blob21

The blob in all its glory:

Twirl with your mouse

$0.005{\left(x^2+y^2+z^2\right)}^3+x^{3}y+x{z}^3+y^{3}z<70$

Click on the snapshot to download the blob's stl file.

1; # Prevent Octave from thinking that this is a function
   # though one is defined here
   
  function w = f(x2,y2,z2,c,r,e) 
   x  = (x2-c(1))/r(1);
   y  = (y2-c(2))/r(2);
   z  = (z2-c(3))/r(3);
   # function at origin must be <0, and >0 far enough away.  w=0 defines the surface
   w=(x.^3.*y + y.^3.*z + z.^3.*x ) + 0.005*(x.^2 + y.^2 + z.^2).^3 - 70 ;

   endfunction;