Hi Dirk,
>> I am working with a head-tracked stereo setup in front of a big >> projection wall, experiencing exactly the described phenomenon. > > Hm, I'm not sure I get it. What phenomenon are you seeing? The problem with head tracked projection in front of big screens is, that you are not at the center of the screen anymore when moving. But any usual projection assumes that you are looking to the center of the screen. Usually people are not moving in front of there screens. Example: You are looking straight at a big cube. Now you move left while beeing tracked. The cube moves right on the screen. But as you are already moving by yourself, it would be correct, if the cube wouldn't move. Instead the perspective to the cube should change. (Imagine a 2 meter wide screen..) In my case it is a big virtual house wall. When i am moving away from the screen center (every axis), the wall moves (inversely). To avoid that effect the ProjectionStereoCameraDecorator was introduced, if i got the idea of the mentioned part of documentation. "8.3.3.1 StereoDecorators There are actually two different decorators for stereo solutions. Both have some attributes in common. The eye separation de?nes the distance between the eyes and is provided in model units. You should be very careful with this value as too small or big values will destroy the stereo effect(and may make people sick...). Finally you need to tell the decorator if it is the left or the right one. This is handeled by a simple boolean variable where true indicates the left eye. OSG::ShearedStereoCameraDecorators are used for typical passive stereo applications, where two beamers are projecting the image and the audience is wearing polarising glasses. They add one additional attribute, the distance to the zero parallax plane. The zero parallax plane is a plane where the left and right image perfectly overlap, i.e. the parallax is zero. This value should reflect the distance from the users point of view to the imageplane. [..] OSG::ProjectionStereoCameraDecorators are mainly used for head-tracked stereo applications like a CAVE.I will not discuss this decorator here unless there is apublic demand for it. ;-)" (Oliver Albert, OpenSG Starter Guide, 1.8.0, Juli 4th 2007) So this is the second source where OSG::ProjectionStereoCameraDecorators are mentioned. But i guess you are right Dirk, it must be a typo, it's all from doxygen. I'll try the ProjectionCameraDecorators now. If the Implementation is not existing anymore, i'll try to manipulate the head (i encapsulated two cameras in a head class) orientation and FOV by my own algorithms. thanks again lars p.s. Is anyone knowing Oliver Albert? ;) ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
