Re: [osg-users] Get A line on the terrain surrface at current lod level
On Tue, Jun 24, 2008 at 2:34 AM, ZHMW [EMAIL PROTECTED] wrote: Hi Robert, I'm pleased to dive in a code, I want to release the method get/setEyePoint(osg::Vec3 ) and getDistanceToEyePoint() to select the right level of lod, also change the code of apply(lod ) and apply(PagedLOD ), and then add some method to set the traverse mode( the heightest level of lod mode and the right level mode ) for user. Is that would be work? I guess so, try it and see. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Get A line on the terrain surrface at current lod level
Hi Davd, ElevationSlice is designed to extract the high res level. Selecting the elevations that are on screen would require a visitor that makes LOD decisions based on a view frustum - this could be written - a variation/tweaks of the osgUtil::IntersectionVisitor for instance. You are welcome to dive in a code such a solution. Robert. On Mon, Jun 23, 2008 at 3:09 AM, ZHMW [EMAIL PROTECTED] wrote: Hi everyone. I want a line on the terrain surface, while my terrain data is a paged lod database. when I use osgSim::ElevationSlice, The visitor(osgUtil::IntersectionVisitor) always go to the max valid level of the terrain detail. so when i draw the line of ElevationSlice's result, the line is not exactly on the surface of terrain. Is there any visitor like cullvisitor can go to current valid lod level? and then I can draw the ElevationSlice's result line on the surface always. best wishes. zhmw ___ 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] Get A line on the terrain surrface at current lod level
Hi David and Robert, I have not followed this discussion, but have recently been working on something similar myself other software. Would it not be advantagous to have a callback function as part of the terrain LOD block, so that each time there is a change of LOD, the terrain block is updated, and calls a callback object to update its elevations / vertices? Also the callback object will have to be moved to the correct LOD block. Erlend. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: 23. juni 2008 10:05 To: OpenSceneGraph Users Subject: Re: [osg-users] Get A line on the terrain surrface at current lod level Hi Davd, ElevationSlice is designed to extract the high res level. Selecting the elevations that are on screen would require a visitor that makes LOD decisions based on a view frustum - this could be written - a variation/tweaks of the osgUtil::IntersectionVisitor for instance. You are welcome to dive in a code such a solution. Robert. On Mon, Jun 23, 2008 at 3:09 AM, ZHMW [EMAIL PROTECTED] wrote: Hi everyone. I want a line on the terrain surface, while my terrain data is a paged lod database. when I use osgSim::ElevationSlice, The visitor(osgUtil::IntersectionVisitor) always go to the max valid level of the terrain detail. so when i draw the line of ElevationSlice's result, the line is not exactly on the surface of terrain. Is there any visitor like cullvisitor can go to current valid lod level? and then I can draw the ElevationSlice's result line on the surface always. best wishes. zhmw ___ 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Get A line on the terrain surrface at current lod level
Hi Robert, I'm pleased to dive in a code, I want to release the method get/setEyePoint(osg::Vec3 ) and getDistanceToEyePoint() to select the right level of lod, also change the code of apply(lod ) and apply(PagedLOD ), and then add some method to set the traverse mode( the heightest level of lod mode and the right level mode ) for user. Is that would be work? Best Wishes. zhmw ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Get A line on the terrain surrface at current lod level
Hi everyone. I want a line on the terrain surface, while my terrain data is a paged lod database. when I use osgSim::ElevationSlice, The visitor(osgUtil::IntersectionVisitor) always go to the max valid level of the terrain detail. so when i draw the line of ElevationSlice's result, the line is not exactly on the surface of terrain. Is there any visitor like cullvisitor can go to current valid lod level? and then I can draw the ElevationSlice's result line on the surface always. best wishes. zhmw ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
