public override void UpdatePortalsZoneData()
{
var transferPortalList = new List <Portal>();
// check each portal to see if it's intersecting another portal of greater size
foreach (Portal p in mPortals)
{
Real pRadius = p.getRadius();
// First we check against portals in the SAME zone (and only if they have a
// target zone different from the home zone)
foreach (Portal p2 in mPortals)
{
// only check against bigger portals (this will also prevent checking against self)
// and only against portals which point to another zone
if (pRadius < p2.getRadius() && p2.getTargetZone() != this)
{
// Portal#2 is bigger than Portal1, check for crossing
if (p.crossedPortal(p2))
{
// portal#1 crossed portal#2 - flag portal#1 to be moved to portal#2's target zone
p.setNewHomeZone(p2.getTargetZone());
transferPortalList.Add(p);
break;
}
}
}
// Second we check against portals in the target zone (and only if that target
// zone is different from the home zone)
PCZone tzone = p.getTargetZone();
if (tzone != this)
{
foreach (Portal p3 in mPortals)
{
// only check against bigger portals
if (pRadius < p3.getRadius())
{
// Portal#3 is bigger than Portal#1, check for crossing
if (p.crossedPortal(p3) && p.getCurrentHomeZone() != p3.getTargetZone())
{
// Portal#1 crossed Portal#3 - switch target zones for Portal#1
p.setTargetZone(p3.getTargetZone());
break;
}
}
}
}
}
// transfer any portals to new zones that have been flagged
foreach (Portal p in transferPortalList)
{
if (null != p.getNewHomeZone())
{
RemovePortal(p);
p.getNewHomeZone().AddPortal(p);
p.setNewHomeZone(null);
}
}
transferPortalList.Clear();
}
public override PCZone UpdateNodeHomeZone(PCZSceneNode pczsn, bool allowBackTouches)
{
// default to newHomeZone being the current home zone
PCZone newHomeZone = pczsn.HomeZone;
// Check all portals of the start zone for crossings!
foreach (Portal portal in mPortals)
{
PortalIntersectResult pir = portal.intersects(pczsn);
switch (pir)
{
default:
case PortalIntersectResult.NO_INTERSECT: // node does not intersect portal - do nothing
case PortalIntersectResult.INTERSECT_NO_CROSS:
// node intersects but does not cross portal - do nothing
break;
case PortalIntersectResult.INTERSECT_BACK_NO_CROSS: // node intersects but on the back of the portal
if (allowBackTouches)
{
// node is on wrong side of the portal - fix if we're allowing backside touches
if (portal.getTargetZone() != this && portal.getTargetZone() != pczsn.HomeZone)
{
// set the home zone of the node to the target zone of the portal
pczsn.HomeZone = portal.getTargetZone();
// continue checking for portal crossings in the new zone
newHomeZone = portal.getTargetZone().UpdateNodeHomeZone(pczsn, false);
}
}
break;
case PortalIntersectResult.INTERSECT_CROSS:
// node intersects and crosses the portal - recurse into that zone as new home zone
if (portal.getTargetZone() != this && portal.getTargetZone() != pczsn.HomeZone)
{
// set the home zone of the node to the target zone of the portal
pczsn.HomeZone = portal.getTargetZone();
// continue checking for portal crossings in the new zone
newHomeZone = portal.getTargetZone().UpdateNodeHomeZone(pczsn, true);
}
break;
}
}
// return the new home zone
return(newHomeZone);
}
public Octree(PCZone zone, Octree parent)
{
this.wireBoundingBox = null;
HalfSize = new Vector3();
this.parent = parent;
NunodeList = 0;
this.zone = zone;
//initialize all children to null.
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
for (int k = 0; k < 2; k++)
{
this.Children[i, j, k] = null;
}
}
}
}
public OctreeZoneData(PCZSceneNode node, PCZone zone)
: base(node, zone)
{
this.mOctant = null;
this.mOctreeWorldAABB = AxisAlignedBox.Null;
}
public override void CheckLightAgainstPortals(PCZLight light, ulong frameCount, PCZFrustum portalFrustum,
Portal ignorePortal)
{
foreach (Portal p in mPortals)
{
if (p != ignorePortal)
{
// calculate the direction vector from light to portal
Vector3 lightToPortal = p.getDerivedCP() - light.GetDerivedPosition();
if (portalFrustum.IsObjectVisible(p))
{
// portal is facing the light, but some light types need to
// check illumination radius too.
PCZone targetZone = p.getTargetZone();
switch (light.Type)
{
case LightType.Point:
// point lights - just check if within illumination range
if (lightToPortal.Length <= light.AttenuationRange)
{
// if portal is quad portal it must be pointing towards the light
if ((p.Type == PORTAL_TYPE.PORTAL_TYPE_QUAD && lightToPortal.Dot(p.getDerivedDirection()) < 0.0) ||
(p.Type != PORTAL_TYPE.PORTAL_TYPE_QUAD))
{
if (!light.AffectsZone(targetZone))
{
light.AddZoneToAffectedZonesList(targetZone);
if (targetZone.LastVisibleFrame == frameCount)
{
light.AffectsVisibleZone = true;
}
// set culling frustum from the portal
portalFrustum.AddPortalCullingPlanes(p);
// recurse into the target zone of the portal
p.getTargetZone().CheckLightAgainstPortals(light, frameCount, portalFrustum, p.getTargetPortal());
// remove the planes added by this portal
portalFrustum.RemovePortalCullingPlanes(p);
}
}
}
break;
case LightType.Directional:
// directionals have infinite range, so just make sure
// the direction is facing the portal
if (lightToPortal.Dot(light.DerivedDirection) >= 0.0)
{
// if portal is quad portal it must be pointing towards the light
if ((p.Type == PORTAL_TYPE.PORTAL_TYPE_QUAD && lightToPortal.Dot(p.getDerivedDirection()) < 0.0) ||
(p.Type != PORTAL_TYPE.PORTAL_TYPE_QUAD))
{
if (!light.AffectsZone(targetZone))
{
light.AddZoneToAffectedZonesList(targetZone);
if (targetZone.LastVisibleFrame == frameCount)
{
light.AffectsVisibleZone = true;
}
// set culling frustum from the portal
portalFrustum.AddPortalCullingPlanes(p);
// recurse into the target zone of the portal
p.getTargetZone().CheckLightAgainstPortals(light, frameCount, portalFrustum, p.getTargetPortal());
// remove the planes added by this portal
portalFrustum.RemovePortalCullingPlanes(p);
}
}
}
break;
case LightType.Spotlight:
// spotlights - just check if within illumination range
// Technically, we should check if the portal is within
// the cone of illumination, but for now, we'll leave that
// as a future optimisation.
if (lightToPortal.Length <= light.AttenuationRange)
{
// if portal is quad portal it must be pointing towards the light
if ((p.Type == PORTAL_TYPE.PORTAL_TYPE_QUAD && lightToPortal.Dot(p.getDerivedDirection()) < 0.0) ||
(p.Type != PORTAL_TYPE.PORTAL_TYPE_QUAD))
{
if (!light.AffectsZone(targetZone))
{
light.AddZoneToAffectedZonesList(targetZone);
if (targetZone.LastVisibleFrame == frameCount)
{
light.AffectsVisibleZone = true;
}
// set culling frustum from the portal
portalFrustum.AddPortalCullingPlanes(p);
// recurse into the target zone of the portal
p.getTargetZone().CheckLightAgainstPortals(light, frameCount, portalFrustum, p.getTargetPortal());
// remove the planes added by this portal
portalFrustum.RemovePortalCullingPlanes(p);
}
}
}
break;
}
}
}
}
}
