Re: Animations with image size matching output resolution

[Daniel J S. <dan...@ie...>]

Ethan A Merritt wrote:

I said wait.  :-)

Read on...


> On Saturday 31 December 2005 06:43 pm, Daniel J Sebald wrote:
> 
> 
>>1) It would be nice if looping could be done without requiring two
>>files.
> 
> 
> It can, although the lack of if/else/endif blocks makes it ugly:
> 
> if (!defined(i))    foo = foo0
> if (!defined(i))    baz = baz0
> if (!defined(i))    i = 0
> i = i + 1
> ... do lots of stuff
> reread


OK, that sort of works.  I didn't think of defined().  But what if i happens to be defined already upon loading such a script and the user doesn't realize it?  It could run without complaints but not produce the desired results.


> 
> 
>>2) Modulo (%) doesn't seem to work with negative numbers.  Shouldn't it?
> 
> 
> Works for me:
> 
> gnuplot> 
> gnuplot> print 9 % 8
> 1
> gnuplot> print -9 % 8
> -1
> gnuplot> 
> 
> Or were you expecting  -9 % 8  to be 7?


Yes, I guess that is what I was expecting--something in the set of integers [0,7], related to modular arithmetic.

Also, Octave generates 7.

The reason this came about is that to get the globe from your world2.dem demo to rotate in the right direction requires a -10 increment in the z rotation.  The modular math as it is means eventually a negative value results and gnuplot complains about that view angle "must be between 0 and 360".  I solved this of course by making the increment 350 degrees.

> 
> 
>>3) We've got to combine the layout and border behavior for 2D and 3D
>>plots.
> 
> 
> Good luck!

I don't think it should be too difficult to do that anymore.  I seem to recall unifying those a bit already.  Definitely post 4.1.

Dan