i draw what i can't see. in your case it is the bounding box PRIOR to your transformation to world coordinates and the one AFTER transforming. just render to boxes or render spheres in two different colors marking the positions of the corners. i am sure, having something visually, you will be able to figure out the problem. cheers, daniel Siddharth Palaniappan wrote: Hi Daniel, Sorry for the misunderstanding...yes you're right, it has to be done on the left side. But i still dont get any valid results. Can you suggest how i can test if the world coordinates of the box after multiplication is correct or not? Thank you, Siddharth - Original Message From: Siddharth Palaniappan [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Saturday, December 1, 2007 2:41:19 PM Subject: Re: [osg-users] Getting world coord bounding box Hi daniel, I read thru this at the osg site : http://www.openscenegraph.org/projects/osg/wiki/Support/Maths/MatrixTransformations In the end , robert says ways are defined ... i initially multiplied the matrix on the left side. But after reading this i changed it...am i wrong ? Siddharth - Original Message From: Daniel Holz [EMAIL PROTECTED] To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Sent: Saturday, December 1, 2007 2:35:52 PM Subject: Re: [osg-users] Getting world coord bounding box hi, don't you have to multiply the matrix from the left side with the vector, like this: M * x = x', whereas M is your 'WorldCoordsMatrix', x is your local BBox vector and x' is the same in world coords. hope this helps. daniel Siddharth Palaniappan wrote: Hi osg users, I'm currently using openscenegraph for my class project to simulate traffic. I have a problem in that , i need to find collision detection between consecutive cars and stop the car if there is a collision. I have followed the osgExample- for animation. I have used an animationpath and animationpathcallback and i have implemented my own spline interpolation for the car to traverse on a spline. I tried to get the world coordinate of the bounding box like this.. * i have a class Vehicle that stores the node to which an openflight model is read into. * the leaf node is the node having the vehicle, the parent node of this node is a transformation node which has an animationpathcallback set to, and this also has a parent node to initially set the location and orientation, (just like in the osgExample animation). * i have a node visitor that traverses parents..so it goes from the current node to the root concatenating all the world coordinates. * then i get the local bounding box of the node and get the minimum and maximum and multiply the world coord matrix with these points to form a new min and max point and create a new bounding box. I do this for every two node to check the intersection of two consecutive nodes. //getWorldCoords() - forwards to a nodevisitor to get world coords matrix. osg::Matrixd* WorldCoordsMatrix = getWorldCoords(this-m_Vehicle) ; osg::BoundingBox VehicleBBox ; VehicleBBox.expandBy(m_Vehicle-getBound()) ; //Convert the vehicle local coords to world coordinates. osg::Vec3f MinPt(VehicleBBox.xMin() , VehicleBBox.yMin() , VehicleBBox.zMin()) ; osg::Vec3f MaxPt(VehicleBBox.xMax() , VehicleBBox.yMax() , VehicleBBox.zMax()) ; osg::Vec3f NewMinPt , NewMaxPt ; NewMinPt = MinPt * (*WorldCoordsMatrix) ; NewMaxPt = MaxPt * (*WorldCoordsMatrix) ; this-m_VehicleBoundingBox = new osg::BoundingBox(NewMinPt , NewMaxPt) ; I am not getting correct results. I get that the bounding boxes dont intersect at all or sometimes intersect at odd places. Please let me know if i'm doing something stupid or if i my understanding of anything wrong. Thank you, Yours Sincerely, Siddharth Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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 Never miss a thing. Make Yahoo your home page.
Re: [osg-users] OsgViewer in form, aspect ratio issue and error on close
Hi,
i'm also using .NET (with C++/CLI) and i'm also new with OSG (a few moths
like you). Perhaps that can help you:
1) the projectionMatrix is recomputed in
GraphicsContext::resizedImplementation (which GraphicsWindow derives from).
You can override it (setResizedCallback), or look at how it is done.The code
use the traits structure to calculate the aspect ratio. Be sure you are
initializing the traits correctly.
Another way is setting the viewer with setUpViewerAsEmbeddedInWindow. There
are messages in the lists archives explaining it. I remember at least one. I
recommend you to look at the examples of osgViewerXXX. (osgviewerGLUT,
osgViewerQT, ...) osgviewerMFC is perhaps not the best one.
setUpViewerAsEmbeddedInWindow looks like the best method to separate the
viewer from the GUI framework.
2) It seems that the window Handle is being released before you close the
GraphicsContext. On .NET, Form::OnClosed, is called AFTER the window has
been destroyed, so it seems a 'tempo' error. Try OnClosing instead. This is
called before the window handle is released.Beware which one you use. If
this is not the problem, try setting the threadingModel of the viewer to
SingleThreaded and see if it is some threading issue.
Hope this helps.
Himar.
2007/11/30, Miao [EMAIL PROTECTED]:
hi Christophe,
1) it seems that the aspect ratio used for the rendering is based on the
ratio of the form size.
About your first problem,when i reuse code of osgviewerMFC ,
I met the same problem.
I found in osgViewer::Viewer's base class osg::view 's constructor ,
it'll new a master camera and set ProjectionMatrix with screen ratio.
and when you add camera with addSlave() , it will call the updateSlave(),
and set ProjectionMatrix using master camera' projection.
so my solution is set projection matrix to own camera,
and using setCamera() to set master camera instead of using addSlave().
i am not sure it is a good solution or not, but i works.
by the way, i use osg 2.2 .
Hope it also works with osg2.0.
some code from osg::View
View::View(): Object(true)
{
..
_camera = new osg::Camera;
_camera-setView(this);
double height = osg::DisplaySettings::instance()-getScreenHeight();
double width = osg::DisplaySettings::instance()-getScreenWidth();
double distance = osg::DisplaySettings::instance()-getScreenDistance();
double vfov = osg::RadiansToDegrees(atan2(height/2.0f,distance)*2.0);
_camera-setProjectionMatrixAsPerspective( vfov, width/height,
1.0f,1.0f);
_camera-setClearColor(osg::Vec4f(0.2f, 0.2f, 0.4f, 1.0f));
}
void View::updateSlave(unsigned int i)
{
if (i = _slaves.size() || !_camera) return;
Slave slave = _slaves[i];
if (slave._camera-getReferenceFrame()==osg::Transform::RELATIVE_RF)
{
slave._camera-setProjectionMatrix(_camera-getProjectionMatrix() *
slave._projectionOffset);
slave._camera-setViewMatrix(_camera-getViewMatrix() *
slave._viewOffset);
}
slave._camera-inheritCullSettings(*_camera);
if (slave._camera-getInheritanceMask()
osg::CullSettings::CLEAR_COLOR)
slave._camera-setClearColor(_camera-getClearColor());
}
Miao
- Original Message -
From: LOREK Christophe [EMAIL PROTECTED]
To: osg-users@lists.openscenegraph.org
Sent: Friday, November 30, 2007 12:10 AM
Subject: [osg-users] OsgViewer in form, aspect ratio issue and error on
close
hi everyone,
I'm new to this mailing list, although I have been using OpenSceneGraph
for a couple of monthes.
I'm using the OsgViewer from OSG 2.0 and I would like to have it use a
.NET form for display (using managed C++, not C#). I followed the
advice given by Glenn Waldron in his reply to Romain Blanchais on the
20th of November, where he gave the following sample code :
HWND hwnd = (HWND)control-Handle.ToPointer();
osg::ref_ptrosg::GraphicsContext::Traits traits =
new osg::GraphicsContext::Traits();
traits-inheritedWindowData = new
osgViewer::GraphicsWindowWin32::WindowData( hwnd );
traits-setInheritedWindowPixelFormat = true;
traits-doubleBuffer = true;
traits-windowDecoration = false;
traits-sharedContext = 0;
traits-supportsResize = true;
RECT rect;
GetWindowRect( hwnd, rect );
traits-x = 0;
traits-y = 0;
traits-width = rect.right - rect.left;
traits-height = rect.bottom - rect.top;
osg::ref_ptrosg::GraphicsContext gc =
osg::GraphicsContext::createGraphicsContext(
traits.get() );
viewer = new osgViewer::Viewer();
osg::ref_ptrosg::Camera cam = new osg::Camera();
cam-setGraphicsContext( gc.get() );
cam-setViewport( new osg::Viewport( traits-x, traits-y,
traits-width, traits-height ) );
viewer-addSlave( cam.get() );
I have succeeded in obtaining a rendering of the OsgViewer in my form,
but I have the following issues :
1) it seems that the aspect ratio used for the rendering is based on the
ratio of the form size.
This is troublesome as I would
[osg-users] a bug in void osg::Polytope::setToBoundingBox ( const BoundingBox bb ) [inline]
osg-users，您好！
does something wrong in the following code?
void setToBoundingBox(const BoundingBox bb)
{
_planeList.clear();
_planeList.push_back(Plane(1.0,0.0,0.0,-bb.xMin())); // left plane.
_planeList.push_back(Plane(-1.0,0.0,0.0,bb.xMax())); // right plane.
_planeList.push_back(Plane(0.0,1.0,0.0,-bb.yMin())); // bottom
plane.
_planeList.push_back(Plane(0.0,-1.0,0.0,bb.yMax())); // top plane.
_planeList.push_back(Plane(0.0,0.0,-1.0,bb.zMin())); // near plane
_planeList.push_back(Plane(0.0,0.0,1.0,bb.zMax())); // far plane
setupMask();
}
when I want to create a boundingbox with the two point V_min(20,20,20),
V_max(100,100,100) correctly, I must use like that
osg::Polytope pt;
pt.setToBoundingBox(osg::BoundingBox(20,20,100,100,100,-20));
May be the code shuoud change to:
void setToBoundingBox(const BoundingBox bb)
{
_planeList.clear();
_planeList.push_back(Plane(1.0,0.0,0.0,-bb.xMin())); // left plane.
_planeList.push_back(Plane(-1.0,0.0,0.0,bb.xMax())); // right plane.
_planeList.push_back(Plane(0.0,1.0,0.0,-bb.yMin())); // bottom
plane.
_planeList.push_back(Plane(0.0,-1.0,0.0,bb.yMax())); // top plane.
_planeList.push_back(Plane(0.0,0.0,1.0,-bb.zMin())); // near plane
_planeList.push_back(Plane(0.0,0.0,-1.0,bb.zMax())); // far plane
setupMask();
}
ps: this bug is pointed by array(who translated the
OpenSceneGraph_Quick_Start_Guide to Chinese).
致
礼！
祝清鲁
[EMAIL PROTECTED]
2007-12-02
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[osg-users] License issue with .net loader?
Is there a potential license issue with the .net osg plugin? In the ReaderWriterNET plugin source directory, the sockstream.cpp component file has a header comment referencing the GPL license, which is much more limiting that the OSG LGPL(+relaxed for static linking) type license? Bob. -- Robert E. Balfour, Ph.D. Exec. V.P. CTO, BALFOUR Technologies LLC 960 South Broadway, Suite 108, Hicksville NY 11801 Phone: (516)513-0030 Fax: (516)513-0027 email: [EMAIL PROTECTED] ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
