boomji

12 December 2008, 10:37 AM

Hi,

Not a script question per say but a math related one.

Scnario:

1. a sphere of radius: 100

2. a circle shape of radius: 100

3.I align the circle to the sphere

I want the circle to start with radius 100 and when i take it(or animate) down to the bottom of the sphere(pole) it should zero out in radius.

Ring conforms to the circumference on each step of it's way down.

What would the math be in this situation.

i could hack this by:

1.At each step along it's down path(circle Pivot) shoot a ray to the sphere and use the the magnitude to drive the radius.

but that wont further my mathematical understanding of the problem.

Thanks for any help.

b

Not a script question per say but a math related one.

Scnario:

1. a sphere of radius: 100

2. a circle shape of radius: 100

3.I align the circle to the sphere

I want the circle to start with radius 100 and when i take it(or animate) down to the bottom of the sphere(pole) it should zero out in radius.

Ring conforms to the circumference on each step of it's way down.

What would the math be in this situation.

i could hack this by:

1.At each step along it's down path(circle Pivot) shoot a ray to the sphere and use the the magnitude to drive the radius.

but that wont further my mathematical understanding of the problem.

Thanks for any help.

b