Subject:
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Re: How can I make the wheels rotate?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Mon, 20 May 2002 19:53:25 GMT
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Viewed:
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811 times
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In lugnet.cad.ray, Eduardo Vazquez Harte writes:
> Hi all,
> just a quick question How can make my wheels rotate around like normal car
> wheels instead of having the rotating around like if the are in orbit around
> a planet or some thing?
>
> I used this but is not right
>
> rotate <clock,0,0>}
In the model's POV code, there is a matrix that both rotates and positions
the wheel. It looks something like this:
matrix <1,0,0,0,1,0,0,0,1,25,30,35>
The first nine values control rotation and scaling of the part. The last 3
control the position of the part. Here's a good way to get a wheel to
rotate in place:
1: Change the last 3 numbers in the matrix to zeros. Make sure
you note what the values were, because this is important in
step 3.
2: Add your rotate statement right after that matrix. The line
you give will rotate the part along the X axis. This is
generally right for a wheel if the vehicle is pointing along
the Z axis. You could also use rotate <0,clock,0> or rotate
<0,0,clock> to rotate it along another axis. You might want
to put a multiplier on the clock as well, depending on how
fast you want the wheel to turn.
3: Add a translate statement right after the rotate. Use the 3
values that were originally the last 3 numbers in the matrix.
So, starting with this matrix:
matrix <1,0,0,0,1,0,0,0,1,25,30,35>
You should end up with:
matrix <1,0,0,0,1,0,0,0,1,0,0,0>
rotate <clock,0,0>
translate <25,30,35>
--
Tony Hafner
www.hafhead.com
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Message is in Reply To:
 | | How can I make the wheels rotate?
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| Hi all, just a quick question How can make my wheels rotate around like normal car wheels instead of having the rotating around like if the are in orbit around a planet or some thing? I used this but is not right rotate <clock,0,0>} (22 years ago, 17-May-02, to lugnet.cad.ray)
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