Re: [osg-users] OSG + sky
Hi Jim, do you have a example or demo of the sky-dome implemenation with the clouds ? /adegli 2007/11/1, Jim Brooks [EMAIL PROTECTED]: I want to integrate enviroment in my application, for example clouds and sky. As far as my knowledge is concerned this is not possible in OSG currenly. Can someone tell me the alternatives. OSG can be used to render a sky dome/box and clouds (I've done it). For cumulus clouds, used libnoise to procedurally-generate textures and and a custom sprite node that rendered a set of viewplane-aligned blended quads (OSG::Billboard has/had problems staying rotated to viewplane). __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Demo.... Kd-Tree
http://webaddon3d.assoftware.ch/AE/RTTest.rar /adegli -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] translate transformation on projection
On 10/31/07, Terry Welsh [EMAIL PROTECTED] wrote: If you didn't multiply this translation into the projection matrix, then all cameras would render the same eye space, and you'd get the same image from all cameras. If you tried to do this by modifying the modelview matrix instead of the projection matrix, the images wouldn't tile seamlessly. How does this cause tiling problems? I have still never found a good reason to put translations or rotations in the projection matrix since this tends to cause problems with fog and lighting. A powerwall is an example where the view matrix stays constant between cameras but the slave cameras use a post translation of the projection matrix to capture different parts of the display. The osgwindow example does this in minature. The result is jus sheared projection matrix. A cylindrical display you'd rotate the view matrix for each of the slaves but keep the projection matrix the same. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] A parameter in VirtualPlanetBuilder-0.9.1
On 10/31/07, GuiYe [EMAIL PROTECTED] wrote: arguments.getApplicationUsage()-addCommandLineOption(--layer layer_num,Specify the layer that the next source Texture will contribute to..); Who can tell me the meaning of the parameter and how to use this parameter? I can't really add much beyond the command line documentation, a layer in VPB is simply a separate texture unit, a database with just layer 0 will have just a single texture applied to texture unit 0, a database with a layer 0 and layer 1 will have two texture units used 0 and 1. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to detect collisions ?
Try Node::getWorldMatrices() On 11/1/07, Cervantes Pintor Pedro [EMAIL PROTECTED] wrote: Hi, I'm trying to detect a collision between two objects by simply using the bounding sphere of those objects. So i need to collect the world transformation for each object and then translate those spheres so then I can use the intersects method. Now the question is, what would be the easiest way to keep track of the acumulated transformations for each object? Is there any NodeVisitor that keeps track of this ? Thanks in advance to all replys ___ 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] HUD in multiple display
Hi Guys I had created a HUD for text display and added in the root node. For multiple screen display I added the slaves in viewer. Now I am getting the text on every slave camera which I don't want. I want it to be in only one display. What sould I do for this ? Thanks - Santosh ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + sky
Just some more suggestions for references ... (1) osgEphemeris, by Don Burns (http://andesengineering.com/Projects/OsgEphemeris) - uses OSG (and osgProducer) to create virtual environments for sky, moon, planets, and stars. (2) Delta3D (http://www.delta3d.org http://www.delta3d.org/ ) - uses OSG in developing a gaming and simulation engine. (3) FlightGear (http://www.flightgear.org http://www.flightgear.org/ ) - SVN project uses OSG, but prior releases use straight OpenGL for environment rendering (I believe this part is handled using SimGear, www.simgear.org http://www.simgear.org/ ). All references are open-source, so they should provide some good examples how environment rendering is handled both with OSG and OpenGL. chuck From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adrian Egli Sent: Thursday, November 01, 2007 3:00 AM To: OpenSceneGraph Users Subject: Re: [osg-users] OSG + sky Hi Jim, do you have a example or demo of the sky-dome implemenation with the clouds ? /adegli 2007/11/1, Jim Brooks [EMAIL PROTECTED] : I want to integrate enviroment in my application, for example clouds and sky. As far as my knowledge is concerned this is not possible in OSG currenly. Can someone tell me the alternatives. OSG can be used to render a sky dome/box and clouds (I've done it). For cumulus clouds, used libnoise to procedurally-generate textures and and a custom sprite node that rendered a set of viewplane-aligned blended quads (OSG::Billboard has/had problems staying rotated to viewplane). __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Demo.... Kd-Tree
I can't test it under Linux, do you have the source tree, i ll try to compile it Adrian Egli wrote: http://webaddon3d.assoftware.ch/AE/RTTest.rar /adegli -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- +33 (0) 6 63 20 03 56 Cedric Pinson mailto:[EMAIL PROTECTED] http://www.plopbyte.net ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] HUD in multiple display
Hi Santosh, On 11/1/07, santosh [EMAIL PROTECTED] wrote: I had created a HUD for text display and added in the root node. For multiple screen display I added the slaves in viewer. Now I am getting the text on every slave camera which I don't want. I want it to be in only one display. What sould I do for this ? osgViewer::CompositeViewer can do this by just placing the HUD views on each window you required. Alternatively you can do this using Viewer and slave cameras. For the HUD Cameras you simply assign it to the GraphicsWindow you want it to appear. Doing it in the scene graph is possible, and in the past as the be the most straight forward way of doing it - but it has the draw back that every main camera will have the nested HUD camera in it. The osghud example in 2.x illustrate al these combinations. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] HUD in multiple display
Hi Santosh, You can do this with node masks. Set the node mask for the HUD camera to 0x1: hudCamera-setNodeMask(0x0001); Then set the cull mask for all cameras in viewer. For the camera in which you want the HUD to display: masterCamera-setCullMask(0xfffF); For all other cameras: slaveCamera[N]-setCullMask(0xfffE); The masks will be and-ed, and the HUD will be culled out of all slave cameras. This has worked for me with the composite viewer. I haven't done any slave cameras, but I imagine something similar will work. Hope this helps, Justin -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of santosh Sent: Thursday, November 01, 2007 8:37 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] HUD in multiple display Hi Guys I had created a HUD for text display and added in the root node. For multiple screen display I added the slaves in viewer. Now I am getting the text on every slave camera which I don't want. I want it to be in only one display. What sould I do for this ? Thanks - Santosh ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + sky
Adrian Egli wrote: Hi Jim, do you have a example or demo The Combat Simulator Project (CSP) http://csp.sourceforge.net/wiki/Main_Page the sky is also used by: Global Conflict Blue (GCB) http://gcblue.com/wiki/index.php/Main_Page both are gpl projects regards :) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Demo.... Kd-Tree
:-) no source at the moment for this version, look through the forum and you will find the source 2007/11/1, Cedric Pinson [EMAIL PROTECTED]: I can't test it under Linux, do you have the source tree, i ll try to compile it Adrian Egli wrote: http://webaddon3d.assoftware.ch/AE/RTTest.rar /adegli -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- +33 (0) 6 63 20 03 56 Cedric Pinson mailto:[EMAIL PROTECTED] http://www.plopbyte.net ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgconv
Robert, osgconv --compressed still doesn't work in windows. Here's the output from osg 2.2: Failed to create pbuffer, failing back to normal graphics window. Error: Unable to create graphis context - cannot run compression Data written to 'xxx.ive'. John ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG crash in _lock_fhandle
Hi there, I would like to upload .net files in osg. How do I go about it? Thanx, Felix On 9/26/07, Gert van Maren [EMAIL PROTECTED] wrote: Hi Robert, Thanks for the stack trace but it doesn't really help me much in working out what might be amiss. Does this crash on exit occur in the OSG examples or just your app? I haven't tried any of the OSG examples. It happens in our app when exiting in window mode via the window 'x'. It happens only once, twice a day while I am debugging so hard to catch. Does it happen on all machines? Just tried it on my dual core machine. Have you tried changing the threading model of the viewer? No I haven't. It is hard to catch it. Will try and get more consistent crashes. Gert -- Gert van Maren Head of Research Development K2Vi Virtual Reality Software Data Interface Technologies Ltd Phone: +64 21 2855581 Email: [EMAIL PROTECTED] Web: http://www.k2vi.com ___ 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] When is it safe to modify the scenegraph?
Hi,
I am updating to osg2.2 and wnat to use the new threading models, but I
am experiencing problems when using a threading model different to
SingleThreaded.
So when it is safe to modify the scenegraph? My scenegraph is very
dynamic, lots of geometries get added, recomputed or removed.
my run-loop looks something like this
while(!_done) {
// do my animations
af-animate();
advance();
eventTraversal();
updateTraversal();
renderingTraversal();
}
One of the observed problems is a crash, when I dirty the displaylist of
a geometry (inside animate()) and when this geometry get drawn at the
same time. My code Crashes with threading-model
cullThreadPerCameraDrawThreadPerContext, all other seem to work.
So, when it is safe to modify the scenegraph?
thanks,
Stephan
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Re: [osg-users] When is it safe to modify the scenegraph?
HI Stephan,
Any Drawable or StateSet that is modified needs to have its
DataVariance set to DYNAMIC when you take advantage of the
DrawThreadPerContext and CullThreadPerCameraDrawThreadPerContext
threading models.
This prevents the next frame from starting till all the dynamic bits
of the scene graph being drawn are dispatched into the OpenGL fifo,
and therefore prevents you from modifying things at the same time they
are being read from.
Robert.
On 11/1/07, Stephan Maximilian Huber [EMAIL PROTECTED] wrote:
Hi,
I am updating to osg2.2 and wnat to use the new threading models, but I
am experiencing problems when using a threading model different to
SingleThreaded.
So when it is safe to modify the scenegraph? My scenegraph is very
dynamic, lots of geometries get added, recomputed or removed.
my run-loop looks something like this
while(!_done) {
// do my animations
af-animate();
advance();
eventTraversal();
updateTraversal();
renderingTraversal();
}
One of the observed problems is a crash, when I dirty the displaylist of
a geometry (inside animate()) and when this geometry get drawn at the
same time. My code Crashes with threading-model
cullThreadPerCameraDrawThreadPerContext, all other seem to work.
So, when it is safe to modify the scenegraph?
thanks,
Stephan
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[osg-users] Scene renders black when replacing a ShadowedScene
I'm getting a problem when assigning a new shadowed scene to the viewer.
What seems to happen is that once the first scene has been rendered,
the assignment of a new shadowed scene results in a everything in the
scene being drawn black. Also odd is the fact that there doesn't seem
to be a problem when a texture is assigned to objects being drawn.
I have created a minimal example that exhibits the problem, and pasted
it below.
Any ideas what's going wrong? Can anyone reproduce the effect?
[I'm using osg2.2 on windowsXP with Radeon X300 with latest drivers.]
#include osg/ShapeDrawable
#include osg/Geode
#include osgGA/TrackballManipulator
#include osgShadow/ShadowedScene
#include osgShadow/ShadowMap
#include osgDB/ReadFile
#include osgViewer/Viewer
const int ReceivesShadowTraversalMask = 0x1;
const int CastsShadowTraversalMask = 0x2;
osg::Node* createShadowedScene(bool withTexture)
{
osgShadow::ShadowedScene* shadowedScene = new osgShadow::ShadowedScene;
shadowedScene-setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene-setCastsShadowTraversalMask(CastsShadowTraversalMask);
shadowedScene-setShadowTechnique(new osgShadow::ShadowMap());
osg::LightSource* lightSource = new osg::LightSource;
lightSource-getLight()-setPosition(osg::Vec4(0, 0.2, 1, 0));
osg::ShapeDrawable * shape = new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 200.0));
shape-setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
osg::Geode* geode = new osg::Geode();
geode-addDrawable(shape);
if (withTexture)
{
geode-getOrCreateStateSet()-setTextureAttributeAndModes( 0,
new osg::Texture2D(osgDB::readImageFile(Images/lz.rgb)),
osg::StateAttribute::ON);
}
shadowedScene-addChild(geode);
shadowedScene-addChild(lightSource);
return shadowedScene;
}
int main(int argc, char** argv)
{
bool withTexture = false;
osgViewer::Viewer viewer;
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.realize();
viewer.setSceneData(createShadowedScene(withTexture));
#if 1
// Drawing the frame then assigning a new shadowed scene
// seems to result in scene being rendered black.
// Although, seems ok when texture is assigned to the object.
viewer.frame();
viewer.setSceneData(createShadowedScene(withTexture));
#endif
viewer.run();
return 0;
}
#endif
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Re: [osg-users] Scene renders black when replacing a ShadowedScene
Just to make sure I understand the issue: from what you are describing,
the problem is that non-textured scene is drawn is black.
This is a result of the shader in use, if you are using the one for
textured objects, it will do a texture access on unit 0, and since there
is no bound texture the result is vec4(0,0,0,1), that when multiplied to
any other color value gives black.
This is a result of some polish still needed for ShadowMap, and some of
the options are:
- if using non-textured scene, make use of the relevant shader ( by
setting _shadowTextureUnit to 0, and then init() )
- set a custom shader and use per-object uniform flag to control color
application ( this is what I've done for work )
like this:
if (!s_TexturedObject)
{
color.rgb *= gl_Color.rgb;
color.a = gl_Color.a;
}
else
{
texColor = texture2D(osgShadow_baseTexture, gl_TexCoord[0].st);
color *= texColor;
}
- the most elegant solution :
create a 'fake' texture with (1,1,1,1) and set it to the root of the
scene, so that it will texture any object that was not textured, but
it's superseded by any more localized textures, this way one shader will
work for all objects.
This is borrowed from ParallelSplitShadowMap, and I hope I'll have time
to integrate the same idea in ShadowMap.
Cheers
Mihai
Chris Denham wrote:
I'm getting a problem when assigning a new shadowed scene to the viewer.
What seems to happen is that once the first scene has been rendered,
the assignment of a new shadowed scene results in a everything in the
scene being drawn black. Also odd is the fact that there doesn't seem
to be a problem when a texture is assigned to objects being drawn.
I have created a minimal example that exhibits the problem, and pasted
it below.
Any ideas what's going wrong? Can anyone reproduce the effect?
[I'm using osg2.2 on windowsXP with Radeon X300 with latest drivers.]
#include osg/ShapeDrawable
#include osg/Geode
#include osgGA/TrackballManipulator
#include osgShadow/ShadowedScene
#include osgShadow/ShadowMap
#include osgDB/ReadFile
#include osgViewer/Viewer
const int ReceivesShadowTraversalMask = 0x1;
const int CastsShadowTraversalMask = 0x2;
osg::Node* createShadowedScene(bool withTexture)
{
osgShadow::ShadowedScene* shadowedScene = new osgShadow::ShadowedScene;
shadowedScene-setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene-setCastsShadowTraversalMask(CastsShadowTraversalMask);
shadowedScene-setShadowTechnique(new osgShadow::ShadowMap());
osg::LightSource* lightSource = new osg::LightSource;
lightSource-getLight()-setPosition(osg::Vec4(0, 0.2, 1, 0));
osg::ShapeDrawable * shape = new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 200.0));
shape-setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
osg::Geode* geode = new osg::Geode();
geode-addDrawable(shape);
if (withTexture)
{
geode-getOrCreateStateSet()-setTextureAttributeAndModes( 0,
new osg::Texture2D(osgDB::readImageFile(Images/lz.rgb)),
osg::StateAttribute::ON);
}
shadowedScene-addChild(geode);
shadowedScene-addChild(lightSource);
return shadowedScene;
}
int main(int argc, char** argv)
{
bool withTexture = false;
osgViewer::Viewer viewer;
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.realize();
viewer.setSceneData(createShadowedScene(withTexture));
#if 1
// Drawing the frame then assigning a new shadowed scene
// seems to result in scene being rendered black.
// Although, seems ok when texture is assigned to the object.
viewer.frame();
viewer.setSceneData(createShadowedScene(withTexture));
#endif
viewer.run();
return 0;
}
#endif
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Re: [osg-users] Demo.... Kd-Tree
Hi Adrian, kd-tree looks like a nice structure to have, in my case for other things than ray-tracing, like optimizing collisions and path-finding, to be local to one partition. Are you planning to integrate kd-tree into osg as a generic algorithm ? In that case how could it be used ? If you want some help in this project, let me know how I could start ( not much ray-tracing experience ), but another pair of eyes might be useful. Cheers Mihai Adrian Egli wrote: :-) no source at the moment for this version, look through the forum and you will find the source 2007/11/1, Cedric Pinson [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]: I can't test it under Linux, do you have the source tree, i ll try to compile it Adrian Egli wrote: http://webaddon3d.assoftware.ch/AE/RTTest.rar /adegli -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto:osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- +33 (0) 6 63 20 03 56 Cedric Pinson mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] http://www.plopbyte.net ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto:osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Adrian Egli ___ 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] Shadowmap fidelity for an enironment and objects within it
Hi, I'm a developer with Delta3D which uses OSG and I've recently converted a scene to use shadowmaps. I've managed to get decent results on the level using a 2048x2048 shadow map but any smaller object within the level such as a character produces shadows of unacceptable quality. Please see the following images: Image of the entire scene: http://img504.imageshack.us/my.php?image=fullscenesp7.jpg Character1: http://img64.imageshack.us/my.php?image=soldier1nj1.jpg Character2: http://img64.imageshack.us/my.php?image=soldier2ra7.jpg Character3: http://img229.imageshack.us/my.php?image=soldier3oo3.jpg My question: is there a way to use multiple shadow maps in a scene? Maybe one for each character? Thanks, Michael Guerrero ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Shadowmap fidelity for an enironment and objects within it
Hi Michael, Right now there is no implementation that uses multiple simple shadow maps in osg. There is ParalelSplitShadowMap, that uses multiple maps but the split is based on the view frustum, not individual characters. Try and see if it gives you nice results, it's meant for use large terrains with better quality closer to the camera eye. The modifications to ShadowMap would not be extensive, but there would be a need for a vector of ShadowMap cameras, textures and texgens with the relevant frustum updates. I would suggest either using node masks to handle which objects cast shadows, or maybe spotlights with the target centered on characters, on a relative position to the main transform of the object, so they follow along. You are welcome to pitch-in and adapt ShadowMap to this use. Cheers Mihai Guerrero, Michael (CIV) wrote: Hi, I’m a developer with Delta3D which uses OSG and I’ve recently converted a scene to use shadowmaps. I’ve managed to get decent results on the level using a 2048x2048 shadow map but any smaller object within the level such as a character produces shadows of unacceptable quality. Please see the following images: Image of the entire scene: http://img504.imageshack.us/my.php?image=fullscenesp7.jpg Character1: http://img64.imageshack.us/my.php?image=soldier1nj1.jpg Character2: http://img64.imageshack.us/my.php?image=soldier2ra7.jpg Character3: http://img229.imageshack.us/my.php?image=soldier3oo3.jpg My question: is there a way to use multiple shadow maps in a scene? Maybe one for each character? Thanks, Michael Guerrero ___ 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] How to get eye positions in passive stereo?
Hi, We are trying to figure out at what positions the eyes are in stereo mode. The scene gets rendered correctly, but the following code returns the same exact positions for leftEye and rightEye: osg::Camera* camLeft = _renderStageLeft-getCamera(); osg::Camera* camRight = _renderStageRight-getCamera(); Vec3 leftEye, rightEye, center, up; camLeft-getViewMatrixAsLookAt(leftEye, center, up); camRight-getViewMatrixAsLookAt(rightEye, center, up); osg::notify(osg::DEBUG_INFO) Left eye:leftEye[0] ,leftEye[1] ,leftEye[2] std::endl; osg::notify(osg::DEBUG_INFO) Right eye: rightEye[0] , rightEye[1] , rightEye[2] std::endl; How can we get the correct positions, which should be 1 IOD apart from each other? Jurgen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Scene renders black when replacing a ShadowedScene
:-) Yes a fake texture can help GLSL shader based issue. Feel free to
migrate the other shadow
technics. And if you like working with PSSM feel free to fix the little
issues we still have. i don't
get the time to work on PSSM for next generation.
/adegli
2007/11/1, Mihai Radu [EMAIL PROTECTED]:
Just to make sure I understand the issue: from what you are describing,
the problem is that non-textured scene is drawn is black.
This is a result of the shader in use, if you are using the one for
textured objects, it will do a texture access on unit 0, and since there
is no bound texture the result is vec4(0,0,0,1), that when multiplied to
any other color value gives black.
This is a result of some polish still needed for ShadowMap, and some of
the options are:
- if using non-textured scene, make use of the relevant shader ( by
setting _shadowTextureUnit to 0, and then init() )
- set a custom shader and use per-object uniform flag to control color
application ( this is what I've done for work )
like this:
if (!s_TexturedObject)
{
color.rgb *= gl_Color.rgb;
color.a = gl_Color.a;
}
else
{
texColor = texture2D(osgShadow_baseTexture, gl_TexCoord[0].st);
color *= texColor;
}
- the most elegant solution :
create a 'fake' texture with (1,1,1,1) and set it to the root of the
scene, so that it will texture any object that was not textured, but
it's superseded by any more localized textures, this way one shader will
work for all objects.
This is borrowed from ParallelSplitShadowMap, and I hope I'll have time
to integrate the same idea in ShadowMap.
Cheers
Mihai
Chris Denham wrote:
I'm getting a problem when assigning a new shadowed scene to the viewer.
What seems to happen is that once the first scene has been rendered,
the assignment of a new shadowed scene results in a everything in the
scene being drawn black. Also odd is the fact that there doesn't seem
to be a problem when a texture is assigned to objects being drawn.
I have created a minimal example that exhibits the problem, and pasted
it below.
Any ideas what's going wrong? Can anyone reproduce the effect?
[I'm using osg2.2 on windowsXP with Radeon X300 with latest drivers.]
#include osg/ShapeDrawable
#include osg/Geode
#include osgGA/TrackballManipulator
#include osgShadow/ShadowedScene
#include osgShadow/ShadowMap
#include osgDB/ReadFile
#include osgViewer/Viewer
const int ReceivesShadowTraversalMask = 0x1;
const int CastsShadowTraversalMask = 0x2;
osg::Node* createShadowedScene(bool withTexture)
{
osgShadow::ShadowedScene* shadowedScene = new
osgShadow::ShadowedScene;
shadowedScene-setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene-setCastsShadowTraversalMask(CastsShadowTraversalMask);
shadowedScene-setShadowTechnique(new osgShadow::ShadowMap());
osg::LightSource* lightSource = new osg::LightSource;
lightSource-getLight()-setPosition(osg::Vec4(0, 0.2, 1, 0));
osg::ShapeDrawable * shape = new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 200.0));
shape-setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
osg::Geode* geode = new osg::Geode();
geode-addDrawable(shape);
if (withTexture)
{
geode-getOrCreateStateSet()-setTextureAttributeAndModes( 0,
new osg::Texture2D(osgDB::readImageFile(Images/lz.rgb)),
osg::StateAttribute::ON);
}
shadowedScene-addChild(geode);
shadowedScene-addChild(lightSource);
return shadowedScene;
}
int main(int argc, char** argv)
{
bool withTexture = false;
osgViewer::Viewer viewer;
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.realize();
viewer.setSceneData(createShadowedScene(withTexture));
#if 1
// Drawing the frame then assigning a new shadowed scene
// seems to result in scene being rendered black.
// Although, seems ok when texture is assigned to the object.
viewer.frame();
viewer.setSceneData(createShadowedScene(withTexture));
#endif
viewer.run();
return 0;
}
#endif
___
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___
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--
Adrian Egli
___
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osg-users@lists.openscenegraph.org
Re: [osg-users] Scene renders black when replacing a ShadowedScene
Hi Chris, Adrian
Here's an updated version of ShadowMap[.cpp] that includes the 'fake'
texture.
Now any model will show up properly, textured or nor.
To see run [the dumptruck is not textured] :
osgshadow dumptruck.osg
Adrian, in your code (PSSM) you assign black(0,0,0,0) as the color for
the 'fake', this gives the same result as a bad texture access, it works
perfectly if you set it to white(1,1,1,1).
This is a nice loose end to take care of, I can now do without an 'if'
in GLSL, and since it's a pretty costly operation, every little bit helps :)
I will submit this to Robert for svn.
Cheers
Mihai
cid:part1.08090808.06060803@cm-labs.comAdrian Egli wrote:
:-) Yes a fake texture can help GLSL shader based issue. Feel free to
migrate the other shadow
technics. And if you like working with PSSM feel free to fix the
little issues we still have. i don't
get the time to work on PSSM for next generation.
/adegli
2007/11/1, Mihai Radu [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]:
Just to make sure I understand the issue: from what you are
describing,
the problem is that non-textured scene is drawn is black.
This is a result of the shader in use, if you are using the one for
textured objects, it will do a texture access on unit 0, and since
there
is no bound texture the result is vec4(0,0,0,1), that when
multiplied to
any other color value gives black.
This is a result of some polish still needed for ShadowMap, and
some of
the options are:
- if using non-textured scene, make use of the relevant shader ( by
setting _shadowTextureUnit to 0, and then init() )
- set a custom shader and use per-object uniform flag to control color
application ( this is what I've done for work )
like this:
if (!s_TexturedObject)
{
color.rgb *= gl_Color.rgb;
color.a = gl_Color.a;
}
else
{
texColor = texture2D(osgShadow_baseTexture,
gl_TexCoord[0].st);
color *= texColor;
}
- the most elegant solution :
create a 'fake' texture with (1,1,1,1) and set it to the root
of the
scene, so that it will texture any object that was not textured, but
it's superseded by any more localized textures, this way one
shader will
work for all objects.
This is borrowed from ParallelSplitShadowMap, and I hope I'll have
time
to integrate the same idea in ShadowMap.
Cheers
Mihai
Chris Denham wrote:
I'm getting a problem when assigning a new shadowed scene to the
viewer.
What seems to happen is that once the first scene has been rendered,
the assignment of a new shadowed scene results in a everything
in the
scene being drawn black. Also odd is the fact that there doesn't
seem
to be a problem when a texture is assigned to objects being drawn.
I have created a minimal example that exhibits the problem, and
pasted
it below.
Any ideas what's going wrong? Can anyone reproduce the effect?
[I'm using osg2.2 on windowsXP with Radeon X300 with latest
drivers.]
#include osg/ShapeDrawable
#include osg/Geode
#include osgGA/TrackballManipulator
#include osgShadow/ShadowedScene
#include osgShadow/ShadowMap
#include osgDB/ReadFile
#include osgViewer/Viewer
const int ReceivesShadowTraversalMask = 0x1;
const int CastsShadowTraversalMask = 0x2;
osg::Node* createShadowedScene(bool withTexture)
{
osgShadow::ShadowedScene* shadowedScene = new
osgShadow::ShadowedScene;
shadowedScene-setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene-setCastsShadowTraversalMask(CastsShadowTraversalMask);
shadowedScene-setShadowTechnique(new osgShadow::ShadowMap());
osg::LightSource* lightSource = new osg::LightSource;
lightSource-getLight()-setPosition(osg::Vec4(0, 0.2, 1, 0));
osg::ShapeDrawable * shape = new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 200.0));
shape-setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
osg::Geode* geode = new osg::Geode();
geode-addDrawable(shape);
if (withTexture)
{
geode-getOrCreateStateSet()-setTextureAttributeAndModes( 0,
new osg::Texture2D(osgDB::readImageFile(Images/lz.rgb)),
osg::StateAttribute::ON);
}
shadowedScene-addChild(geode);
shadowedScene-addChild(lightSource);
return shadowedScene;
}
int main(int argc, char** argv)
{
bool withTexture = false;
Re: [osg-users] Shadowmap fidelity for an enironment and objects within it
Hi Michael, may you need just to change to the parallel split shadow map. osgshadow --pssm ... /adegli 2007/11/1, Guerrero, Michael (CIV) [EMAIL PROTECTED]: Hi, I'm a developer with Delta3D which uses OSG and I've recently converted a scene to use shadowmaps. I've managed to get decent results on the level using a 2048x2048 shadow map but any smaller object within the level such as a character produces shadows of unacceptable quality. Please see the following images: Image of the entire scene: http://img504.imageshack.us/my.php?image=fullscenesp7.jpg Character1: http://img64.imageshack.us/my.php?image=soldier1nj1.jpg Character2: http://img64.imageshack.us/my.php?image=soldier2ra7.jpg Character3: http://img229.imageshack.us/my.php?image=soldier3oo3.jpg My question: is there a way to use multiple shadow maps in a scene? Maybe one for each character? Thanks, Michael Guerrero ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Adrian Egli ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Scene renders black when replacing a ShadowedScene
Thanks Mihai, can you also change the PSSM implementation and update the
code, so robert has only one review to do !
if i will submiss the pssm stuff, he has to review two equal changes.
thanks.
may you can also have a look at PSSM, there are other mails on this topic.
the GLSL shader doesn't work very nice for every
env. may you can test it (The smooth stuff in the PSSM doesn't work nice,
for my ATI card is nice but on others, i don't know)
/Adegli
2007/11/1, Mihai Radu [EMAIL PROTECTED]:
Hi Chris, Adrian
Here's an updated version of ShadowMap[.cpp] that includes the 'fake'
texture.
Now any model will show up properly, textured or nor.
To see run [the dumptruck is not textured] :
osgshadow dumptruck.osg
Adrian, in your code (PSSM) you assign black(0,0,0,0) as the color for
the 'fake', this gives the same result as a bad texture access, it works
perfectly if you set it to white(1,1,1,1).
This is a nice loose end to take care of, I can now do without an 'if'
in GLSL, and since it's a pretty costly operation, every little bit helps
:)
I will submit this to Robert for svn.
Cheers
Mihai
cid:part1.08090808.06060803@cm-labs.comAdrian Egli wrote:
:-) Yes a fake texture can help GLSL shader based issue. Feel free to
migrate the other shadow
technics. And if you like working with PSSM feel free to fix the
little issues we still have. i don't
get the time to work on PSSM for next generation.
/adegli
2007/11/1, Mihai Radu [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]:
Just to make sure I understand the issue: from what you are
describing,
the problem is that non-textured scene is drawn is black.
This is a result of the shader in use, if you are using the one for
textured objects, it will do a texture access on unit 0, and since
there
is no bound texture the result is vec4(0,0,0,1), that when
multiplied to
any other color value gives black.
This is a result of some polish still needed for ShadowMap, and
some of
the options are:
- if using non-textured scene, make use of the relevant shader ( by
setting _shadowTextureUnit to 0, and then init() )
- set a custom shader and use per-object uniform flag to control
color
application ( this is what I've done for work )
like this:
if (!s_TexturedObject)
{
color.rgb *= gl_Color.rgb;
color.a = gl_Color.a;
}
else
{
texColor = texture2D(osgShadow_baseTexture,
gl_TexCoord[0].st);
color *= texColor;
}
- the most elegant solution :
create a 'fake' texture with (1,1,1,1) and set it to the root
of the
scene, so that it will texture any object that was not textured, but
it's superseded by any more localized textures, this way one
shader will
work for all objects.
This is borrowed from ParallelSplitShadowMap, and I hope I'll have
time
to integrate the same idea in ShadowMap.
Cheers
Mihai
Chris Denham wrote:
I'm getting a problem when assigning a new shadowed scene to the
viewer.
What seems to happen is that once the first scene has been
rendered,
the assignment of a new shadowed scene results in a everything
in the
scene being drawn black. Also odd is the fact that there doesn't
seem
to be a problem when a texture is assigned to objects being drawn.
I have created a minimal example that exhibits the problem, and
pasted
it below.
Any ideas what's going wrong? Can anyone reproduce the effect?
[I'm using osg2.2 on windowsXP with Radeon X300 with latest
drivers.]
#include osg/ShapeDrawable
#include osg/Geode
#include osgGA/TrackballManipulator
#include osgShadow/ShadowedScene
#include osgShadow/ShadowMap
#include osgDB/ReadFile
#include osgViewer/Viewer
const int ReceivesShadowTraversalMask = 0x1;
const int CastsShadowTraversalMask = 0x2;
osg::Node* createShadowedScene(bool withTexture)
{
osgShadow::ShadowedScene* shadowedScene = new
osgShadow::ShadowedScene;
shadowedScene-setReceivesShadowTraversalMask(ReceivesShadowTraversalMask);
shadowedScene-setCastsShadowTraversalMask(CastsShadowTraversalMask);
shadowedScene-setShadowTechnique(new osgShadow::ShadowMap());
osg::LightSource* lightSource = new osg::LightSource;
lightSource-getLight()-setPosition(osg::Vec4(0, 0.2, 1, 0));
osg::ShapeDrawable * shape = new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 200.0));
