Introduction.-
It is extremely important to understand how objects
are draw in Metagraf and the consequences of not doing it in the
correct way. It can be said that more that 95% of problems arise
using Metagraf are due to the misunderstanding of this process.
This
process is the most important item in the use of Metagraf and it is
recommended to read very carefully this point.
Once understood,
everything else will be straight forward and without any
complexities. Moreover, the great simplicity of using Metagraf is
related with this process.
A few points must be perfectly clear.
This is what must be known:
The cursor and its different shapes.
The mode in which the user is, related with the cursor shape.
What should be done according to the mode and what shouldn't.
The way of controlling any unwanted mistakes.
A special difficulty arise from the usual way of working with other applications, specially in the insight of certain O.S., as Windows. In those, when trying to learn by "test and fault" the tendency is to click on a button and then try to do something (as clicking on the drawing panel). If the result is satisfactory, something has been "learned". Otherwise, another intent is done with another button. This method is the worst that can be applied to Metagraf.
As the process used for Metagraf is very simple, it should be learned and resist the temptation of trying any other one.
Madrid, January 2006 |
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