diff --git a/files.html b/files.html
index 0235a44bb712f8d3c4fa1fc30a79b875f1de985c..d8a656fc940992ee5c7a6f009055c1ed9a541fd0 100644
--- a/files.html
+++ b/files.html
@@ -19,6 +19,7 @@
<a href='./js/files.js'>files.js</a><br>
<a href='./js/mods.js'>mods.js</a><br>
<a href='./js/modules.js'>modules.js</a><br>
+<i> node_modules</i><br>
<a href='./js/printserver.js'>printserver.js</a><br>
<a href='./js/programs.js'>programs.js</a><br>
<a href='./js/serialserver.js'>serialserver.js</a><br>
@@ -83,6 +84,7 @@
<a href='./modules/frep/transforms/inflate'>inflate</a><br>
<a href='./modules/frep/transforms/reflect'>reflect</a><br>
<a href='./modules/frep/transforms/repeat'>repeat</a><br>
+ <a href='./modules/frep/transforms/revolve'>revolve</a><br>
<a href='./modules/frep/transforms/rotate'>rotate</a><br>
<a href='./modules/frep/transforms/scale'>scale</a><br>
<a href='./modules/frep/transforms/shear'>shear</a><br>
diff --git a/modules/frep/transforms/revolve b/modules/frep/transforms/revolve
new file mode 100755
index 0000000000000000000000000000000000000000..94fca97657889191320ec42d9018902f8731c40f
--- /dev/null
+++ b/modules/frep/transforms/revolve
@@ -0,0 +1,240 @@
+//
+// frep revolve
+//
+// Neil Gershenfeld
+// (c) Massachusetts Institute of Technology 2018
+//
+// This work may be reproduced, modified, distributed, performed, and
+// displayed for any purpose, but must acknowledge the mods
+// project. Copyright is retained and must be preserved. The work is
+// provided as is; no warranty is provided, and users accept all
+// liability.
+//
+// closure
+//
+(function(){
+//
+// module globals
+//
+var mod = {}
+//
+// name
+//
+var name = 'frep revolve'
+//
+// initialization
+//
+var init = function() {
+ mod.x.checked = false
+ mod.y.checked = false
+ mod.z.checked = true
+ mod.ox.value = 0
+ mod.oy.value = 0
+ mod.oz.value = 0
+ }
+//
+// inputs
+//
+var inputs = {
+ shape:{type:'',
+ event:function(evt){
+ mod.shape = evt.detail
+ outputs.shape.event()
+ }}}
+//
+// outputs
+//
+/*
+revolve
+ axis x y z
+ origin x y z
+ x
+ x = rxz
+ y = y
+ y
+ x = x
+ y = ryz
+ z
+ x = rxy
+ y = z
+*/
+var outputs = {
+ shape:{type:'',
+ event:function(){
+ var fn = mod.shape.function
+ var variables = mod.shape.variables
+ var type = mod.shape.type
+ var ox = parseFloat(mod.ox.value)
+ var oy = parseFloat(mod.oy.value)
+ var oz = parseFloat(mod.oz.value)
+ var limits = []
+ for (var v = 0; v < mod.shape.limits.length; ++v) {
+ limits[v] = []
+ limits[v][0] = mod.shape.limits[v][0]
+ limits[v][1] = mod.shape.limits[v][1]
+ }
+ if (mod.x.checked) {
+ var xvar = variables[0]
+ var re = new RegExp(xvar,'g')
+ fn = fn.replace(re,`(${2*origin0}-(${xvar}))`)
+ var dx = mod.shape.limits[0][1]-mod.shape.limits[0][0]
+ var dl = mod.shape.limits[0][0]-origin0
+ limits[0][0] = origin0-(dl+dx)
+ limits[0][1] = origin0-dl
+ }
+ else if (mod.y.checked) {
+ var yvar = variables[1]
+ var re = new RegExp(yvar,'g')
+ fn = fn.replace(re,`(${2*origin0}-(${yvar}))`)
+ var dy = mod.shape.limits[1][1]-mod.shape.limits[1][0]
+ var dl = mod.shape.limits[1][0]-origin0
+ limits[1][0] = origin0-(dl+dy)
+ limits[1][1] = origin0-dl
+ }
+ else if (mod.z.checked) {
+ var zvar = variables[2]
+ var re = new RegExp(zvar,'g')
+ fn = fn.replace(re,`(${2*origin0}-(${zvar}))`)
+ var dz = mod.shape.limits[2][1]-mod.shape.limits[2][0]
+ var dl = mod.shape.limits[2][0]-origin0
+ limits[2][0] = origin0-(dl+dz)
+ limits[2][1] = origin0-dl
+ }
+ else if (mod.xy.checked) {
+ var xvar = variables[0]
+ var yvar = variables[1]
+ var xre = new RegExp(xvar,'g')
+ var yre = new RegExp(yvar,'g')
+ fn = fn.replace(xre,'TEMP')
+ fn = fn.replace(yre,`((${origin1})+(${xvar})-(${origin0}))`)
+ fn = fn.replace(/TEMP/g,`((${origin0})+(${yvar})-(${origin1}))`)
+ var dx = mod.shape.limits[0][1]-mod.shape.limits[0][0]
+ var dy = mod.shape.limits[1][1]-mod.shape.limits[1][0]
+ var dxl = mod.shape.limits[0][0]-origin0
+ var dyl = mod.shape.limits[1][0]-origin1
+ limits[0][0] = origin0+dyl
+ limits[0][1] = origin0+dyl+dy
+ limits[1][0] = origin1+dxl
+ limits[1][1] = origin1+dxl+dx
+ }
+ else if (mod.xz.checked) {
+ var xvar = variables[0]
+ var zvar = variables[2]
+ var xre = new RegExp(xvar,'g')
+ var zre = new RegExp(zvar,'g')
+ fn = fn.replace(xre,'TEMP')
+ fn = fn.replace(zre,`((${origin1})+(${xvar})-(${origin0}))`)
+ fn = fn.replace(/TEMP/g,`((${origin0})+(${zvar})-(${origin1}))`)
+ var dx = mod.shape.limits[0][1]-mod.shape.limits[0][0]
+ var dz = mod.shape.limits[2][1]-mod.shape.limits[2][0]
+ var dxl = mod.shape.limits[0][0]-origin0
+ var dzl = mod.shape.limits[2][0]-origin1
+ limits[0][0] = origin0+dzl
+ limits[0][1] = origin0+dzl+dz
+ limits[2][0] = origin1+dxl
+ limits[2][1] = origin1+dxl+dx
+ }
+ else if (mod.yz.checked) {
+ var yvar = variables[1]
+ var zvar = variables[2]
+ var yre = new RegExp(yvar,'g')
+ var zre = new RegExp(zvar,'g')
+ fn = fn.replace(yre,'TEMP')
+ fn = fn.replace(zre,`((${origin1})+(${yvar})-(${origin0}))`)
+ fn = fn.replace(/TEMP/g,`((${origin0})+(${zvar})-(${origin1}))`)
+ var dy = mod.shape.limits[1][1]-mod.shape.limits[1][0]
+ var dz = mod.shape.limits[2][1]-mod.shape.limits[2][0]
+ var dyl = mod.shape.limits[1][0]-origin0
+ var dzl = mod.shape.limits[2][0]-origin1
+ limits[1][0] = origin0+dzl
+ limits[1][1] = origin0+dzl+dz
+ limits[2][0] = origin1+dyl
+ limits[2][1] = origin1+dyl+dy
+ }
+ var shape = {function:fn,variables:variables,limits:limits,type:type}
+ mods.output(mod,'shape',shape)}
+ }}
+//
+// interface
+//
+var interface = function(div){
+ mod.div = div
+ //
+ // axis
+ //
+ div.appendChild(document.createTextNode('axis: '))
+ div.appendChild(document.createElement('br'))
+ div.appendChild(document.createTextNode('x'))
+ var input = document.createElement('input')
+ input.type = 'radio'
+ input.name = mod.div.id+'axis'
+ input.id = mod.div.id+'x'
+ div.appendChild(input)
+ mod.x = input
+ div.appendChild(document.createTextNode(' y'))
+ var input = document.createElement('input')
+ input.type = 'radio'
+ input.name = mod.div.id+'axis'
+ input.id = mod.div.id+'y'
+ div.appendChild(input)
+ mod.y = input
+ div.appendChild(document.createTextNode(' z'))
+ var input = document.createElement('input')
+ input.type = 'radio'
+ input.name = mod.div.id+'axis'
+ input.id = mod.div.id+'z'
+ div.appendChild(input)
+ mod.z = input
+ div.appendChild(document.createElement('br'))
+ //
+ // origin
+ //
+ div.appendChild(document.createTextNode('origin:'))
+ div.appendChild(document.createElement('br'))
+ div.appendChild(document.createTextNode('x: '))
+ var input = document.createElement('input')
+ input.type = 'text'
+ input.size = 3
+ div.appendChild(input)
+ mod.ox = input
+ div.appendChild(document.createTextNode(' y: '))
+ var input = document.createElement('input')
+ input.type = 'text'
+ input.size = 3
+ div.appendChild(input)
+ mod.oy = input
+ div.appendChild(document.createElement('br'))
+ div.appendChild(document.createTextNode('z: '))
+ var input = document.createElement('input')
+ input.type = 'text'
+ input.size = 3
+ div.appendChild(input)
+ mod.oz = input
+ div.appendChild(document.createElement('br'))
+ //
+ // output button
+ //
+ var btn = document.createElement('button')
+ btn.style.padding = mods.ui.padding
+ btn.style.margin = 1
+ btn.appendChild(document.createTextNode('output'))
+ btn.addEventListener('click',function(){
+ outputs.shape.event()
+ })
+ div.appendChild(btn)
+ }
+//
+// local functions
+//
+;
+//
+// return values
+//
+return ({
+ name:name,
+ init:init,
+ inputs:inputs,
+ outputs:outputs,
+ interface:interface
+ })
+}())
diff --git a/modules/index.js b/modules/index.js
index 40abbae9baa265afc23e9c91b03d1d8635e0496b..8eb59cf8b932ebbcc849311767275b3fd410b2c2 100644
--- a/modules/index.js
+++ b/modules/index.js
@@ -54,6 +54,7 @@ module_menu(' extrude','modules/frep/transforms/extrude')
module_menu(' inflate','modules/frep/transforms/inflate')
module_menu(' reflect','modules/frep/transforms/reflect')
module_menu(' repeat','modules/frep/transforms/repeat')
+module_menu(' revolve','modules/frep/transforms/revolve')
module_menu(' rotate','modules/frep/transforms/rotate')
module_menu(' scale','modules/frep/transforms/scale')
module_menu(' shear','modules/frep/transforms/shear')