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List: geos-commits
Subject: [geos-commits] r2591 - in trunk/source: algorithm
From: svn_geos () osgeo ! org
Date: 2009-06-16 15:46:11
Message-ID: 20090616154611.143DBE00C38 () lists ! osgeo ! org
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Author: strk
Date: 2009-06-16 11:46:10 -0400 (Tue, 16 Jun 2009)
New Revision: 2591
Modified:
trunk/source/algorithm/RobustDeterminant.cpp
trunk/source/headers/geos/algorithm/RobustDeterminant.h
Log:
Sync RobustDeterminant to revision 1.14
Modified: trunk/source/algorithm/RobustDeterminant.cpp
===================================================================
--- trunk/source/algorithm/RobustDeterminant.cpp 2009-06-16 15:43:14 UTC (rev 2590)
+++ trunk/source/algorithm/RobustDeterminant.cpp 2009-06-16 15:46:10 UTC (rev 2591)
@@ -15,7 +15,7 @@
*
**********************************************************************
*
- * Last port: algorithm/RobustDeterminant.java 1.13 (JTS-1.7)
+ * Last port: algorithm/RobustDeterminant.java 1.14 (JTS-1.7)
*
**********************************************************************/
Modified: trunk/source/headers/geos/algorithm/RobustDeterminant.h
===================================================================
--- trunk/source/headers/geos/algorithm/RobustDeterminant.h 2009-06-16 15:43:14 UTC (rev 2590)
+++ trunk/source/headers/geos/algorithm/RobustDeterminant.h 2009-06-16 15:46:10 UTC (rev 2591)
@@ -14,7 +14,7 @@
*
**********************************************************************
*
- * Last port: algorithm/RobustDeterminant.java 1.13 (JTS-1.7)
+ * Last port: algorithm/RobustDeterminant.java 1.14 (JTS-1.7)
*
**********************************************************************/
@@ -51,6 +51,15 @@
*/
class GEOS_DLL RobustDeterminant {
public:
+
+ /** \brief
+ * Computes the sign of the determinant of the 2x2 matrix
+ * with the given entries, in a robust way.
+ *
+ * @return -1 if the determinant is negative,
+ * @return 1 if the determinant is positive,
+ * @return 0 if the determinant is 0.
+ */
static int signOfDet2x2(double x1,double y1,double x2,double y2);
};
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