[osg-users] BumpMapping osgFX problem

[Hugo Gomes]

Hello,

im having problems with the BumpMapping osgFX, somehow it just seems it
doesn't light the model. Model is only responding to ambient light. Is there
any quirck im forgetting of doing ?

The osgfxbrowser example works fine, so its not a hardware problem...

Here is the code for the light setup:

    osg::ref_ptr<osg::Light> light = new osg::Light;
    light->setLightNum( 0 );
    light->setDiffuse( osg::Vec4( 1, 1, 1, 1 ) );
    light->setSpecular( osg::Vec4( 1, 1, 0.8f, 1 ) );
    light->setAmbient( osg::Vec4( 0.2f, 0.2f, 0.2f, 0.2f ) );
    light->setPosition( osg::Vec4( 10, -1, 0, 0 ) );

    root = new osg::LightSource;
    root->setLight( light.get() );
    root->setLocalStateSetModes();


Here is the code for the bump mapping FX node:

void ScenePlanet::generatePlanet()
{
    PlanetRotateCallback* rotate_cb;
    osg::Geode* planet_geode = new osg::Geode();

    osg::StateSet* planet_stateset = planet_geode->getOrCreateStateSet();

// get the textures according to the position that they were inserted at
    osg::Texture2D* texture = textures->at(0);
    osg::Texture2D* normal_map = textures->at(1);
// set them up
    planet_stateset->setMode(GL_LIGHTING, osg::StateAttribute::ON);
    planet_stateset->setTextureAttributeAndModes( 0, texture,
osg::StateAttribute::ON );
    planet_stateset->setTextureAttributeAndModes( 1, normal_map,
osg::StateAttribute::ON );

    osg::TessellationHints* hints = new osg::TessellationHints;

    hints->setDetailRatio(0.5f);
    planet_geode->addDrawable(
            new osg::ShapeDrawable(
                new osg::Sphere( osg::Vec3( 0.0f,0.0f,0.0f ), 5.0f ) )
            );

// set up the effects of the model
    osgFX::BumpMapping* bump_fx = new osgFX::BumpMapping();
    bump_fx->setEnabled( true );
    bump_fx->addChild( planet_geode );
    bump_fx->setNormalMapTextureUnit(1);
    bump_fx->setDiffuseTextureUnit(0);
    bump_fx->setLightNumber(0);

    bump_fx->prepareChildren();
    //bump_fx->setUpDemo();

// set up a transform to rotate the model
    osg::ref_ptr<osg::PositionAttitudeTransform> xform =
                                                new
osg::PositionAttitudeTransform();
    xform->setPosition( osg::Vec3( 1.5, 0, 1 ) );
    xform->setPivotPoint( osg::Vec3( 0, 0, 0 ) );

    rotate_cb = new PlanetRotateCallback;
    xform->setUpdateCallback( rotate_cb );
    xform->addChild( bump_fx );

    root->addChild( xform.get() );
}

Here is the code for the texture generation:

Diffuse Texture:


    osg_img->setImage( size, size, 1,
                       4, GL_RGBA, GL_UNSIGNED_BYTE,
                       writer.GetImageData(),
                       osg::Image::USE_NEW_DELETE );
    texture->setImage(osg_img);
    texture->setFilter(osg::Texture::MIN_FILTER,
osg::Texture::LINEAR_MIPMAP_LINEAR);
    texture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR);
    texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
    texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
    texture->setMaxAnisotropy( 8 );

    textures->push_back( texture );



Normal Texture:


    osg_normalmap_img->setImage( size, size, 1,
                                 4, GL_RGBA, GL_UNSIGNED_BYTE,
                                 writer.GetImageData(),
                                 osg::Image::USE_NEW_DELETE );
    normalmap_texture->setImage(osg_normalmap_img);
    normalmap_texture->setFilter(osg::Texture::MIN_FILTER,
osg::Texture::LINEAR_MIPMAP_LINEAR);
    normalmap_texture->setFilter(osg::Texture::MAG_FILTER,
osg::Texture::LINEAR);
    normalmap_texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
    normalmap_texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
    normalmap_texture->setMaxAnisotropy(8);

    textures->push_back( normalmap_texture );

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