private static GeometryData GenerateGeometryDataFromAssimpMesh(Assimp.Mesh mesh)
{
var geometryData = new GeometryData
{
Vertices = new VertexPositionNormalTexture[mesh.VertexCount],
Indices = new ushort[mesh.FaceCount * 3]
};
geometryData.Vertices = new VertexPositionNormalTexture[mesh.VertexCount];
for (var i = 0; i < mesh.VertexCount; i++)
{
var vertex = mesh.Vertices[i];
geometryData.Vertices[i].Position = new Vector3(vertex.X, vertex.Y, vertex.Z);
var normal = mesh.HasNormals ? mesh.Normals[i] : new Vector3D();
geometryData.Vertices[i].Normal = new Vector3(normal.X, normal.Y, normal.Z);
var texcoord = mesh.HasTextureCoords(0) ? mesh.TextureCoordinateChannels[0][i] : new Vector3D();
geometryData.Vertices[i].TextureCoordinate = new Vector2(texcoord.X, texcoord.Y);
}
for (var i = 0; i < mesh.FaceCount; i++)
{
geometryData.Indices[i * 3 + 0] = (ushort)mesh.Faces[i].Indices[0];
geometryData.Indices[i * 3 + 1] = (ushort)mesh.Faces[i].Indices[1];
geometryData.Indices[i * 3 + 2] = (ushort)mesh.Faces[i].Indices[2];
}
return(geometryData);
}