public void Merge( AxisAlignedBox boxBounds, Sphere sphereBounds, Camera cam, bool receiver )
{
aabb.Merge( boxBounds );
if ( receiver )
receiverAabb.Merge( boxBounds );
Real camDistToCenter = ( cam.DerivedPosition - sphereBounds.Center ).Length;
minDistance = System.Math.Min( minDistance, System.Math.Max( (Real)0, camDistToCenter - sphereBounds.Radius ) );
maxDistance = System.Math.Max( maxDistance, camDistToCenter + sphereBounds.Radius );
}
/// <summary>
/// Creates a <see cref="SphereRegionSceneQuery"/> for this scene manager.
/// </summary>
/// <remarks>
/// This method creates a new instance of a query object for this scene manager,
/// for querying for objects within a spherical region.
/// </remarks>
/// <param name="sphere">Sphere to use for the region query.</param>
/// <param name="mask">Custom user defined flags to use for the query.</param>
/// <returns>A specialized implementation of SphereRegionSceneQuery for this scene manager.</returns>
public virtual SphereRegionSceneQuery CreateSphereRegionQuery( Sphere sphere, uint mask )
{
DefaultSphereRegionSceneQuery query = new DefaultSphereRegionSceneQuery( this );
query.Sphere = sphere;
query.QueryMask = mask;
return query;
}
/// <summary>
/// Internal method for rendering all the objects for a given light into the stencil buffer.
/// </summary>
/// <param name="light">The light source.</param>
/// <param name="camera">The camera being viewed from.</param>
protected virtual void RenderShadowVolumesToStencil( Light light, Camera camera )
{
// get the shadow caster list
IList casters = this.FindShadowCastersForLight( light, camera );
if ( casters.Count == 0 )
{
// No casters, just do nothing
return;
}
// Set up scissor test (point & spot lights only)
bool scissored = false;
if ( light.Type != LightType.Directional &&
this.targetRenderSystem.Capabilities.HasCapability( Capabilities.ScissorTest ) )
{
// Project the sphere onto the camera
float left, right, top, bottom;
Sphere sphere = new Sphere( light.DerivedPosition, light.AttenuationRange );
if ( camera.ProjectSphere( sphere, out left, out top, out right, out bottom ) )
{
scissored = true;
// Turn normalised device coordinates into pixels
int iLeft, iTop, iWidth, iHeight;
this.currentViewport.GetActualDimensions( out iLeft, out iTop, out iWidth, out iHeight );
int szLeft, szRight, szTop, szBottom;
szLeft = (int)( iLeft + ( ( left + 1 ) * 0.5f * iWidth ) );
szRight = (int)( iLeft + ( ( right + 1 ) * 0.5f * iWidth ) );
szTop = (int)( iTop + ( ( -top + 1 ) * 0.5f * iHeight ) );
szBottom = (int)( iTop + ( ( -bottom + 1 ) * 0.5f * iHeight ) );
this.targetRenderSystem.SetScissorTest( true, szLeft, szTop, szRight, szBottom );
}
}
this.targetRenderSystem.UnbindGpuProgram( GpuProgramType.Fragment );
// Can we do a 2-sided stencil?
bool stencil2sided = false;
if ( this.targetRenderSystem.Capabilities.HasCapability( Capabilities.TwoSidedStencil ) &&
this.targetRenderSystem.Capabilities.HasCapability( Capabilities.StencilWrap ) )
{
// enable
stencil2sided = true;
}
// Do we have access to vertex programs?
bool extrudeInSoftware = true;
bool finiteExtrude = !this.shadowUseInfiniteFarPlane ||
!this.targetRenderSystem.Capabilities.HasCapability(
Capabilities.InfiniteFarPlane );
if ( this.targetRenderSystem.Capabilities.HasCapability( Capabilities.VertexPrograms ) )
{
extrudeInSoftware = false;
this.EnableHardwareShadowExtrusion( light, finiteExtrude );
}
else
{
this.targetRenderSystem.UnbindGpuProgram( GpuProgramType.Vertex );
}
// Add light to internal list for use in render call
tmpLightList.Clear();
tmpLightList.Add( light );
// Turn off color writing and depth writing
this.targetRenderSystem.SetColorBufferWriteEnabled( false, false, false, false );
this.targetRenderSystem.DepthBufferWriteEnabled = false;
this.targetRenderSystem.StencilCheckEnabled = true;
this.targetRenderSystem.DepthBufferFunction = CompareFunction.Less;
// Calculate extrusion distance
float extrudeDistance = 0;
if ( light.Type == LightType.Directional )
{
extrudeDistance = this.shadowDirLightExtrudeDist;
}
// get the near clip volume
PlaneBoundedVolume nearClipVol = light.GetNearClipVolume( camera );
// Determine whether zfail is required
// We need to use zfail for ALL objects if we find a single object which
// requires it
bool zfailAlgo = false;
this.CheckShadowCasters( casters,
nearClipVol,
light,
extrudeInSoftware,
finiteExtrude,
zfailAlgo,
camera,
extrudeDistance,
stencil2sided,
tmpLightList );
// revert colour write state
this.targetRenderSystem.SetColorBufferWriteEnabled( true, true, true, true );
// revert depth state
this.targetRenderSystem.SetDepthBufferParams();
this.targetRenderSystem.StencilCheckEnabled = false;
this.targetRenderSystem.UnbindGpuProgram( GpuProgramType.Vertex );
if ( scissored )
{
// disable scissor test
this.targetRenderSystem.SetScissorTest( false );
}
}
/// <summary>
/// Internal method for locating a list of lights which could be affecting the frustum.
/// </summary>
/// <remarks>
/// Custom scene managers are encouraged to override this method to make use of their
/// scene partitioning scheme to more efficiently locate lights, and to eliminate lights
/// which may be occluded by word geometry.
/// </remarks>
/// <param name="camera">Camera to find lights within it's view.</param>
protected virtual void FindLightsAffectingFrustum( Camera camera )
{
// Basic iteration for this scene manager
this.lightsAffectingFrustum.Clear();
MovableObjectCollection lightList = this.GetMovableObjectCollection( LightFactory.TypeName );
// sphere to use for testing
Sphere sphere = new Sphere();
foreach ( Light light in lightList.Values )
{
if ( light.IsVisible )
{
if ( light.Type == LightType.Directional )
{
// Always visible
this.lightsAffectingFrustum.Add( light );
}
else
{
// treating spotlight as point for simplicity
// Just see if the lights attenuation range is within the frustum
sphere.Center = light.DerivedPosition;
sphere.Radius = light.AttenuationRange;
if ( camera.IsObjectVisible( sphere ) )
{
this.lightsAffectingFrustum.Add( light );
}
}
}
}
// notify light dirty, so all movable objects will re-populate
// their light list next time
NotifyLightsDirty();
}
public abstract void FindNodes( Sphere t, ref List<PCZSceneNode> nodes, List<Portal> portals, bool includeVisitors, bool recurseThruPortals, PCZSceneNode exclude );
public void FindNodes( Sphere sphere, SceneNodeCollection sceneNodeList, SceneNode exclude, bool full, Octree octant )
{
//TODO: Implement
}
/// <summary>
/// Tests whether this box intersects a sphere.
/// </summary>
/// <param name="sphere"></param>
/// <returns>True if the sphere intersects, false otherwise.</returns>
public bool Intersects( Sphere sphere )
{
return Utility.Intersects( sphere, this );
}
public void Merge( AxisAlignedBox boxBounds, Sphere sphereBounds, Camera cam )
{
Merge( boxBounds, sphereBounds, cam, true );
}
/// <summary>
/// Intersection test with <see cref="Sphere"/>.
/// </summary>
/// <param name="sphere">Sphere to test.</param>
/// <returns>True if the sphere intersects this volume, and false otherwise.</returns>
public bool Intersects( Sphere sphere )
{
for ( int i = 0; i < planes.Count; i++ )
{
Plane plane = (Plane)planes[ i ];
// Test which side of the plane the sphere is
Real d = plane.GetDistance( sphere.Center );
// Negate d if planes point inwards
if ( outside == PlaneSide.Negative )
{
d = -d;
}
if ( ( d - sphere.Radius ) > 0 )
{
return false;
}
}
// assume intersecting
return true;
}
//---------------------------------------------------------------------
protected override void FindLightsAffectingFrustum( Camera camera )
{
base.FindLightsAffectingFrustum( camera );
return;
// Similar to the basic SceneManager, we iterate through
// lights to see which ones affect the frustum. However,
// since we have camera & lights partitioned by zones,
// we can check only those lights which either affect the
// zone the camera is in, or affect zones which are visible to
// the camera
MovableObjectCollection lights = GetMovableObjectCollection( PCZLightFactory.TypeName );
lock ( lights )
{
foreach ( PCZLight l in lights.Values )
{
if ( l.IsVisible /* && l.AffectsVisibleZone */ )
{
LightInfo lightInfo;
lightInfo.light = l;
lightInfo.type = (int)l.Type;
if ( lightInfo.type == (int)LightType.Directional )
{
// Always visible
lightInfo.position = Vector3.Zero;
lightInfo.range = 0;
this.mTestLightInfos.Add( lightInfo );
}
else
{
// NB treating spotlight as point for simplicity
// Just see if the lights attenuation range is within the frustum
lightInfo.range = l.AttenuationRange;
lightInfo.position = l.GetDerivedPosition();
var sphere = new Sphere( lightInfo.position, lightInfo.range );
if ( camera.IsObjectVisible( sphere ) )
{
this.mTestLightInfos.Add( lightInfo );
}
}
}
}
} // release lock on lights collection
base.FindLightsAffectingFrustum( camera );
// from here on down this function is same as Ogre::SceneManager
// Update lights affecting frustum if changed
if ( this.mCachedLightInfos != this.mTestLightInfos )
{
//mLightsAffectingFrustum.resize(mTestLightInfos.size());
//LightInfoList::const_iterator i;
//LightList::iterator j = mLightsAffectingFrustum.begin();
//for (i = mTestLightInfos.begin(); i != mTestLightInfos.end(); ++i, ++j)
//{
// *j = i->light;
// // add cam distance for sorting if texture shadows
// if (isShadowTechniqueTextureBased())
// {
// (*j)->tempSquareDist =
// (camera->getDerivedPosition() - (*j)->getDerivedPosition()).squaredLength();
// }
//}
foreach ( LightInfo i in this.mTestLightInfos )
{
if ( IsShadowTechniqueTextureBased )
{
i.light.TempSquaredDist = ( camera.DerivedPosition - i.light.GetDerivedPosition() ).LengthSquared;
}
}
if ( IsShadowTechniqueTextureBased )
{
}
// Sort the lights if using texture shadows, since the first 'n' will be
// used to generate shadow textures and we should pick the most appropriate
//if (IsShadowTechniqueTextureBased)
//{
// // Allow a ShadowListener to override light sorting
// // Reverse iterate so last takes precedence
// bool overridden = false;
// foreach(object o in base.)
// for (ListenerList::reverse_iterator ri = mListeners.rbegin();
// ri != mListeners.rend(); ++ri)
// {
// overridden = (*ri)->sortLightsAffectingFrustum(mLightsAffectingFrustum);
// if (overridden)
// break;
// }
// if (!overridden)
// {
// // default sort (stable to preserve directional light ordering
// std::stable_sort(
// mLightsAffectingFrustum.begin(), mLightsAffectingFrustum.end(),
// lightsForShadowTextureLess());
// }
//}
// Use swap instead of copy operator for efficiently
//mCachedLightInfos.swap(mTestLightInfos);
this.mCachedLightInfos = this.mTestLightInfos;
// notify light dirty, so all movable objects will re-populate
// their light list next time
//_notifyLightsDirty();
//Check: do we have something like this here?
}
}
public void FindNodesIn( Sphere sphere, ref List<PCZSceneNode> list, PCZone startZone, PCZSceneNode exclude )
{
var visitedPortals = new List<Portal>();
if ( null != startZone )
{
// start in startzone, and recurse through portals if necessary
startZone.FindNodes( sphere, ref list, visitedPortals, true, true, exclude );
}
else
{
// no start zone specified, so check all zones
foreach ( PCZone zone in this.zones )
{
zone.FindNodes( sphere, ref list, visitedPortals, false, false, exclude );
}
}
}
/// <summary>
/// Tests whether this ray intersects the given sphere.
/// </summary>
/// <param name="sphere"></param>
/// <returns>
/// Struct containing info on whether there was a hit, and the distance from the
/// origin of this ray where the intersect happened.
/// </returns>
public IntersectResult Intersects( Sphere sphere )
{
return Utility.Intersects( this, sphere );
}
/// <summary>
/// /
/// </summary>
/// <param name="sphere"></param>
/// <param name="terrainList"></param>
public void SphereIntersects(Sphere sphere, out List<Terrain> terrainList)
{
terrainList = new List<Terrain>();
foreach (TerrainSlot i in _terrainSlots.Values)
{
if (i.Instance != null && sphere.Intersects(i.Instance.WorldAABB))
terrainList.Add(i.Instance);
}
}
public virtual bool ProjectSphere( Sphere sphere, out float left, out float top, out float right, out float bottom )
{
// initialise
left = bottom = -1.0f;
right = top = 1.0f;
// Transform light position into camera space
var eyeSpacePos = ViewMatrix.TransformAffine( sphere.Center );
if ( eyeSpacePos.z < 0 )
{
float r = sphere.Radius;
// early-exit
if ( eyeSpacePos.LengthSquared <= r*r )
{
return false;
}
var screenSpacePos = ProjectionMatrix*eyeSpacePos;
// perspective attenuate
var spheresize = new Vector3( r, r, eyeSpacePos.z );
spheresize = ProjectionMatrixRSDepth*spheresize;
float possLeft = screenSpacePos.x - spheresize.x;
float possRight = screenSpacePos.x + spheresize.x;
float possTop = screenSpacePos.y + spheresize.y;
float possBottom = screenSpacePos.y - spheresize.y;
left = Utility.Max( -1.0f, possLeft );
right = Utility.Min( 1.0f, possRight );
top = Utility.Min( 1.0f, possTop );
bottom = Utility.Max( -1.0f, possBottom );
}
return ( left != -1.0f ) || ( top != 1.0f ) || ( right != 1.0f ) || ( bottom != -1.0f );
}
/// <summary>
/// Tests whether the given sphere is in the viewing frustum.
/// </summary>
/// <param name="sphere">Bounding sphere to be checked.</param>
/// <param name="culledBy">
/// Optional FrustrumPlane params which will be filled by the plane which culled
/// the box if the result was false.
/// </param>
/// <returns>True if the box is visible, otherwise false.</returns>
public bool IsObjectVisible( Sphere sphere, out FrustumPlane culledBy )
{
// Make any pending updates to the calculated frustum
UpdateFrustumPlanes();
// For each plane, see if sphere is on negative side
// If so, object is not visible
for ( var plane = 0; plane < 6; plane++ )
{
if ( this._farDistance == 0 && plane == (int)FrustumPlane.Far )
{
continue;
}
// If the distance from sphere center to plane is negative, and 'more negative'
// than the radius of the sphere, sphere is outside frustum
if ( this._planes[ plane ].GetDistance( sphere.Center ) < -sphere.Radius )
{
// ALL corners on negative side therefore out of view
culledBy = (FrustumPlane)plane;
return false;
}
}
// sphere is not culled
culledBy = FrustumPlane.None;
return true;
}
/// <summary>
/// Tests for intersection between this sphere and another sphere.
/// </summary>
/// <param name="sphere">Other sphere.</param>
/// <returns>True if the spheres intersect, false otherwise.</returns>
public bool Intersects(Sphere sphere)
{
return((sphere.center - this.center).Length <= (sphere.radius + this.radius));
}
public override bool ProjectSphere( Sphere sphere, out float left, out float top, out float right, out float bottom )
{
if ( null != CullFrustum )
{
return CullFrustum.ProjectSphere( sphere, out left, out top, out right, out bottom );
}
//else
{
return base.ProjectSphere( sphere, out left, out top, out right, out bottom );
}
}
public override void FindNodes( Sphere t, ref List<PCZSceneNode> list, List<Portal> visitedPortals, bool includeVisitors, bool recurseThruPortals, PCZSceneNode exclude )
{
// if this zone has an enclosure, check against the enclosure AABB first
if ( null != mEnclosureNode )
{
if ( !mEnclosureNode.WorldAABB.Intersects( t ) )
{
// AABB of zone does not intersect t, just return.
return;
}
}
// use the Octree to more efficiently find nodes intersecting the sphere
rootOctree._findNodes( t, ref list, exclude, includeVisitors, false );
// if asked to, recurse through portals
if ( recurseThruPortals )
{
foreach ( Portal portal in mPortals )
{
// check portal versus boundign box
if ( portal.intersects( t ) )
{
// make sure portal hasn't already been recursed through
if ( !visitedPortals.Contains( portal ) )
{
// save portal to the visitedPortals list
visitedPortals.Add( portal );
// recurse into the connected zone
portal.getTargetZone().FindNodes( t,
ref list,
visitedPortals,
includeVisitors,
recurseThruPortals,
exclude );
}
}
}
}
}
public override bool FrameRenderingQueued( FrameEventArgs evt )
{
if ( this.mode != Mode.Normal )
{
// fire ray
Ray ray;
ray = TrayManager.GetCursorRay( Camera );
var rayResult = this.terrainGroup.RayIntersects( ray );
if ( rayResult.Hit )
{
this.editMarker.IsVisible = true;
this.editNode.Position = rayResult.Position;
// figure out which terrains this affects
List<Axiom.Components.Terrain.Terrain> terrainList;
var brushSizeWorldSpace = TerrainWorldSize*this.brushSizeTerrainSpace;
var sphere = new Sphere( rayResult.Position, brushSizeWorldSpace );
this.terrainGroup.SphereIntersects( sphere, out terrainList );
foreach ( var ti in terrainList )
{
DoTerrainModify( ti, rayResult.Position, evt.TimeSinceLastFrame );
}
}
else
{
this.editMarker.IsVisible = false;
}
}
if ( !this.fly )
{
// clamp to terrain
var camPos = Camera.Position;
var ray = new Ray( new Vector3( camPos.x, this.terrainPos.y + 10000, camPos.z ), Vector3.NegativeUnitY );
TerrainGroup.RayResult rayResult = this.terrainGroup.RayIntersects( ray );
Real distanceAboveTerrain = 50;
Real fallSpeed = 300;
Real newy = camPos.y;
if ( rayResult.Hit )
{
if ( camPos.y > rayResult.Position.y + distanceAboveTerrain )
{
this.fallVelocity += evt.TimeSinceLastFrame*20;
this.fallVelocity = Utility.Min( this.fallVelocity, fallSpeed );
newy = camPos.y - this.fallVelocity*evt.TimeSinceLastFrame;
}
newy = Utility.Max( rayResult.Position.y + distanceAboveTerrain, newy );
Camera.Position = new Vector3( camPos.x, newy, camPos.z );
}
}
if ( this.heightUpdateCountDown > 0 )
{
this.heightUpdateCountDown -= evt.TimeSinceLastFrame;
if ( this.heightUpdateCountDown <= 0 )
{
this.terrainGroup.Update();
this.heightUpdateCountDown = 0;
}
}
if ( this.terrainGroup.IsDerivedDataUpdateInProgress )
{
TrayManager.MoveWidgetToTray( this.infoLabel, TrayLocation.Top, 0 );
this.infoLabel.Show();
if ( this.terrainsImported )
{
this.infoLabel.Caption = "Building terrain, please wait...";
}
else
{
this.infoLabel.Caption = "Updating textures, patience...";
}
}
else
{
TrayManager.RemoveWidgetFromTray( this.infoLabel );
this.infoLabel.Hide();
if ( this.terrainsImported )
{
SaveTerrains( true );
this.terrainsImported = false;
}
}
return base.FrameRenderingQueued( evt );
}
/// <summary>
/// Tests for intersection between this sphere and another sphere.
/// </summary>
/// <param name="sphere">Other sphere.</param>
/// <returns>True if the spheres intersect, false otherwise.</returns>
public bool Intersects( Sphere sphere )
{
return ( ( sphere.center - this.center ).Length <= ( sphere.radius + this.radius ) );
}
public Intersection Intersect( Sphere sphere, AxisAlignedBox box )
{
intersect++;
float Radius = sphere.Radius;
Vector3 Center = sphere.Center;
Vector3[] Corners = box.Corners;
float s = 0;
float d = 0;
int i;
bool Partial;
Radius *= Radius;
Vector3 MinDistance = ( Corners[ 0 ] - Center );
Vector3 MaxDistance = ( Corners[ 4 ] - Center );
if ( ( MinDistance.LengthSquared < Radius ) && ( MaxDistance.LengthSquared < Radius ) )
{
return Intersection.Inside;
}
//find the square of the distance
//from the sphere to the box
for ( i = 0; i < 3; i++ )
{
if ( Center[ i ] < Corners[ 0 ][ i ] )
{
s = Center[ i ] - Corners[ 0 ][ i ];
d += s * s;
}
else if ( Center[ i ] > Corners[ 4 ][ i ] )
{
s = Center[ i ] - Corners[ 4 ][ i ];
d += s * s;
}
}
Partial = ( d <= Radius );
if ( !Partial )
{
return Intersection.Outside;
}
else
{
return Intersection.Intersect;
}
}
/** Checks how the box intersects with the sphere.
*/
private static Intersection intersect( Sphere one, AxisAlignedBox two )
{
// Null box?
if ( two.IsNull )
{
return Intersection.OUTSIDE;
}
if ( two.IsInfinite )
{
return Intersection.INTERSECT;
}
float sradius = one.Radius;
sradius *= sradius;
Vector3 scenter = one.Center;
Vector3 twoMin = two.Minimum;
Vector3 twoMax = two.Maximum;
float s, d = 0;
Vector3 mndistance = ( twoMin - scenter );
Vector3 mxdistance = ( twoMax - scenter );
if ( mndistance.LengthSquared < sradius && mxdistance.LengthSquared < sradius )
{
return Intersection.INSIDE;
}
//find the square of the distance
//from the sphere to the box
for ( int i = 0; i < 3; i++ )
{
if ( scenter[ i ] < twoMin[ i ] )
{
s = scenter[ i ] - twoMin[ i ];
d += s*s;
}
else if ( scenter[ i ] > twoMax[ i ] )
{
s = scenter[ i ] - twoMax[ i ];
d += s*s;
}
}
bool partial = ( d <= sradius );
if ( !partial )
{
return Intersection.OUTSIDE;
}
else
{
return Intersection.INTERSECT;
}
}
// TODO: Scene queries.
/// <summary>
/// Creates an AxisAlignedBoxSceneQuery for this scene manager.
/// </summary>
/// <remarks>
/// This method creates a new instance of a query object for this scene manager,
/// for an axis aligned box region. See SceneQuery and AxisAlignedBoxSceneQuery
/// for full details.
/// <p/>
/// The instance returned from this method must be destroyed by calling
/// SceneManager.DestroyQuery when it is no longer required.
/// </remarks>
/// <param name="box">Details of the box which describes the region for this query.</param>
/*public virtual AxisAlignedBoxSceneQuery CreateAABBQuery(AxisAlignedBox box)
{
return CreateAABBQuery(box, 0xFFFFFFFF);
}
/// <summary>
/// Creates an AxisAlignedBoxSceneQuery for this scene manager.
/// </summary>
/// <remarks>
/// This method creates a new instance of a query object for this scene manager,
/// for an axis aligned box region. See SceneQuery and AxisAlignedBoxSceneQuery
/// for full details.
/// <p/>
/// The instance returned from this method must be destroyed by calling
/// SceneManager.DestroyQuery when it is no longer required.
/// </remarks>
/// <param name="box">Details of the box which describes the region for this query.</param>
/// <param name="mask">The query mask to apply to this query; can be used to filter out certain objects; see SceneQuery for details.</param>
public virtual AxisAlignedBoxSceneQuery CreateAABBQuery(AxisAlignedBox box, ulong mask)
{
// TODO:
return null;
}*/
/// <summary>
/// Creates a SphereSceneQuery for this scene manager.
/// </summary>
/// <remarks>
/// This method creates a new instance of a query object for this scene manager,
/// for a spherical region. See SceneQuery and SphereSceneQuery
/// for full details.
/// </remarks>
/// <param name="sphere">Details of the sphere which describes the region for this query.</param>
/// <param name="mask">The query mask to apply to this query; can be used to filter out certain objects; see SceneQuery for details.</param>
public override SphereRegionSceneQuery CreateSphereRegionQuery( Sphere sphere, uint mask )
{
var q = new BspSphereRegionSceneQuery( this );
q.Sphere = sphere;
q.QueryMask = mask;
return q;
}
public void _findNodes( Sphere t, ref List<PCZSceneNode> list, PCZSceneNode exclude, bool includeVisitors, bool full )
{
if ( !full )
{
AxisAlignedBox obox;
_getCullBounds( out obox );
Intersection isect = intersect( t, obox );
if ( isect == Intersection.OUTSIDE )
{
return;
}
full = ( isect == Intersection.INSIDE );
}
foreach ( PCZSceneNode on in this.nodeList.Values )
{
if ( on != exclude && ( on.HomeZone == this.zone || includeVisitors ) )
{
if ( full )
{
// make sure the node isn't already on the list
list.Add( on );
}
else
{
Intersection nsect = intersect( t, on.WorldAABB );
if ( nsect != Intersection.OUTSIDE )
{
// make sure the node isn't already on the list
list.Add( on );
}
}
}
}
Octree child;
if ( ( child = this.Children[ 0, 0, 0 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 1, 0, 0 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 0, 1, 0 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 1, 1, 0 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 0, 0, 1 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 1, 0, 1 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 0, 1, 1 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
if ( ( child = this.Children[ 1, 1, 1 ] ) != null )
{
child._findNodes( t, ref list, exclude, includeVisitors, full );
}
}
public override void FindNodes( Sphere t,
ref List<PCZSceneNode> list,
List<Portal> visitedPortals,
bool includeVisitors,
bool recurseThruPortals,
PCZSceneNode exclude )
{
// if this zone has an enclosure, check against the enclosure AABB first
if ( null != mEnclosureNode )
{
if ( !mEnclosureNode.WorldAABB.Intersects( t ) )
{
// AABB of zone does not intersect t, just return.
return;
}
}
// check nodes at home in this zone
foreach ( PCZSceneNode pczsn in mHomeNodeList )
{
if ( pczsn != exclude )
{
// make sure node is not already in the list (might have been added in another
// zone it was visiting)
if ( !list.Contains( pczsn ) )
{
bool nsect = t.Intersects( pczsn.WorldAABB );
if ( nsect )
{
list.Add( pczsn );
}
}
}
}
if ( includeVisitors )
{
// check visitor nodes
foreach ( PCZSceneNode pczsn in mVisitorNodeList )
{
if ( pczsn != exclude )
{
// make sure node is not already in the list (might have been added in another
// zone it was visiting)
if ( !list.Contains( pczsn ) )
{
bool nsect = t.Intersects( pczsn.WorldAABB );
if ( nsect )
{
list.Add( pczsn );
}
}
}
}
}
// if asked to, recurse through portals
if ( recurseThruPortals )
{
foreach ( Portal portal in mPortals )
{
// check portal versus boundign box
if ( portal.intersects( t ) )
{
// make sure portal hasn't already been recursed through
if ( !visitedPortals.Contains( portal ) )
{
// save portal to the visitedPortals list
visitedPortals.Add( portal );
// recurse into the connected zone
portal.getTargetZone().FindNodes( t,
ref list,
visitedPortals,
includeVisitors,
recurseThruPortals,
exclude );
}
}
}
}
}
public bool IsObjectVisible( Sphere bound )
{
// Check originplane if told to
if ( mUseOriginPlane )
{
PlaneSide side = mOriginPlane.GetSide( bound.Center );
if ( side == PlaneSide.Negative )
{
Real dist = mOriginPlane.GetDistance( bound.Center );
if ( dist > bound.Radius )
{
return false;
}
}
}
// For each extra active culling plane, see if the entire sphere is on the negative side
// If so, object is not visible
foreach ( PCPlane plane in mActiveCullingPlanes )
{
PlaneSide xside = plane.GetSide( bound.Center );
if ( xside == PlaneSide.Negative )
{
float dist = mOriginPlane.GetDistance( bound.Center );
if ( dist > bound.Radius )
{
return false;
}
}
}
return true;
}
/// <summary>
/// Internal method for locating a list of shadow casters which
/// could be affecting the frustum for a given light.
/// </summary>
/// <remarks>
/// Custom scene managers are encouraged to override this method to add optimizations,
/// and to add their own custom shadow casters (perhaps for world geometry)
/// </remarks>
/// <param name="light"></param>
/// <param name="camera"></param>
protected virtual IList FindShadowCastersForLight( Light light, Camera camera )
{
this.shadowCasterList.Clear();
if ( light.Type == LightType.Directional )
{
// Basic AABB query encompassing the frustum and the extrusion of it
AxisAlignedBox aabb = new AxisAlignedBox();
Vector3[] corners = camera.WorldSpaceCorners;
Vector3 min, max;
Vector3 extrude = light.DerivedDirection * -this.shadowDirLightExtrudeDist;
// do first corner
min = max = corners[ 0 ];
min.Floor( corners[ 0 ] + extrude );
max.Ceil( corners[ 0 ] + extrude );
for ( int c = 1; c < 8; ++c )
{
min.Floor( corners[ c ] );
max.Ceil( corners[ c ] );
min.Floor( corners[ c ] + extrude );
max.Ceil( corners[ c ] + extrude );
}
aabb.SetExtents( min, max );
if ( this.shadowCasterAABBQuery == null )
{
this.shadowCasterAABBQuery = this.CreateAABBRegionQuery( aabb );
}
else
{
this.shadowCasterAABBQuery.Box = aabb;
}
// Execute, use callback
this.shadowCasterQueryListener.Prepare( false,
light.GetFrustumClipVolumes( camera ),
light,
camera,
this.shadowCasterList,
light.ShadowFarDistanceSquared );
this.shadowCasterAABBQuery.Execute( this.shadowCasterQueryListener );
}
else
{
Sphere s = new Sphere( light.DerivedPosition, light.AttenuationRange );
// eliminate early if camera cannot see light sphere
if ( camera.IsObjectVisible( s ) )
{
// create or init a sphere region query
if ( this.shadowCasterSphereQuery == null )
{
this.shadowCasterSphereQuery = this.CreateSphereRegionQuery( s );
}
else
{
this.shadowCasterSphereQuery.Sphere = s;
}
// check if the light is within view of the camera
bool lightInFrustum = camera.IsObjectVisible( light.DerivedPosition );
PlaneBoundedVolumeList volumeList = null;
// Only worth building an external volume list if
// light is outside the frustum
if ( !lightInFrustum )
{
volumeList = light.GetFrustumClipVolumes( camera );
}
// prepare the query and execute using the callback
this.shadowCasterQueryListener.Prepare(
lightInFrustum,
volumeList,
light,
camera,
this.shadowCasterList,
light.ShadowFarDistanceSquared );
this.shadowCasterSphereQuery.Execute( this.shadowCasterQueryListener );
}
}
return this.shadowCasterList;
}
public new bool IsObjectVisible( Sphere sphere )
{
if ( null != CullFrustum )
{
return CullFrustum.IsObjectVisible( sphere );
}
else
{
return base.IsObjectVisible( sphere );
}
}
/// <summary>
/// Creates a <see cref="SphereRegionSceneQuery"/> for this scene manager.
/// </summary>
/// <remarks>
/// This method creates a new instance of a query object for this scene manager,
/// for querying for objects within a spherical region.
/// </remarks>
/// <param name="sphere">Sphere to use for the region query.</param>
/// <returns>A specialized implementation of SphereRegionSceneQuery for this scene manager.</returns>
public SphereRegionSceneQuery CreateSphereRegionQuery( Sphere sphere )
{
return this.CreateSphereRegionQuery( sphere, 0xffffffff );
}
public new bool IsObjectVisible( Sphere sphere, out FrustumPlane culledBy )
{
if ( null != CullFrustum )
{
return CullFrustum.IsObjectVisible( sphere, out culledBy );
}
else
{
return base.IsObjectVisible( sphere, out culledBy );
}
}
public override void Execute( ISceneQueryListener listener )
{
Sphere testSphere = new Sphere();
MovableObjectFactoryMap factories = Root.Instance.MovableObjectFactories;
foreach ( KeyValuePair<string, MovableObjectFactory> map in factories )
{
MovableObjectCollection movableObjects = this.creator.GetMovableObjectCollection( map.Value.Type );
foreach ( MovableObject movableObject in movableObjects.Values )
{
// skip group if query type doesn't match
if ( ( this.QueryTypeMask & movableObject.TypeFlags ) == 0 )
{
break;
}
// skip if unattached or filtered out by query flags
if ( !movableObject.IsAttached || ( movableObject.QueryFlags & this.queryMask ) == 0 )
{
continue;
}
testSphere.Center = movableObject.ParentNode.DerivedPosition;
testSphere.Radius = movableObject.BoundingRadius;
// if the results came back positive, fire the event handler
if ( this.sphere.Intersects( testSphere ) )
{
listener.OnQueryResult( movableObject );
}
}
}
}
/// <summary>
/// Tests whether this ray intersects the given sphere.
/// </summary>
/// <param name="sphere"></param>
/// <returns>
/// Struct containing info on whether there was a hit, and the distance from the
/// origin of this ray where the intersect happened.
/// </returns>
public IntersectResult Intersects(Sphere sphere)
{
return(Utility.Intersects(this, sphere));
}
