In article <37A02A80.FC2CCB77@panama.phoenix.net>, TonyB 
<ben### [at] panamaphoenixnet> wrote:

> One thing I've noticed is that these 'quartics' can do some of
> the stuff that an isosurface can do. Am I correct in assuming this?

Quartics are polynomials with x, y and z as variables. When the 
coordinates of a given point are plugged in the polynomial, the 
polynomial evaluates to some numerical value.

If the value is zero, the point is on the surface of the object 
represented by the polynomial. If the value is less than zero, the point 
is inside the object. If the value is greater than zero, the point is 
outside the object.

Thus the surface of the object consists of all the points in space with 
which the polynomial evaluates to zero.

--
Henri Sivonen
hen### [at] clinetfi
http://www.clinet.fi/~henris/

Post a reply to this message