public bool Prepare( ImportData importData )
{
FreeTemporaryResources();
FreeCPUResources();
CopyGlobalOptions();
//validate
if (
!( Bitwise.IsPow2( importData.TerrainSize - 1 ) && Bitwise.IsPow2( importData.MinBatchSize - 1 ) &&
Bitwise.IsPow2( importData.MaxBatchSize - 1 ) ) )
{
throw new AxiomException( "terrainSize, minBatchSize and maxBatchSize must all be n^2 + 1. Terrain.Prepare" );
}
if ( importData.MinBatchSize > importData.MaxBatchSize )
{
throw new AxiomException( "MinBatchSize must be less then or equal to MaxBatchSize. Terrain.Prepare" );
}
if ( importData.MaxBatchSize > TERRAIN_MAX_BATCH_SIZE )
{
throw new AxiomException( "MaxBatchSize must be not larger then {0} . Terrain.Prepare", TERRAIN_MAX_BATCH_SIZE );
}
Alignment = importData.TerrainAlign;
this.mSize = importData.TerrainSize;
this.mWorldSize = importData.WorldSize;
this.mLayerDecl = importData.LayerDeclaration;
CheckDeclaration();
this.mLayers = importData.LayerList;
CheckLayers( false );
DeriveUVMultipliers();
this.mMaxBatchSize = importData.MaxBatchSize;
this.mMinBatchSize = importData.MinBatchSize;
this.mPos = importData.Pos;
UpdateBaseScale();
DetermineLodLevels();
int numVertices = this.mSize*this.mSize;
this.mHeightData = new float[numVertices];
if ( importData.InputFloat != null )
{
if ( Utility.RealEqual( importData.InputBias, 0.0f ) && Utility.RealEqual( importData.InputScale, 1.0f ) )
{
//straigt copy
this.mHeightData = new float[numVertices];
Array.Copy( importData.InputFloat, this.mHeightData, this.mHeightData.Length );
}
else
{
// scale & bias, lets do it unsafe, should be faster :)
var src = importData.InputFloat;
for ( var i = 0; i < numVertices; ++i )
{
this.mHeightData[ i ] = ( src[ i ]*importData.InputScale ) + importData.InputBias;
}
}
}
else if ( importData.InputImage != null )
{
var img = importData.InputImage;
if ( img.Width != this.mSize || img.Height != this.mSize )
{
img.Resize( this.mSize, this.mSize );
}
// convert image data to floats
// Do this on a row-by-row basis, because we describe the terrain in
// a bottom-up fashion (ie ascending world coords), while Image is top-down
var pSrcBaseF = BufferBase.Wrap( img.Data );
var pHeightDataF = BufferBase.Wrap( this.mHeightData, mHeightData.Length * sizeof(float) );
for ( var i = 0; i < this.mSize; ++i )
{
var srcy = this.mSize - i - 1;
using ( var pSrc = pSrcBaseF + srcy*img.RowSpan )
{
using ( var pDest = pHeightDataF + i*this.mSize*sizeof ( float ) )
{
PixelConverter.BulkPixelConversion( pSrc, img.Format, pDest, PixelFormat.FLOAT32_R, this.mSize );
}
}
}
pSrcBaseF.Dispose();
pHeightDataF.Dispose();
if ( !Utility.RealEqual( importData.InputBias, 0.0f ) || !Utility.RealEqual( importData.InputScale, 1.0f ) )
{
for ( int i = 0; i < numVertices; ++i )
{
this.mHeightData[ i ] = ( this.mHeightData[ i ]*importData.InputScale ) + importData.InputBias;
}
}
}
else
{
// start with flat terrain
this.mHeightData = new float[this.mSize*this.mSize];
}
var deltaData = new float[numVertices];
this.mHeightDataPtr = BufferBase.Wrap( this.mHeightData,mHeightData.Length * sizeof(float) );
this.mDeltaDataPtr = BufferBase.Wrap( deltaData, deltaData.Length * sizeof(float) );
var numLevel = (ushort)(int)( NumLodLevels - 1 );
QuadTree = new TerrainQuadTreeNode( this, null, 0, 0, this.mSize, (ushort)( NumLodLevels - 1 ), 0, 0 );
QuadTree.Prepare();
//calculate entire terrain
var rect = new Rectangle();
rect.Top = 0;
rect.Bottom = this.mSize;
rect.Left = 0;
rect.Right = this.mSize;
CalculateHeightDeltas( rect );
FinalizeHeightDeltas( rect, true );
DistributeVertexData();
// Imported data is treated as modified because it's not saved
IsModified = true;
IsHeightDataModified = true;
return true;
}
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;
}