ptarray_set_effective_area()

static POINTARRAY* ptarray_set_effective_area ( POINTARRAY *  inpts, int  avoid_collaps, int  set_area, double  trshld  )

static

Definition at line 402 of file effectivearea.c.

{
        LWDEBUG(2, "Entered  ptarray_set_effective_area");
        uint32_t p;
        POINT4D pt;
        EFFECTIVE_AREAS *ea;
        POINTARRAY *opts;
        int set_m;
        if(set_area)
                set_m=1;
        else
                set_m=FLAGS_GET_M(inpts->flags);
        ea=initiate_effectivearea(inpts);
 
        opts = ptarray_construct_empty(FLAGS_GET_Z(inpts->flags), set_m, inpts->npoints);
 
        ptarray_calc_areas(ea,avoid_collaps,set_area,trshld);
 
        if(set_area)
        {
                /*Only return points with an effective area above the threshold*/
                for (p=0;p<ea->inpts->npoints;p++)
                {
                        if(ea->res_arealist[p]>=trshld)
                        {
                                pt=getPoint4d(ea->inpts, p);
                                pt.m=ea->res_arealist[p];
                                ptarray_append_point(opts, &pt, LW_TRUE);
                        }
                }
        }
        else
        {
                /*Only return points with an effective area above the threshold*/
                for (p=0;p<ea->inpts->npoints;p++)
                {
                        if(ea->res_arealist[p]>=trshld)
                        {
                                pt=getPoint4d(ea->inpts, p);
                                ptarray_append_point(opts, &pt, LW_TRUE);
                        }
                }
        }
        destroy_effectivearea(ea);
 
        return opts;
 
}

References destroy_effectivearea(), POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, getPoint4d(), initiate_effectivearea(), EFFECTIVE_AREAS::inpts, LW_TRUE, LWDEBUG, POINT4D::m, POINTARRAY::npoints, ovdump::opts, ptarray_append_point(), ptarray_calc_areas(), ptarray_construct_empty(), and EFFECTIVE_AREAS::res_arealist.

Referenced by lwline_set_effective_area(), and lwpoly_set_effective_area().

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