Entity.m

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/*
 
Entity.m
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
#import "Entity.h"
#import "EntityOOJavaScriptExtensions.h"
#import "PlayerEntity.h"
#import "OOPlanetEntity.h"
 
#import "OOMaths.h"
#import "Universe.h"
#import "GameController.h"
#import "ResourceManager.h"
#import "OOConstToString.h"
 
#import "CollisionRegion.h"
 
#import "NSScannerOOExtensions.h"
#import "OODebugFlags.h"
#import "NSObjectOOExtensions.h"
 
#ifndef NDEBUG
uint32_t gLiveEntityCount = 0;
size_t gTotalEntityMemory = 0;
#endif
 
 
#ifndef NDEBUG
static NSString * const kOOLogEntityAddToList               = @"entity.linkedList.add";
static NSString * const kOOLogEntityAddToListError          = @"entity.linkedList.add.error";
static NSString * const kOOLogEntityRemoveFromList          = @"entity.linkedList.remove";
static NSString * const kOOLogEntityRemoveFromListError     = @"entity.linkedList.remove.error";
static NSString * const kOOLogEntityUpdateError             = @"entity.linkedList.update.error";
#endif
static NSString * const kOOLogEntityVerificationError       = @"entity.linkedList.verify.error";
 
 
 
@interface Entity (OOPrivate)
 
- (BOOL) checkLinkedLists;
 
@end
 
 
@implementation Entity
 
- (id) init
{
    self = [super init];
    if (EXPECT_NOT(self == nil))  return nil;
    
    _sessionID = [UNIVERSE sessionID];
    
    orientation = kIdentityQuaternion;
    rotMatrix = kIdentityMatrix;
    position = kZeroHPVector;
    
    no_draw_distance = 100000.0;  //  10 km
    
    collidingEntities = [[NSMutableArray alloc] init];
    
    scanClass = CLASS_NOT_SET;
    [self setStatus:STATUS_COCKPIT_DISPLAY];
    
    spawnTime = [UNIVERSE getTime];
    
    isSunlit = YES;
 
    atmosphereFogging = [[OOColor colorWithRed: 0.0 green: 0.0 blue: 0.0 alpha: 0.0] retain];
    
#ifndef NDEBUG
    gLiveEntityCount++;
    gTotalEntityMemory += [self oo_objectSize];
#endif
    
    lastDrawCounter = 0;
    return self;
}
 
 
- (void) dealloc
{
    [UNIVERSE ensureEntityReallyRemoved:self];
    DESTROY(collidingEntities);
    DESTROY(collisionRegion);
    [self deleteJSSelf];
    [self setOwner:nil];
    [atmosphereFogging release];
    
#ifndef NDEBUG
    gLiveEntityCount--;
    gTotalEntityMemory -= [self oo_objectSize];
#endif
    
    [super dealloc];
}
 
 
- (NSString *)descriptionComponents
{
    return [NSString stringWithFormat:@"position: %@ scanClass: %@ status: %@", HPVectorDescription([self position]), OOStringFromScanClass([self scanClass]), OOStringFromEntityStatus([self status])];
}
 
 
- (NSUInteger) sessionID
{
    return _sessionID;
}
 
 
- (BOOL)isShip
{
    return isShip;
}
 
 
- (BOOL)isDock
{
    return NO;
}
 
 
- (BOOL)isStation
{
    return isStation;
}
 
 
- (BOOL)isSubEntity
{
    return isSubEntity;
}
 
 
- (BOOL)isPlayer
{
    return isPlayer;
}
 
 
- (BOOL)isPlanet
{
    return NO;
}
 
 
- (BOOL)isSun
{
    return NO;
}
 
 
- (BOOL) isSunlit
{
    return isSunlit;
}
 
 
- (BOOL) isStellarObject
{
    return [self isPlanet] || [self isSun];
}
 
 
- (BOOL)isSky
{
    return NO;
}
 
- (BOOL)isWormhole
{
    return isWormhole;
}
 
 
- (BOOL) isEffect
{
    return NO;
}
 
 
- (BOOL) isVisualEffect
{
    return NO;
}
 
 
- (BOOL) isWaypoint
{
    return NO;
}
 
 
- (BOOL) validForAddToUniverse
{
    NSUInteger mySessionID = [self sessionID];
    NSUInteger currentSessionID = [UNIVERSE sessionID];
    if (EXPECT_NOT(mySessionID != currentSessionID))
    {
        OOLogERR(@"entity.invalidSession", @"Entity %@ from session %llu cannot be added to universe in session %llu. This is an internal error, please report it.", [self shortDescription], mySessionID, currentSessionID);
        return NO;
    }
    
    return YES;
}
 
 
- (void) addToLinkedLists
{
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
        OOLog(kOOLogEntityAddToList, @"DEBUG adding entity %@ to linked lists", self);
#endif
    //
    // insert at the start
    if (UNIVERSE)
    {
        x_previous = nil; x_next = UNIVERSE->x_list_start;
        // move UP the list
        while ((x_next)&&(x_next->position.x - x_next->collision_radius < position.x - collision_radius))
        {
            x_previous = x_next;
            x_next = x_next->x_next;
        }   
        if (x_next)     x_next->x_previous = self;
        if (x_previous) x_previous->x_next = self;
        else            UNIVERSE->x_list_start = self;
        
        y_previous = nil; y_next = UNIVERSE->y_list_start;
        // move UP the list
        while ((y_next)&&(y_next->position.y - y_next->collision_radius < position.y - collision_radius))
        {
            y_previous = y_next;
            y_next = y_next->y_next;
        }   
        if (y_next)     y_next->y_previous = self;
        if (y_previous) y_previous->y_next = self;
        else            UNIVERSE->y_list_start = self;
 
        z_previous = nil; z_next = UNIVERSE->z_list_start;
        // move UP the list
        while ((z_next)&&(z_next->position.z - z_next->collision_radius < position.z - collision_radius))
        {
            z_previous = z_next;
            z_next = z_next->z_next;
        }   
        if (z_next)     z_next->z_previous = self;
        if (z_previous) z_previous->z_next = self;
        else            UNIVERSE->z_list_start = self;
                
    }
    
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
    {
        if (![self checkLinkedLists])
        {
            OOLog(kOOLogEntityAddToListError, @"DEBUG LINKED LISTS - problem encountered while adding %@ to linked lists", self);
            [UNIVERSE debugDumpEntities];
        }
    }
#endif
}
 
 
- (void) removeFromLinkedLists
{
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
        OOLog(kOOLogEntityRemoveFromList, @"DEBUG removing entity %@ from linked lists", self);
#endif
    
    if ((x_next == nil)&&(x_previous == nil))   // removed already!
        return;
 
    // make sure the starting point is still correct
    if (UNIVERSE)
    {
        if ((UNIVERSE->x_list_start == self)&&(x_next))
                UNIVERSE->x_list_start = x_next;
        if ((UNIVERSE->y_list_start == self)&&(y_next))
                UNIVERSE->y_list_start = y_next;
        if ((UNIVERSE->z_list_start == self)&&(z_next))
                UNIVERSE->z_list_start = z_next;
    }
    //
    if (x_previous)     x_previous->x_next = x_next;
    if (x_next)         x_next->x_previous = x_previous;
    //
    if (y_previous)     y_previous->y_next = y_next;
    if (y_next)         y_next->y_previous = y_previous;
    //
    if (z_previous)     z_previous->z_next = z_next;
    if (z_next)         z_next->z_previous = z_previous;
    //
    x_previous = nil;   x_next = nil;
    y_previous = nil;   y_next = nil;
    z_previous = nil;   z_next = nil;
 
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
    {
        if (![self checkLinkedLists])
        {
            OOLog(kOOLogEntityRemoveFromListError, @"DEBUG LINKED LISTS - problem encountered while removing %@ from linked lists", self);
            [UNIVERSE debugDumpEntities];
        }
    }
#endif
}
 
 
- (BOOL) checkLinkedLists
{
    // DEBUG check for loops
    if (UNIVERSE->n_entities > 0)
    {
        int n;
        Entity  *check, *last;
        //
        last = nil;
        //
        n = UNIVERSE->n_entities;
        check = UNIVERSE->x_list_start;
        while ((n--)&&(check))
        {
            last = check;
            check = check->x_next;
        }
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken x_next %@ list (%d) ***", UNIVERSE->x_list_start, n);
            return NO;
        }
        //
        n = UNIVERSE->n_entities;
        check = last;
        while ((n--)&&(check))  check = check->x_previous;
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken x_previous %@ list (%d) ***", UNIVERSE->x_list_start, n);
            return NO;
        }
        //
        n = UNIVERSE->n_entities;
        check = UNIVERSE->y_list_start;
        while ((n--)&&(check))
        {
            last = check;
            check = check->y_next;
        }
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken y_next %@ list (%d) ***", UNIVERSE->y_list_start, n);
            return NO;
        }
        //
        n = UNIVERSE->n_entities;
        check = last;
        while ((n--)&&(check))  check = check->y_previous;
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken y_previous %@ list (%d) ***", UNIVERSE->y_list_start, n);
            return NO;
        }
        //
        n = UNIVERSE->n_entities;
        check = UNIVERSE->z_list_start;
        while ((n--)&&(check))
        {
            last = check;
            check = check->z_next;
        }
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken z_next %@ list (%d) ***", UNIVERSE->z_list_start, n);
            return NO;
        }
        //
        n = UNIVERSE->n_entities;
        check = last;
        while ((n--)&&(check))  check = check->z_previous;
        if ((check)||(n > 0))
        {
            OOLog(kOOLogEntityVerificationError, @"Broken z_previous %@ list (%d) ***", UNIVERSE->z_list_start, n);
            return NO;
        }
    }
    return YES;
}
 
 
- (void) updateLinkedLists
{
    if (!UNIVERSE)
        return; // not in the UNIVERSE - don't do this!
    if ((x_next == nil)&&(x_previous == nil))
        return; // not in the lists - don't do this!
    
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
    {
        if (![self checkLinkedLists])
        {
            OOLog(kOOLogEntityVerificationError, @"DEBUG LINKED LISTS problem encountered before updating linked lists for %@", self);
            [UNIVERSE debugDumpEntities];
        }
    }
#endif
    
    // update position in linked list for position.x
    // take self out of list..
    if (x_previous)     x_previous->x_next = x_next;
    if (x_next)         x_next->x_previous = x_previous;
    // sink DOWN the list
    while ((x_previous)&&(x_previous->position.x - x_previous->collision_radius > position.x - collision_radius))
    {
        x_next = x_previous;
        x_previous = x_previous->x_previous;
    }
    // bubble UP the list
    while ((x_next)&&(x_next->position.x - x_next->collision_radius < position.x - collision_radius))
    {
        x_previous = x_next;
        x_next = x_next->x_next;
    }
    if (x_next)     // insert self into the list before x_next..
        x_next->x_previous = self;
    if (x_previous) // insert self into the list after x_previous..
        x_previous->x_next = self;
    if ((x_previous == nil)&&(UNIVERSE))    // if we're the first then tell the UNIVERSE!
            UNIVERSE->x_list_start = self;
    
    // update position in linked list for position.y
    // take self out of list..
    if (y_previous)     y_previous->y_next = y_next;
    if (y_next)         y_next->y_previous = y_previous;
    // sink DOWN the list
    while ((y_previous)&&(y_previous->position.y - y_previous->collision_radius > position.y - collision_radius))
    {
        y_next = y_previous;
        y_previous = y_previous->y_previous;
    }
    // bubble UP the list
    while ((y_next)&&(y_next->position.y - y_next->collision_radius < position.y - collision_radius))
    {
        y_previous = y_next;
        y_next = y_next->y_next;
    }
    if (y_next)     // insert self into the list before y_next..
        y_next->y_previous = self;
    if (y_previous) // insert self into the list after y_previous..
        y_previous->y_next = self;
    if ((y_previous == nil)&&(UNIVERSE))    // if we're the first then tell the UNIVERSE!
            UNIVERSE->y_list_start = self;
    
    // update position in linked list for position.z
    // take self out of list..
    if (z_previous)     z_previous->z_next = z_next;
    if (z_next)         z_next->z_previous = z_previous;
    // sink DOWN the list
    while ((z_previous)&&(z_previous->position.z - z_previous->collision_radius > position.z - collision_radius))
    {
        z_next = z_previous;
        z_previous = z_previous->z_previous;
    }
    // bubble UP the list
    while ((z_next)&&(z_next->position.z - z_next->collision_radius < position.z - collision_radius))
    {
        z_previous = z_next;
        z_next = z_next->z_next;
    }
    if (z_next)     // insert self into the list before z_next..
        z_next->z_previous = self;
    if (z_previous) // insert self into the list after z_previous..
        z_previous->z_next = self;
    if ((z_previous == nil)&&(UNIVERSE))    // if we're the first then tell the UNIVERSE!
            UNIVERSE->z_list_start = self;
    
    // done
#ifndef NDEBUG
    if (gDebugFlags & DEBUG_LINKED_LISTS)
    {
        if (![self checkLinkedLists])
        {
            OOLog(kOOLogEntityUpdateError, @"DEBUG LINKED LISTS problem encountered after updating linked lists for %@", self);
            [UNIVERSE debugDumpEntities];
        }
    }
#endif
}
 
 
- (void) wasAddedToUniverse
{
    // Do nothing
}
 
 
- (void) wasRemovedFromUniverse
{
    // Do nothing
}
 
 
- (void) warnAboutHostiles
{
    // do nothing for now, this can be expanded in sub classes
    OOLog(@"general.error.subclassResponsibility.Entity-warnAboutHostiles", @"%@", @"***** Entity does nothing in warnAboutHostiles");
}
 
 
- (CollisionRegion*) collisionRegion
{
    return collisionRegion;
}
 
 
- (void) setCollisionRegion: (CollisionRegion*) region
{
    if (collisionRegion) [collisionRegion release];
    collisionRegion = [region retain];
}
 
 
- (void) setUniversalID:(OOUniversalID)uid
{
    universalID = uid;
}
 
 
- (OOUniversalID) universalID
{
    return universalID;
}
 
 
- (BOOL) throwingSparks
{
    return throw_sparks;
}
 
 
- (void) setThrowSparks:(BOOL) value
{
    throw_sparks = value;
}
 
 
- (void) throwSparks
{
    // do nothing for now
}
 
 
- (void) setOwner:(Entity *)ent
{
    [_owner release];
    _owner = [ent weakRetain];
}
 
 
- (id) owner
{
    return [_owner weakRefUnderlyingObject];
}
 
 
- (ShipEntity *)parentEntity
{
    id owner = [self owner];
    if ([owner isShipWithSubEntityShip:self])  return owner;
    return nil;
}
 
 
- (id<OOWeakReferenceSupport>) superShaderBindingTarget
{
    return [self parentEntity];
}
 
 
- (ShipEntity *) rootShipEntity
{
    ShipEntity *parent = [self parentEntity];
    if (parent != nil)  return [parent rootShipEntity];
    if ([self isShip])  return (ShipEntity *)self;
    return nil;
}
 
 
- (HPVector) position
{
    return position;
}
 
- (Vector) cameraRelativePosition
{
    return cameraRelativePosition;
}
 
- (GLfloat) cameraRangeFront
{
    return magnitude(cameraRelativePosition) - [self frustumRadius];
}
 
- (GLfloat) cameraRangeBack
{
    return magnitude(cameraRelativePosition) + [self frustumRadius];
}
 
 
 
// Exposed to uniform bindings.
// so needs to remain at OpenGL precision levels
- (Vector) relativePosition
{
    return HPVectorToVector(HPvector_subtract([self position], [PLAYER position]));
}
 
- (Vector) vectorTo:(Entity *)entity
{
    return HPVectorToVector(HPvector_subtract([entity position], [self position]));
}
 
 
- (void) setPosition:(HPVector) posn
{
    position = posn;
    [self updateCameraRelativePosition];
}
 
 
- (void) setPositionX:(OOHPScalar)x y:(OOHPScalar)y z:(OOHPScalar)z
{
    position.x = x;
    position.y = y;
    position.z = z;
    [self updateCameraRelativePosition];
}
 
 
- (void) updateCameraRelativePosition
{
    cameraRelativePosition = HPVectorToVector(HPvector_subtract([self absolutePositionForSubentity],[PLAYER viewpointPosition]));
}
 
 
- (HPVector) absolutePositionForSubentity
{
    return [self absolutePositionForSubentityOffset:kZeroHPVector];
}
 
 
- (HPVector) absolutePositionForSubentityOffset:(HPVector) offset
{
    HPVector        abspos = HPvector_add(position, OOHPVectorMultiplyMatrix(offset, rotMatrix));
    Entity      *last = nil;
    Entity      *father = [self parentEntity];
    
    while (father != nil && father != last)
    {
        abspos = HPvector_add(OOHPVectorMultiplyMatrix(abspos, [father drawRotationMatrix]), [father position]);
        last = father;
        if (![last isSubEntity]) break;
        father = [father owner];
    }
    return abspos;
}
 
 
- (double) zeroDistance
{
    return zero_distance;
}
 
 
- (double) camZeroDistance
{
    return cam_zero_distance;
}
 
 
- (NSComparisonResult) compareZeroDistance:(Entity *)otherEntity
{
    if ((otherEntity)&&(zero_distance > otherEntity->zero_distance))
        return NSOrderedAscending;
    else
        return NSOrderedDescending;
}
 
 
- (BoundingBox) boundingBox
{
    return boundingBox;
}
 
 
- (GLfloat) mass
{
    return mass;
}
 
 
- (void) setOrientation:(Quaternion) quat
{
    orientation = quat;
    [self orientationChanged];
}
 
 
- (Quaternion) orientation
{
    return orientation;
}
 
 
- (Quaternion) normalOrientation
{
    return [self orientation];
}
 
 
- (void) setNormalOrientation:(Quaternion) quat
{
    [self setOrientation:quat];
}
 
 
- (void) orientationChanged
{
    quaternion_normalize(&orientation);
    rotMatrix = OOMatrixForQuaternionRotation(orientation);
}
 
 
- (void) setVelocity:(Vector) vel
{
    velocity = vel;
}
 
 
- (Vector) velocity
{
    return velocity;
}
 
 
- (double) speed
{
    return magnitude([self velocity]);
}
 
 
- (GLfloat) distanceTravelled
{
    return distanceTravelled;
}
 
 
- (void) setDistanceTravelled: (GLfloat) value
{
    distanceTravelled = value;
}
 
 
- (void) setStatus:(OOEntityStatus) stat
{
    _status = stat;
}
 
 
- (OOEntityStatus) status
{
    return _status;
}
 
 
- (void) setScanClass:(OOScanClass)sClass
{
    scanClass = sClass;
}
 
 
- (OOScanClass) scanClass
{
    return scanClass;
}
 
 
- (void) setEnergy:(GLfloat) amount
{
    energy = amount;
}
 
 
- (GLfloat) energy
{
    return energy;
}
 
 
- (void) setMaxEnergy:(GLfloat)amount
{
    maxEnergy = amount;
}
 
 
- (GLfloat) maxEnergy
{
    return maxEnergy;
}
 
 
- (void) applyRoll:(GLfloat) roll andClimb:(GLfloat) climb
{
    if ((roll == 0.0)&&(climb == 0.0)&&(!hasRotated))
        return;
 
    if (roll)
        quaternion_rotate_about_z(&orientation, -roll);
    if (climb)
        quaternion_rotate_about_x(&orientation, -climb);
    
    [self orientationChanged];
}
 
 
- (void) applyRoll:(GLfloat) roll climb:(GLfloat) climb andYaw:(GLfloat) yaw
{
    if ((roll == 0.0)&&(climb == 0.0)&&(yaw == 0.0)&&(!hasRotated))
        return;
 
    if (roll)
        quaternion_rotate_about_z(&orientation, -roll);
    if (climb)
        quaternion_rotate_about_x(&orientation, -climb);
    if (yaw)
        quaternion_rotate_about_y(&orientation, -yaw);
 
    [self orientationChanged];
}
 
 
- (void) moveForward:(double)amount
{
    HPVector forward = HPvector_multiply_scalar(HPvector_forward_from_quaternion(orientation), amount);
    position = HPvector_add(position, forward);
    distanceTravelled += amount;
}
 
 
- (OOMatrix) rotationMatrix
{
    return rotMatrix;
}
 
 
- (OOMatrix) drawRotationMatrix
{
    return rotMatrix;
}
 
 
- (OOMatrix) transformationMatrix
{
    OOMatrix result = rotMatrix;
    return OOMatrixHPTranslate(result, position);
}
 
 
- (OOMatrix) drawTransformationMatrix
{
    OOMatrix result = rotMatrix;
    return OOMatrixHPTranslate(result, position);
}
 
 
- (BOOL) canCollide
{
    return YES;
}
 
 
- (GLfloat) collisionRadius
{
    return collision_radius;
}
 
 
- (GLfloat) frustumRadius
{
    return collision_radius;
}
 
 
- (void) setCollisionRadius:(GLfloat) amount
{
    collision_radius = amount;
}
 
 
- (NSMutableArray *) collisionArray
{
    return collidingEntities;
}
 
 
- (void) update:(OOTimeDelta)delta_t
{
    if (_status != STATUS_COCKPIT_DISPLAY)
    {
        if ([self isSubEntity])
        {
            zero_distance = [[self owner] zeroDistance];
            cam_zero_distance = [[self owner] camZeroDistance];
            [self updateCameraRelativePosition];
        }
        else
        {
            zero_distance = HPdistance2(PLAYER->position, position);
            cam_zero_distance = HPdistance2([PLAYER viewpointPosition], position);
            [self updateCameraRelativePosition];
        }
    }
    else
    {
        zero_distance = HPmagnitude2(position);
        cam_zero_distance = zero_distance;
        cameraRelativePosition = HPVectorToVector(position);
    }
    
    if ([self status] != STATUS_COCKPIT_DISPLAY)
    {
        [self applyVelocity:delta_t];
    }
 
    hasMoved = !HPvector_equal(position, lastPosition);
    hasRotated = !quaternion_equal(orientation, lastOrientation);
    lastPosition = position;
    lastOrientation = orientation;
}
 
 
- (void) applyVelocity:(OOTimeDelta)delta_t
{
    position = HPvector_add(position, HPvector_multiply_scalar(vectorToHPVector(velocity), delta_t));
}
 
 
- (BOOL) checkCloseCollisionWith:(Entity *)other
{
    return other != nil;
}
 
 
- (double)findCollisionRadius
{
    OOLogGenericSubclassResponsibility();
    return 0;
}
 
 
- (void) drawImmediate:(bool)immediate translucent:(bool)translucent
{
    OOLogGenericSubclassResponsibility();
}
 
 
- (void) takeEnergyDamage:(double) amount from:(Entity *) ent becauseOf:(Entity *) other weaponIdentifier:(NSString *)weaponIdentifier
{
    
}
 
 
- (void)dumpState
{
    if (OOLogWillDisplayMessagesInClass(@"dumpState"))
    {
        OOLog(@"dumpState", @"State for %@:", self);
        OOLogPushIndent();
        OOLogIndent();
        @try
        {
            [self dumpSelfState];
        }
        @catch (id exception) {}
        OOLogPopIndent();
    }
}
 
 
- (void)dumpSelfState
{
    NSMutableArray      *flags = nil;
    NSString            *flagsString = nil;
    id                  owner = [self owner];
    
    if (owner == self)  owner = @"self";
    else if (owner == nil)  owner = @"none";
    
    OOLog(@"dumpState.entity", @"Universal ID: %u", universalID);
    OOLog(@"dumpState.entity", @"Scan class: %@", OOStringFromScanClass(scanClass));
    OOLog(@"dumpState.entity", @"Status: %@", OOStringFromEntityStatus([self status]));
    OOLog(@"dumpState.entity", @"Position: %@", HPVectorDescription(position));
    OOLog(@"dumpState.entity", @"Orientation: %@", QuaternionDescription(orientation));
    OOLog(@"dumpState.entity", @"Distance travelled: %g", distanceTravelled);
    OOLog(@"dumpState.entity", @"Energy: %g of %g", energy, maxEnergy);
    OOLog(@"dumpState.entity", @"Mass: %g", mass);
    OOLog(@"dumpState.entity", @"Owner: %@", owner);
    
    flags = [NSMutableArray array];
    #define ADD_FLAG_IF_SET(x)      if (x) { [flags addObject:@#x]; }
    ADD_FLAG_IF_SET(isShip);
    ADD_FLAG_IF_SET(isStation);
    ADD_FLAG_IF_SET(isPlayer);
    ADD_FLAG_IF_SET(isWormhole);
    ADD_FLAG_IF_SET(isSubEntity);
    ADD_FLAG_IF_SET(hasMoved);
    ADD_FLAG_IF_SET(hasRotated);
    ADD_FLAG_IF_SET(isSunlit);
    ADD_FLAG_IF_SET(throw_sparks);
    flagsString = [flags count] ? [flags componentsJoinedByString:@", "] : (NSString *)@"none";
    OOLog(@"dumpState.entity", @"Flags: %@", flagsString);
    OOLog(@"dumpState.entity", @"Collision Test Filter: %u", collisionTestFilter);
 
}
 
 
- (void)subEntityReallyDied:(ShipEntity *)sub
{
    OOLog(@"entity.bug", @"%s called for non-ship entity %p by %p", __PRETTY_FUNCTION__, self, sub);
}
 
 
- (NSUInteger) lastDrawCounter
{
    return lastDrawCounter;
}
 
 
- (void) setLastDrawCounter: (NSUInteger) drawCounter
{
    lastDrawCounter = drawCounter;
    return;
}
 
 
// For shader bindings.
- (GLfloat)universalTime
{
    return [UNIVERSE getTime];
}
 
 
- (GLfloat)spawnTime
{
    return spawnTime;
}
 
 
- (GLfloat)timeElapsedSinceSpawn
{
    return [UNIVERSE getTime] - spawnTime;
}
 
 
- (void) setAtmosphereFogging: (OOColor *)fogging
{
    [atmosphereFogging release];
    atmosphereFogging = [fogging retain];
}
 
- (OOColor *) fogUniform
{
    return [[atmosphereFogging retain] autorelease];
}
 
#ifndef NDEBUG
- (NSString *) descriptionForObjDumpBasic
{
    NSString *result = [self descriptionComponents];
    if (result != nil)  result = [NSString stringWithFormat:@"%@ %@", NSStringFromClass([self class]), result];
    else  result = [self description];
    
    return result;
}
 
 
- (NSString *) descriptionForObjDump
{
    NSString *result = [self descriptionForObjDumpBasic];
    
    result = [result stringByAppendingFormat:@" range: %g (visible: %@)", HPdistance([self position], [PLAYER position]), [self isVisible] ? @"yes" : @"no"];
    
    return result;
}
 
 
- (NSSet *) allTextures
{
    return nil;
}
#endif
 
 
- (BOOL) isVisible
{
    return cam_zero_distance <= ABSOLUTE_NO_DRAW_DISTANCE2;
}
 
 
- (BOOL) isInSpace
{
    switch ([self status])
    {
    case STATUS_IN_FLIGHT:
    case STATUS_DOCKING:
    case STATUS_LAUNCHING:
    case STATUS_AUTOPILOT_ENGAGED:
    case STATUS_WITCHSPACE_COUNTDOWN:
    case STATUS_BEING_SCOOPED:
    case STATUS_EFFECT:
    case STATUS_ACTIVE:
        return YES;
    default:
        return NO;
    }
}
 
 
- (BOOL) isImmuneToBreakPatternHide
{
    return isImmuneToBreakPatternHide;
}
 
@end