public static ObjMaterialFile FromStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var mtl = new ObjMaterialFile();
ObjMaterial currentMaterial = null;
foreach (var values in LineReader.Read(stream))
{
switch (values[0].ToLowerInvariant())
{
case "newmtl":
if (values.Length < 2)
{
throw new InvalidDataException("A newmtl statement must specify a name.");
}
if (values.Length != 2)
{
throw new InvalidDataException("A newmtl statement has too many values.");
}
currentMaterial = new ObjMaterial
{
Name = values[1]
};
mtl.Materials.Add(currentMaterial);
break;
case "ka":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.AmbientColor = ObjMaterialFileReader.ParseMaterialColor("Ka", values);
break;
case "kd":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.DiffuseColor = ObjMaterialFileReader.ParseMaterialColor("Kd", values);
break;
case "ke":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.EmissiveColor = ObjMaterialFileReader.ParseMaterialColor("Ke", values);
break;
case "ks":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.SpecularColor = ObjMaterialFileReader.ParseMaterialColor("Ks", values);
break;
case "tf":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.TransmissionColor = ObjMaterialFileReader.ParseMaterialColor("Tf", values);
break;
case "illum":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("An illum statement must specify an illumination model.");
}
if (values.Length != 2)
{
throw new InvalidDataException("An illum statement has too many values.");
}
currentMaterial.IlluminationModel = int.Parse(values[1], CultureInfo.InvariantCulture);
break;
case "d":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("A d statement must specify a factor.");
}
if (string.Equals(values[1], "-halo", StringComparison.OrdinalIgnoreCase))
{
if (values.Length < 3)
{
throw new InvalidDataException("A d statement must specify a factor.");
}
if (values.Length != 3)
{
throw new InvalidDataException("A d statement has too many values.");
}
currentMaterial.IsHaloDissolve = true;
currentMaterial.DissolveFactor = float.Parse(values[2], CultureInfo.InvariantCulture);
}
else
{
if (values.Length != 2)
{
throw new InvalidDataException("A d statement has too many values.");
}
currentMaterial.DissolveFactor = float.Parse(values[1], CultureInfo.InvariantCulture);
}
break;
case "ns":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("A Ns statement must specify a specular exponent.");
}
if (values.Length != 2)
{
throw new InvalidDataException("A Ns statement has too many values.");
}
currentMaterial.SpecularExponent = float.Parse(values[1], CultureInfo.InvariantCulture);
break;
case "sharpness":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("A sharpness statement must specify a sharpness value.");
}
if (values.Length != 2)
{
throw new InvalidDataException("A sharpness statement has too many values.");
}
currentMaterial.Sharpness = int.Parse(values[1], CultureInfo.InvariantCulture);
break;
case "ni":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("A Ni statement must specify an optical density.");
}
if (values.Length != 2)
{
throw new InvalidDataException("A Ni statement has too many values.");
}
currentMaterial.OpticalDensity = float.Parse(values[1], CultureInfo.InvariantCulture);
break;
case "map_aat":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 2)
{
throw new InvalidDataException("A map_aat statement must specify a value.");
}
if (values.Length != 2)
{
throw new InvalidDataException("A map_aat statement has too many values.");
}
if (string.Equals(values[1], "on", StringComparison.OrdinalIgnoreCase))
{
currentMaterial.IsAntiAliasingEnabled = true;
}
else if (string.Equals(values[1], "off", StringComparison.OrdinalIgnoreCase))
{
currentMaterial.IsAntiAliasingEnabled = false;
}
else
{
throw new InvalidDataException("A map_aat statement must specify on or off.");
}
break;
case "map_ka":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.AmbientMap = ObjMaterialFileReader.ParseMaterialMap("map_Ka", values);
break;
case "map_kd":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.DiffuseMap = ObjMaterialFileReader.ParseMaterialMap("map_Kd", values);
break;
case "map_ke":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.EmissiveMap = ObjMaterialFileReader.ParseMaterialMap("map_Ke", values);
break;
case "map_ks":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.SpecularMap = ObjMaterialFileReader.ParseMaterialMap("map_Ks", values);
break;
case "map_ns":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.SpecularExponentMap = ObjMaterialFileReader.ParseMaterialMap("map_Ns", values);
break;
case "map_d":
case "map_tr":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.DissolveMap = ObjMaterialFileReader.ParseMaterialMap("map_d", values);
break;
case "decal":
case "map_decal":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.DecalMap = ObjMaterialFileReader.ParseMaterialMap("decal", values);
break;
case "disp":
case "map_disp":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.DispMap = ObjMaterialFileReader.ParseMaterialMap("disp", values);
break;
case "bump":
case "map_bump":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
currentMaterial.BumpMap = ObjMaterialFileReader.ParseMaterialMap("bump", values);
break;
case "refl":
case "map_refl":
if (currentMaterial == null)
{
throw new InvalidDataException("The material name is not specified.");
}
if (values.Length < 4)
{
throw new InvalidDataException("A refl statement must specify a type and a file name.");
}
if (!string.Equals(values[1], "-type", StringComparison.OrdinalIgnoreCase))
{
throw new InvalidDataException("A refl statement must specify a type.");
}
switch (values[2].ToLowerInvariant())
{
case "sphere":
currentMaterial.ReflectionMap.Sphere = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_top":
currentMaterial.ReflectionMap.CubeTop = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_bottom":
currentMaterial.ReflectionMap.CubeBottom = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_front":
currentMaterial.ReflectionMap.CubeFront = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_back":
currentMaterial.ReflectionMap.CubeBack = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_left":
currentMaterial.ReflectionMap.CubeLeft = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
case "cube_right":
currentMaterial.ReflectionMap.CubeRight = ObjMaterialFileReader.ParseMaterialMap("refl", values);
break;
}
break;
}
}
return(mtl);
}
