// build the moon object
ssgBranch * cGrMoon::build( double moon_size )
{
ssgDeRefDelete( moon_transform );
moon_transform = new ssgTransform;
moon_transform->ref();
moon_cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
moon_cl->add( color );
moon_state = new ssgSimpleState();
moon_state->setTexture( "data/textures/moon.rgba" );
moon_state->setShadeModel( GL_SMOOTH );
moon_state->enable( GL_LIGHTING );
moon_state->enable( GL_CULL_FACE );
moon_state->enable( GL_TEXTURE_2D );
moon_state->enable( GL_COLOR_MATERIAL );
moon_state->setColourMaterial( GL_DIFFUSE );
moon_state->setMaterial( GL_AMBIENT, 0, 0, 0, 1 );
moon_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
moon_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
moon_state->enable( GL_BLEND );
moon_state->enable( GL_ALPHA_TEST );
moon_state->setAlphaClamp( 0.01f );
ssgBranch *moon = grMakeSphere( moon_state, moon_cl, moon_size, 15, 15,
grMoonOrbPreDraw, grMoonOrbPostDraw );
moon_transform->addKid( moon );
repaint( 0.0 );
return moon_transform;
}
ssgBranch * cGrCelestialBody::build( ssgSimpleState *orb_state, ssgSimpleState *halo_state, double body_size )
{
ssgVertexArray *halo_vl;
ssgTexCoordArray *halo_tl;
// clean-up previous
ssgDeRefDelete( transform );
// build the ssg scene graph sub tree for the sky and connected
// into the provide scene graph branch
transform = new ssgTransform;
transform->ref();
cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
ssgBranch *orb = grMakeSphere( orb_state, cl, (float)body_size, 15, 15,
grCelestialBodyOrbPreDraw, grCelestialBodyOrbPostDraw );
transform->addKid( orb );
// force a repaint of the colors with arbitrary defaults
repaint( 0.0 );
if (halo_state)
{
// Build ssg structure
float size = float(body_size * 10.0);
sgVec3 v3;
halo_vl = new ssgVertexArray;
sgSetVec3( v3, -size, 0.0, -size );
halo_vl->add( v3 );
sgSetVec3( v3, size, 0.0, -size );
halo_vl->add( v3 );
sgSetVec3( v3, -size, 0.0, size );
halo_vl->add( v3 );
sgSetVec3( v3, size, 0.0, size );
halo_vl->add( v3 );
sgVec2 v2;
halo_tl = new ssgTexCoordArray;
sgSetVec2( v2, 0.0f, 0.0f );
halo_tl->add( v2 );
sgSetVec2( v2, 1.0, 0.0 );
halo_tl->add( v2 );
sgSetVec2( v2, 0.0, 1.0 );
halo_tl->add( v2 );
sgSetVec2( v2, 1.0, 1.0 );
halo_tl->add( v2 );
ssgLeaf *halo =
new ssgVtxTable ( GL_TRIANGLE_STRIP, halo_vl, NULL, halo_tl, cl );
halo->setState( halo_state );
halo->setCallback( SSG_CALLBACK_PREDRAW, grCelestialBodyHaloPreDraw );
halo->setCallback( SSG_CALLBACK_POSTDRAW, grCelestialBodyHaloPostDraw );
transform->addKid( halo );
//transform->addKid(new ssgaLensFlare);
}
return transform;
}
