private void NavCellsFromXML(XmlNode navMeshXml)
{
string[] navMeshStringRows = navMeshXml.InnerText.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
uint rowCount = (uint)navMeshStringRows.Length;
uint colomnCount = (uint)navMeshStringRows[0].Length;
// Compute derived room properties
float roomWidth = (float)colomnCount * GameConstants.NAV_MESH_WORLD_UNITS_SIZE;
float roomHeight = (float)rowCount * GameConstants.NAV_MESH_WORLD_UNITS_SIZE;
BitArray navCellData = new BitArray((int)(rowCount * colomnCount));
int navMeshDataIndex = 0;
foreach (string rowString in navMeshStringRows)
{
foreach (char c in rowString)
{
navCellData[navMeshDataIndex] = (c == '1');
++navMeshDataIndex;
}
}
m_colomnCount = colomnCount;
m_rowCount = rowCount;
m_nonEmptyNavCellCount = 0;
m_roomKey = null;
m_boundingBox = new AABB3d();
m_boundingBox.SetBounds2d(-roomWidth / 2.0f, -roomHeight / 2.0f, roomWidth / 2.0f, roomHeight / 2.0f);
NavMesh.BuildNavCellConnectivityGrid(
colomnCount,
rowCount,
navCellData,
out m_navCells,
out m_nonEmptyNavCellCount);
}
private void NavCellsFromCompressedRawByteArray(
byte[] compressedNavCells)
{
byte[] header = new byte[COMPRESSED_DATA_HEADER_BYTE_COUNT];
byte[] uncompressed =
CompressionUtilities.RunLengthDecodeByteArray(
compressedNavCells,
CompressionUtilities.eEncodeType.Zeros,
header);
BitArray navCellData = new BitArray(uncompressed);
// Read out the header
Debug.Assert(COMPRESSED_DATA_HEADER_BYTE_COUNT == 2);
uint colomnCount = (uint)header[0];
uint rowCount = (uint)header[1];
// Compute derived room properties
int navCellCount = (int)(rowCount * colomnCount);
float roomWidth = (float)colomnCount * GameConstants.NAV_MESH_WORLD_UNITS_SIZE;
float roomHeight = (float)rowCount * GameConstants.NAV_MESH_WORLD_UNITS_SIZE;
// Initialize the nav cell derived data
m_colomnCount = colomnCount;
m_rowCount = rowCount;
m_nonEmptyNavCellCount = 0;
m_roomKey = null;
m_boundingBox = new AABB3d();
m_boundingBox.SetBounds2d(-roomWidth / 2.0f, -roomHeight / 2.0f, roomWidth / 2.0f, roomHeight / 2.0f);
// Truncate extra bits added due to the bit array getting rounded up to the nearest byte
navCellData.Length = navCellCount;
// Compute the connectivity data from the nav cell bit array
NavMesh.BuildNavCellConnectivityGrid(
colomnCount,
rowCount,
navCellData,
out m_navCells,
out m_nonEmptyNavCellCount);
}
