drawelems4

(./mat4/drawelems4.m)

Function Synopsis

hel=drawelems4(elems,x,y,z) 

Help text

DRAWELEMS4 draw FEM element configuration 
   DRAWELEMS4 a routine to draw element boundries given an element,
   node, and (optionally) bathymetry lists.  If no z-
   coordinates are given, the mesh is drawn in 2-D.
   Otherwise, the mesh is drawn in 3-D, with the view
   perspective set to azimuth=-27 deg and 
   elevation=30 deg.  See the MATLAB VIEW command for 
   more on view points.

     Input :
             elems - a 3- or 4-column matrix giving the nodes comprising 
                     each element.  If there are 3 columns, each line 
                     should be "n1 n2 n3", a triangular element
                     description.  If there are 4 columns, each line
                     should be "n1 n2 n3 n4", a quadrilateral
                     element description.
             x     - an x-coord list of nodes;
             y     - a  y-coord list of nodes; 
             z     - a  z-coord list of nodes (optional);
            
             x,y,z must be 1-D vectors.
           
   Output :  DRAWELEMS returns the handle of the element object.

             NOTES: 1) Element line-segments are drawn in solid white.
                       This will be an optional argument in the future.
                    2) Existing plots are added to.
                    3) Axis limits are NOT set.  'axis('equal')' may
                       need to be issued by the user, if it has not already.

   Call as: >>  hel=drawelems4(elems,x,y,z);

 Written by: Brian O. Blanton