
plmeshc: Magnitude colored plot surface mesh with contour. 

DESCRIPTION:

	Identical to plmesh but with extra functionalities: the surface mesh
	can be colored accordingly to the current z value being plotted, a
	contour plot can be drawn at the base XY plane, and a curtain can be
	drawn between the plotted function border and the base XY plane. 

SYNOPSIS:

plmeshc(x, y, z, nx, ny, opt, clevel, nlevel)

ARGUMENTS:

    x (PLFLT *, input) :    Pointer to set of x coordinate values at which
        the function is evaluated. 

    y (PLFLT *, input) :    Pointer to set of y coordinate values at which
        the function is evaluated. 

    z (PLFLT **, input) :     Pointer to a vectored two-dimensional array
        with set of function values. 

    nx (PLINT, input) :    Number of x values at which function is
        evaluated. 

    ny (PLINT, input) :    Number of y values at which function is
        evaluated. 

    opt (PLINT, input) :    Determines the way in which the surface is
        represented. To specify more than one option just add the options,
        e.g. DRAW_LINEXY + MAG_COLOR opt=DRAW_LINEX: Lines are drawn
        showing z as a function of x for each value of y[j]. 
            opt=DRAW_LINEY: Lines are drawn showing z as a function of y
            for each value of x[i]. 
            opt=DRAW_LINEXY: Network of lines is drawn connecting points
            at which function is defined. 
            opt=MAG_COLOR: Each line in the mesh is colored according to
            the z value being plotted. The    color is used from the current
            colormap 1. 
            opt=BASE_CONT: A contour plot is drawn at the base XY plane
            using parameters  
    nlevel and 
    clevel. 
            opt=DRAW_SIDES: draws a curtain between the base XY plane and
            the borders of the plotted function. 


    clevel (PLFLT *, input) :     Pointer to the array that defines the
        contour level spacing. evaluated. 

    nlevel (PLINT, input) :    Number of elements in the clevel array. 
