Re[4]: car wheels problem

[Christopher <walksfar(at)netscape.ca>]

Hello guillaume, alright give me a few hours to study this I'll get back to you on my studies :) Any questions or problems I hope I can ask you :)

Christopher

Monday, January 2, 2006, 2:38:53 PM, you wrote:

>

Hi Christopher,

 

Here is a sample scene : http://www.vol2nuit.fr/la_roue.scn

 

Feel free to study the setup. And take a look at "Scripted operator" in the doc ;-)

 

 

Cheers

 

Guillaume

 

2006/1/2, Christopher <walksfar(at)netscape.ca>: 

Hello guillaume, I don't think my wheel is radius is of 1.  So I apply this:

 

Out.Value = ((Incrvlist.value.Geometry.Length*Inperc.value)/((2*3.14*YOUR WHEEL RADIUS)*100))*360

To the wheels of the car? In the script editor, I am in need of getting this done so I appreciate your help.

Monday, January 2, 2006, 3:06:33 AM, you wrote:

>

I forgot :   If your wheel radius is not 1 : Out.Value = ((Incrvlist.value.Geometry.Length*Inperc.value)/((2*3.14*YOUR WHEEL RADIUS)*100))*360   2006/1/2, guillaume laforge <guillaume.laforge.3d(at)gmail.com>:   Hi Christoher,   A fast way to control the rotation of the wheel is to create a null and path constrain it along a curve ( the car trajectory ). Then parent your wheel/box object to this null and add a scripted operator on the wheel/box rotation axis.   In this scripted op add two inputs : the path and the path percentage parameter of the null.   The script op should looks like this : Out.Value = ((Incrvlist.value.Geometry.Length*Inperc.value)/((2*3.14)*100))*360 If you don't want to use a path to animate your object it is more complicated. You should take a look at "Getting started with scripting in xsi" from Helge Mathee, there is a good tutorial on rolling wheel with scripted op.     Cheers,     Guillaume Laforge www.vol2nuit.fr   2006/1/2, Christopher <walksfar(at)netscape.ca>:  I have run into a problem I have 2 sets of wheels constrained to the orientation of a box (when you rotate the box the wheels rotate) now  how do I get this box (the wheels) to follow the car so the wheels rotate based on the speed of the car in the +Z axis? Christophers --- Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body: unsubscribe xsi

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Best regards,

 Christopher                            mailto:walksfar(at)netscape.ca

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Best regards,

 Christopher                            mailto:walksfar(at)netscape.ca

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