rect_node_leaf_new()

static RECT_NODE* rect_node_leaf_new ( const POINTARRAY *  pa, int  seg_num, int  geom_type  )

static

Definition at line 490 of file lwtree.c.

{
        const POINT2D *p1, *p2, *p3;
        RECT_NODE *node;
        GBOX gbox;
        RECT_NODE_SEG_TYPE seg_type = lwgeomTypeArc[geom_type];
 
        switch (seg_type)
        {
                case RECT_NODE_SEG_POINT:
                {
                        p1 = getPoint2d_cp(pa, seg_num);
                        gbox.xmin = gbox.xmax = p1->x;
                        gbox.ymin = gbox.ymax = p1->y;
                        break;
                }
 
                case RECT_NODE_SEG_LINEAR:
                {
                        p1 = getPoint2d_cp(pa, seg_num);
                        p2 = getPoint2d_cp(pa, seg_num+1);
                        /* Zero length edge, doesn't get a node */
                        if ((p1->x == p2->x) && (p1->y == p2->y))
                                return NULL;
                        gbox.xmin = FP_MIN(p1->x, p2->x);
                        gbox.xmax = FP_MAX(p1->x, p2->x);
                        gbox.ymin = FP_MIN(p1->y, p2->y);
                        gbox.ymax = FP_MAX(p1->y, p2->y);
                        break;
                }
 
                case RECT_NODE_SEG_CIRCULAR:
                {
                        p1 = getPoint2d_cp(pa, 2*seg_num);
                        p2 = getPoint2d_cp(pa, 2*seg_num+1);
                        p3 = getPoint2d_cp(pa, 2*seg_num+2);
                        /* Zero length edge, doesn't get a node */
                        if ((p1->x == p2->x) && (p2->x == p3->x) &&
                                (p1->y == p2->y) && (p2->y == p3->y))
                                return NULL;
                        lw_arc_calculate_gbox_cartesian_2d(p1, p2, p3, &gbox);
                        break;
                }
 
                default:
                {
                        lwerror("%s: unsupported seg_type - %d", __func__, seg_type);
                        return NULL;
                }
        }
 
        node = lwalloc(sizeof(RECT_NODE));
        node->type = RECT_NODE_LEAF_TYPE;
        node->geom_type = geom_type;
        node->xmin = gbox.xmin;
        node->xmax = gbox.xmax;
        node->ymin = gbox.ymin;
        node->ymax = gbox.ymax;
        node->l.seg_num = seg_num;
        node->l.seg_type = seg_type;
        node->l.pa = pa;
        return node;
}

References FP_MAX, FP_MIN, rect_node::geom_type, getPoint2d_cp(), rect_node::l, lw_arc_calculate_gbox_cartesian_2d(), lwalloc(), lwerror(), lwgeomTypeArc, RECT_NODE_LEAF::pa, RECT_NODE_LEAF_TYPE, RECT_NODE_SEG_CIRCULAR, RECT_NODE_SEG_LINEAR, RECT_NODE_SEG_POINT, RECT_NODE_LEAF::seg_num, RECT_NODE_LEAF::seg_type, rect_node::type, POINT2D::x, GBOX::xmax, rect_node::xmax, GBOX::xmin, rect_node::xmin, POINT2D::y, GBOX::ymax, rect_node::ymax, GBOX::ymin, and rect_node::ymin.

Referenced by rect_tree_from_ptarray().

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