01 SoSeparator* drawEarth()
02 {
03    // Objects for group nodes and texture
04    SoSeparator *earth = new SoSeparator;
05    SoTexture2  *texture_earth = new SoTexture2;
06 
07    // Name of texture file
08    texture_earth->filename = "worldmap.rgb";
09 
10    // Add texture to group node
11    earth->addChild(texture_earth);
12 
13    // Add sphere to group node 
14    // => Draw texture on surface of sphere
15    earth->addChild(new SoSphere);
16 
17    return earth;
18 }