private static UVCoord U16LEBytesToUV(byte[] data, int offset, UVCoord posMin, UVCoord posMax)
{
int offs = offset;
var buf = data;
if (!BitConverter.IsLittleEndian)
{
buf = new byte[6];
Buffer.BlockCopy(data, offs, buf, 0, 6);
Array.Reverse(buf, 0, 2);
Array.Reverse(buf, 2, 2);
Array.Reverse(buf, 4, 2);
offs = 0;
}
var vx = BitConverter.ToUInt16(buf, offs);
var vy = BitConverter.ToUInt16(buf, offs + 2);
var u = (vx * (posMax.U - posMin.U) / 65535f) + posMin.U;
var v = (vy * (posMax.V - posMin.V) / 65535f) + posMin.V;
return(new UVCoord(u, v));
}
protected void Load(byte[] data, int physOffset, int physSize)
{
AnArray submeshes;
using (var ms = new MemoryStream(data, physOffset, physSize))
{
using (var gz = new ZlibStream(ms, CompressionMode.Decompress))
{
submeshes = (AnArray)LlsdBinary.Deserialize(gz);
}
}
int faceNo = 0;
foreach (var iv in submeshes)
{
var submesh = (Map)iv;
var posMax = new Vector3(0.5, 0.5, 0.5);
var posMin = new Vector3(-0.5, -0.5, -0.5);
var uvMax = new UVCoord();
var uvMin = new UVCoord();
if (submesh.ContainsKey("PositionDomain"))
{
var posDom = (Map)submesh["PositionDomain"];
if (posDom.ContainsKey("Max"))
{
var ivdom = (AnArray)posDom["Max"];
posMax = new Vector3(ivdom[0].AsReal, ivdom[1].AsReal, ivdom[2].AsReal);
}
if (posDom.ContainsKey("Min"))
{
var ivdom = (AnArray)posDom["Min"];
posMin = new Vector3(ivdom[0].AsReal, ivdom[1].AsReal, ivdom[2].AsReal);
}
}
byte[] posBytes = (BinaryData)submesh["Position"];
byte[] normalBytes = null;
byte[] texcoordBytes = null;
if (submesh.ContainsKey("Normal"))
{
normalBytes = (BinaryData)submesh["Normal"];
}
if (submesh.ContainsKey("TexCoord0"))
{
texcoordBytes = (BinaryData)submesh["TexCoord0"];
var texDom = (Map)submesh["TexCoord0Domain"];
if (texDom.ContainsKey("Max"))
{
var domData = (AnArray)texDom["Max"];
uvMax.U = (float)domData[0].AsReal;
uvMax.V = (float)domData[1].AsReal;
}
if (texDom.ContainsKey("Min"))
{
var domData = (AnArray)texDom["Min"];
uvMin.U = (float)domData[0].AsReal;
uvMin.V = (float)domData[1].AsReal;
}
}
var faceIndexOffset = (ushort)Vertices.Count;
int uvBytePos = 0;
for (int i = 0; i < posBytes.Length; i += 6)
{
Vertices.Add(U16LEBytesToVertex(posBytes, i, posMin, posMax));
if (normalBytes != null)
{
Normals.Add(U16LEBytesToVertex(normalBytes, i, posMin, posMax));
}
if (texcoordBytes != null)
{
UVCoords.Add(U16LEBytesToUV(texcoordBytes, uvBytePos, uvMin, uvMax));
uvBytePos += 4;
}
}
byte[] triangleBytes = (BinaryData)submesh["TriangleList"];
for (int i = 0; i < triangleBytes.Length; i += 6)
{
var v1 = (ushort)(BytesLEToU16(triangleBytes, i) + faceIndexOffset);
var v2 = (ushort)(BytesLEToU16(triangleBytes, i + 2) + faceIndexOffset);
var v3 = (ushort)(BytesLEToU16(triangleBytes, i + 4) + faceIndexOffset);
var t = new Triangle(v1, v2, v3)
{
FaceIdx = faceNo
};
Triangles.Add(t);
}
++faceNo;
}
NumFaces = faceNo;
}
