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,0.01,1000000);
else
viewer->getCamera()->setProjectionMatrixAsPerspective(
FOV_Y,FOV_X/FOV_Y,0.01,1000000);
}
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 );
}
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=8018#8018
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