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email to forum re angle and rotations.doc

unknown1
1-Newbie

email to forum re angle and rotations.doc

Hi all,

I am making a curve to drive a section in a swept blend. The math for the
equation was helpfully provided by some members of the forum a while ago.



This was for a spiral, which increases at a constant rate as it goes around.

The equation goes as follows:



ro=1

a=.1535

orbit=2*t

degrees=orbit*360

radians=orbit*2*3.14159

theta=degrees

r=ro*exp(a*radians)

z=t*30





Top view Side view



As you can see, the angle decreases toward the bottom. The relationship for
z is linear.

Every time I make changes to the height or the rotations, all the angles
change.



I need to adjust it for the following:

a. I want to drive the angle that the curve makes with the vertical axis
with a constant value.

b. I want to drive the curve either by the number of turns or the height.



Is there anyone who can help me?



TIA



Sip

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