Hi,
	The following code creates a spiral that starts out at y = 0 at the 
outer radius and gains height (y) as the radius decreases. Can anyone 
suggest a way to do this without distorting the cross-section radius of 
the spiral in the y direction? I'm also having trouble getting it into 
an upside-down funnel shape that falls off the way I want it to (raising 
it more just in the center).

isosurface {
  #declare F = function { f_spiral(x, y, z, 0.5, 0.05, 3, -0, -0, 1) }
  function { F(x, y-1/f_r(x, y/8, z), z) }
  contained_by { box { -4, 4 } }
  max_gradient 10
  pigment { rgb<1, 0, 0> }
}

Any help would be greatly appreciated,
Ryan

Post a reply to this message