private static Attach FromNoWeight(Mesh mesh)
{
List <BufferMesh> result = new(mesh.Primitives.Count);
IColorConverter <LinearRGBColor, RGBColor> converter
= new ConverterBuilder().FromLinearRGB().ToRGB(RGBWorkingSpaces.sRGB).Build();
foreach (var primitive in mesh.Primitives)
{
// read vertices
primitive.VertexAccessors.TryGetValue("POSITION", out Accessor positions);
primitive.VertexAccessors.TryGetValue("NORMAL", out Accessor normals);
var positionArray = positions.AsVector3Array();
var normalArray = normals?.AsVector3Array();
BufferVertex[] vertices = new BufferVertex[positionArray.Count];
for (int i = 0; i < vertices.Length; i++)
{
var pos = positionArray[i];
var nrm = normalArray?[i] ?? Vector3.UnitY;
vertices[i] = new(pos, nrm, (ushort)i);
}
// read corners
primitive.VertexAccessors.TryGetValue("TEXCOORD_0", out Accessor uvs);
primitive.VertexAccessors.TryGetValue("COLOR_0", out Accessor colors);
var uvArray = uvs?.AsVector2Array();
var colorArray = colors?.AsColorArray();
BufferCorner[] corners = new BufferCorner[vertices.Length];
for (int i = 0; i < corners.Length; i++)
{
Vector2 uv = uvArray?[i] ?? default;
Vector4 col = colorArray?[i] ?? Vector4.UnitW;
var linearCol = converter.Convert(new(col.X, col.Y, col.Z));
corners[i] = new((ushort)i, new((float)linearCol.R, (float)linearCol.G, (float)linearCol.B, col.W), uv);
}
// Read indices
uint[] indices = GetIndices(primitive.IndexAccessor, positions.Count, primitive.DrawPrimitiveType);
// convert material
result.Add(new(vertices, false, corners, indices, GetMaterial(primitive.Material)));
}
Attach atc = new(result.ToArray());
atc.Name = mesh.Name;
return(atc);
}
public CachedVertex(BufferVertex vtx)
{
position = new(vtx.Position, 1);
normal = vtx.Normal;
}