How can i create constant in a .m archive and use it for the creation of new objects?

Hi, I have an archive named Constantes.m

%%  Logica
    TRUE=1;
    FALSE=0;
%%  Colores
    AZUL=[0 0 1];
    ROJO=[1 0 0];
    BLANCO=[1 1 1];
%%  Tablero
    COLUMNAS=8;
    FILAS=8;  
%%  Juego
    TURNO_IA=[1 0 0];
    TURNO_JUGADOR=[0 0 1];

And i want to use those variables into my class archives, for example

    classdef  Pieza

    properties 
        Color=BLANCO;
        Rey=FALSE;
        Direccion=0;
    end

    methods 

        function obj = Pieza(Color,ColorDeJugador)
            %Constructor de Pieza (Color, Color Elegido)

                obj.Color=Color;
                Rey=FALSE;
                if isequal(Color,ColorDeJugador)
                    Direccion=-1;
                elseif isequal(Color,BLANCO);
                    Direccion=0;
                else
                    Direccion=1;
                end

        end

        function obj = Coronar(obj)
             %Parametro del objeto Pieza Rey a 1(verdadero)
            obj.Rey=TRUE;
        end

    end

    end
    
    

how is it done?

Thanks

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/matlab_oop/properties-with-constant-values.html and note https://www.mathworks.com/help/matlab/matlab_oop/properties-with-constant-values.html#bso_zpq-5

Alternatives: https://www.mathworks.com/matlabcentral/answers/98309-is-it-possible-to-create-constant-variables-in-matlab

Answer 2

[Rik]

You could turn your script into a function. If you store all variables as fields of a struct you can use something like this to select a variable:

Color=getConstant('BLANCO');

In getConstant.m:

output=constants.(input);

This way you can even take advantage of persistent variables to generate the struct only once.