Changeset 4818

Timestamp:

Nov 15, 2007, 2:13:19 PM (17 years ago)

Author:

ole

Message:

Added Joaquim Luis' suggestion about polygon orientation in create_mesh_from_regions.

File:

• anuga_core/documentation/user_manual/anuga_user_manual.tex (modified) (1 diff)

anuga_core/documentation/user_manual/anuga_user_manual.tex

@@ -1065 +1065 @@
 polygon---\code{`top'}, \code{`ocean\_east'}, \code{`bottom'}, and
 \code{`onshore'}--- and whose values identify the indices of the
-segments associated with each of these tags. (The value associated
-with each boundary tag is a one-element list.)
+segments associated with each of these tags. 
+The polygon may be arranged either clock-wise or counter clock-wise and the 
+indices refer to edges in the order they appear: Edge 0 connects vertex 0 and vertex 1, edge 1 connects vertex 1 and 2; and so forth.
+(Here, the values associated with each boundary tag are one-element lists, but they can have as many indices as there are edges)
 If polygons intersect, or edges coincide the resolution may be undefined in some regions.
 Use the underlying mesh interface for such cases. See Section