thanks, I'll try that. more problems I'm facing is setting the image internal data type, I've seen in the examples setting the internal type to 3 or 4. what does it mean? how do I set it to float or int? and I couldn't read from the image even that I used code very similar to osgprerender example :(, the image->data() return buffer filled with garbage.
but thanks anyway, Guy. ----- Original Message ----- From: "John Donovan" <[EMAIL PROTECTED]> To: "OpenSceneGraph Users" <osg-users@lists.openscenegraph.org> Sent: Monday, September 17, 2007 3:43 PM Subject: Re: [osg-users] multipass & calculating with shaders > [EMAIL PROTECTED] wrote: > > > second, I want to render single or several (4 - 8) values which represnt some calculation. So I use render to texture. The texture is 1D and to render to it I use orthographic projection, and the viewport fits to the texture dimension. The geometry I render is points. One point per calculation, and each point should result as one pixel. Is this the right way? I has to set the point size to 1.5 to see anything, any ideas why? > > It sounds like you need to offset your point centres by 0.5 I don't have the > spec in front of me, but I think you've got to shift it in the positive > direction on both axes, but you may have to play with the signs until it works :) > > -J > > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > _______________________________________________ > 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
