the delay at the doorways in metroid prime is not a complex portal system, it's just a delay to load the next section. the portal stuff (or deciding what part has to be rendered) happens in real time.
but that's a tad off topic.
a good way to see how portals work is to run quake or half life or any quake engine based games and turn the wireframe view on (in quake3 it something like "/r_showtris 1" in the command line after you enabled the cheats with "/sv_cheats 1").
hope that helps.
but that's a tad off topic.
a good way to see how portals work is to run quake or half life or any quake engine based games and turn the wireframe view on (in quake3 it something like "/r_showtris 1" in the command line after you enabled the cheats with "/sv_cheats 1").
hope that helps.