Vector Arrow --- create arrows from 3-vector field

    author : KGT (Kubota Graphics Technologies) Inc.

    Makefile.osf1    for DEC Alpha/osf1
    Makefile.sun2    for SUN Solaris2.3 

    vector.c         source file 
    AllocArea.c     
    CrConeObj.c    
    CrLibObj.c    
    CrVecObj.c   
    HsvToRgb.c
    SetConeDt.c
    SetNumDiv.c
    SetVectors.c
    cone.c
    l_vector.h
    

    vector.net       sample network
    vector2.net      sample network

    vector.txt       Module Reference

Name    Vector Arrow --- show vectors from 3-vector field 

Summary
   Name           Vector Arrow
   Name	          mapper
   Inputs         field 3-vector real irregular 3-space
                  field scalar real irregular 3-space(optional)
	          colormap(optional)
   Outputs        geom

   Parameters     Name            Type   Default  Min/Max
                  scale          float   1.0      unbound
                  vector type    choice  bar      bar/high/cone
                                                     /middlecone/low/cone
                  cross section  choice  3D       3D,x-y,x-z,y-z
                  cone min       float   0.0      unbound
                  cone max       float   1.0      unbound

Description
   The "Vector Arrow" module inputs a 3-vector field (1D,2D,3D) and 
   creates arrows. This module looks like the "hedgehogs" module. 

   The optional port(field scalar/colormap) can be used to generate colored 
   arrows. The color at each point on the arrow (vector field) indicates 
   the value of another attributes(pressure,temperature...)(Show Example2).
   
   The vector type parameter controls the type of arrow. 
   The defaults is bar(line). 

   The cross section parameter specifies what component is used.
   For example, if you select the x_y button, the first and second 
   component is used to create arrows.
    
Parameters
   scale                The lengths of the line segments output by this 
                        module are proportional to this value.
   vector type	        Selects the type of arrow.
   cross section        Specifies the vector component.
   cone  min            Sets the minimum value of arrow heads.
   cone  max            Sets the maximum value of arrow heads.

Example1
     The following network reads a sample data
     ($AVS_PATH/data/field/bluntfin.fld).

                         read_field 
                             |
                   +---------+-----------+
                   |                     |
            extract vector               |        
                   |                     |
            orthgonal slicer       volume bounds
                   |                     |
              Vector Arrow               |
                   |                     |
                   +----------+----------+
                              |
                       geometry viewer

Example2
                              |
                     orthgonal slicer
                              |        
                     +--------+--------+        
                     |                 |
                extract scalar  extract vector  
                     |                 |
   generate colormap +---------+  +----+
             |                 |  | 
             +--------------+  |  | 
                            |  |  | 
                         Vector Arrow
                               |        

     Notice to change the lower/upper parameter of the 
     "generate colormap" module.