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"clipka" wrote in message news:51f250db$1@news.povray.org...
> You mean cases where two vertices of one patch coincide?
No, cases where more or less than four patches meet at one corner. C2 is
(afaict) impossible in most of these cases. The great thing about mesh is
that you can cheat a little bit to make things look near-perfect, even when
they're not. I'd like to *tell* the patch what its normal vectors are,
rather than having these vectors calculated by POV-ray.
> I'd rather have genuine triangular bicubic patches.
That too, but you'd have a hard time using them without the flexibility of
"normal maps".
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"clipka" wrote in message news:51f25051$1@news.povray.org...
> - CSG scene: Any scene that defines all its complex shapes as unions,
> merges, intersections and/or differences of less complex solid shapes
> (which in turn might also be defined this way); after all, that is exactly
> what "CSG" means: "Constructive Solid Geometry". (In the strict sense this
> would even allow for meshes, provided they have an inside_vector, but I'd
> be ok with still disallowing them.)
> - Hand-coded scene: Any scene that was created using nothing more than a
> text editor and POV-Ray itself.
> The two terms are perfectly orthogonal: The shapes in a CSG scene can be
> both hand-coded and/or created with a CSG modeling tool, and a hand-coded
> scene can have both CSG shapes and/or non-CSG shapes.
Not perfectly, we can quibble on the definition of "strict sense" you
mentioned above. Even a triangle, can be replaced by a compound (ok,
difference) of planes.
If linear prisms are allowed, will curved prisms be allowed as well? I don’t
completely disagree with allowing linear prisms as a shortcut, but there's
something nice about being able to say a shape is made from planes, spheres,
boxes, cones, cylinders, and tori (rings). These shapes (ok, maybe not
planes) are known to children. Most people think of a prism as something to
make rainbows out of sunlight.
-Shay
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That (flattr) works. Thank you.
"clipka" wrote in message news:51f256bf@news.povray.org...
Am 26.07.2013 11:36, schrieb Shay:
> Yeah, about that. I can find no way to support POV-Ray. The wishlist is
> empty, and the 'support' link on the website links to the online forums
> page.
Heh. The "support" link isn't meant to be for people intending to
support POV-Ray, but for people requesting support about POV-Ray :-P
> You're (to me) the most visible POV developer at the moment. Is
> there a book or something you'd find useful?
You've caught me off guard there - I'll try to come up with something.
Alternatively, I might point you to one of the following pages:
http://www.lipka-koeln.de/%C3%BCber-pov-ray/
http://www.lipka-koeln.de/%C3%BCber-pov-ray/%C3%BCberpov/
and draw your (and anyone else's) attention particularly to the small
green Flattr buttons.
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Am 26.07.2013 15:12, schrieb Shay:
> If linear prisms are allowed, will curved prisms be allowed as well?
Why, yes, of course.
> I don’t completely disagree with allowing linear prisms as a shortcut, but
> there's something nice about being able to say a shape is made from
> planes, spheres, boxes, cones, cylinders, and tori (rings). These shapes
> (ok, maybe not planes) are known to children. Most people think of a
> prism as something to make rainbows out of sunlight.
I have no problem with you considering this an art form of its own, but
assigning this concept to the term "CSG scene" is like assigning the
concept of haikus to the word "poetry": Sure, every haiku qualifies as
poetry, but if you ask me to write poetry don't necessarily expect me to
write a haiku.
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"clipka" wrote in message news:51f27f3b@news.povray.org...
Am 26.07.2013 15:12, schrieb Shay:
>> If linear prisms are allowed, will curved prisms be allowed as well?
> Why, yes, of course.
But not triangles? Patches?
> I have no problem with you considering this an art form of its own, but
> assigning this concept to the term "CSG scene" is like assigning the
> concept of haikus to the word "poetry": Sure, every haiku qualifies as
> poetry, but if you ask me to write poetry don't necessarily expect me to
> write a haiku.
Maybe we need a third term. There's even some disagreement about what
qualifies as a haiku.
I'm just exploring what would be the most fun sandbox for a side-challenge
round of the tcrtc. I think we agree that some explication of "csg scene"
would be useful. It's all up to Thomas in the end, of course.
-Shay
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Am 26.07.2013 16:02, schrieb Shay:
>
>
> "clipka" wrote in message news:51f27f3b@news.povray.org...
>
> Am 26.07.2013 15:12, schrieb Shay:
>
>>> If linear prisms are allowed, will curved prisms be allowed as well?
>
>> Why, yes, of course.
>
> But not triangles? Patches?
Why, no, of course not. They're not Solid Geometry, so don't fit the
bill of CSG = "Constructive Solid Geometry".
> Maybe we need a third term. There's even some disagreement about what
> qualifies as a haiku.
How about "hardcore CSG"? :-)
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"clipka" wrote in message news:51f28bbb$1@news.povray.org...
>> Maybe we need a third term. There's even some disagreement about what
>> qualifies as a haiku.
> How about "hardcore CSG"? :-)
I like "Children'S Garden"
^ ^ ^
C S G
This is the root of kindergarten--don't know if that is a common term
outside the US
A great image for kindergarten:
http://upload.wikimedia.org/wikipedia/commons/5/53/Eakins%2C_Baby_at_Play_1876.jpg
-Shay
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Thomas de Groot <tho### [at] degroot org> wrote:
> On 26-7-2013 0:28, Shay wrote:
> > A CSG (primitive primitives) sub-round of the tcrtc might draw some
> > interesting entries.
>
> I shall note this down for future reference. Once the new procedures are
> in place (which will be soon I hope) we can launch indeed such a challenge.
>
> Thomas
Yes indeed I would like such a challenge. But we must consider that not only
POVers participate in TC-RTC. We would exclude them with this approach.
Best regards,
Michael
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Am 26.07.2013 16:59, schrieb Shay:
> I like "Children'S Garden"
> ^ ^ ^
> C S G
>
> This is the root of kindergarten--don't know if that is a common term
> outside the US
Well, at least over here in Germany it is :-P
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On 26-7-2013 21:36, MichaelJF wrote:
> Yes indeed I would like such a challenge. But we must consider that not only
> POVers participate in TC-RTC. We would exclude them with this approach.
>
That is true. However, if we can run two challenges simultaneously as is
the plan, one can be devoted to POV-Ray from time to time. After all,
the site was launched by this community ;-)
Thomas
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