visualpython-users

[Visualpython-users] is a point "in" an object

[Nathan M. <nt...@gm...>]

I'm playing around with a complicated (boundary) in a Laplace equation
problem, in vpython.  It would be nice to know if a point is inside of
another object within the program, ie,

r=vector(1,1,1)
s=vector(0,0,0)

c = sphere(pos=(0,0,0),radius=0.75)

I want to know if r, or s are in the object c.

I've worked out some functions in longhand, but I figure an included
function might be faster...

Nathan

Re: [Visualpython-users] is a point "in" an object

[Bruce S. <Bru...@nc...>]

In the case of spheres this is pretty easy already: if mag(r-c.pos) < 
c.radius: print "inside".

It's certainly more difficult with other objects. What non-sphere 
objects did you have in mind?

Bruce Sherwood

Nathan Moore wrote:
> I'm playing around with a complicated (boundary) in a Laplace equation 
> problem, in vpython.  It would be nice to know if a point is inside of 
> another object within the program, ie,
>
> r=vector(1,1,1)
> s=vector(0,0,0)
>
> c = sphere(pos=(0,0,0),radius=0.75)
>
> I want to know if r, or s are in the object c.
>
> I've worked out some functions in longhand, but I figure an included 
> function might be faster...
>
> Nathan
>