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1 Nov 2024 05:21:45 EDT (-0400)
  ripples on the surface of a sphere ? (Message 1 to 8 of 8)  
From: Dennis Clarke
Subject: ripples on the surface of a sphere ?
Date: 25 Apr 2003 15:52:07
Message: <Pine.GSO.4.53.0304251512440.17302@blastwave>
I was playing with chrome/mercury blobs :

 http://www.blastwave.org/dclarke/povray/output/chrome.avi
 http://www.blastwave.org/dclarke/povray/output/tet.avi

 I was trying to figure out how to make surface ripples on the blobs that
 would emulate ripples on a still pond or lake but wrapped onto a sphere.

 I figure that the only way to do this would be to tessalate the sphere
 manually and then add a sinusoidal interferance effect to the surface that
 would be a standing wave pattern in 3D.  While it may be possible to add a
 bump map effect in a still frame I wonder about an animation.  My hope is
 to create a reasonable animation of a sphere that has droplets falling away
 from it radially first and then downwards due to spinning.

 Any thoughts ?

 Dennis


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From: Christopher James Huff
Subject: Re: ripples on the surface of a sphere ?
Date: 25 Apr 2003 16:49:40
Message: <cjameshuff-BB4BC1.16501725042003@netplex.aussie.org>
In article <Pine.GSO.4.53.0304251512440.17302@blastwave>,
 Dennis Clarke <dcl### [at] blastwaveorg> wrote:

>  I was playing with chrome/mercury blobs :
> 
>  http://www.blastwave.org/dclarke/povray/output/chrome.avi
>  http://www.blastwave.org/dclarke/povray/output/tet.avi

Neither of your movies play on my Mac...they probably use a codec that I 
don't have.


>  I figure that the only way to do this would be to tessalate the sphere
>  manually and then add a sinusoidal interferance effect to the surface that
>  would be a standing wave pattern in 3D.  While it may be possible to add a
>  bump map effect in a still frame I wonder about an animation.  My hope is
>  to create a reasonable animation of a sphere that has droplets falling away
>  from it radially first and then downwards due to spinning.

Tessellating the object could work. You could then do an actual 
simulation of ripples going across the surface.

If the ripples aren't very deep and don't need to be very accurate, just 
a ripple effect is good enough, then some kind of procedural normal 
pattern would work better. If they are deep but don't need to be very 
accurate, an isosurface with the same procedural pattern would work.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/


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From: Dennis Clarke
Subject: Re: ripples on the surface of a sphere ?
Date: 25 Apr 2003 21:05:44
Message: <Pine.GSO.4.53.0304252104530.18120@blastwave>
> Neither of your movies play on my Mac...they probably use a codec that I
> don't have.

 the odd thing is that I produced them both with QuickTime.  The codec is
 Intel Indeo .

 dc


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From: Thorsten Froehlich
Subject: Re: ripples on the surface of a sphere ?
Date: 26 Apr 2003 03:41:54
Message: <3eaa3842$1@news.povray.org>
In article <Pine.GSO.4.53.0304252104530.18120@blastwave> , Dennis Clarke 
<dcl### [at] blastwaveorg>  wrote:

>> Neither of your movies play on my Mac...they probably use a codec that I
>> don't have.
>
>  the odd thing is that I produced them both with QuickTime.  The codec is
>  Intel Indeo .

How ancient was the version of QuickTime you used?  The last time Apple
included this codec was in QuickTime 4, about four years ago.  Even
Microsoft stopped including the Intel Indeo codec in Windows XP SP1...

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


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From: Thorsten Froehlich
Subject: Re: ripples on the surface of a sphere ?
Date: 26 Apr 2003 03:47:19
Message: <3eaa3987$1@news.povray.org>
In article <cja### [at] netplexaussieorg> , 
Christopher James Huff <cja### [at] earthlinknet>  wrote:

>>  http://www.blastwave.org/dclarke/povray/output/chrome.avi
>>  http://www.blastwave.org/dclarke/povray/output/tet.avi
>
> Neither of your movies play on my Mac...they probably use a codec that I
> don't have.

You can if you have an old version of QuickTiem installed (3 or 4 should
do), or you may be able to run it on Mac OS 9 (not Classic) with a current
QuickTime if you download the old Mac OS 8 codec from
<http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/En
glish-North_American/Macintosh/System/QuickTime/Indeo_Video_5.smi.bin> and
install it.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


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From: Dennis Clarke
Subject: Re: ripples on the surface of a sphere ?
Date: 26 Apr 2003 08:07:28
Message: <Pine.GSO.4.53.0304260806030.18325@blastwave>
On Sat, 26 Apr 2003, Thorsten Froehlich wrote:

>In article <Pine.GSO.4.53.0304252104530.18120@blastwave> , Dennis Clarke
><dcl### [at] blastwaveorg>  wrote:
>
>>> Neither of your movies play on my Mac...they probably use a codec that I
>>> don't have.
>>
>>  the odd thing is that I produced them both with QuickTime.  The codec is
>>  Intel Indeo .
>
>How ancient was the version of QuickTime you used?  The last time Apple
>included this codec was in QuickTime 4, about four years ago.  Even
>Microsoft stopped including the Intel Indeo codec in Windows XP SP1...
>
>    Thorsten

 QuickTime ver 5.0.2


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From: Thorsten Froehlich
Subject: Re: ripples on the surface of a sphere ?
Date: 26 Apr 2003 17:08:09
Message: <3eaaf539@news.povray.org>
In article <Pine.GSO.4.53.0304260806030.18325@blastwave> , Dennis Clarke 
<dcl### [at] blastwaveorg>  wrote:

>  QuickTime ver 5.0.2

Interesting.  Did you have 4.0 on that system before?  Otherwise, I guess
QuickTime is able to use Windows codecs already on your system (Ididn't know
that)...

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org


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From: Dennis Clarke
Subject: Re: ripples on the surface of a sphere ?
Date: 27 Apr 2003 00:03:09
Message: <Pine.GSO.4.53.0304270001331.1525@blastwave>
On Sat, 26 Apr 2003, Thorsten Froehlich wrote:

>In article <Pine.GSO.4.53.0304260806030.18325@blastwave> , Dennis Clarke
><dcl### [at] blastwaveorg>  wrote:
>
>>  QuickTime ver 5.0.2
>
>Interesting.  Did you have 4.0 on that system before?  Otherwise, I guess
>QuickTime is able to use Windows codecs already on your system (Ididn't know
>that)...
>
>    Thorsten
>

 let me think .. uh .. no .. that is a fresh license.  It is possible that the
 codecs were picked up from the system.  Microsoft Internet Explorer will
 launch Windows Media Player and they work.

 Dennis


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