How do Fractal Terrains grow
Evgeny Demidov
Look "How do Fractal Terrains grow" (an interactive WRL) at
http://www.people.nnov.ru/fractal/VRML/3DLab.htm
http://www.ipm.sci-nnov.ru/~demidov/VRML/3DLab.htm :(may be down)
I'm thinking on 3D L-system fractals (trees)
Evgeny
P Flavin
including plants, terrain, and mathematical objects ...
Java and VRML Plug-ins are compared for suitability ...
VRML plug-ins have a speed advantage and are best
at rendering complex scenes quickly.
Java has an advantage where complex animations
or complex scenes are being created ... they can be
used together ( with VRML EAI ) or separately.
| " 3D L-System fractals (trees) "
|
| A lot of very realistic looking 3D trees you can find on
| Laurens Lapre pages ( unfortunately I've seen only
| 2D pictures there :)
|
| 3D trees are defined by tiny LS rules and are generated
| recursively. I have simple 2D L-System applets and "trees"
| and "carpets" galleries. I didn't find a small realistic 3D tree
| for VRML :-( I could see VRML files with size ~ 1Mb only)
| but I like very much Fractal Polyhedra.
|
http://www.people.nnov.ru/fractal/VRML/3dLsys/3Dtree.htm
http://www.cpsc.ucalgary.ca/Redirect/bmv/java/LSystems/LSys.html
http://www.cpsc.ucalgary.ca/Redirect/bmv/java/LSystems/lsys_info.html
" Plants : Fractal Patterns and Modeling " ( Java3D )
http://www.hta-bi.bfh.ch/~swc/DemoJ3D/VirtualPlants/
" Recursively Defined Structures & Fractals for Plants -- LSystem "
http://www.hta-bi.bfh.ch/~swc/DemoJ3D/VirtualPlants/www/static/
analysis/analysis.html#_Toc455411504
| But I've got a new problem:
|
| There are not "multi-colored" and transparent IFS and ILS
| [ IndexedFaceSet and IndexLineSet - surface and line structures ]
| in Blaxxun3D. So I can't make "nice" Terrains and Lorenz.
| I'll try sphere, Clouds and simple crystals. Or shall I use any
| other applet ?
|
http://x59.deja.com/getdoc.xp?AN=641712959
It looks like Shout3d supports using a ColorIndex array
for colorizing IndexedFaceSet meshes, and Java3d should
also.
The VRML plug-ins are better at rendering complex scenes
relative to Java applets ( Java3D is a different story ).
Java 1.0 and Java 1.1 applets are slower than native ( compiled )
code and the Blaxxun3d and Shout3d Java Viewers do not implement
some of the rendering options so they can render with less of speed
disadvantage; where rendering speed and quality are the primary
criterea the VRML plug-ins are the logical choice, sometimes they
can be used with Java ( using the VRML EAI ) but this combination
is often problematic and introduces even more portability problems.
http://www.shout3d.com/shout3d_doc_dir/docs/javadocs/index.html
http://www.shout3d.com/shout3d_doc_dir/docs/javadocs/
shout3d/core/IndexedFaceSet.html
shout3d/core/IndexedFaceSet.html#colorPerVertex
shout3d/core/IndexedFaceSet.html#colorIndex
http://www.shout3d.com/shout3d_doc_dir/Shout3d_runtime/
demos/renderTests/colorPerVertexCombos.html
demos/lineRobot.html
IndexedFaceSet : defining a new Node type ( Pyramid ) which can
then be used as though it were a primative
http://www.shout3d.com/shout3d_doc_dir/Shout3d_runtime/
demos/pyramidClickStretch.html
codebase/applets/PyramidTestPanel.java
codebase/applets/PyramidTestApplet.java
codebase/custom_nodes/Pyramid.java
codebase/models/onePyramid.s3d
| Questions :
|
| 1. Why a 50kb applet may be faster than a 2 Mb VRML plugin ?
| E.g. my Cortona is fastest with its own rendering engine
| ( DirectX or OpenGL are slower ).
|
http://www.people.nnov.ru/fractal/VRML/Test/examine.htm
There is no one " best solution ", each method has it's own
advantages and disadvantages.
VRML plug-ins are optimized for one specific machine
type ( the " Windows Only " ones for the x86 architecture )
and are faster at rendering complex scenes.
However, as you have found _ CREATING _ complex
scenes with Javascript can be very slow -- 10 or 20 times
slower than using Java ( not Javascript or the vrml script )
-- and the VRML EAI interface may be slow.
Java is faster than the VRML plug-ins when you are creating
complex scenes with numerically intensive computations where
the speed advantage of Java over Javascript dominates.
So it depends on the task : I'm interested in human animation
of relatively simple models and relatively complex animations
and behaviors and Java is clearly superior for the number
crunching, portability, and superior support for Object-Oriented-
Programming.
2. What is Java3D browser plugin ?
It's an attempt to make Java3D easier to use on the Web,
and currently it is relatively difficult and I would discourage
most people from using it at this time, it will get easier ...
Sun, AOL / Netscape / Mozilla, and Web3d are working
to make Java3D easier to use on the web and are working
to integrate it into the Mozilla browser and integrated it
into other devices ( so VRML will be portable in portable
devices and other devices including televisions and Web
Tablets and Web Pads ).
The Java FAQ has more info :
http://www.j3d.org/
http://www.j3d.org/faq/browser.html
Again, Java3D requires Java 2 and a graphics layer such as
OpenGL so it may require _ HUGE _ downloads if placed
in a web page ... so avoid this unless you have a good reason
to do otherwise.
3. Is Java3D with DirectX portable to Unix or Mac ?
First, Macintosh does not support Java3D at this time.
Macintosh has had very poor support for Java, but
Steve Jobs was at this years " Java One " conference
and said " the Macintosh will be the best platform in
the world for Java " and that Java 2 will ship with
the new OS-X ( 10 ), and he gave a demo of Java 2
running on a beta version of OS-X which developers
have now and will ship with machines in early 2001.
Apple has not disclosed if they will support Java3D.
I recommend those using Java3D use OpenGL rather
than DirectX, and Java3D is portable across Windows,
Linux, and several other types of Unix ( with SGI & HP-UX ).
- - - - - - - - - - - - - - - - - - - - -
| " VRML or not VRML "
|
http://www.people.nnov.ru/fractal/VRML/Test/examine.htm
I'm using both, displaying VRML with Java ( without plug-ins
on the web using Shout3d and with Java3D for higher quality
rendering off-line, and sometimes creating VRML on-the-fly
and displaying it with Java.
Both Java and VRML are intended to be portable and they
work together well, and where there are portability problems
and speed problems with Javascript with the Plug-in Viewers
... Java offers a better solution where those are problem.
" 3D Engines --- FREE SOURCE CODE available ---
http://www.cs.tu-berlin.de/~ki/engines.html
http://anfyteam.com/ln/russian/ ( Anfy3D info in Russian )
" VRML Java Viewer " -- My Favorite, My Own, et all.
http://www.frontiernet.net/~imaging/java3dviewer.html
http://www.cs.tu-berlin.de/~ki/engines.html
http://www.shout3d.com/about.html
http://www.blaxxun.com/products/blaxxun3d/showcase/index.html
http://www.anfyteam.com/dev/
http://www.cyber.koganei.tokyo.jp/top/
Lots of people are doing lots of things with Java.
>
> Look "How do Factual Terrains grow" (an interactive WRL) at
> http://www.people.nnov.ru/fractal/VRML/3DLab.htm
> ...
> I'm thinking on 3D L-system fractals (trees)
>
Evgeny Demidov <dem...@ipm.sci-nnov.ru> wrote
The Plants example above is very good, it has :
pictures, source code ( Java3d ) and the theory.
Examples : VRML EAI Demo & FAQ, Java only :
http://www.frontiernet.net/~imaging/HAnimPoser.html
http://www.frontiernet.net/~imaging/eaifaq.html
http://www.frontiernet.net/~imaging/H-Anim_Avatars.html
http://www.frontiernet.net/~imaging/java3dviewer.html
-- Paul, Java Developer & Web Animator.
------------------------------------------------------------------------
"Imaging the Imagined : Modeling with Math & a Keyboard"
Evgeny Demidov
I made "animated" octahedron with Blaxxun3D
http://www.people.nnov.ru/fractal/VRML/Test/anim.htm
http://www.people.nnov.ru/fractal/VRML/Test/examine.htm
It was very simple. I'll try Ice Mountains at al. after I learn Blaxxun3D
EAI.
Evgeny
jake reid
Totally amazing animation! Thanks Paul + Evgeny, what a team!
Evgeny Demidov
> Totally amazing animation! Thanks Paul + Evgeny, what a team!
It was really very easy.
The great mystery (or secret :) is:
how to make a 3D applet without any pluging (like Blaxxun, Anfy ...)
I've found several OpenGL Java bindings:
http://www.opengl.org/Documentation/Implementations/Languages.html?Java#first_hit
but all of them need installation for browser? (I looked "Magician" only :)
As like as Java3D :-(
Evgeny
P-O Olsson
>
>The great mystery (or secret :) is:
>how to make a 3D applet without any pluging (like Blaxxun, Anfy ...)
>I've found several OpenGL Java bindings:
>http://www.opengl.org/Documentation/Implementations/Languages.html?Java#fir
st_hit
>but all of them need installation for browser? (I looked "Magician" only :)
>As like as Java3D :-(
>
>Evgeny
>
I don't think it's necessary to install any browser
plugins for viewing 3D applets developed in Anfy3D.
Since they are written in standard Java, almost
every browser will run them.
/P-O Olsson
Evgeny Demidov
> >The great mystery (or secret :) is:
> >how to make a 3D applet without any pluging (like Blaxxun, Anfy ...)
> I don't think it's necessary to install any browser
> plugins for viewing 3D applets developed in Anfy3D.
> Since they are written in standard Java, almost
> every browser will run them.
I can't set "camera target" (centre of rotation) in Anfy. And I have to learn
Blaxxun, Shout, Anfy... I'd better write my own library (if I can :)
Now I have to learn Blaxxun EAI for interection with an applet.
Evgeny
Mr. Phillip
time.
http://www.philliphansel.com/shout/autogen_octa_cube_trunc.html
I used Spazz3D and Shout3D so it was very easy. I am working on the 32
crystal classes, but am not finished yet.
--
---
Mr. Phillip Sand Hansel II
mr.ph...@home.com
http://philliphansel.com
"Evgeny Demidov" <dem...@ipm.sci-nnov.ru> wrote in message
news:3962E5E9...@ipm.sci-nnov.ru...
Evgeny Demidov
> Interesting that we were both working on truncated octahedrons at the same
> time.
> http://www.philliphansel.com/shout/autogen_octa_cube_trunc.html
> I used Spazz3D and Shout3D so it was very easy. I am working on the 32
> crystal classes, but am not finished yet.
It is much faster unde NC4.7 than under IE5.
Is it a regular hexagon? It must be due to cube symmetry.
I prefer Java3D now. I don't like 3D applets because they are not free :)
Evgeny