void DecompressIndexBuffer( Ty* triangles, uint32_t triangleCount, ReadBitstream& input )
{
IndexBufferCompressionFormat format = static_cast< IndexBufferCompressionFormat >( input.ReadVInt() );
switch ( format )
{
case IBCF_PER_INDICE_1:
DecompressIndiceCodes1<Ty>( triangles, triangleCount, input );
break;
case IBCF_PER_TRIANGLE_1:
DecompressTriangleCodes1<Ty>( triangles, triangleCount, input );
break;
default: // IBCF_AUTO:
break;
}
}
void DecompressTriangleCodes1( Ty* triangles, uint32_t triangleCount, ReadBitstream& input )
{
Edge edgeFifo[ EDGE_FIFO_SIZE ];
uint32_t vertexFifo[ VERTEX_FIFO_SIZE ];
uint32_t edgesRead = 0;
uint32_t verticesRead = 0;
uint32_t newVertices = 0;
const Ty* triangleEnd = triangles + ( triangleCount * 3 );
// iterate through the triangles
for ( Ty* triangle = triangles; triangle < triangleEnd; triangle += 3 )
{
IndexBufferTriangleCodes code = static_cast< IndexBufferTriangleCodes >( input.Read( IB_TRIANGLE_CODE_BITS ) );
switch ( code )
{
case IB_EDGE_NEW:
{
uint32_t edgeFifoIndex = input.Read( CACHED_EDGE_BITS );
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices );
++newVertices;
++verticesRead;
break;
}
case IB_EDGE_CACHED:
{
uint32_t edgeFifoIndex = input.Read( CACHED_EDGE_BITS );
uint32_t vertexFifoIndex = input.Read( CACHED_VERTEX_BITS );
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
break;
}
case IB_EDGE_FREE:
{
uint32_t edgeFifoIndex = input.Read( CACHED_EDGE_BITS );
uint32_t relativeVertex = input.ReadVInt();
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
++verticesRead;
break;
}
case IB_NEW_NEW_NEW:
{
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices + 2 );
newVertices += 3;
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_NEW_CACHED:
{
uint32_t vertexFifoIndex = input.Read( CACHED_VERTEX_BITS );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
verticesRead += 2;
newVertices += 2;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_NEW_FREE:
{
uint32_t relativeVertex = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
newVertices += 2;
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_CACHED_CACHED:
{
uint32_t vertex1FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t vertex2FifoIndex = input.Read( CACHED_VERTEX_BITS );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex2FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
++verticesRead;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_CACHED_FREE:
{
uint32_t vertexFifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t relativeVertex = input.ReadVInt();
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
verticesRead += 2;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_FREE_CACHED:
{
uint32_t relativeVertex = input.ReadVInt();
uint32_t vertexFifoIndex = input.Read( CACHED_VERTEX_BITS );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
verticesRead += 2;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_FREE_FREE:
{
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 3;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_CACHED_CACHED:
{
uint32_t vertex0FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t vertex1FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t vertex2FifoIndex = input.Read( CACHED_VERTEX_BITS );
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex2FifoIndex ) & VERTEX_FIFO_MASK ] );
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_CACHED_FREE:
{
uint32_t vertex0FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t vertex1FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t relativeVertex2 = input.ReadVInt();
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
++verticesRead;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_FREE_FREE:
{
uint32_t vertex0FifoIndex = input.Read( CACHED_VERTEX_BITS );
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 2;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_FREE_FREE_FREE:
{
uint32_t relativeVertex0 = input.ReadVInt();
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex0 );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_EDGE_0_NEW:
{
const Edge& edge = edgeFifo[ ( edgesRead - 1 ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices );
++newVertices;
++verticesRead;
break;
}
case IB_EDGE_1_NEW:
{
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - 1 ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices );
++newVertices;
++verticesRead;
break;
}
}
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 1 ], triangle[ 2 ] );
++edgesRead;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 2 ], triangle[ 0 ] );
++edgesRead;
}
}
void DecompressIndiceCodes1( Ty* triangles, uint32_t triangleCount, ReadBitstream& input )
{
Edge edgeFifo[ EDGE_FIFO_SIZE ];
uint32_t vertexFifo[ VERTEX_FIFO_SIZE ];
uint32_t edgesRead = 0;
uint32_t verticesRead = 0;
uint32_t newVertices = 0;
const Ty* triangleEnd = triangles + ( triangleCount * 3 );
// iterate through the triangles
for ( Ty* triangle = triangles; triangle < triangleEnd; triangle += 3 )
{
int readVertex = 0;
bool skipFirstEdge = false;
while ( readVertex < 3 )
{
IndexBufferCodes code = static_cast< IndexBufferCodes >( input.Read( IB_VERTEX_CODE_BITS ) );
switch ( code )
{
case IB_NEW_VERTEX:
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ readVertex ] = static_cast< Ty >( newVertices );
++readVertex;
++verticesRead;
++newVertices;
break;
case IB_CACHED_EDGE:
{
assert( readVertex == 0 );
uint32_t fifoIndex = input.Read( CACHED_EDGE_BITS );
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - fifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
readVertex += 2;
skipFirstEdge = true;
break;
}
case IB_CACHED_VERTEX:
{
uint32_t fifoIndex = input.Read( CACHED_VERTEX_BITS );
triangle[ readVertex ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - fifoIndex ) & VERTEX_FIFO_MASK ] );
++readVertex;
break;
}
case IB_FREE_VERTEX:
{
uint32_t relativeVertex = input.ReadVInt();
uint32_t vertex = ( newVertices - 1 ) - relativeVertex;
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ readVertex ] = static_cast< Ty >( vertex );
++verticesRead;
++readVertex;
break;
}
}
}
if ( !skipFirstEdge )
{
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
}
else // first 2 verts were an edge case, so insert them into the vertex fifo.
{
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] = triangle[ 0 ];
++verticesRead;
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] = triangle[ 1 ];
++verticesRead;
}
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 1 ], triangle[ 2 ] );
++edgesRead;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 2 ], triangle[ 0 ] );
++edgesRead;
}
}
void DecompressTriangleCodesPrefix( Ty* triangles, uint32_t triangleCount, ReadBitstream& input )
{
Edge edgeFifo[ EDGE_FIFO_SIZE ];
uint32_t vertexFifo[ VERTEX_FIFO_SIZE ];
uint32_t edgesRead = 0;
uint32_t verticesRead = 0;
uint32_t newVertices = 0;
const Ty* triangleEnd = triangles + ( triangleCount * 3 );
// iterate through the triangles
for ( Ty* triangle = triangles; triangle < triangleEnd; triangle += 3 )
{
IndexBufferTriangleCodes code = static_cast< IndexBufferTriangleCodes >( input.Decode( TriangleDecoding, TRIANGLE_MAX_CODE_LENGTH ) );
switch ( code )
{
case IB_EDGE_NEW:
{
uint32_t edgeFifoIndex = input.Decode( EdgeDecoding, EDGE_MAX_CODE_LENGTH );
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & EDGE_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices );
++newVertices;
++verticesRead;
break;
}
case IB_EDGE_CACHED:
{
uint32_t edgeFifoIndex = input.Decode( EdgeDecoding, EDGE_MAX_CODE_LENGTH );
uint32_t vertexFifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
break;
}
case IB_EDGE_FREE:
{
uint32_t edgeFifoIndex = input.Decode( EdgeDecoding, EDGE_MAX_CODE_LENGTH );
uint32_t relativeVertex = input.ReadVInt();
const Edge& edge = edgeFifo[ ( ( edgesRead - 1 ) - edgeFifoIndex ) & EDGE_FIFO_MASK ];
triangle[ 0 ] = static_cast< Ty >( edge.second );
triangle[ 1 ] = static_cast< Ty >( edge.first );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
++verticesRead;
break;
}
case IB_NEW_NEW_NEW:
{
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( newVertices + 2 );
newVertices += 3;
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_NEW_CACHED:
{
uint32_t vertexFifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
verticesRead += 2;
newVertices += 2;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_NEW_FREE:
{
uint32_t relativeVertex = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( newVertices + 1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
newVertices += 2;
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_CACHED_CACHED:
{
uint32_t vertex1FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t vertex2FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex2FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
++verticesRead;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_CACHED_FREE:
{
uint32_t vertexFifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t relativeVertex = input.ReadVInt();
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
verticesRead += 2;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_FREE_CACHED:
{
uint32_t relativeVertex = input.ReadVInt();
uint32_t vertexFifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertexFifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex );
verticesRead += 2;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_NEW_FREE_FREE:
{
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( newVertices );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 3;
++newVertices;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_CACHED_CACHED:
{
uint32_t vertex0FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t vertex1FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t vertex2FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 2 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex2FifoIndex ) & VERTEX_FIFO_MASK ] );
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_CACHED_FREE:
{
uint32_t vertex0FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t vertex1FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t relativeVertex2 = input.ReadVInt();
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
triangle[ 1 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex1FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
++verticesRead;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_CACHED_FREE_FREE:
{
uint32_t vertex0FifoIndex = input.Decode( VertexDecoding, VERTEX_MAX_CODE_LENGTH );
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
triangle[ 0 ] = static_cast< Ty >( vertexFifo[ ( ( verticesRead - 1 ) - vertex0FifoIndex ) & VERTEX_FIFO_MASK ] );
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 2;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
case IB_FREE_FREE_FREE:
{
uint32_t relativeVertex0 = input.ReadVInt();
uint32_t relativeVertex1 = input.ReadVInt();
uint32_t relativeVertex2 = input.ReadVInt();
vertexFifo[ verticesRead & VERTEX_FIFO_MASK ] =
triangle[ 0 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex0 );
vertexFifo[ ( verticesRead + 1 ) & VERTEX_FIFO_MASK ] =
triangle[ 1 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex1 );
vertexFifo[ ( verticesRead + 2 ) & VERTEX_FIFO_MASK ] =
triangle[ 2 ] = static_cast< Ty >( ( newVertices - 1 ) - relativeVertex2 );
verticesRead += 3;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 0 ], triangle[ 1 ] );
++edgesRead;
break;
}
}
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 1 ], triangle[ 2 ] );
++edgesRead;
edgeFifo[ edgesRead & EDGE_FIFO_MASK ].set( triangle[ 2 ], triangle[ 0 ] );
++edgesRead;
}
// Skip over padding at the end, put in so a short prefix code (1 bit) doesn't cause an overflow
input.Read( LONGEST_PREFIX_CODE - 1 );
}
