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T'vakah wrote:
>
> I just downloaded 3.1g and after reading the update list and am completely
> clueless as to what a 4D and, especially, 5D vector are. Is this somehow an
> aproximation of what a 4 or 5 dimension obejct would look like from 3D
> space?
>
> T'vakah
Only certain functions will accept 5D vectors
A 5D vector = <a,b,c,d,e>
e.g. pigment { rgbft <1,1,1,1,1> }
a float value is a single value such as - rotate x
Vectors are enclosed in < >
a float is a single expression or number
--
Ken Tyler
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm
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T'vakah wrote:
>
> I just downloaded 3.1g and after reading the update list and am completely
> clueless as to what a 4D and, especially, 5D vector are. Is this somehow an
> aproximation of what a 4 or 5 dimension obejct would look like from 3D
> space?
>
> T'vakah
My two cents worth:
A vector is a string of numbers / referances in an ordered group: such
as x,y on a graph.
In 3D space you need three references to an exact location: x,y,z
You could also use a three dimensional vector to hold color information
r,g,b
You could store the values of the amounts of three metals to make
different alloys
4D. Have extra information to store? Transparency? Use a 4D vector
<r,b,g,t>
It could be used to hold a location and a ? <x,y,z,?> Whatever ? is.
In POVRay, 3D space has been used in color <r,g,b> and location <x,y,z>,
4D space has been used with color in two ways <r,b,g,t> and <r,g,b,f>
5D space has been used with color also <r,g,b,t,f>
If you used a color vector <r,g,b> as a location vector <x,y,z>, it
would still work. Maybe.
If you use a location vector <x,y,z> as a color vector, you would get
very odd colors
Taking one set of data and applying it to a different situation isn't a
good idea.
4D vectors do not apply to <x,y,z> space and one more added length
measurement in some
direction that we, as 3D space creatures, just can't see. I know, I
know, many science
fiction stories are based on this idea. But POVRay is a 3D modeling
program. It uses them
for other things. 5D space is just the same.
Mr. Art
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On Sat, 24 Jul 1999 04:49:58 -0700, Ken <tyl### [at] pacbell net> wrote:
>
>
>Ron Parker wrote:
>>
>> On Thu, 22 Jul 1999 19:42:28 -0700, Ken wrote:
>> >a float value is a single value such as - rotate x
>>
>> Shame on you, Ken.
>
>I don't see any shame on me. Are you sure it's there ?
Hm.. Seems to be gone now. Musta been a trick of the light.
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Ron Parker wrote:
>
> On Sat, 24 Jul 1999 04:49:58 -0700, Ken <tyl### [at] pacbellnet> wrote:
>
> >
> >
> >Ron Parker wrote:
> >>
> >> On Thu, 22 Jul 1999 19:42:28 -0700, Ken wrote:
> >> >a float value is a single value such as - rotate x
> >>
> >> Shame on you, Ken.
> >
> >I don't see any shame on me. Are you sure it's there ?
>
> Hm.. Seems to be gone now. Musta been a trick of the light.
I'll meet my friend Ray down at the intersection and ask him to trace
this difference you are seeing. He has had plenty of time since poly's
been gone and is bound to shed some light on this for us.
--
Ken Tyler
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm
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