Hi Robert,
I am now able to set an overall color for otherwise uncolored
geometries with your suggested fix. I still don't understand why this
is correct. I thought that the setStateSet would set a current color
from it's material which is now OSG seemed to behave until 2.9.3.
osg::Group *primary = gg.getPrimarySurface();
// This used to specify an overall color for otherwise uncolored geometries.
primary->setStateSet( _state.get() );
// Now required to set the overall color directly in the Geode.
// Uses the material associated with the state.
osg::Geode *gg = dynamic_cast<osg::Geode*>(primary->getChild(0));
if ( gg )
_applyColor( gg, _material->getDiffuse(osg::Material::FRONT_AND_BACK));
...
void Material::_applyColor( osg::Geode *gg, osg::Vec4 color )
{
osg::ref_ptr<osg::Geode> geode = gg;
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array( 1 );
(*colors)[ 0 ] = color;
for ( unsigned int ii=0; ii<geode->getNumDrawables(); ii++ )
{
osg::Geometry *geom = dynamic_cast<osg::Geometry*>(geode->getDrawable(
ii ));
geom->setColorArray( colors.get() );
geom->setColorBinding( osg::Geometry::BIND_OVERALL );
}
}
-Don
Robert Osfield wrote:
Hi Don,
On Tue, Sep 21, 2010 at 12:13 AM, Don Leich <[email protected]> wrote:
I confirmed that the bug persists in today's SVN trunk. In the example
already supplied the overall color is not applied when normals are
given as BIND_PER_PRIMITIVE.
I've just tested svn/trunk and 2.9.3 and can confirm that there is
different behaviour.
I've also isolated the two geometries that use BIND_PER_PRIMITIVE and
they just use this binding for normals, but have no colour array
assigned at all. So... they will be inheriting their colour from
other geometries in a completely undefined way.
This to me doesn't look like a bug at all, but an issue with a
under-defined scene graph, and just by luck it's worked before.
Please assign colours to all the geometries that need it and then
re-test.
Robert.
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