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2.4 Animation 
Commercial animation programs are now very 
powerful and a personal computer can perform 
animaiton jobs very smoothly. This is an advanced 
procedure of the solid modeling process. Not only a 
little bit of practice are required but also over and over 
retrying are needed. The final products are very easy to 
display on a color monitor. 
3. RESULTS AND DISCUSSION 
Figure 1 is a proposed new dam shown in two different 
viewpoints. Usually a little bit of modification is 
required if another new dam will be constructed. Its 
total width and height can be automatically modified 
that a designer only required to input a new width and 
height. It is possible to modify some other parameters 
as well. A designer provides width and height , then a 
new dam will be automatically drawn by a CAD 
package and a new drawing file can be stored. It is 5 
meters in height , 38 meters in the upper width in figure 
1. 
  
Figure 1. Two different viewpoints of a proposed new dam. 
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