# ExpressionTubePlot¶

Author: Clifton J. Williamson Date Created: Bastille Day 1989 Keywords: Examples: Package for constructing tubes around 3-dimensional parametric curves.
constantToUnaryFunction(s) is a local function which takes the value of s, which may be a function of a constant, and returns a function which always returns the value DoubleFloat s.
tubePlot(f, g, h, colorFcn, a..b, r, n) puts a tube of radius r(t) with n points on each circle about the curve x = f(t), y = g(t), z = h(t) for t in [a, b]. The tube is considered to be open.
tubePlot(f, g, h, colorFcn, a..b, r, n, s) puts a tube of radius r(t) with n points on each circle about the curve x = f(t), y = g(t), z = h(t) for t in [a,b]. If s = “closed”, the tube is considered to be closed; if s = “open”, the tube is considered to be open.
tubePlot(f, g, h, colorFcn, a..b, r, n) puts a tube of radius r with n points on each circle about the curve x = f(t), y = g(t), z = h(t) for t in [a, b]. The tube is considered to be open.
tubePlot(f, g, h, colorFcn, a..b, r, n, s) puts a tube of radius r with n points on each circle about the curve x = f(t), y = g(t), z = h(t) for t in [a, b]. If s = “closed”, the tube is considered to be closed; if s = “open”, the tube is considered to be open.