ptarray_to_SFCGAL()

static sfcgal_geometry_t * ptarray_to_SFCGAL ( const POINTARRAY *  pa, int  type  )

static

Convert a PostGIS pointarray to SFCGAL structure.

Definition at line 265 of file lwgeom_sfcgal.c.

{
        POINT4D point;
        int is_3d, is_measured;
        uint32_t i;
 
        assert(pa);
 
        is_3d = FLAGS_GET_Z(pa->flags) != 0;
        is_measured = FLAGS_GET_M(pa->flags) != 0;
 
        switch (type)
        {
        case POINTTYPE: {
                getPoint4d_p(pa, 0, &point);
                return create_sfcgal_point_by_dimensions(point.x, point.y, point.z, point.m, is_3d, is_measured);
        }
        break;
        case LINETYPE: {
                sfcgal_geometry_t *line = sfcgal_linestring_create();
                for (i = 0; i < pa->npoints; i++)
                {
                        getPoint4d_p(pa, i, &point);
                        sfcgal_linestring_add_point(
                            line,
                            create_sfcgal_point_by_dimensions(point.x, point.y, point.z, point.m, is_3d, is_measured));
                }
                return line;
        }
        break;
        case TRIANGLETYPE: {
                sfcgal_geometry_t *triangle = sfcgal_triangle_create();
                for (i = 0; i < 3; i++)
                {
                        getPoint4d_p(pa, i, &point);
                        sfcgal_geometry_t *vertex =
                            create_sfcgal_point_by_dimensions(point.x, point.y, point.z, point.m, is_3d, is_measured);
                        if (vertex)
                        {
                                sfcgal_triangle_set_vertex(triangle, i, vertex);
                                sfcgal_geometry_delete(vertex);
                        }
                }
                return triangle;
        }
        break;
        default:
                lwerror("ptarray_to_SFCGAL: Unknown Type");
                return NULL;
        }
}

References create_sfcgal_point_by_dimensions(), POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, getPoint4d_p(), LINETYPE, lwerror(), POINT4D::m, POINTARRAY::npoints, POINTTYPE, TRIANGLETYPE, POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by LWGEOM2SFCGAL().

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