sceneTracker.cpp

Detailed Description

  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#include "scene/sceneTracker.h"
 25
 26
 27//=============================================================================
 28//    SceneObjectLink.
 29//=============================================================================
 30
 31//-----------------------------------------------------------------------------
 32
 33SceneObjectLink::SceneObjectLink( SceneTracker* tracker, SceneObject* object )
 34   : mObject( object ),
 35     mTracker( tracker ),
 36     mNextLink( NULL ),
 37     mPrevLink( NULL )
 38{
 39   if( object )
 40   {
 41      mNextLink = object->mSceneObjectLinks;
 42      if( mNextLink )
 43         mNextLink->mPrevLink = this;
 44      object->mSceneObjectLinks = this;
 45   }
 46}
 47
 48//-----------------------------------------------------------------------------
 49
 50SceneObjectLink::~SceneObjectLink()
 51{
 52   if( mObject )
 53   {
 54      // Unlink from SceneObject's tracker list.
 55
 56      if( mNextLink )
 57         mNextLink->mPrevLink = mPrevLink;
 58      if( mPrevLink )
 59         mPrevLink->mNextLink = mNextLink;
 60      else
 61         mObject->mSceneObjectLinks = mNextLink;
 62   }
 63}
 64
 65//-----------------------------------------------------------------------------
 66
 67void SceneObjectLink::update()
 68{
 69   getTracker()->updateObject( this );
 70}
 71
 72//-----------------------------------------------------------------------------
 73
 74SceneObjectLink* SceneObjectLink::getLinkForTracker( SceneTracker* tracker, SceneObject* fromObject )
 75{
 76   for( SceneObjectLink* link = fromObject->mSceneObjectLinks; link != NULL; link = link->getNextLink() )
 77      if( link->getTracker() == tracker )
 78         return link;
 79
 80   return NULL;
 81}
 82
 83//=============================================================================
 84//    SceneObjectLink.
 85//=============================================================================
 86
 87//-----------------------------------------------------------------------------
 88
 89SceneTracker::SceneTracker( bool isClientTracker, U32 typeMask )
 90   : mIsClientTracker( isClientTracker ),
 91     mObjectTypeMask( typeMask )
 92{
 93   // Hook up to SceneObject add/remove notifications.
 94
 95   SceneObject::smSceneObjectAdd.notify( this, &SceneTracker::registerObject );
 96   SceneObject::smSceneObjectRemove.notify( this, &SceneTracker::unregisterObject );
 97}
 98
 99//-----------------------------------------------------------------------------
100
101SceneTracker::~SceneTracker()
102{
103   SceneObject::smSceneObjectAdd.remove( this, &SceneTracker::registerObject );
104   SceneObject::smSceneObjectRemove.remove( this, &SceneTracker::unregisterObject );
105}
106
107//-----------------------------------------------------------------------------
108
109void SceneTracker::init()
110{
111   // Register existing scene graph objects.
112
113   SceneContainer* container;
114   if( isClientTracker() )
115      container = &gClientContainer;
116   else
117      container = &gServerContainer;
118
119   container->findObjects( getObjectTypeMask(),
120                           ( SceneContainer::FindCallback ) &_containerFindCallback,
121                           this );
122}
123
124//-----------------------------------------------------------------------------
125
126void SceneTracker::_containerFindCallback( SceneObject* object, SceneTracker* tracker )
127{
128   tracker->registerObject( object );
129}
130