public GeometryCompressor() {
// Create a compressed geometry header.
cgHeader = new CompressedGeometryData.Header();
// v1.0.0 - pre-FCS
// v1.0.1 - fixed winding order, FCS version (J3D 1.1.2)
// v1.0.2 - normal component length maximum 6, LII hardware (J3D 1.2)
cgHeader.majorVersionNumber = 1;
cgHeader.minorVersionNumber = 0;
cgHeader.minorMinorVersionNumber = 2;
}
//
// Compress the stream and put the results in the output buffer.
// Set up the CompressedGeometryData.Header object.
//
private void compressStream(CompressionStream stream) {
if (benchmark) startTime = System.currentTimeMillis();
// Create the Huffman table.
huffmanTable = new HuffmanTable();
// Quantize the stream, compute deltas between consecutive elements if
// possible, and histogram the data length distribution.
stream.quantize(huffmanTable);
// Compute tags for stream tokens.
huffmanTable.computeTags();
// Create the output buffer and assemble the compressed output.
outputBuffer = new CommandStream(stream.getByteCount() / 3);
stream.outputCommands(huffmanTable, outputBuffer);
// Print any desired info.
if (benchmark) printBench(stream);
if (printStream) stream.print();
if (printHuffman) huffmanTable.print();
// Set up the compressed geometry header object.
cgHeader.bufferType = stream.streamType;
cgHeader.bufferDataPresent = 0;
cgHeader.lowerBound = new Point3d(stream.ncBounds[0]);
cgHeader.upperBound = new Point3d(stream.ncBounds[1]);
if (stream.vertexNormals)
cgHeader.bufferDataPresent |= CompressedGeometryData.Header.NORMAL_IN_BUFFER;
if (stream.vertexColor3 || stream.vertexColor4)
cgHeader.bufferDataPresent |= CompressedGeometryData.Header.COLOR_IN_BUFFER;
if (stream.vertexColor4)
cgHeader.bufferDataPresent |= CompressedGeometryData.Header.ALPHA_IN_BUFFER;
cgHeader.start = 0;
cgHeader.size = outputBuffer.getByteCount();
// Clear the huffman table for next use.
huffmanTable.clear();
}
