public VirtualGroupGeometryComponent(PartGeometry3D part)
{
this.PartGeometry = part;
Positions = part.Positions.ToImmutableArray();
Normals = part.Positions.ToArray().CalculateNormals(part.Indices.ToArray()).ToImmutableArray();
Indices = part.Indices.ToImmutableArray();
colors = ImmutableArray <Vector4> .Empty;
}
public void Read(Stream stream)
{
meshes = new Dictionary <string, PartGeometry3D>();
var group = new ReadOnlySpan <char>(new[] { 'g' });
var vector = new ReadOnlySpan <char>(new[] { 'v' });
var texture = new ReadOnlySpan <char>(new[] { 'v', 't' });
var face = new ReadOnlySpan <char>(new[] { 'f' });
var comm = new ReadOnlySpan <char>(new[] { '#' });
//Memory<byte> buffer = new Memory<byte>();
var groupname = "noname";
PartGeometry3D current = FullGeometry.CreatePart(groupname);
using (var reader = new StreamReader(stream)) {
while (!reader.EndOfStream)
{
var span = reader.ReadLine().AsSpan();
if (span.StartsWith(comm) || span.IsWhiteSpace())
{
continue;
}
var part = span.Slice(2, span.Length - 2).Trim();
if (span.StartsWith(group))
{
var names = part.Trim().ToString().SplitOnWhitespace();
groupname = string.Join(" ", names); //[0].ToString();
var key = string.Join(" ", names.Take(names.Length - 1)); //[0].ToString();
current = FullGeometry.CreatePart(groupname);
}
else if (span.StartsWith(texture))
{
}
else if (span.StartsWith(vector))
{
try {
var val = SplitFloat(part, ' ');
var v = new Vector3(val[0], val[1], val[2]);
FullGeometry1.Positions.Add(v);
current.AddPosition(ref v);
}catch (Exception ex) {
ex.ToString();
}
}
else if (span.StartsWith(face))
{
var val = SplitInt(part, ' ');
if (new HashSet <int>(val).Count != 3)
{
}
FullGeometry1.Indices.AddRange(val);
try {
current.AddTriangle(val);
}catch (Exception ex) {
//TODO collect info for displaing in output
}
}
}
}
}
