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"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmail com> wrote:
>...
> If you have a vector vA where the x component is the smallest, then the returned
> vector is <0, -A.z, +A.y>.
> If you have a vector vA where the y component is the smallest, then the returned
> vector is <+A.z, 0, -A.x>.
> If you have a vector vA where the z component is the smallest, then the returned
> vector is <-A.y, +A.x, 0>.
>...
Hmmm... Sorry, but that's not true either. The returned vectors are normalized
versions of these.
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
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"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
>...
> For a vector to be orthogonal to another their dot product must be zero. I.e.:
>
> <0, -A.z, +A.y> * <A.x, A.y, A.z> = 0
> (0*A.x) + (-A.z*A.y) + (A.y*A.z) = 0
> -A.y*A.z +A.y*A.z = 0
>
> <+A.z, 0, -A.x> * <A.x, A.y, A.z> = 0
> (+A.z*A.x) + (0*A.y) + (-A.x*A.z) = 0
> +A.x*A.z -A.x*A.z = 0
>
> <-A.y, +A.x, 0> * <A.x, A.y, A.z> = 0
> (-A.y*A.x) + (A.x*A.y) + (0*A.z) = 0
> -A.x*A.y +A.x*A.y = 0
>...
Sorry, even more mistakes:
I should have written it like this:
vdot(<0, -A.z, +A.y>, <A.x, A.y, A.z>) = 0
etc.
IIRC multiplication of a vector by another in POV-Ray, like in my faulty code
above, results in a new vector. E.g. like this:
<0*A.x, -A.z*A.y, +A.y*A.z>
--
Tor Olav
http://subcube.com
https://github.com/t-o-k
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I made a short animation test of this final scene and posted to Vimeo, here:
https://vimeo.com/544091549
Comments welcomed :)
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Op 03/05/2021 om 02:34 schreef Robert McGregor:
> I made a short animation test of this final scene and posted to Vimeo, here:
>
> https://vimeo.com/544091549
>
> Comments welcomed :)
>
>
Wow! I had not realised those towers were also animated. Weird, to say
the least. I guess they are "alien fly trappers". The noise is what I
remember from those things, years ago, in south European bars and shops. :-)
--
Thomas
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On 5/2/21 8:34 PM, Robert McGregor wrote:
> I made a short animation test of this final scene and posted to Vimeo, here:
>
> https://vimeo.com/544091549
>
> Comments welcomed :)
>
>
Cool! Are the "fades" a POV-Ray implemented thing or post processing?
Bill P.
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Robert McGregor wrote on 03/05/2021 02:34:
> I made a short animation test of this final scene and posted to Vimeo, here:
>
> https://vimeo.com/544091549
>
> Comments welcomed :)
>
>
Nice!
The close-up of the towers is very bright, perhaps. I don't know if I'm
explaining well: at the end of the animation, when the towers are in the
background, they appear clear, almost evanescent, ok, but when there is
a close-up I would expect to have a more contrasted image.
Anyway, a beautiful animation!
Paolo
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hi,
"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> I made a short animation test of this final scene and posted to Vimeo, here:
> ...
> Comments welcomed :)
well, I was a little disappointed to see the promise ("maiden voyage") amount to
but a .5 second fly-by, but the sound effect made up for that. :-) (real nice,
particularly the towers. fwiw, they could rotate a bit more slowly)
regards, jr.
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