Name:   animated track

Author: Ian Curington
        Advanced Visual Systems, Inc
        Waterman's Court
        Kingsbury Crescent
        The Causeway
        Staines
        Middlesex
        TW18 3BA
        United Kingdom
        +44-784-449141

Type: Data Input Control Module (coroutine)

Source: ani_track.c
        ani_track.txt
        ani_track.net
        Makefile

Parameters: "track" widget

Outputs:
            field 2d scalar uniform float  (4x4 matrix)
            geom edit list (for object transformations on %top)

Description:

Animated Track uses the "track" widget to control transformations
by producing a 4x4 transformation matrix, or using direct geometry
object transformation control. The track control is in "immediate"
mode, so that transformations are send dynamically in a stream
to the rest of the network. The module has both Field and Geom
output ports, so that either one or both may be used.
The module is a coroutine, so that animation sequences could be
added by inserting matrix modification code to the inner loop.




Example Network (A) Using the FIELD output port

               read volume
                   |
               downsize
                   |
   ani_track   colorizer
        |          |
        -----      |
             |     |
             tracer
               |
             display image

Example Network (B) Using the GEOM output port

       ani_track        read_geom
            |                |
            -----      -------
                 |     |
               geometry viewer

Related Modules: Euler Transfomation