Very clean and good example. If I am not mistaken, there are only two tentative corrections for the code. Instead of

(0,0,".",10,"Blue",1,5)
(0,0,"O",10,"Blue",1,5)

you should use previously defined variables Ox and Oy

(Ox,Oy,".",10,"Blue",1,5)
(Ox,Oy,"O",10,"Blue",1,5)

If Ox≠0, Oy≠0,
third and fourth line must be corrected:

Cx=Ox+OC*cos(δθ*t)

Cy=Oy+OC*sin(δθ*t)

Regards,Ber7

Edited by user 04 March 2012 13:01:22(UTC)  | Reason: Not specified

Here is the updated animation.
http://smath.info/wiki/G...gle/SimpleAnimation2.zip
Varying the values of Originx and Originy shift the animation as expected

I tried to tidy it up even more. In the above example, the origin is passed to the plot function using two parameters, Originx and Originy. I tried to pass the same values using a two-element vector, Origin, but without success: now I get a "t not defined" error in the 2D plot. To be consistent I also changed all the *x and *y parameters in the function to two-element vectors.
http://smath.info/wiki/G...le/SimpleAnimation2a.zip

Is there a special way to pass vectors to a function?
Is there a special way to define a vector inside a function?

Sorry, I'm still learning about SMath
By the way, I'm running SMath 0.93 on Windows 7

Regards

Brian

Square wheel
A square wheel rolls smoothly on inverted catenaries
References
G. B. Robison, Rockers and rollers, Math. Mag. 33 (1960), 139–144.

http://smath.info/wiki/G...File=square_%20wheel.rar

Edited by user 30 August 2012 08:34:11(UTC)  | Reason: Not specified