public static string ExportAsObj(this TerrainFile @this, int offset, out int newOffset)
{
var triangles = @this.Triangulate();
var obj = new StringBuilder();
foreach (var triangle in triangles.SelectMany(t => t.ToArray))
{
obj.AppendLine($"v {triangle.X.ToString(CultureInfo.InvariantCulture)}" +
$" {triangle.Y.ToString(CultureInfo.InvariantCulture)}" +
$" {triangle.Z.ToString(CultureInfo.InvariantCulture)}"
);
}
for (var i = 0; i < triangles.Length; i++)
{
var index = i * 3 + 1 + offset;
obj.AppendLine($"f {index}//{index} {index + 1}//{index + 1} {index + 2}//{index + 2}");
}
newOffset = offset + triangles.Length * 3;
return(obj.ToString());
}
