asx3d3_mline_coordindex()

static size_t asx3d3_mline_coordindex ( const LWMLINE *  mgeom, char *  output  )

static

if the linestring is closed, we put the start point index for the last vertex to denote use first point and don't increment the index

Definition at line 219 of file lwout_x3d.c.

References LWMLINE::geoms, lwline_is_closed(), LWMLINE::ngeoms, POINTARRAY::npoints, and LWLINE::points.

Referenced by asx3d3_multi_buf().

{
        char *ptr=output;
        LWLINE *geom;
        int i, j, k, si;
        POINTARRAY *pa;
        int np;

        j = 0;
        for (i=0; i < mgeom->ngeoms; i++)
        {
                geom = (LWLINE *) mgeom->geoms[i];
                pa = geom->points;
                np = pa->npoints;
                si = j;  /* start index of first point of linestring */
                for (k=0; k < np ; k++)
                {
                        if (k)
                        {
                                ptr += sprintf(ptr, " ");
                        }
                        if (!lwline_is_closed(geom) || k < (np -1) )
                        {
                                ptr += sprintf(ptr, "%d", j);
                                j += 1;
                        }
                        else
                        {
                                ptr += sprintf(ptr,"%d", si);
                        }
                }
                if (i < (mgeom->ngeoms - 1) )
                {
                        ptr += sprintf(ptr, " -1 "); /* separator for each linestring */
                }
        }
        return (ptr-output);
}

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