internal ObjObjectUnsafe(ref ObjObjectCore core)
{
_core = core;
core = default;
}
private static bool TryParseFLine(ReadOnlySpan <byte> str, ref ObjObjectCore core)
{
// <pos_i>/<uv_i>/<normal_i> <pos_i>/<uv_i>/<normal_i> <pos_i>/<uv_i>/<normal_i> ...
FaceData v0;
FaceData v1;
FaceData v2;
var splits = str.Split((byte)' ', StringSplitOptions.RemoveEmptyEntries);
using (var e = splits.GetEnumerator()) {
int pos;
int?uv;
int?normal;
if (e.MoveNext() == false)
{
return(false);
}
if (TryParseFace(e.Current, out pos, out uv, out normal) == false)
{
return(false);
}
v0 = new(pos, uv, normal);
if (e.MoveNext() == false)
{
return(false);
}
if (TryParseFace(e.Current, out pos, out uv, out normal) == false)
{
return(false);
}
v1 = new(pos, uv, normal);
if (e.MoveNext() == false)
{
return(false);
}
if (TryParseFace(e.Current, out pos, out uv, out normal) == false)
{
return(false);
}
v2 = new(pos, uv, normal);
if (TryAdd(ref core, v0, v1, v2) == false)
{
return(false);
}
while (e.MoveNext())
{
v1 = v2;
if (TryParseFace(e.Current, out pos, out uv, out normal) == false)
{
return(false);
}
v2 = new(pos, uv, normal);
if (TryAdd(ref core, v0, v1, v2) == false)
{
return(false);
}
}
}
return(true);
static bool TryAdd(ref ObjObjectCore core, in FaceData v0, in FaceData v1, in FaceData v2)
private static bool TryParsePrivate(ReadOnlySpan <byte> text, out ObjObjectCore obj)
{
ObjObjectCore core = default;
try {
core = new ObjObjectCore();
var lines = text.Lines();
foreach (Utf8Reader lineReader in lines)
{
if (lineReader.MoveIfMatch((byte)'#'))
{
continue;
}
else if (lineReader.MoveIfMatch((byte)'v', (byte)' '))
{
if (TryParseVector3(lineReader.Current, out var pos) == false)
{
goto FAILURE;
}
core.Positions.Add(pos);
}
else if (lineReader.MoveIfMatch((byte)'v', (byte)'t', (byte)' '))
{
if (TryParseVector2(lineReader.Current, out var uv) == false)
{
goto FAILURE;
}
core.UVs.Add(uv);
}
else if (lineReader.MoveIfMatch((byte)'v', (byte)'n', (byte)' '))
{
if (TryParseVector3(lineReader.Current, out var normal) == false)
{
goto FAILURE;
}
core.Normals.Add(normal);
}
else if (lineReader.MoveIfMatch((byte)'f', (byte)' '))
{
if (TryParseFLine(lineReader.Current, ref core) == false)
{
goto FAILURE;
}
}
else
{
continue;
}
}
obj = core;
return(true);
FAILURE:
obj = default;
return(false);
}
catch {
core.Dispose();
obj = default;
return(false);
}
}
