[gl4java-usergroup] problems with selecting/picking objects

[<jen...@ag...>]

hi to all & a happy new year,

i have some troubles to get my picking&selecting routine working. to show
you the problem i have changed the "select"-demo form MiscDemos shipped with
the GL4Java demos.

the original Render method:

public void Render( int mode )
{
    int i;

    for(i=0; i < objectCount; i++)
    {
        if(mode == GL_SELECT )
        {
            gl.glLoadName(i);
        }
        // ... drawing object[i] ...
    }
}

so far so good, this works fine.
the changed method:

public void Render( int mode )
{
    int i;
    for( i=0; i < objectsCount; i++ )
    {
        if(mode == GL_SELECT )
        {
            gl.glPushName(i);
        }
        // ... drawing object[i];
        if( mode == GL_SELECT )
        {
            gl.glPopName();
        }
    }
}

and this won't work ( Java 1.4.0 & GL4Java 2.8.2.0 ). The glRenderMode(...)
correctly returns the number of hits ( 0|1) but the selectBuffer is empty
SOMETIMES ( while a hit is returned )! furthermore clicks ( random number )
on the same coordinates will mostly return 1 hit / selectBuffer empty but
also sometimes the correct values.
I deleted in this demo in method DoSelect(...) the gl.glPush(~0); and the
demo works fine but in my project the effect still remains.

any ideas ? thanks, Jens