Re: [osg-users] Getting world coord bounding box
Hi Daniel,
I tried out a seperate code example and it did work. But i couldnt get
it working for my project. Like i previously mentioned i needed to get
the world coordinates of the boundingboxes of the loaded openflight
models and if the bounding boxes intersected , i wanted to stop the
vehicle on the animation path. The world coordinates matrix that i receive
each time, seems to be correct as i checked the position of the
ControlPointMap by using the write() in the AnimationPath class. I am now
trying
to manually get the worldcoordinates and keep altering a geode and
attach it to the root node to see if the transformation made to the local
coordinates do infact match.
Is there any code snippet around that tells how to get the world
coordinates for a model on an AnimationPath? To get the world coordinates
this is what i did -
class getWorldCoordOfNodeVisitor : public osg::NodeVisitor
{
public:
getWorldCoordOfNodeVisitor():
osg::NodeVisitor(NodeVisitor::TRAVERSE_PARENTS), done(false)
{
wcMatrix= new osg::Matrixd() ;
}
virtual void apply(osg::Node node)
{
if (!done)
{
if ( 0 == node.getNumParents() ) // no parents
{
wcMatrix-set(
osg::computeLocalToWorld(this-getNodePath()) ) ;
done = true ;
}
traverse(node) ;
}
}
osg::Matrixd* giveUpDaMat()
{
return wcMatrix ;
}
private:
bool done ;
osg::Matrix* wcMatrix ;
} ;
osg::Matrixd* getWorldCoords( osg::Node* node)
{
getWorldCoordOfNodeVisitor* ncv = new getWorldCoordOfNodeVisitor() ;
if (node ncv)
{
node-accept(*ncv) ;
return ncv-giveUpDaMat() ;
}
else
{
return NULL ;
}
}
I have two MatrixTransform node above my vehicle model node. And i use
this to get the World Coord transfomation matrix. The first/topmost
transformation node is a static node to set the initial position and its
child node is another transformation matrix which has an
AnimationPathCallback set to(which moves the vehicle on a spline).
I also see that the animationpathcallback has an update function. Now , does
the animationpathcallback automatically update my TransformMatrix to which i
have set this as a callback?
Do you think the workflow is correct? Am i missing anything? ANy
suggestions?
Thanks for your help...
Siddharth
- Original Message
From: Siddharth Palaniappan [EMAIL PROTECTED]
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Sent: Saturday, December 1, 2007 2:56:27 PM
Subject: Re: [osg-users] Getting world coord bounding box
Hi daniel,
Yes thats a good idea..I will definitely try that and let you know how
it works out. Thank you.
Siddharth
- Original Message
From: Daniel Holz [EMAIL PROTECTED]
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Sent: Saturday, December 1, 2007 2:50:11 PM
Subject: 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
Re: [osg-users] FBO resizing problem
Hi Himar, If you are just resizing occassionally and its you don't have a frame rate critical app then the overhead of recreating an FBO shouldn't be a great issue. Ease of use wise tweaking the internals of RenderStage to recreate the FBO when the setup changes would be the right thing to do long term, I'm too busy right now to go chasing such features, but you are welcome. Otherwise stick to your workaround, or just aim for a large enough FBO enough for the maximum window sizes you expect to encounter. FBO's can go up to 4k by 4k with is far in excess of what window will ever be so you have plenty of head room. Robert. On Dec 1, 2007 7:10 PM, Himar Carmona [EMAIL PROTECTED] wrote: 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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] a bug in void osg::Polytope::setToBoundingBox ( const BoundingBox bb ) [inline]
Hi,
Yesterday another engineer reported this issue, a fix was posted by
myself and also checked into OSG subversion repository. FYI, the
setFrustum method was also buggy in the same way.
Robert.
On Dec 2, 2007 1:28 AM, 祝清鲁 [EMAIL PROTECTED] wrote:
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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Re: [osg-users] Win32 crash
Hi Panagiotis, The crash could be one of many things, its not possible to pinpoint it given the details so far. Things to try at your end would be to force single threaded usage via viewer.setThreadingModel(osgViewer::ViewerBase::SingleThreaded) or setting the env var OSG_THREADING to SingleThreaded. Also try different machines/graphics hardware. Robert. On Dec 2, 2007 3:40 PM, Panagiotis Papadakos [EMAIL PROTECTED] wrote: Hello. There is a crash in my app in windows which I can't reproduce in Linux. I got the attached stacktrace from VS. It seems something is going wrong in osgViewer::Viewer::run(). This is reproducilble with either 2.2 or current SVN. Regards Panagiotis Papadakos ___ 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] License issue with .net loader?
HI Robert, On Dec 1, 2007 11:08 PM, Robert Balfour [EMAIL PROTECTED] wrote: Is there a potential license issue with the .net osg plugin? Potentially yes there could be issues for some usages, the OSG itself is perfectly OK, but use of the plugin will have to be careful to comply, more details below. I must admit I was unaware of this plugin containing GPL'd work. Don Burns wrote the OSG's .net plugin and checked it in, I assumed that it was under the OSGPL as Don was the principle author. FYI, the Xine plugin is also GPL'd as it uses Xine-lib which itself is GPL'd. 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? From my understanding it should be OK for a non GPL'd application to loaded a GPL'd plugin without infringing the license, as the GPL explictly says it covers just copying/distribution, not running of the code. If this wasn't possible then you wouldn't be able to run a GPL'd application under Windows, the relationship between the various elements of code is exactly the same. So if you distribute your app that use a GPL'd plugin you must ensure that your distribution of the plugin is done according to its license. For an end user to be able to excercise their rights granted by the GPL they will need to be able to get the source, and the dependencies and tweak the plugin and rerun you app, this is possible whilst your distribute the OSG as dynamic libs, but not if you statically link it. Static linking of the .net plugin is also breaks the license. However, both these conditions are not difficult to meet. As for the plugin itself it would be nice to rewrite the GPL'd parts to make the plugin an OSGPL'd plugin just to clear up any ambiguity, any volunteers? Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Win32 crash
Hello Panagiotis, sometime ago i had a similar issue. nvoglnt.dll is the nvidia Driver. In my case it was a driver problem. NVIDIA have a known uninstall issue that didn't clean up correctly if you upgrade the driver version (even if you uninstall previous version and install the new one). I've found a page that explain how to cleanly uninstall the nvidia driver (in fact, deleting some of the dlls it installs manually). I do it, and the exceptions gone. Perhaps doing the same may help you. Uninstall, verify that there isn't something that looks like a nvidia driver (seach nvogl.dll and likely ones), and reinstall the drivers. Hope this helps. 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,
i can't tell you much about AnimationPath objects since i never used
them but a short glimpse on the api reference tells me that you can
easily get a transformation matrix for any point in time of the running
animation by using the method osg::AnimationPath::getMatrix(...).
(cf.
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a01017.html)
another way is using a ControlPoint in your TimeControlPointMap:
osg::AnimationPath::ControlPoint::getMatrix(...)
(cf.
http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a01018.html)
anyway, since you control the hierarchy of the scenegraph you don't need
a nodevisitor to find the transform of the vehicle in world cords. you
KNOW how the transformations are done:
your scenegraph probably looks like this:
'rootNode'
|
osg::MatrixTransform 'vehicleAnimationX' (with
vehicleNode-setUpdateCallback(new osg::AnimationPathCallback(...))
|
'vehicleX'
...whereas X refers to one of your vehicles in the scene, meaning that
you have ONE osg::MatrixTransform node for each vehicle.
then for every time step you obtain your world transform matrix for
vehicle X by multiplying all the matrices of the scenegraph nodes
bottom-up and right-to-left like this:
transform of 'rootNode' * transform of 'vehicleAnimationX' * transform
of 'vehicleX'
probably the rootNode transformation is the identity and the vehicle has
no transform node at all so that the transformation in world coords is
simply the transformation of 'vehicleAnimation'!
i hope this helps.
if not, try looking at this example:
http://osgcvs.no-ip.com/osgarchiver/archives/February2005/0270.html
cheers,
daniel
Siddharth Palaniappan wrote:
Hi Daniel,
I tried out a seperate code example and it did work. But i couldnt get
it working for my project. Like i previously mentioned i needed to get
the world coordinates of the boundingboxes of the loaded openflight
models and if the bounding boxes intersected , i wanted to stop the
vehicle on the animation path. The world coordinates matrix that i receive
each time, seems to be correct as i checked the position of the
ControlPointMap by using the write() in the AnimationPath class. I am now
trying
to manually get the worldcoordinates and keep altering a geode and
attach it to the root node to see if the transformation made to the local
coordinates do infact match.
Is there any code snippet around that tells how to get the world
coordinates for a model on an AnimationPath? To get the world coordinates
this is what i did -
class getWorldCoordOfNodeVisitor : public osg::NodeVisitor
{
public:
getWorldCoordOfNodeVisitor():
osg::NodeVisitor(NodeVisitor::TRAVERSE_PARENTS), done(false)
{
wcMatrix= new osg::Matrixd() ;
}
virtual void apply(osg::Node node)
{
if (!done)
{
if ( 0 == node.getNumParents() ) // no parents
{
wcMatrix-set(
osg::computeLocalToWorld(this-getNodePath()) ) ;
done = true ;
}
traverse(node) ;
}
}
osg::Matrixd* giveUpDaMat()
{
return wcMatrix ;
}
private:
bool done ;
osg::Matrix* wcMatrix ;
} ;
osg::Matrixd* getWorldCoords( osg::Node* node)
{
getWorldCoordOfNodeVisitor* ncv = new getWorldCoordOfNodeVisitor() ;
if (node ncv)
{
node-accept(*ncv) ;
return ncv-giveUpDaMat() ;
}
else
{
return NULL ;
}
}
I have two MatrixTransform node above my vehicle model node. And i use
this to get the World Coord transfomation matrix. The first/topmost
transformation node is a static node to set the initial position and its
child node is another transformation matrix which has an
AnimationPathCallback set to(which moves the vehicle on a spline).
I also see that the animationpathcallback has an update function. Now , does
the animationpathcallback automatically update my TransformMatrix to which i
have set this as a callback?
Do you think the workflow is correct? Am i missing anything? ANy
suggestions?
Thanks for your help...
Siddharth
- Original Message
From: Siddharth Palaniappan [EMAIL PROTECTED]
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Sent: Saturday, December 1, 2007 2:56:27 PM
Subject: Re: [osg-users] Getting world coord bounding box
Hi daniel,
Yes thats a good idea..I will definitely try that and let you know how
it works out. Thank you.
Siddharth
- Original Message
From: Daniel Holz [EMAIL PROTECTED]
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Sent: Saturday, December 1, 2007 2:50:11 PM
Subject: 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
Re: [osg-users] Creating shapes using Geometry
Hey, Jean-Sébastien. Now I'm asking for that example code you've offered me, if that still stands... I haven't tried hard enough, to be honest, but I sure have no extra time to deal with this properly right now. Not to mention the guy I work with, which is breathing down my neck... I would appreciate that favor very much. Thanks. Renan M Z Mendes ___ 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, thanks again. For now i will stand with my workaround. I'm also running for a deadline and really i have no time for things other than my project (i think there must be some sort of pandemic disease upon the programmers beings, i will not believe the day one programmer comes and says 'i have a lot of time to spend on this project...') Well, comments apart, is there any place where i could document the proposed changes to FBO functionality in RenderStage and stand there until i (or anyone else) have time to try to incorporate it to the osg distribution? Something like osg-submissions, maybe? Best regards, Himar. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Creating shapes using Geometry
hi renan, i think he meant that you should look at the examples included in the osg package. quote: [..]and the examples that come with the OSG are a treasure trove of code and information. cheers, daniel Renan Mendes wrote: Hey, Jean-Sébastien. Now I'm asking for that example code you've offered me, if that still stands... I haven't tried hard enough, to be honest, but I sure have no extra time to deal with this properly right now. Not to mention the guy I work with, which is breathing down my neck... I would appreciate that favor very much. Thanks. 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] Render To Texture problem in a Reflection algorithm
Hi, In an algorithm of reflection I used Render To Texture, part of the code is: Texture2D* reflectionTex=new Texture2D;//rtt texture reflectionTex-setTextureSize(512, 512); reflectionTex-setInternalFormat(GL_RGBA); reflectionTex-setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR); reflectionTex-setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR); reflectionTex-setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_EDGE); reflectionTex-setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_EDGE); CameraNode * rttcamera=new CameraNode;//rttcam rttcamera-setCullingMode(CullSettings::NO_CULLING); rttcamera-setCullingActive(false); rttcamera-setClearMask(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); // rttcamera-setViewport(0,0,512,512); rttcamera-setRenderOrder(CameraNode::PRE_RENDER); rttcamera-setRenderTargetImplementation(CameraNode::FRAME_BUFFER_OBJECT,CameraNode::PIXEL_BUFFER_RTT); rttcamera-attach(osg::CameraNode::COLOR_BUFFER,reflectionTex); osg::ClipNode* clipNode = new osg::ClipNode; osg::ClipPlane* clipplane = new osg::ClipPlane; Plane pl(normal,point); clipplane-setClipPlane(pl); clipplane-setClipPlaneNum(0); clipNode-addClipPlane(clipplane); clipNode-addChild(reflectTransform); rttcamera-addChild(clipNode); I don't know why it running well on a GeForce 8800 GTS/PCI/SSE2 from NVIDIA Corporation but doesn't have any reflection effect on a GeForce4 MX 440/AGP/SSE2 from NVIDIA Corporation, and while I add a line:rttcamera-setViewport(0,0,512,512),the later machine(GeForce4 MX 440/AGP/SSE2 from NVIDIA Corporation) can have reflect effect,but a strange phenomena appears: an arbitrary window(relative or irrelative with the program) over it will destroy the reflction map and the area destroyed will move with the window over it (once the window over it moves ,the destroyed area move too) , I don't know what have happend and I eagerly to know how to solve the problem. Thanks very much! zhangguilian 2007.12.3 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Creating shapes using Geometry
Hello Renan,
Now I'm asking for that example code you've offered me, if that still
stands... I haven't tried hard enough, to be honest, but I sure have no
extra time to deal with this properly right now. Not to mention the guy I
work with, which is breathing down my neck... I would appreciate that favor
very much.
As I said, for the part about feeding the data to OSG, there are good
resources and I can't really step you through it, unless you give us
the specific part you're having trouble with.
On the other hand, if you're having trouble calculating the data
itself, I attached a source file that might help for spheres and
cylinders. Now, it's not a silver bullet, as it's pretty old, straight
OpenGL code, and some of the comments are in French (you might use a
translation web site for that ;-) ). But still, it may help you.
In a nutshell, to construct a sphere, I first build a display list
with 1/6 of a sphere, pointing in one direction (say positive X).
Then, I call that display list 6 times with a rotation each time. The
reason for doing it that way is to avoid the singularity at the poles
of the sphere.
For the cylinder, it's basically just making as many circles as
needed, and then capping the tube. (come to think of it, I'm not even
sure these cylinders were capped, as they were meant to represent a
quadric...)
In both cases, I guess the more complicated part is figuring out how
to make faces out of the vertices, rather than calculating the
position of the vertices themselves. So the code may help you out with
that part.
As I said, it's old code, so if you have trouble figuring it out, I'm
afraid I won't be able to help much. But it may be what you need to
nudge you in the right direction.
Good luck,
J-S
--
__
Jean-Sebastien Guay [EMAIL PROTECTED]
http://whitestar02.webhop.org/
This message was sent using IMP, the Internet Messaging Program.
/*--*/
/* */
/**** INF4702 COMPLEMENT D'INFOGRAPHIE *** */
/*Travaux Pratiques */
/* */
/*fichier b_quad.cpp*/
/* */
/*Traitement des surfaces quadriques*/
/* */
/*Rev:07/01/2002y.m.*/
/* */
/*--*/
#includeclass.h
#includeif540.h
#includeVector3.h
#includeQuaternion.h
#includetexture.h
#includetexture_image.h
#includetexture_procedural.h
using namespace math;
using namespace std;
/*--*/
/* */
/*PreProc(Pre-processing: differents calculs...)*/
/* */
/*Params:(void) */
/* */
/*Return:(void) */
/* */
/*Note: Cette methode est appelee apres la lecture des donnees et avant */
/* le calcul des images. C'est l'endroit ideal pour effectuer */
/* les transformations de la surface et calculer des constantes. */
/* */
/*--*/
#ifdefOPEN_GL
extern General general;
voidQuadric::PreProc( void )
{
/*
Matrix Q( this-quad.x,this-mix.z / 2, this-mix.y / 2, this-lin.x /
2,
this-mix.z / 2, this-quad.y,this-mix.x / 2, this-lin.y /
2,
this-mix.y / 2, this-mix.x / 2, this-quad.z,this-lin.z /
2,
this-lin.x / 2, this-lin.y / 2, this-lin.z / 2, this-cst
);
Matrix S = this-transfo;
Matrix Q2 = !S * Q * ~(!S);
this-quad.x = Q2[0][0];
this-quad.y = Q2[1][1];
this-quad.z = Q2[2][2];
this-cst= Q2[3][3];
this-mix.x = Q2[1][2] + Q2[2][1];
this-mix.y = Q2[2][0] + Q2[0][2];
this-mix.z = Q2[1][0] + Q2[0][1];
this-lin.x = Q2[0][3] +
Re: [osg-users] Render To Texture problem in a Reflection algorithm
Hi, do both graphics cards support Frame_Buffer_object ? The problem could be in the renderfallback (i.e. PIXEL_BUFFER_RTT) if they do not support it? Try the different RTT methods if these seems to be the problem. Also , i think you maust set the viewport for FBO to work (i suppose it is set in another place also)...Also, you can set the notifylevel of OSG to WARN or DEBUG and see what is really happens. Good luck. Himar. 2007/12/3, zhangguilian [EMAIL PROTECTED]: Hi, In an algorithm of reflection I used Render To Texture, part of the code is: Texture2D* reflectionTex=new Texture2D;//rtt texture reflectionTex-setTextureSize(512, 512); reflectionTex-setInternalFormat(GL_RGBA); reflectionTex-setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR); reflectionTex-setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR); reflectionTex-setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_EDGE); reflectionTex-setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_EDGE); CameraNode * rttcamera=new CameraNode;//rttcam rttcamera-setCullingMode(CullSettings::NO_CULLING); rttcamera-setCullingActive(false); rttcamera-setClearMask(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); // rttcamera-setViewport(0,0,512,512); rttcamera-setRenderOrder(CameraNode::PRE_RENDER); rttcamera-setRenderTargetImplementation(CameraNode::FRAME_BUFFER_OBJECT,CameraNode::PIXEL_BUFFER_RTT); rttcamera-attach(osg::CameraNode::COLOR_BUFFER,reflectionTex); osg::ClipNode* clipNode = new osg::ClipNode; osg::ClipPlane* clipplane = new osg::ClipPlane; Plane pl(normal,point); clipplane-setClipPlane(pl); clipplane-setClipPlaneNum(0); clipNode-addClipPlane(clipplane); clipNode-addChild(reflectTransform); rttcamera-addChild(clipNode); I don't know why it running well on a GeForce 8800 GTS/PCI/SSE2 from NVIDIA Corporation but doesn't have any reflection effect on a GeForce4 MX 440/AGP/SSE2 from NVIDIA Corporation, and while I add a line:rttcamera-setViewport(0,0,512,512),the later machine(GeForce4 MX 440/AGP/SSE2 from NVIDIA Corporation) can have reflect effect,but a strange phenomena appears: an arbitrary window(relative or irrelative with the program) over it will destroy the reflction map and the area destroyed will move with the window over it (once the window over it moves ,the destroyed area move too) , I don't know what have happend and I eagerly to know how to solve the problem. Thanks very much! zhangguilian 2007.12.3 ___ 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] osgEphemeris Moon Phase
Will osgEphemeris auto compute the moon phase basing on the day of the year? Is it possible to manually set the moon phase percentage? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
