[postgis-commits] svn - r3427 - trunk/cunit

[postgis-commits at postgis.refractions.net]

Author: pramsey
Date: 2008-12-16 16:22:26 -0800 (Tue, 16 Dec 2008)
New Revision: 3427

Modified:
   trunk/cunit/cu_algorithm.c
Log:
Add some co-linearity tests.


Modified: trunk/cunit/cu_algorithm.c
===================================================================
--- trunk/cunit/cu_algorithm.c	2008-12-17 00:19:27 UTC (rev 3426)
+++ trunk/cunit/cu_algorithm.c	2008-12-17 00:22:26 UTC (rev 3427)
@@ -490,5 +490,42 @@
 	setPoint4d(pa52, 4, p);
 	CU_ASSERT( lineCrossingDirection(l51, l52) == LINE_CROSS_LEFT );
 
+	/* One on-vertices co-linear crossing */
+	p->x = 1.0;
+	p->y = 1.0;
+	setPoint4d(pa52, 0, p);
+	p->x = 0.0;
+	p->y = 1.0;
+	setPoint4d(pa52, 1, p);
+	p->x = 0.0;
+	p->y = 2.0;
+	setPoint4d(pa52, 2, p);
+	p->x = -1.0;
+	p->y = 3.0;
+	setPoint4d(pa52, 3, p);
+	p->x = -1.0;
+	p->y = 4.0;
+	setPoint4d(pa52, 4, p);
+	CU_ASSERT( lineCrossingDirection(l51, l52) == LINE_CROSS_LEFT );
+
+	/* No crossing, but end on a co-linearity. */
+	p->x = 1.0;
+	p->y = 1.0;
+	setPoint4d(pa52, 0, p);
+	p->x = 1.0;
+	p->y = 2.0;
+	setPoint4d(pa52, 1, p);
+	p->x = 1.0;
+	p->y = 3.0;
+	setPoint4d(pa52, 2, p);
+	p->x = 0.0;
+	p->y = 3.0;
+	setPoint4d(pa52, 3, p);
+	p->x = 0.0;
+	p->y = 4.0;
+	setPoint4d(pa52, 4, p);
+	CU_ASSERT( lineCrossingDirection(l51, l52) == LINE_NO_CROSS );
+
+
 }