echo(version=version()); // Functions can be defined to simplify code using lots of // calculations. // Simple example with a single function argument (which should // be a number) and returning a number calculated based on that. function f(x) = 0.5 * x + 1; color("red") for (a = [ -100 : 5 : 100 ]) translate([a, f(a), 0]) cube(2, center = true); // Functions can call other functions and return complex values // too. In this case a 3 element vector is returned which can // be used as point in 3D space or as vector (in the mathematical // meaning) for translations and other transformations. function g(x) = [ 5 * x + 20, f(x) * f(x) - 50, 0 ]; color("green") for (a = [ -200 : 10 : 200 ]) translate(g(a / 8)) sphere(1); // Written in 2015 by Torsten Paul <Torsten.Paul@gmx.de> // // To the extent possible under law, the author(s) have dedicated all // copyright and related and neighboring rights to this software to the // public domain worldwide. This software is distributed without any // warranty. // // You should have received a copy of the CC0 Public Domain // Dedication along with this software. // If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.