sync code with last improvements from OpenBSD

app/ico/objocta.h

@@ -0,0 +1,29 @@
+/* objocta.h - structure values for octahedron */
+
+{	"octahedron", "octa",	/* long and short names */
+	"cube",		/* long name of dual */
+	6, 12, 8,	/* number of vertices, edges, and faces */
+	{		/* vertices (x,y,z) */
+			/* all points must be within radius 1 of the origin */
+#define T 1.0
+		{  T,  0,  0 },
+		{ -T,  0,  0 },
+		{  0,  T,  0 },
+		{  0, -T,  0 },
+		{  0,  0,  T },
+		{  0,  0, -T },
+#undef T
+	},
+	{	/* faces (numfaces + indexes into vertices) */
+		/*  faces must be specified clockwise from the outside */
+		3,	0, 4, 2,
+		3,	0, 2, 5,
+		3,	0, 5, 3,
+		3,	0, 3, 4,
+		3,	1, 2, 4,
+		3,	1, 5, 2,
+		3,	1, 3, 5,
+		3,	1, 4, 3,
+	}
+},		/* leave a comma to separate from the next include file */
+/* end */