cntr.c: patch by Ian Thomas to fix bug ID 2956378

efiring · efiring · commit 876182bd2baa · 2010-02-24T18:30:42.000Z
svn path=/trunk/matplotlib/; revision=8152
diff --git a/src/cntr.c b/src/cntr.c
@@ -605,6 +605,9 @@ edge_walker (Csite * site,  int pass2)
                 }
                 if (fwd < 0 && level0 && left < 0)
                 {
+		    /* remove J0_START from this boundary edge as boundary is
+		     * included by the upwards slit from contour line below. */
+                    data[edge] &= ~J0_START;
                     if (n_kind) kcp[n_kind] += kind_start_slit;
                     return slit_cutter (site, 0, pass2);
                 }

Original file line number	Diff line number	Diff line change
`@@ -605,6 +605,9 @@ edge_walker (Csite * site, int pass2)`
`605`	`605`	`}`
`606`	`606`	`if (fwd < 0 && level0 && left < 0)`
`607`	`607`	`{`
	`608`	`+ /* remove J0_START from this boundary edge as boundary is`
	`609`	`+ * included by the upwards slit from contour line below. */`
	`610`	`+ data[edge] &= ~J0_START;`
`608`	`611`	`if (n_kind) kcp[n_kind] += kind_start_slit;`
`609`	`612`	`return slit_cutter (site, 0, pass2);`
`610`	`613`	`}`