private static void WriteColor(string statement, ObjMaterialColor color, StreamWriter stream)
{
stream.Write(statement);
if (color.IsSpectral)
{
stream.Write(" spectral ");
stream.Write(color.SpectralFileName);
if (color.SpectralFactor != 1.0f)
{
stream.Write(' ');
stream.Write(color.SpectralFactor.ToString("F6", CultureInfo.InvariantCulture));
}
stream.WriteLine();
}
else
{
if (color.UseXYZColorSpace)
{
stream.Write(" xyz");
}
stream.WriteLine(
" {0} {1} {2}",
color.Color.X.ToString("F6", CultureInfo.InvariantCulture),
color.Color.Y.ToString("F6", CultureInfo.InvariantCulture),
color.Color.Z.ToString("F6", CultureInfo.InvariantCulture));
}
}
private static ObjMaterialColor ParseMaterialColor(string statement, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Concat("A ", statement, " statement must specify a color."));
}
var color = new ObjMaterialColor();
int index = 1;
switch (values[1].ToLowerInvariant())
{
case "spectral":
index++;
if (values.Length - index < 1)
{
throw new InvalidDataException(string.Concat("A ", statement, " spectral statement must specify a file name."));
}
if (!Path.HasExtension(values[index]))
{
throw new InvalidDataException("A filename must have an extension.");
}
color.SpectralFileName = values[index];
index++;
if (values.Length > index)
{
color.SpectralFactor = float.Parse(values[index], CultureInfo.InvariantCulture);
index++;
}
break;
case "xyz":
index++;
if (values.Length - index < 1)
{
throw new InvalidDataException(string.Concat("A ", statement, " xyz statement must specify a color."));
}
color.UseXYZColorSpace = true;
var xyz = new ObjVector3();
xyz.X = float.Parse(values[index], CultureInfo.InvariantCulture);
index++;
if (values.Length > index)
{
if (values.Length - index < 2)
{
throw new InvalidDataException(string.Concat("A ", statement, " xyz statement must specify a XYZ color."));
}
xyz.Y = float.Parse(values[index], CultureInfo.InvariantCulture);
xyz.Z = float.Parse(values[index + 1], CultureInfo.InvariantCulture);
index += 2;
}
else
{
xyz.Y = xyz.X;
xyz.Z = xyz.X;
}
color.Color = xyz;
break;
default:
var rgb = new ObjVector3();
rgb.X = float.Parse(values[index], CultureInfo.InvariantCulture);
index++;
if (values.Length > index)
{
if (values.Length - index < 2)
{
throw new InvalidDataException(string.Concat("A ", statement, " statement must specify a RGB color."));
}
rgb.Y = float.Parse(values[index], CultureInfo.InvariantCulture);
rgb.Z = float.Parse(values[index + 1], CultureInfo.InvariantCulture);
index += 2;
}
else
{
rgb.Y = rgb.X;
rgb.Z = rgb.X;
}
color.Color = rgb;
break;
}
if (index != values.Length)
{
throw new InvalidDataException(string.Concat("A ", statement, " statement has too many values."));
}
return(color);
}