CAD tip # 14061:

In addition to specifying the end points of the geometry, you only need to specify the animation speed, the accuracy of the approximation and the colour of the drawing.

In the LISP file itself (and in the video) you can see examples of such animated drawing:

• geometry specified by coordinates - e.g. you can create an animation of a green crossed square using:

   (aGrDraw '(-5 -5 0) '(5 -5 0) 3) ; CROSS-BOX
   (aGrDraw '(5 -5 0) '(5 5 0) 3)
   (aGrDraw '(5 5 0) '(-5 5 0) 3)
   (aGrDraw '(-5 5 0) '(-5 -5 0) 3)
   (aGrDraw '(-5 -5 0) '(5 5 0) 3)
   (aGrDraw '(-5 5 0) '(5 -5 0) 3)
  

  The yellow sine wave is then drawn/animated using:

   (repeat 75 ; SINUS
    (aGrDraw (list i (sin i) 0) (list (setq i (+ 0.177 i))(sin i) 0) 2)
   )
  

• interpretation of an X-Y data stream (e.g. ECG curve) or even multiple streams at once - simulated in the example by a definition of data table:

   (setq EKGdata '( (2 81) ; data set - EKG
    (3 83) (4 88) (5 98) (6 92) (7 85) (8 73) (9 71)
    (10 70) (11 83) (12 73) ...
  

• connection to 2DPLOT - the utility 2Dplot creates an auxiliary data table after generating a mathematical curve, which can then be drawn (if the AnimDraw library is loaded) as animated - by calling the LISP function (2dplotanim)