From f7b2eca19efd9c7afe33a306df465fdca0474742 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Mon, 28 Nov 2005 11:20:12 +0000
Subject: [PATCH] Fixed ExteriorRing() and Segmentize() handling of bbox cache

git-svn-id: http://svn.osgeo.org/postgis/branches/pgis_1_0@2080 b70326c6-7e19-0410-871a-916f4a2858ee
---
 lwgeom/lwcollection.c           | 2 +-
 lwgeom/lwgeom_functions_basic.c | 5 +++++
 lwgeom/lwgeom_ogc.c             | 4 +++-
 lwgeom/lwline.c                 | 2 +-
 lwgeom/lwpoly.c                 | 2 +-
 5 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/lwgeom/lwcollection.c b/lwgeom/lwcollection.c
index edbab1ef5..ce8c4344b 100644
--- a/lwgeom/lwcollection.c
+++ b/lwgeom/lwcollection.c
@@ -294,7 +294,7 @@ lwcollection_segmentize2d(LWCOLLECTION *col, double dist)
 	for (i=0; i<col->ngeoms; i++)
 		newgeoms[i] = lwgeom_segmentize2d(col->geoms[i], dist);
 
-	return lwcollection_construct(col->type, col->SRID, col->bbox,
+	return lwcollection_construct(col->type, col->SRID, NULL,
 		col->ngeoms, newgeoms);
 }
 
diff --git a/lwgeom/lwgeom_functions_basic.c b/lwgeom/lwgeom_functions_basic.c
index e628b4a67..9af9926c3 100644
--- a/lwgeom/lwgeom_functions_basic.c
+++ b/lwgeom/lwgeom_functions_basic.c
@@ -2524,6 +2524,11 @@ Datum LWGEOM_segmentize2d(PG_FUNCTION_ARGS)
 
 	inlwgeom = lwgeom_deserialize(SERIALIZED_FORM(ingeom));
 	outlwgeom = lwgeom_segmentize2d(inlwgeom, dist);
+
+	// Copy input bounding box if any
+	if ( inlwgeom->bbox )
+		outlwgeom->bbox = box2d_clone(inlwgeom->bbox);
+
 	outgeom = pglwgeom_serialize(outlwgeom);
 
 	PG_FREE_IF_COPY(ingeom, 0);
diff --git a/lwgeom/lwgeom_ogc.c b/lwgeom/lwgeom_ogc.c
index fd81232d7..b3cb5a8bb 100644
--- a/lwgeom/lwgeom_ogc.c
+++ b/lwgeom/lwgeom_ogc.c
@@ -354,6 +354,7 @@ Datum LWGEOM_exteriorring_polygon(PG_FUNCTION_ARGS)
 	POINTARRAY *extring;
 	LWLINE *line;
 	PG_LWGEOM *result;
+	BOX2DFLOAT4 *bbox=NULL;
 
 	if ( TYPE_GETTYPE(geom->type) != POLYGONTYPE )
 	{
@@ -368,7 +369,8 @@ Datum LWGEOM_exteriorring_polygon(PG_FUNCTION_ARGS)
 	// This is a LWLINE constructed by exterior ring POINTARRAY
 	// If the input geom has a bbox, use it for 
 	// the output geom, as exterior ring makes it up !
-	line = lwline_construct(poly->SRID, poly->bbox, extring);
+	if ( poly->bbox ) bbox=box2d_clone(poly->bbox);
+	line = lwline_construct(poly->SRID, bbox, extring);
 
 	result = pglwgeom_serialize((LWGEOM *)line);
 
diff --git a/lwgeom/lwline.c b/lwgeom/lwline.c
index ed5cb9600..9c21124e0 100644
--- a/lwgeom/lwline.c
+++ b/lwgeom/lwline.c
@@ -366,7 +366,7 @@ lwline_reverse(LWLINE *line)
 LWLINE *
 lwline_segmentize2d(LWLINE *line, double dist)
 {
-	return lwline_construct(line->SRID, line->bbox,
+	return lwline_construct(line->SRID, NULL,
 		ptarray_segmentize2d(line->points, dist));
 }
 
diff --git a/lwgeom/lwpoly.c b/lwgeom/lwpoly.c
index 5d33be620..7b0ce7302 100644
--- a/lwgeom/lwpoly.c
+++ b/lwgeom/lwpoly.c
@@ -488,7 +488,7 @@ lwpoly_segmentize2d(LWPOLY *poly, double dist)
 	{
 		newrings[i] = ptarray_segmentize2d(poly->rings[i], dist);
 	}
-	return lwpoly_construct(poly->SRID, poly->bbox,
+	return lwpoly_construct(poly->SRID, NULL,
 		poly->nrings, newrings);
 }
 
-- 
2.40.0