OpenSCAD Header

//--------------------------------
// {Project Name}
// {Creator Name}
// CC 2018
// OpenSCAD
//--------------------------------

// Thingiverse Customizer Docs: http://customizer.makerbot.com/docs

// OpenSCAD uses millimeters (mm) for units.
// Distance functions are both for conversion and to state plainly that a number is a
//    measurement, not just a value.
// Fractions are interpreted as formulas: '1 3/4' = '1+3/4' = 1.75
function mm(x = 1)     = x *    1.00000;
function cm(x = 1)     = x *   10.00000;
function m(x = 1)      = x * 1000.00000;
function inches(x = 1) = x *   25.40000;
function feet(x = 1)   = x *   25.40000 * 12;
function yards(x = 1)  = x *   25.40000 * 12 * 3;

function twice(x = 1)  = x *    2.00000;
function half(x = 1)   = x *    0.50000;

// OpenSCAD uses degrees (deg) for units.
// Angle functions are both for conversion and to state plainly that a number is a
//    measurement, not just a value.
_pi   = 3.14159265359;
_ease = 1.0155;  // Multiply holes by this to counteract shrinkage in 3d printed parts.

function deg(x = 1) = x;
function rad(x = 1) = x * (180 / _pi);

quality = 72; // [12:6:360]
smoothness=$preview ? 12 : quality; // (Circles are divided in $fn line segments.)
echo($preview,smoothness);
$fn = smoothness;

//--------------------------------------------------------------------------------------------