private static PlyResult ParseBinaryLittleEndian(byte[] content, PlyHeader header)
{
PlyResult plyResult = new PlyResult();
plyResult.meshName = header.GlobalMeshInfoElement.GetName();
plyResult.meshColor = header.GloablMaterialElement.GetColor();
var headerAsText = header.RawHeader.Aggregate((a, b) => $"{a}\n{b}") + "\n";
var headerAsBytes = Encoding.ASCII.GetBytes(headerAsText);
var withoutHeader = content.Skip(headerAsBytes.Length).ToArray();
int bytesUsed;
header.VertexElement.ParseElementBinaryLittleEndian(withoutHeader, out bytesUsed, out plyResult.vertices, out plyResult.normals, out plyResult.colors);
int bytesOffset = bytesUsed;
header.FaceElement.ParseElementBinaryLittleEndian(withoutHeader, bytesOffset, out bytesUsed, out plyResult.triangles);
bytesOffset = bytesOffset + bytesUsed;
header.LineElement.ParseElementBinaryLittleEndian(withoutHeader, bytesOffset, out bytesUsed, out plyResult.lines);
bytesOffset = bytesOffset + bytesUsed;
header.LineColorElement.ParseElementBinaryLittleEndian(withoutHeader, bytesOffset, out bytesUsed, out plyResult.lineColors);
return(plyResult);
}
public static PlyResult GetResult(byte[] content)
{
PlyResult plyResult = null;
var header = GetHeader(content);
var headerParsed = new PlyHeader(header);
if (!headerParsed.VertexElement.IsValid ||
(!headerParsed.FaceElement.IsValid && !headerParsed.LineElement.IsValid))
{
return(null);
}
if (headerParsed.Format == PlyFormat.Ascii)
{
plyResult = ParseAscii(GetLines(content), headerParsed);
}
else if (headerParsed.Format == PlyFormat.BinaryLittleEndian)
{
plyResult = ParseBinaryLittleEndian(content, headerParsed);
}
else // todo: support BinaryBigEndian
{
return(null);
}
return(plyResult); // new PlyResult(mesh, headerParsed.GloablMaterialElement.GetColor());
}
private static PlyResult ParseAscii(List <string> plyFile, PlyHeader header)
{
PlyResult plyResult = new PlyResult();
plyResult.meshName = header.GlobalMeshInfoElement.GetName();
plyResult.meshColor = header.GloablMaterialElement.GetColor();
// TODO: order independent
var headerEndIndex = plyFile.IndexOf("end_header");
var vertexStartIndex = headerEndIndex + 1;
var faceStartIndex = vertexStartIndex + header.VertexElement.NElement;
var lineStartIndex = faceStartIndex + header.FaceElement.NElement;
var lineColorStartIndex = lineStartIndex + header.LineElement.NElement;
header.VertexElement.ParseElement(plyFile.GetRange(vertexStartIndex, header.VertexElement.NElement),
out plyResult.vertices, out plyResult.normals, out plyResult.colors);
header.FaceElement.ParseElement(plyFile.GetRange(faceStartIndex, header.FaceElement.NElement), out plyResult.triangles);
header.LineElement.ParseElement(plyFile.GetRange(lineStartIndex, header.LineElement.NElement), out plyResult.lines);
header.LineColorElement.ParseElement(plyFile.GetRange(lineColorStartIndex, header.LineColorElement.NElement), out plyResult.lineColors);
return(plyResult);
}
