Re: Drag a Graphic Tool.

[Jim Hurley]

------------------------
Message: 2
Date: Sun, 28 Nov 2004 10:00:19 -0800
From: Roger Guay <[EMAIL PROTECTED]>
Subject: Re: Drag a Graphic Tool.
To: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; format=flowed
Thanks very much Jan.  I thought of something like this but I was
hoping to slow the "trace" down somehow.  Setting the points of a
polygon is instantaneous for each line segment . . .  not the effect I
was hoping for.  So far, I have made progress dragging the brush  tool
as It gives me some choice of the line width.

Roger,
Actually you can set the "linesize" of the line or polygon tool; you 
can have both your arrow and line size.

What you need apparently is more intermediate points in order to 
control rate of drawing between end points. One way to do this would 
be with, you guessed it, Turtle Graphics. (You would want the version 
that does vector graphics, not bit map.) For example, you could 
control the motion between any two points A and B as follows:

on mouseUP
  put 0,0 into A
  put 300,300 into B
  startTurtle
  setXY A
  setheading direction(B)
  put distance(B) into d
  put 3 into s --Or whatever works for you
  repeat round(d/s) times
    forward s
    --Perhaps a "wait" here
  end repeat
  setxy B --Just to take care of the rounding error
end mouseUP
And you could iterate this to take you through a sequence of points.
Jim
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