Cell and Portal Alignment
cell is a node that allows the engine to render the area that
the player is in. A portal is a window that allows you to look
into the next area and is typically the next area that the
player is headed. You want to configure
the entrances and exits from one room to another in such a way
that no neighboring portal align in a straight vector.
The diagrams below represent
the areas assigned to cells as brown segments, the red lines
represent the portals, and the green line illustrates whether or
not your cell layout is properly configured.
In the first diagram, you can
see all the way from cell one to cell five, but the next two
diagrams show that you can not see cell four from cell one,
because the middle portals are out of alignment.
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