public static Stream LoadFromResources(string resource)
{
return(ManifestResourceManager.LoadResource($"Resources/{resource}"));
}
public static async Task <GeometricShape> Load(string model)
{
var positions = new List <vec3>(1024);
var color = new vec3(232 / 255f, 176 / 255f, 141 / 255f);
var normals = new List <vec3>(1024);
var vertices = new List <vertex>(1024);
var indices = new List <ushort>(1024);
var cache = new Dictionary <string, ushort>();
using (var stream = ManifestResourceManager.LoadResource($"Resources/{model}.obj"))
{
using (var reader = new StreamReader(stream))
{
while (!reader.EndOfStream)
{
var line = await reader.ReadLineAsync();
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
if (line[0] == '#')
{
continue;
}
if (line.StartsWith("mtllib"))
{
continue;
}
if (line[0] == 'o')
{
continue;
}
if (line.StartsWith("usemtl"))
{
continue;
}
if (line[0] == 's')
{
continue;
}
switch (line[0])
{
case 'v':
{
var pieces = line.Split(' ');
var vector = new vec3
(
Convert.ToSingle(pieces[1], CultureInfo.InvariantCulture),
Convert.ToSingle(pieces[2], CultureInfo.InvariantCulture),
pieces.Length > 3 ?
Convert.ToSingle(pieces[3], CultureInfo.InvariantCulture)
:
0.0f
);
switch (line[1])
{
case ' ': positions.Add(vector); break;
case 'n': normals.Add(vector); break;
case 't': /* DoSomething(vector); */ break;
default: break;
}
}
break;
case 'f':
{
var pieces = line.Split(' ');
void UseVertex(string vertex)
{
var data = vertex.Split('/');
var pos = Convert.ToInt32(data[0]) - 1;
var tex = Convert.ToInt32(data[1]) - 1;
var nor = Convert.ToInt32(data[2]) - 1;
var vert = new vertex(positions[pos], color, normals[nor]);
var desc = vert.ToString();
if (cache.TryGetValue(desc, out ushort index))
{
indices.Add(index);
}
else
{
index = (ushort)vertices.Count;
vertices.Add(vert);
indices.Add(index);
cache.Add(desc, index);
}
}
UseVertex(pieces[1]);
UseVertex(pieces[2]);
UseVertex(pieces[3]);
}
break;
default: break;
}
}
}
}
return(new GeometricShape(new ShapeData(vertices.ToArray(), indices.ToArray())));
}