public static BRDF parseBRDF(InputStream inputFile, Scene scene)
{
BRDF result;
KeywordEnum key = inputFile.expectKeywords(new List <KeywordEnum>()
{
KeywordEnum.Diffuse, KeywordEnum.Specular
});
inputFile.expectSymbol("(");
IPigment pigment = parsePigment(inputFile, scene);
inputFile.expectSymbol(")");
if (key == KeywordEnum.Diffuse)
{
result = new DiffuseBRDF(pigment);
}
else if (key == KeywordEnum.Specular)
{
result = new SpecularBRDF(pigment);
}
else
{
throw new GrammarError(inputFile.location, "This line should be unreachable");
}
return(result);
}
public static Tuple <string, Material> parseMaterial(InputStream inputFile, Scene scene)
{
string name = inputFile.expectIdentifier();
inputFile.expectSymbol("(");
BRDF brdf = parseBRDF(inputFile, scene);
inputFile.expectSymbol(",");
IPigment emRad = parsePigment(inputFile, scene);
inputFile.expectSymbol(")");
return(new Tuple <string, Material>(name, new Material(brdf, emRad)));
}
public Material(BRDF? Brdf = null, IPigment? EmittedRadiance = null)
{
this.brdf = Brdf ?? new DiffuseBRDF();
this.emittedRadiance = EmittedRadiance ?? new UniformPigment(Constant.Black);
}
public BRDF(IPigment? pig = null)
{
this.pigment = pig ?? new UniformPigment(Constant.White);
}