Date: Wed, 15 Dec 1999 17:40:24 -0800
From: bugreports moderator
<bug### [at] povrayorg>
Subject: Re: Not quite a bug but
To: Matt Giwer <jul### [at] ijnet>
Organization: POV-Team
X-Mailer: Forte Agent 1.7/32.534

On Wed, 15 Dec 1999 15:49:48 -0800, you wrote:

>    windows version
>
>    insert|shapes|superellipsoid reads
>
>{ .25 , .25} instead of { <.25, .25>}
>
>

  There are likely more typographical errors than just
this one.
Several had been corrected from POV-Ray v3.0 to v3.1.
Please post this
in error in povray.windows and bring it to the
attention of the TAG
personnel. They may want to keep a running list of
typographical
errors in the Insert Menu items and the general POV-Ray
docs.

  Thank you for your participation.

--
bug### [at] povrayorg
b u g r e p o r t s <dash> m o d e r a t o r <at>
p o v r a y <dot> o r g

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That strength/radius switch in blob is really confusing.

Bob

"Matt Giwer" <jul### [at] ijnet> wrote in message
news:385872E1.7384278A@ij.net...
> Date: Wed, 15 Dec 1999 17:40:24 -0800
> From: bugreports moderator
> <bug### [at] povrayorg>
> Subject: Re: Not quite a bug but
> To: Matt Giwer <jul### [at] ijnet>
> Organization: POV-Team
> X-Mailer: Forte Agent 1.7/32.534
>
> On Wed, 15 Dec 1999 15:49:48 -0800, you wrote:
>
> >    windows version
> >
> >    insert|shapes|superellipsoid reads
> >
> >{ .25 , .25} instead of { <.25, .25>}
> >
> >
>
>   There are likely more typographical errors than just
> this one.
> Several had been corrected from POV-Ray v3.0 to v3.1.
> Please post this
> in error in povray.windows and bring it to the
> attention of the TAG
> personnel. They may want to keep a running list of
> typographical
> errors in the Insert Menu items and the general POV-Ray
> docs.
>
>   Thank you for your participation.
>
> --
> bug### [at] povrayorg
> b u g r e p o r t s <dash> m o d e r a t o r <at>
> p o v r a y <dot> o r g
>
>

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On Wed, 15 Dec 1999 21:55:11 -0600, "omniVERSE" <inv### [at] aolcom>
wrote:

>That strength/radius switch in blob is really confusing.
>
>Bob

Can you please explain (or point out the correct post for me) this
blob problem so that I can keep track of it? Thank you.


Peter Popov
pet### [at] usanet
ICQ: 15002700

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Peter Popov wrote:
> 
> On Wed, 15 Dec 1999 21:55:11 -0600, "omniVERSE" <inv### [at] aolcom>
> wrote:
> 
> >That strength/radius switch in blob is really confusing.
> >
> >Bob
> 
> Can you please explain (or point out the correct post for me) this
> blob problem so that I can keep track of it? Thank you.

This thread concerns the premade insert menu files. The one Bob is pointing
out comes from the insert menu for the blob object. In particular he is
refering to the way the radius and blob strength is defined for that object
as follows:

// create a smooth blobby shape
#declare StrengthVal = 1.0 // (+ or -) strength of component's radiating density
#declare RadiusVal   = 1.0 // (0 < RadiusVal) outer sphere of influence on other      
                     // components
blob
{
  // threshold (0.0 < threshold <= StrengthVal) surface falloff threshold #
  threshold 0.6
  sphere { < 0.75,   0,    0>, StrengthVal, RadiusVal }
  sphere { <-0.375,  0.65, 0>, StrengthVal, RadiusVal }
  sphere { <-0.375, -0.65, 0>, StrengthVal, RadiusVal }
  cylinder { -z, +z, 0.1, StrengthVal, RadiusVal }
  // [sturm]
  scale 2
}


-- 
Wishing you Seasons Greetings, A Merry Christmas, and A Happy New Year !
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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Thanks Ken.  Yes, and in the Scene help looking up BLOB you get:

BLOB:

blob { BLOB_ITEM... [BLOB_MODIFIERS...]}

BLOB_ITEM:

sphere{<Center>, Radius, [ strength ] Strength [COMPONENT_MODIFIER...] } |
cylinder{<End1>, <End2>, Radius, [ strength ] Strength
[COMPONENT_MODIFIER...] } |
component Strength, Radius, <Center> |
threshold Amount

COMPONENT_MODIFIER:

TEXTURE | PIGMENT | NORMAL | FINISH | TRANSFORMATION

BLOB_MODIFIER:

hierarchy [Boolean] |
sturm [Boolean] |
OBJECT_MODIFIER

Opposite of the Insert menu item Shapes/blob.  I believe the Insert menu is
incorrect, although it isn't all that easy to tell.  Fact is if you change
the first float value after the position vector(s) it obviously changes the
size, whereas the second (strength?) float does not.  Always confusing
unless you use it a lot sometime and have a good memory between times the
blob is used.  And btw, I may have mentioned it before here at the
newsgroups and got it backward then, don't know for sure : )

Bob

"Ken" <tyl### [at] pacbellnet> wrote in message
news:38587FFD.57C85C40@pacbell.net...
>
>
> Peter Popov wrote:
> >
> > On Wed, 15 Dec 1999 21:55:11 -0600, "omniVERSE" <inv### [at] aolcom>
> > wrote:
> >
> > >That strength/radius switch in blob is really confusing.
> > >
> > >Bob
> >
> > Can you please explain (or point out the correct post for me) this
> > blob problem so that I can keep track of it? Thank you.
>
> This thread concerns the premade insert menu files. The one Bob is
pointing
> out comes from the insert menu for the blob object. In particular he is
> refering to the way the radius and blob strength is defined for that
object
> as follows:
>
> // create a smooth blobby shape
> #declare StrengthVal = 1.0 // (+ or -) strength of component's radiating
density
> #declare RadiusVal   = 1.0 // (0 < RadiusVal) outer sphere of influence on
other                            // components
> blob
> {
>   // threshold (0.0 < threshold <= StrengthVal) surface falloff threshold
#
>   threshold 0.6
>   sphere { < 0.75,   0,    0>, StrengthVal, RadiusVal }
>   sphere { <-0.375,  0.65, 0>, StrengthVal, RadiusVal }
>   sphere { <-0.375, -0.65, 0>, StrengthVal, RadiusVal }
>   cylinder { -z, +z, 0.1, StrengthVal, RadiusVal }
>   // [sturm]
>   scale 2
> }
>
>
> --
> Wishing you Seasons Greetings, A Merry Christmas, and A Happy New Year !
> Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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