public bool Prepare( StreamSerializer stream )
{
FreeTemporaryResources();
FreeCPUResources();
CopyGlobalOptions();
if ( stream.ReadChunkBegin( TERRAIN_CHUNK_ID, TERRAIN_CHUNK_VERSION ) == null )
{
return false;
}
byte align;
stream.Read( out align );
Alignment = (Alignment)align;
stream.Read( out this.mSize );
stream.Read( out this.mWorldSize );
stream.Read( out this.mMaxBatchSize );
stream.Read( out this.mMinBatchSize );
stream.Read( out this.mPos );
RootSceneNode.Position = this.mPos;
UpdateBaseScale();
DetermineLodLevels();
int numVertices = this.mSize*this.mSize;
this.mHeightData = new float[numVertices];
stream.Read( out this.mHeightData );
// layer declaration
if ( !ReadLayerDeclaration( ref stream, ref this.mLayerDecl ) )
{
return false;
}
CheckDeclaration();
// Layers
if ( !ReadLayerInstanceList( ref stream, this.mLayerDecl.Elements.Count, ref this.mLayers ) )
{
return false;
}
DeriveUVMultipliers();
// Packed layer blend data
var numLayers = (byte)this.mLayers.Count;
stream.Read( out this.mLayerBlendMapSize );
this.mLayerBlendSizeActual = this.mLayerBlendMapSize; // for now, until we check
//load packed CPU data
var numBlendTex = GetBlendTextureCount( numLayers );
for ( var i = 0; i < numBlendTex; ++i )
{
var fmt = GetBlendTextureFormat( (byte)i, numLayers );
var channels = PixelUtil.GetNumElemBytes( fmt );
var dataSz = channels*this.mLayerBlendMapSize*this.mLayerBlendMapSize;
var data = new byte[dataSz];
stream.Read( out data );
this.mCpuBlendMapStorage.AddRange( data );
}
//derived data
while ( !stream.IsEndOfChunk( TERRAIN_CHUNK_ID ) && stream.NextChunkId == TERRAINDERIVEDDATA_CHUNK_ID )
{
stream.ReadChunkBegin( TERRAINDERIVEDDATA_CHUNK_ID, TERRAINDERIVEDDATA_CHUNK_VERSION );
//name
var name = string.Empty;
stream.Read( out name );
ushort sz;
stream.Read( out sz );
if ( name == "normalmap" )
{
this.mNormalMapRequired = true;
var data = new byte[sz*sz*3];
stream.Read( out data );
using ( var pDataF = BufferBase.Wrap( data ) )
{
this.mCpuTerrainNormalMap = new PixelBox( sz, sz, 1, PixelFormat.BYTE_RGB, pDataF );
}
}
else if ( name == "colormap" )
{
IsGlobalColorMapEnabled = true;
GlobalColorMapSize = sz;
this.mCpuColorMapStorage = new byte[sz*sz*3];
stream.Read( out this.mCpuColorMapStorage );
}
else if ( name == "lightmap" )
{
this.mLightMapRequired = true;
LightMapSize = sz;
this.mCpuLightmapStorage = new byte[sz*sz];
stream.Read( out this.mCpuLightmapStorage );
}
else if ( name == "compositemap" )
{
this.mCompositeMapRequired = true;
this.mCompositeMapSize = sz;
this.mCpuCompositeMapStorage = new byte[sz*sz*4];
stream.Read( out this.mCpuCompositeMapStorage );
}
stream.ReadChunkEnd( TERRAINDERIVEDDATA_CHUNK_ID );
}
//Load delta data
var deltaData = new byte[ sizeof( float ) * numVertices ];
stream.Read( out deltaData );
this.mDeltaDataPtr = BufferBase.Wrap( deltaData );
//Create and load quadtree
QuadTree = new TerrainQuadTreeNode( this, null, 0, 0, this.mSize, (ushort)( NumLodLevels - 1 ), 0, 0 );
QuadTree.Prepare();
stream.ReadChunkEnd( TERRAIN_CHUNK_ID );
DistributeVertexData();
IsModified = false;
IsHeightDataModified = false;
return true;
}