On 10-3-2013 10:16, BertvdB wrote:
> You're wright, I tried it with a isosurface and then you'll get the black holes.

That might be a different kind of fish indeed. Been a long time since I 
last used isosurfaces so my question might be irrelevant; are black 
holes also occurring with iso-CSG objects/height_fields, developed by 
Christoph Hormann and ABX? I think that might be your answer. Look at:

http://www.imagico.de/pov/ic/index.php

Thomas

Post a reply to this message

Hi(gh)!

On 05.03.2013 21:41, Alain wrote:

> Things like one, two or tree steps inside a house are not uncommon, and
> some times intentional. I've also seen floors showing rather steep
> slopes, with very notable curves, and even un-planed waves about 60cm
> deep by 3~4m long (in a school built in the 60's)...

> someone in my family who lived there for about 90 years. The ground
> settled unevenly.

As you are a Canadian, I suppose you have seen these examples in the 
permafrost regions of Canada (Mackenzie, Nunavut etc.) - I have heard 
similar stories from Siberia! When the uppermost few metres of 
otherwisely permanently frozen soil thaw during summer and turn into 
soft mud, many buildings (except those built on concrete pillars 
reaching into the perennial permafrost) "float" in that mud and 
gradually distort by their own weight...

See you in Khyberspace!

Yadgar

Post a reply to this message

> Hi(gh)!
>
> On 05.03.2013 21:41, Alain wrote:
>
>> Things like one, two or tree steps inside a house are not uncommon, and
>> some times intentional. I've also seen floors showing rather steep
>> slopes, with very notable curves, and even un-planed waves about 60cm
>> deep by 3~4m long (in a school built in the 60's)...

>> someone in my family who lived there for about 90 years. The ground
>> settled unevenly.
>
> As you are a Canadian, I suppose you have seen these examples in the
> permafrost regions of Canada (Mackenzie, Nunavut etc.) - I have heard
> similar stories from Siberia! When the uppermost few metres of
> otherwisely permanently frozen soil thaw during summer and turn into
> soft mud, many buildings (except those built on concrete pillars
> reaching into the perennial permafrost) "float" in that mud and
> gradually distort by their own weight...
>
> See you in Khyberspace!
>
> Yadgar


at all.
In that school case, it looks like someone confounded feet for meters 
for the spacing of the support beams under a wooden floor in an 
otherwise concreete construction.... They just "forgot" the halways for 
the second and third floors classes and needed to patch something fast a 
few day before the inauguration.

Nevertheless, I've seen some bits of the building code for area having 
permafrost.
It include insulated floor, more that the walls..., broad air pipes 
oriented to the dominant wind passing under the building, stilt building 
raising the whole building over 1m over the ground or deep fundations 
going to the rock bed.



Alain

Post a reply to this message

Thomas de Groot <tho### [at] degrootorg> wrote:
> On 10-3-2013 10:16, BertvdB wrote:
> > You're wright, I tried it with a isosurface and then you'll get the black holes.
>
> That might be a different kind of fish indeed. Been a long time since I
> last used isosurfaces so my question might be irrelevant; are black
> holes also occurring with iso-CSG objects/height_fields, developed by
> Christoph Hormann and ABX? I think that might be your answer. Look at:
>
> http://www.imagico.de/pov/ic/index.php
>
> Thomas
The shapes from Christph are "functions" that are differenced to a new function
and this will build the isosurface. So it is not exactly a difference between a
object and a isosurface.
Bert

Post a reply to this message