private static ThreeDSFileData ReadEDIT3DS(FileStream file, Chunk thischunk)
{
ThreeDSFileData data = new ThreeDSFileData();
uint bytesRead = 6;
while (bytesRead < thischunk.length)
{
Chunk chunk = ReadChunk(file);
switch ((ChunkCodes)chunk.ID)
{
case ChunkCodes.BLANK:
break;
case ChunkCodes.NAMED_OBJECT:
data.objects.Add(ReadNAMED_OBJECT(file, chunk));
break;
case ChunkCodes.MATERIAL:
data.materials.Add(ReadMATERIAL(file, chunk));
break;
default:
file.Seek(chunk.length - 6, SeekOrigin.Current);
break;
}
bytesRead += chunk.length;
}
return(data);
}
public static ThreeDSFileData ParseFile(string filename)
{
FileStream file = new FileStream(filename, FileMode.Open);
Chunk first = ReadChunk(file);
// Check file
if (first.ID != (ushort)ChunkCodes.PRIMARY)
{
throw new Exception("Not a valid 3ds file");
}
ThreeDSFileData data = null;
// Read top level
uint bytesRead = 6;
while (bytesRead < first.length)
{
Chunk chunk = ReadChunk(file);
switch ((ChunkCodes)chunk.ID)
{
case ChunkCodes.BLANK:
break;
case ChunkCodes.EDIT3DS:
data = ReadEDIT3DS(file, chunk);
break;
/*case ChunkCodes.KEYF3DS:
* ReadKEYF3DS(file, chunk);
* break;*/
default:
file.Seek(chunk.length - 6, SeekOrigin.Current);
break;
}
if (chunk.length == 0)
{
break;
}
bytesRead += chunk.length;
}
file.Close();
return(data);
}
private static void Parse3DSData(DataReader3DS dataSegment, ThreeDSFileData file)
{
DataReader3DS subSegment = dataSegment.GetNextSubSegment();
while (subSegment != null)
{
switch ((ChunkCodes)subSegment.Tag)
{
case ChunkCodes.MATERIAL:
file.materials.Add(ParseMaterialData(subSegment));
break;
case ChunkCodes.NAMED_OBJECT:
file.objects.Add(ParseMeshData(subSegment));
break;
default:
break;
}
subSegment = dataSegment.GetNextSubSegment();
}
}
static ThreeDSFileData ParseFromData(DataReader3DS data)
{
DataReader3DS dataSubSegment = null;
if ((ChunkCodes)data.Tag == ChunkCodes.PRIMARY)
{
dataSubSegment = data.GetNextSubSegment();
}
else
{
return(null);
}
ThreeDSFileData file = new ThreeDSFileData();
while (dataSubSegment != null)
{
// Check the tag to see what sort of data is in this subsegment (or "chunk")
switch ((ChunkCodes)dataSubSegment.Tag)
{
case ChunkCodes.VERSION:
file.version = dataSubSegment.GetUShort();
break;
case ChunkCodes.EDIT3DS:
Parse3DSData(dataSubSegment, file);
break;
default:
break;
}
dataSubSegment = data.GetNextSubSegment();
}
return(file);
}
static ThreeDSFileData ParseFromData(DataReader3DS data)
{
DataReader3DS dataSubSegment = null;
if ((ChunkCodes)data.Tag == ChunkCodes.PRIMARY)
{
dataSubSegment = data.GetNextSubSegment();
}
else
return null;
ThreeDSFileData file = new ThreeDSFileData();
while (dataSubSegment != null)
{
// Check the tag to see what sort of data is in this subsegment (or "chunk")
switch ((ChunkCodes)dataSubSegment.Tag)
{
case ChunkCodes.VERSION:
file.version = dataSubSegment.GetUShort();
break;
case ChunkCodes.EDIT3DS:
Parse3DSData(dataSubSegment, file);
break;
default:
break;
}
dataSubSegment = data.GetNextSubSegment();
}
return file;
}
private static void Parse3DSData(DataReader3DS dataSegment, ThreeDSFileData file)
{
DataReader3DS subSegment = dataSegment.GetNextSubSegment();
while (subSegment != null)
{
switch ((ChunkCodes)subSegment.Tag)
{
case ChunkCodes.MATERIAL:
file.materials.Add(ParseMaterialData(subSegment));
break;
case ChunkCodes.NAMED_OBJECT:
file.objects.Add(ParseMeshData(subSegment));
break;
default:
break;
}
subSegment = dataSegment.GetNextSubSegment();
}
}
public ABScene3D LoadScene(string file)
{
string path = file.Substring(0, file.Length - Path.GetFileName(file).Length);
// parse file into 3ds structures
ThreeDSFileData data = ThreeDSParser.ParseFromFile(file);
// convert to AB
ABScene3D scene = new ABScene3D();
ABMaterial[] materials = null;
if (data.materials != null && data.materials.Count > 0)
{
materials = new ABMaterial[data.materials.Count];
for (int mIdx = 0; mIdx < data.materials.Count; mIdx++)
{
ABMaterial material = materials[mIdx] = new ABMaterial();
material.Name = data.materials[mIdx].name;
material.Ambient = new ABColorARGB();
material.Ambient.A = 255;
material.Ambient.R = data.materials[mIdx].ambient.r;
material.Ambient.G = data.materials[mIdx].ambient.g;
material.Ambient.B = data.materials[mIdx].ambient.b;
material.Diffuse = new ABColorARGB();
material.Diffuse.A = 255;
material.Diffuse.R = data.materials[mIdx].diffuse.r;
material.Diffuse.G = data.materials[mIdx].diffuse.g;
material.Diffuse.B = data.materials[mIdx].diffuse.b;
// convert to absolute path
if (data.materials[mIdx].texture == null || Path.IsPathRooted(data.materials[mIdx].texture))
{
material.TextureName = data.materials[mIdx].texture;
}
else
{
material.TextureName = path + data.materials[mIdx].texture;
}
// match file
if (material.TextureName != null)
{
string filename = Path.GetFileNameWithoutExtension(material.TextureName).ToLower();
string ext = Path.GetExtension(material.TextureName).ToLower();
string[] files = Directory.GetFiles(path);
foreach (string fn in files)
{
string fno = Path.GetFileNameWithoutExtension(fn).ToLower();
if (fno.StartsWith(filename) && Path.GetExtension(fn).ToLower() == ext)
{
material.TextureName = fn;
break;
}
}
}
}
}
int numMeshes = data.GetNumFaceGroups();
if (numMeshes > 0)
{
scene.Models = new ABModel3D[numMeshes];
int meshIdx = 0;
foreach (ThreeDSObject obj in data.objects)
{
foreach (ThreeDSMesh mesh in obj.meshes)
{
scene.Models[meshIdx++] = ConvertMesh(mesh, materials);
}
}
}
return(scene);
}
