[Tutor] Fwd: circular movement in pygame

[diliup gabadamudalige]

x=42 good
x += 42 -x ?

That does not go by a mile of what I asked.
Alan, are you telling me that there is no way that one can arrive at X2
which is the NEXT place that X1 will be after "some increment"?
old x position = X1

new x position= X1 + some increment value
which can be written as :new X = oldX + some increment value

which can be simplified to X += some increment value?

my orginal question was

*Why does the object NOT move in a circle when implemented as a class?*

All the code was provided.


The above is  what I asked. (I hope this is clear enough)









On Wed, Apr 29, 2015 at 1:56 PM, Alan Gauld <alan.gauld at btinternet.com>
wrote:

> On 29/04/15 09:03, diliup gabadamudalige wrote:
>
>> Thank you Alan. Understood. I already knew that. My question is
>>
>> How to to do it the second way.
>> some code = what?
>>
>>  The point is you cannot do it.
> The second approach always uses the current value of x.
> The first approach may or may not use the current value
> of x. If it does not use x then the += style cannot be
> made to work (unless you tag a -x on at the end!
>
> x = 42
>
> x += 42-x
>
> Which is just stupid.
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
>
>


-- 
Diliup Gabadamudalige

http://www.diliupg.com
http://soft.diliupg.com/

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