void ReadChunk(FileStream fileStream, BinaryReader binaryReader)
{
string chunkType = new string(binaryReader.ReadChars(4));
int chunkLength = (int)binaryReader.ReadUInt32();
if (chunkType == "PNTS")
{
Debug.WriteLine(chunkType + ", length " + chunkLength);
int vertexCount = chunkLength / 12;
model.vertices = new Vector3[vertexCount];
for (int i = 0; i < vertexCount; i++)
{
model.vertices[i] = new Vector3(binaryReader.ReadSingle(), binaryReader.ReadSingle(), -binaryReader.ReadSingle());
}
}
else if (chunkType == "SRFS")
{
Debug.WriteLine(chunkType + ", length " + chunkLength);
string stuff = new string(binaryReader.ReadChars(chunkLength));
string[] splitStrings = stuff.Split(new char[] { '\0' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < splitStrings.Length; i++)
{
model.surfaces.Add(new Surface());
model.surfaces[i].name = splitStrings[i];
}
}
else if (chunkType == "POLS")
{
Debug.WriteLine(chunkType + ", length " + chunkLength);
long startPoint = fileStream.Position;
while (fileStream.Position < startPoint + chunkLength)
{
Polygon polygon;
UInt16 vertCount = binaryReader.ReadUInt16();
polygon.indices = new UInt16[vertCount];
polygon.uv = new Vector2[vertCount];
polygon.uvIndices = new int[vertCount];
for (int i = 0; i < vertCount; i++)
{
polygon.indices[i] = binaryReader.ReadUInt16();
}
polygon.surface = binaryReader.ReadInt16();
model.polygons.Add(polygon);
if (polygon.surface < 1)
{
Debug.WriteLine(" DETAIL POLYGONS FOUND");
}
}
}
else if (chunkType == "SURF")
{
Debug.WriteLine(chunkType + ", length " + chunkLength);
long startPoint = fileStream.Position;
List <char> chars = new List <char>();
bool hasFoundEnd = false;
while (!hasFoundEnd)
{
char currentChar = binaryReader.ReadChar();
if (currentChar == '\0')
{
hasFoundEnd = true;
}
else
{
chars.Add(currentChar);
}
}
string surfaceName = new string(chars.ToArray());
Debug.WriteLine(" SURF name: " + surfaceName);
// Padding
if (surfaceName.Length % 2 == 0)
{
binaryReader.ReadByte();
}
Surface currentSurface = null;
foreach (Surface surface in model.surfaces)
{
if (surface.name == surfaceName)
{
currentSurface = surface;
}
}
if (currentSurface == null)
{
Debug.WriteLine(" Couldn't find surface named " + surfaceName);
}
// now check the sub-chunks
while (fileStream.Position < startPoint + chunkLength)
{
ReadSurfChunk(fileStream, binaryReader, currentSurface);
}
}
else
{
Debug.WriteLine("Unknown chunk type: " + chunkType + ", length " + chunkLength);
fileStream.Seek(chunkLength, SeekOrigin.Current);
}
}
void ReadSurfChunk(FileStream fileStream, BinaryReader binaryReader, Surface surface)
{
string chunkType = new string(binaryReader.ReadChars(4));
int chunkLength = (int)binaryReader.ReadUInt16();
if (chunkType == "COLR")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
int r = (int)binaryReader.ReadByte();
int g = (int)binaryReader.ReadByte();
int b = (int)binaryReader.ReadByte();
surface.color = Color.FromArgb(r, g, b);
binaryReader.ReadByte(); // usually 00, supposedly unused/unread, but the lightwave 8 exporter seems to do FF instead? whatever
}
else if (chunkType == "FLAG")
{
// SURFACE FLAGS
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.surfaceFlags = (SurfaceFlags)binaryReader.ReadUInt16();
Debug.WriteLine(" Surface Flags: "+ surface.surfaceFlags);
}
else if (chunkType == "LUMI")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.luminosity = binaryReader.ReadUInt16();
Debug.WriteLine(" Luminosity: "+ surface.luminosity);
}
else if (chunkType == "DIFF")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.diffuse = binaryReader.ReadUInt16();
Debug.WriteLine(" Diffuse: "+ surface.diffuse);
}
else if (chunkType == "SPEC")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.specularity = binaryReader.ReadUInt16();
Debug.WriteLine(" Specularity: "+ surface.specularity);
}
else if (chunkType == "GLOS")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.glossiness = binaryReader.ReadUInt16();
Debug.WriteLine(" Glossiness: "+ surface.glossiness);
}
else if (chunkType == "REFL")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.reflection = binaryReader.ReadUInt16();
Debug.WriteLine(" Reflection: "+ surface.reflection);
}
else if (chunkType == "TRAN")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
surface.transparency = binaryReader.ReadUInt16();
Debug.WriteLine(" Transparency: "+ surface.transparency);
}
else if (chunkType == "CTEX" || chunkType == "LTEX" || chunkType == "DTEX" || chunkType == "STEX" || chunkType == "RTEX" || chunkType == "TTEX" || chunkType == "BTEX")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
currentTextureType = chunkType;
fileStream.Seek(chunkLength, SeekOrigin.Current);
}
else if (chunkType == "TIMG")
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
if (currentTextureType != "CTEX")
{
fileStream.Seek(chunkLength, SeekOrigin.Current);
return;
}
List <char> chars = new List <char>();
bool hasFoundEnd = false;
while (!hasFoundEnd)
{
char currentChar = binaryReader.ReadChar();
if (currentChar == '\0')
{
hasFoundEnd = true;
}
else
{
chars.Add(currentChar);
}
}
string texturePath = new string(chars.ToArray());
// Padding
if (texturePath.Length % 2 == 0)
{
binaryReader.ReadByte();
}
Debug.WriteLine(" TIMG path: "+ texturePath);
if (texturePath != "(none)")
{
surface.colorTextureImage = texturePath;
}
}
else if (chunkType == "TFLG")
{
// TEXTURE FLAGS
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
if (currentTextureType != "CTEX")
{
fileStream.Seek(chunkLength, SeekOrigin.Current);
return;
}
surface.colorTextureFlags = (TextureFlags)binaryReader.ReadUInt16();
Debug.WriteLine(" Texture Flags: "+ surface.colorTextureFlags);
}
else if (chunkType == "TSIZ")
{
// TEXTURE SIZE
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
if (currentTextureType != "CTEX")
{
fileStream.Seek(chunkLength, SeekOrigin.Current);
return;
}
surface.colorTextureSize = new Vector3(binaryReader.ReadSingle(), binaryReader.ReadSingle(), binaryReader.ReadSingle());
Debug.WriteLine(" Texture Size: "+ surface.colorTextureSize);
}
else if (chunkType == "TCTR")
{
// TEXTURE CENTER
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength);
if (currentTextureType != "CTEX")
{
fileStream.Seek(chunkLength, SeekOrigin.Current);
return;
}
surface.colorTextureCenter = new Vector3(binaryReader.ReadSingle(), binaryReader.ReadSingle(), binaryReader.ReadSingle());
Debug.WriteLine(" Texture Center: "+ surface.colorTextureCenter);
}
else
{
Debug.WriteLine(" "+ chunkType + ", length " + chunkLength + ", UNHANDLED SURF SUB-CHUNK TYPE");
fileStream.Seek(chunkLength, SeekOrigin.Current);
}
}
