From: David Blasby <dblasby@gmail.com>
Date: Fri, 17 Oct 2003 16:12:23 +0000 (+0000)
Subject: Made Envelope() CW instead of CCW.
X-Git-Tag: pgis_0_8_0~66
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0427c4298a4626ee0afa3a1b4edf2a773029d7d6;p=postgis

Made Envelope() CW instead of CCW.


git-svn-id: http://svn.osgeo.org/postgis/trunk@316 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/postgis_fn.c b/postgis_fn.c
index 1f343b829..067bcabca 100644
--- a/postgis_fn.c
+++ b/postgis_fn.c
@@ -11,6 +11,9 @@
  *
  **********************************************************************
  * $Log$
+ * Revision 1.27  2003/10/17 16:12:23  dblasby
+ * Made Envelope() CW instead of CCW.
+ *
  * Revision 1.26  2003/10/17 16:07:05  dblasby
  * made isEmpty() return true/false
  *
@@ -1161,11 +1164,12 @@ Datum envelope(PG_FUNCTION_ARGS)
 
 	//use LLB's z value (we're going to set is3d to false)
 
-	set_point( &pts[0], geom->bvol.LLB.x , geom->bvol.LLB.y , geom->bvol.LLB.z );
-	set_point( &pts[1], geom->bvol.URT.x , geom->bvol.LLB.y , geom->bvol.LLB.z );
-	set_point( &pts[2], geom->bvol.URT.x , geom->bvol.URT.y , geom->bvol.LLB.z );
-	set_point( &pts[3], geom->bvol.LLB.x , geom->bvol.URT.y , geom->bvol.LLB.z );
+		//0,1,2,3,4 --> CCW order,  4,3,2,1,0 --> CW order
 	set_point( &pts[4], geom->bvol.LLB.x , geom->bvol.LLB.y , geom->bvol.LLB.z );
+	set_point( &pts[3], geom->bvol.URT.x , geom->bvol.LLB.y , geom->bvol.LLB.z );
+	set_point( &pts[2], geom->bvol.URT.x , geom->bvol.URT.y , geom->bvol.LLB.z );
+	set_point( &pts[2], geom->bvol.LLB.x , geom->bvol.URT.y , geom->bvol.LLB.z );
+	set_point( &pts[1], geom->bvol.LLB.x , geom->bvol.LLB.y , geom->bvol.LLB.z );
 
 	pts_per_ring[0] = 5; //ring has 5 points