From ea973abde864dc499363c469381d9d7f343e9321 Mon Sep 17 00:00:00 2001
From: hll <shawn.liu@3ds.com>
Date: Wed, 4 Aug 2021 21:40:20 -0400
Subject: [PATCH] path to hpgl module
---
modules/path/formats/hpgl | 117 ++++++++++++++++++++++++++++++++++++++
1 file changed, 117 insertions(+)
create mode 100644 modules/path/formats/hpgl
diff --git a/modules/path/formats/hpgl b/modules/path/formats/hpgl
new file mode 100644
index 0000000..645469e
--- /dev/null
+++ b/modules/path/formats/hpgl
@@ -0,0 +1,117 @@
+//
+// path to HPGL
+//
+// Neil Gershenfeld
+// (c) Massachusetts Institute of Technology 2021
+//
+// 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 = 'path to HPGL (unfinished)'
+//
+// initialization
+//
+var init = function() {
+ }
+//
+// inputs
+//
+var inputs = {
+ toolpath:{type:'object',
+ event:function(evt){
+ mod.name = evt.detail.name
+ mod.path = evt.detail.path
+ mod.dpi = evt.detail.dpi
+ mod.width = evt.detail.width
+ mod.height = evt.detail.height
+ make_path()
+ }}}
+//
+// outputs
+//
+var outputs = {
+ file:{type:'object',
+ event:function(str){
+ obj = {}
+ obj.name = mod.name+".hpgl"
+ obj.contents = str
+ mods.output(mod,'file',obj)
+ }}}
+//
+// interface
+//
+var interface = function(div){
+ mod.div = div
+ //
+ // display file name
+ //
+ div.appendChild(document.createTextNode(mod.name + '.hpgl'))
+ div.appendChild(document.createElement('br'))
+ }
+//
+// local functions
+//
+function make_path() {
+ var units = 25.4/0.025
+ var dx = units*mod.width/mod.dpi
+ var nx = mod.width
+ var scale = dx/(nx-1)
+ str = "IN;SP1;"
+ //
+ // follow segments
+ //
+ for (var seg = 0; seg < mod.path.length; ++seg) {
+ //
+ // Pen up
+ //
+ x = Math.round(scale * mod.path[seg][0][0])
+ y = Math.round(scale * mod.path[seg][0][1])
+ str += "PU" + x + "," + y + ";PD"
+ //
+ // Pen down
+ //
+ for (var pt = 1; pt < mod.path[seg].length; ++pt) {
+ //
+ // move to next point
+ //
+ x = Math.round(scale * mod.path[seg][pt][0])
+ y = Math.round(scale * mod.path[seg][pt][1])
+ str += x + "," + y
+ pt < (mod.path[seg].length - 1) ? str += "," : str += ";"
+ }
+ }
+ //Move to origin
+ str += "PU0,0;SP0;IN;"
+ //
+ // output file
+ //
+ outputs.file.event(str)
+ }
+//
+// return values
+//
+return ({
+ mod:mod,
+ name:name,
+ init:init,
+ inputs:inputs,
+ outputs:outputs,
+ interface:interface
+ })
+}())
+
--
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