Re: [osg-users] Configuring OSG for stereo
Robert, The problem I was having with convergence/parallax distance was because I was directly setting the camera via viewer-getCameraManipulator()-setByMatrix( R2 * R1 ); So even though I tried setting FusionDistance nothing was happening because the manipulators center point was not getting used. Switching to viewer-getCameraManipulator()-computePosition (eye,center,up); viewer-getCameraManipulator()-home(0); works as expected and problem solved! Thank you. Eric -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=8299#8299 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Configuring OSG for stereo
Hi Eric, On Sun, Mar 8, 2009 at 3:25 AM, Eric Heft osgfo...@tevs.eu wrote: Robert, I converted all the measurements to meters. As I suspected there were no changes since the units should fall out of the calculations. Only if you have all coords in the same units, model and screen parameters. Most models are in meters, the OSG defaults are all in meters so if you want things to work out the box it's best to stick to meters otherwise if you miss one parameter you can get a mixture of units. So the question remains. What controls the depth plane? Um another ambiguous set of language do you mean the convergence/parallax distance? If I use the trackball manipulator and press space the depth plane is set to the center of the objects volume so next week I'll look into what it is doing. The trackball manipulator tells the viewer to scale the interoccular distance by the distance between the eye point and the center of rotation of the trackball. This mode allows you to view molecules up to planets without having to dynamically manage the interoccular distance yourself. The FusionDistance is the name given to the distance between the eye point and center of rotation/pont at which the left and right eye views overlap (which is the image plane of the display system), in hindsight parallax distance would have been a better name... Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Configuring OSG for stereo
Robert, I converted all the measurements to meters. As I suspected there were no changes since the units should fall out of the calculations. So the question remains. What controls the depth plane? If I use the trackball manipulator and press space the depth plane is set to the center of the objects volume so next week I'll look into what it is doing. Thank you, Eric -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=8064#8064 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Configuring OSG for stereo
HI Eric,
The units are assumed to be meters, so please just convert your values
to meters.
Robert.
On Thu, Mar 5, 2009 at 11:57 PM, Eric Heft osgfo...@tevs.eu wrote:
What sets the 'depth' plane when using stereo?
From the docs you have measured and entered values for the following in
inches instead of meters.
setEyeSeparation(EyeSeperation );
setScreenDistance(ScreenDistance);
setScreenHeight(ScreenHeight);
setScreenWidth(ScreenWidth);
setProjectionMatrixAsPerspective(...);
setFusionDistance(mode,value);
I get stereo, its just that the objects are not in the right depth plane.
My screen is 146 inches from the projector. I place an object at (0,0,-146)
and while the size of the object is correct on the screen. The object is way
behind the surface of the screen ( lots of overlap ). I have to move the
object to (0,0,-14) to get zero overlap/disparity.
-- Details --
Using WinXP + OSG 2.5.1 + 2 Projector horizontal span setup running 2048 x
768 resolution.
I load an object created in blender that is a wire frame box 5 units from
edge to edge.
The test application lets me change the following parameters on the fly.
ScreenDistance=146.00
ScreenHeight=64.00
ScreenWidth=87.00
EyeSeperation=2.50
ObjectDistance=146.00
With EyeSeperation set to 0.00 , the wire frame box appears on the projector
screen and measures very close to the expected size of 5 inches across.
When any of the parameters change. I call this:
Code:
void ResetGeometry(void)
{
float FOV_X =
2.0*atan2(ScreenHeight/2.0,(double)ScreenDistance)*180.0/3.14159;
float FOV_Y =
2.0*atan2(ScreenWidth/2.0,(double)ScreenDistance)*180.0/3.14159;
osg::DisplaySettings::instance()-setStereo(stereo);
osg::DisplaySettings::instance()-setEyeSeparation(EyeSeperation );
osg::DisplaySettings::instance()-setScreenDistance(ScreenDistance);
osg::DisplaySettings::instance()-setScreenHeight(ScreenHeight);
osg::DisplaySettings::instance()-setScreenWidth(ScreenWidth);
viewer-setFusionDistance(osgUtil::SceneView::FusionDistanceMode::USE_FUSION_DISTANCE_VALUE,ScreenDistance);
printf(FusionDistance = %6.2f\n,viewer-getFusionDistanceValue());
if (stereo)
viewer-getCamera()-setProjectionMatrixAsPerspective(
FOV_Y,2.0*FOV_X/FOV_Y,0.01,100);
else
viewer-getCamera()-setProjectionMatrixAsPerspective(
FOV_Y,FOV_X/FOV_Y,0.01,100);
}
At the beginning of the program I call this. ( this will be modified once all
the other setup is verified )
Code:
void SetView(void)
{
static osg::Vec3 vtrs;
static osg::Quat qrot;
osg::Matrixd R1;
osg::Matrixd R2;
qrot.makeRotate( osg::DegreesToRadians(0.0), osg::Vec3(1,0,0)
);
vtrs.set( 0, 0, 0);
R1.makeRotate( qrot );
R2.makeTranslate( vtrs );
viewer-getCameraManipulator()-setByMatrix( R2 * R1 );
}
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=8018#8018
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[osg-users] Configuring OSG for stereo
What sets the 'depth' plane when using stereo?
From the docs you have measured and entered values for the following in inches
instead of meters.
setEyeSeparation(EyeSeperation );
setScreenDistance(ScreenDistance);
setScreenHeight(ScreenHeight);
setScreenWidth(ScreenWidth);
setProjectionMatrixAsPerspective(...);
setFusionDistance(mode,value);
I get stereo, its just that the objects are not in the right depth plane.
My screen is 146 inches from the projector. I place an object at (0,0,-146) and
while the size of the object is correct on the screen. The object is way behind
the surface of the screen ( lots of overlap ). I have to move the object to
(0,0,-14) to get zero overlap/disparity.
-- Details --
Using WinXP + OSG 2.5.1 + 2 Projector horizontal span setup running 2048 x 768
resolution.
I load an object created in blender that is a wire frame box 5 units from edge
to edge.
The test application lets me change the following parameters on the fly.
ScreenDistance=146.00
ScreenHeight=64.00
ScreenWidth=87.00
EyeSeperation=2.50
ObjectDistance=146.00
With EyeSeperation set to 0.00 , the wire frame box appears on the projector
screen and measures very close to the expected size of 5 inches across.
When any of the parameters change. I call this:
Code:
void ResetGeometry(void)
{
float FOV_X =
2.0*atan2(ScreenHeight/2.0,(double)ScreenDistance)*180.0/3.14159;
float FOV_Y =
2.0*atan2(ScreenWidth/2.0,(double)ScreenDistance)*180.0/3.14159;
osg::DisplaySettings::instance()-setStereo(stereo);
osg::DisplaySettings::instance()-setEyeSeparation(EyeSeperation );
osg::DisplaySettings::instance()-setScreenDistance(ScreenDistance);
osg::DisplaySettings::instance()-setScreenHeight(ScreenHeight);
osg::DisplaySettings::instance()-setScreenWidth(ScreenWidth);
viewer-setFusionDistance(osgUtil::SceneView::FusionDistanceMode::USE_FUSION_DISTANCE_VALUE,ScreenDistance);
printf(FusionDistance = %6.2f\n,viewer-getFusionDistanceValue());
if (stereo)
viewer-getCamera()-setProjectionMatrixAsPerspective(
FOV_Y,2.0*FOV_X/FOV_Y,0.01,100);
else
viewer-getCamera()-setProjectionMatrixAsPerspective(
FOV_Y,FOV_X/FOV_Y,0.01,100);
}
At the beginning of the program I call this. ( this will be modified once all
the other setup is verified )
Code:
void SetView(void)
{
static osg::Vec3 vtrs;
static osg::Quat qrot;
osg::Matrixd R1;
osg::Matrixd R2;
qrot.makeRotate( osg::DegreesToRadians(0.0), osg::Vec3(1,0,0) );
vtrs.set( 0, 0, 0);
R1.makeRotate( qrot );
R2.makeTranslate( vtrs );
viewer-getCameraManipulator()-setByMatrix( R2 * R1 );
}
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=8018#8018
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