public PCZCamera( string name, SceneManager sceneManager )
: base( name, sceneManager )
{
this.box = new AxisAlignedBox( new Vector3( -0.1f, -0.1f, -0.1f ), new Vector3( 0.1f, 0.1f, 0.1f ) );
this.extraCullingFrustum = new PCZFrustum();
this.extraCullingFrustum.SetUseOriginPlane( true );
}
public PCZCamera(string name, SceneManager sceneManager)
: base(name, sceneManager)
{
this.box = new AxisAlignedBox(new Vector3(-0.1f, -0.1f, -0.1f), new Vector3(0.1f, 0.1f, 0.1f));
this.extraCullingFrustum = new PCZFrustum();
this.extraCullingFrustum.SetUseOriginPlane(true);
}
public void UpdateZones(PCZone defaultZone, ulong frameCount)
{
//update the zones this light affects
PCZone homeZone;
this.affectedZonesList.Clear();
this.affectsVisibleZone = false;
var sn = (PCZSceneNode)(ParentSceneNode);
if (null != sn)
{
// start with the zone the light is in
homeZone = sn.HomeZone;
if (null != homeZone)
{
this.affectedZonesList.Add(homeZone);
if (homeZone.LastVisibleFrame == frameCount)
{
this.affectsVisibleZone = true;
}
}
else
{
// error - scene node has no homezone!
// just say it affects the default zone and leave it at that.
this.affectedZonesList.Add(defaultZone);
if (defaultZone.LastVisibleFrame == frameCount)
{
this.affectsVisibleZone = true;
}
return;
}
}
else
{
// ERROR! not connected to a scene node,
// just say it affects the default zone and leave it at that.
this.affectedZonesList.Add(defaultZone);
if (defaultZone.LastVisibleFrame == frameCount)
{
this.affectsVisibleZone = true;
}
return;
}
// now check visibility of each portal in the home zone. If visible to
// the light then add the target zone of the portal to the list of
// affected zones and recurse into the target zone
var portalFrustum = new PCZFrustum();
Vector3 v = GetDerivedPosition();
portalFrustum.SetOrigin(v);
homeZone.CheckLightAgainstPortals(this, frameCount, portalFrustum, null);
}
/** (recursive) check the given light against all portals in the zone
* NOTE: This is the default implementation, which doesn't take advantage
* of any zone-specific optimizations for checking portal visibility
*/
public override void CheckLightAgainstPortals( PCZLight light, ulong frameCount, PCZFrustum portalFrustum, Portal ignorePortal )
{
foreach ( Portal p in mPortals )
{
//Portal * p = *it;
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;
}
}
}
}
}
/** (recursive) check the given light against all portals in the zone */ public abstract void CheckLightAgainstPortals( PCZLight light, ulong frameCount, PCZFrustum portalFrustum, Portal ignorePortal );
/** (recursive) check the given light against all portals in the zone
*/
public abstract void CheckLightAgainstPortals(PCZLight light, ulong frameCount, PCZFrustum portalFrustum,
Portal ignorePortal);
public void UpdateZones( PCZone defaultZone, ulong frameCount )
{
//update the zones this light affects
PCZone homeZone;
this.affectedZonesList.Clear();
this.affectsVisibleZone = false;
var sn = (PCZSceneNode)( ParentSceneNode );
if ( null != sn )
{
// start with the zone the light is in
homeZone = sn.HomeZone;
if ( null != homeZone )
{
this.affectedZonesList.Add( homeZone );
if ( homeZone.LastVisibleFrame == frameCount )
{
this.affectsVisibleZone = true;
}
}
else
{
// error - scene node has no homezone!
// just say it affects the default zone and leave it at that.
this.affectedZonesList.Add( defaultZone );
if ( defaultZone.LastVisibleFrame == frameCount )
{
this.affectsVisibleZone = true;
}
return;
}
}
else
{
// ERROR! not connected to a scene node,
// just say it affects the default zone and leave it at that.
this.affectedZonesList.Add( defaultZone );
if ( defaultZone.LastVisibleFrame == frameCount )
{
this.affectsVisibleZone = true;
}
return;
}
// now check visibility of each portal in the home zone. If visible to
// the light then add the target zone of the portal to the list of
// affected zones and recurse into the target zone
var portalFrustum = new PCZFrustum();
Vector3 v = GetDerivedPosition();
portalFrustum.SetOrigin( v );
homeZone.CheckLightAgainstPortals( this, frameCount, portalFrustum, null );
}
/** (recursive) check the given light against all portals in the zone
* NOTE: This is the default implementation, which doesn't take advantage
* of any zone-specific optimizations for checking portal visibility
*/
public override void CheckLightAgainstPortals(PCZLight light, ulong frameCount, PCZFrustum portalFrustum,
Portal ignorePortal)
{
foreach (Portal p in mPortals)
{
//Portal * p = *it;
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;
}
}
}
}
}
