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I was wondering if any one out there has any suggestions on how I could
make a Mouse , Dog, and a cat tail look real.
I'm fairly new to povray and have been slowly working on an animation.
Most of my atempts for a tail either look like a bad snake path or a fern
closing. Any suggestions /code example would be greatly
appreciated..
Wes Robbins.
As a part two: Does any know of a place I could find four legged animal
movements (Walking and running) for povray?
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"Greg M. Johnson" <gregj:-)565### [at] aol com> wrote in message
news:3c67ecef$1@news.povray.org...
> "Apache" <apa### [at] yahoocom> wrote in message
> news:3c67c3f3@news.povray.org...
> > I'm afraid that using IK (Inverse Kinematics) will be the best way of
> doing
> > that.
> >
>
> Really? IK surely makes the most sense for hip-knee-foot, but does it
> really for hip-middle_tail-middle_tail-middle_tail-end_of_tail?
>
> I think a tail flows via pure FK. The question is in choosing the right
> time sequence for the wag.
>
>
I used a progagating sine wave for my dragon's tail:
#declare animlength = 32.0; // length of the scene in seconds
#declare cyclelength = 2.0; // period of one tail-wag
#declare aclock = clock*animlength; // aclock ranges from 0 to 32
// cycleclock ranges from 0 to 1 over cyclelength
#declare cycleclock = (aclock/cyclelength - int(aclock/cyclelength));
#macro tz(p)
(0.2*p * cos((p/24-cycleclock)*2*pi)) // Side to Side wagging
#end
// Tail Segment Rotation = < curl up, twist clockwise, curl left>
#declare tailpos = array[tailsegments] {
< 0, 0, tz(36)>, // rotation of tail segment 1
< 0, 0, tz(35)>, // rotation of tail segment 2
< 0, 0, tz(34)>, // rotation of tail segment 3
// ...
< 0, 0, tz( 3)>, // rotation of tail segment 34
< 0, 0, tz( 2)>, // rotation of tail segment 35
< 0, 0, tz( 1)>} // rotation of tail segment 36
This provides a nice even wag where the rotation of each segment is relative to the
segment it is attached to.
If, however, I wanted the tail to flip a light-switch, I would try to figure out an
IK way to do it.
Rune has an IK Neck include file which I've downloaded but not looked at yet.
http://rsj.mobilixnet.dk/3d/include/include.html
Thomas Bates
--
#macro T(B)#local m=mod(B,8);#local B=floor(B/8);m#end#local C=126981491245202;#
local D=115694168992822;sphere_sweep{b_spline 16#local i=0;#while(i<16)<T(C)-4,T
(D)-4,10-i/10>.1#local i=i+1;#end pigment{rgb 1}}light_source{-10,1} //Tom Bates
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"wesr" wrote:
> I was wondering if any one out there has any suggestions
> on how I could make a Mouse , Dog, and a cat tail look real.
Hmm, I don't check this group so often, so this reply is a little late.
You could check out my Inverse Kinematics Neck include file which is
specifically designed to animate long necks and tails:
http://rsj.mobilixnet.dk/3d/include/include.html
This of course assumes that the movement is your problem. If it's the look
that's difficult (such as how to obtain fur or whatever), it might be a
better idea to post in another group.
Rune
--
3D images and anims, include files, tutorials and more:
Rune's World: http://rsj.mobilixnet.dk (updated Feb 16)
POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk
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