Strange behavior of object and lamp during rotation

Greetings,

I love SIO2 by the way.

I have adapted Tutorial2, and have exported materials and also a lamp into the scene. Strangely, when the object is rotated in templateScreenTouchMove(), the model goes dark when rotated 180 degrees. It seems to be maybe a matrix problem.

Whats the best way to deal with this?


Thanks!! Kind regards,
-joshua

Please take a look at tutorial08 for how to use lighting in SIO2.

Hey :-)

If you replace the code in Tutorial02 with this:


// Enable GL_LIGTHING and setup the necessary
// state variables to render our objects with
// lights & materials applied.
sio2LampEnableLight();
{
sio2ResourceRender( sio2->_SIO2resource,
sio2->_SIO2window,
sio2->_SIO2camera );

SIO2object *_SIO2object = sio2ResourceGetObject( sio2->_SIO2resource,
"object/Sphere" );

_SIO2object->rot->z += 1.0f;
sio2ObjectBindMatrix( _SIO2object );

}
// Turn OFF the lights.
sio2LampResetLight();



You will see the problem I am talking about.

Thanks!!!!
-joshua

But there is no light exported in tutorial02... What you are seeing is default lighting value of GL when lighting is ON... make sure you export some lights...

I did.

If you put this lamp in the scene you will see what I mean:

lamp( "lamp/Lamp")
{
pos( 4.076 1.005 5.904 )
dir( 0 0 -1 )
col( 1 1 1 )
nrg( 0.5 )
dst( 30.0 )
fov( 75 )
sblend( 0.15 )
att1( 0 )
att2( 1 )
}

Ok, the answer to this problem is that I wasn't exporting normals =/


Thanks!!!
-joshua