asx3d3_mpoly_coordindex_sb()

static int asx3d3_mpoly_coordindex_sb ( const LWMPOLY *  psur, stringbuffer_t *  sb  )

static

Todo:

TODO: Decide the best way to render holes Evidently according to my X3D expert the X3D consortium doesn't really support holes and it's an issue of argument among many that feel it should. He thinks CAD x3d extensions to spec might. What he has done and others developing X3D exports to simulate a hole is to cut around it. So if you have a donut, you would cut it into half and have 2 solid polygons. Not really sure the best way to handle this. For now will leave it as polygons stacked on top of each other – which is what we are doing here and perhaps an option to color differently. It's not ideal but the alternative sounds complicated.

Definition at line 177 of file lwout_x3d.c.

{
        LWPOLY *patch;
        uint32_t i, j, k, l;
        uint32_t np;
        j = 0;
        for (i=0; i<psur->ngeoms; i++)
        {
                patch = (LWPOLY *) psur->geoms[i];
                for (l=0; l < patch->nrings; l++)
                {
                        np = patch->rings[l]->npoints - 1;
                        for (k=0; k < np ; k++)
                        {
                                if (k)
                                {
                                        stringbuffer_aprintf(sb,  " ");
                                }
                                stringbuffer_aprintf(sb,  "%d", (j + k));
                        }
                        j += k;
                        if (l < (patch->nrings - 1) )
                        {
                                stringbuffer_aprintf(sb,  " -1 "); /* separator for each inner ring. Ideally we should probably triangulate and cut around as others do */
                        }
                }
                if (i < (psur->ngeoms - 1) )
                {
                        stringbuffer_aprintf(sb,  " -1 "); /* separator for each subgeom */
                }
        }
        return LW_SUCCESS;
}

References LWMPOLY::geoms, LW_SUCCESS, LWMPOLY::ngeoms, POINTARRAY::npoints, LWPOLY::nrings, LWPOLY::rings, and stringbuffer_aprintf().

Referenced by asx3d3_multi_sb().

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