Hi, Solkar:
Following is the symptoms: There's an earth node under scene root whose
coordinates are between 5000000 and 7000000. And also an ortho-projecting HUD
camera with width 1600 and height 900 is under root.Under the HUD camera, a
geode with text whose position is (1300,500,0) and whose size is (200,75)
exists.Eye position is above the earth surface. The x coords of the geode I got
by osg_viewMatrixInverse*gl_ModelViewMatrix*vertex is less than -1000000.But
the value I want is (1300,500,0).
------------------
Failure is the mother of success.
Wu Zhicheng
------------------ Original ------------------
From: "Solkar Graphics";<[email protected]>;
Date: Thu, Jul 3, 2014 00:45 AM
To: "osg-users"<[email protected]>;
Subject: Re: [osg-users] how to get the real world coordinates(x, y,z) in
shader
ttaw wrote:
> I want to get world coordinates of vertices in shader. I used:
> osg_ViewMatrixInverse*(gl_ModelViewMatrix*vertex);
> But the result is wrong if the geode is a child of an HUD camera node
(emphasis mine)
What are the symptoms?
ttaw wrote:
> which is in the scenegraph.It seems that the uniform osg_ViewMatrixInverse is
> not for the HUD camera.
If this is that fact, you could create a custom mat4 in the shader and provide
the inverse ViewMatrix to it via an osg::Uniform.
Best regards,
S.
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=60113#60113
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
.
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
