lwpoint_get_ordinate()

double lwpoint_get_ordinate ( const POINT4D *  p, char  ordinate  )

inline

Given a POINT4D and an ordinate number, return the value of the ordinate.

Parameters

p	input point
ordinate	number (1=x, 2=y, 3=z, 4=m)

Returns

d value at that ordinate

Definition at line 255 of file lwlinearreferencing.c.

{
        if (!p)
        {
                lwerror("Null input geometry.");
                return 0.0;
        }
 
        switch (ordinate)
        {
        case 'X':
                return p->x;
        case 'Y':
                return p->y;
        case 'Z':
                return p->z;
        case 'M':
                return p->m;
        }
        lwerror("Cannot extract %c ordinate.", ordinate);
        return 0.0;
}

References lwerror(), POINT4D::m, POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by lwline_clip_to_ordinate_range(), lwmpoint_clip_to_ordinate_range(), lwpoint_clip_to_ordinate_range(), point_interpolate(), ptarray_clamp_to_ordinate_range(), and test_lwpoint_get_ordinate().

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