areaportal

type AreaPortal struct {
	// PortalKey - entities have a key called portal number (and in vbsp a variable called areaportalnum) to bind
	// them to the area portals by comparing this value
	PortalKey uint16
	// OtherArea is the area this portal looks into
	OtherArea uint16
	// FirstClipPortalVert Portal geometry
	FirstClipPortalVert uint16
	// NumClipPortalVerts number of geometry verts
	NumClipPortalVerts uint16
	// PlaneNum
	PlaneNum int32
}