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Program.cs
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Program.cs
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/**
* SMuFF-PP - Post processor for GCode files.
* Copyright (C) 2021 Technik Gegg
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Text.RegularExpressions;
using System.Xml;
namespace smuff_pp
{
class Program
{
const string VersionString = "Version 1.0 Beta";
static bool verbose = true;
static double tresholdMin = 0;
static double tresholdMax = 0;
static String purgeCode = null;
static Int32 firstToolChange = 0;
static Int32 relocationsOk = 0;
static Int32 relocationsFailed = 0;
static Int32 toolChanges = 0;
/**
Main program entry point.
Will return 1 if an output file was sucessfully created, a 0 if issues have occured while processing.
*/
static int Main(string[] args)
{
var ci = new CultureInfo("en-US");
CultureInfo.DefaultThreadCurrentCulture = ci; // needed for floating point conversions of the extrusions
Console.WriteLine("==================================================================================================");
Console.WriteLine("SMuFF-PP - GCode post processor for faster multi material printing. Version {0}", VersionString);
Console.WriteLine("==================================================================================================");
if(!ReadSettings(AppContext.BaseDirectory)) {
Console.WriteLine("\nSettings need to be checked! Aborting execution.");
return 0;
}
if(args.Length < 1) {
Console.WriteLine("Missing input file!");
Console.WriteLine("Usage: smuff-pp {input-gcode-file}");
return 0;
}
var inputFile = args[0];
if(verbose) {
Console.WriteLine("Input file: {0}", inputFile);
Console.WriteLine("Purge treshold: {0:N} - {1:N}", tresholdMin, tresholdMax);
}
var outputFile = Path.GetFileNameWithoutExtension(inputFile);
outputFile = outputFile + "_(SMuFF)" + Path.GetExtension(inputFile);
if(ReadInput(inputFile, outputFile)) {
if(verbose) {
Console.WriteLine("\nDone parsing input file, output written to '{0}'.", outputFile);
Console.WriteLine("--------------------------------------------------------------");
Console.WriteLine("Statistics: {0} tool change(s), {1} relocation(s) done, {2} have failed.", toolChanges, relocationsOk, relocationsFailed);
Console.WriteLine("--------------------------------------------------------------");
}
else {
Console.WriteLine("Done.");
}
}
else {
Console.WriteLine("\nErrors encountered while reading '{0}'.", inputFile);
return 0;
}
return 1;
}
/**
Reads the settings from the XML file.
*/
private static bool ReadSettings(String path)
{
var xdoc = new XmlDocument();
var cfgFile = Path.Combine(path, "settings.xml");
if(verbose)
Console.WriteLine("Using configuration from '{0}'.", cfgFile);
try {
xdoc.Load(cfgFile);
var node = xdoc.SelectSingleNode("/root/Verbose");
if(node != null)
Boolean.TryParse(node.InnerText, out verbose);
node = xdoc.SelectSingleNode("/root/TresholdMin");
if(node != null && !String.IsNullOrEmpty(node.InnerText) && !Double.TryParse(node.InnerText, out tresholdMin)) {
Console.WriteLine("Error: Min. treshold value must be a real number (i.e. 202.5)");
return false;
}
node = xdoc.SelectSingleNode("/root/TresholdMax");
if(node != null && !String.IsNullOrEmpty(node.InnerText) && !Double.TryParse(node.InnerText, out tresholdMax)) {
Console.WriteLine("Error: Max. treshold value must be a real number (i.e. 202.5)");
return false;
}
// swap min/max if they seem to be exchanged
if(tresholdMax < tresholdMin) {
var tmp = tresholdMin;
tresholdMin = tresholdMax;
tresholdMax = tmp;
}
// get the GCode used for purging if relocation is no option
node = xdoc.SelectSingleNode("/root/PurgeCode");
if(node != null && !String.IsNullOrEmpty(node.InnerText)) {
purgeCode = String.Format(node.InnerText, tresholdMax);
}
else {
Console.WriteLine("Warning: No Purge GCode assigned!");
}
}
catch(Exception e) {
Console.WriteLine("Error: Can't open the settings file: {0}", e.Message);
return false;
}
return true;
}
/**
Main process.
Parses the input file for tool changes, buffers the GCode and generates the output file.
*/
private static bool ReadInput(String inputFile, String outputFile)
{
Regex toolRx = new Regex(@"^[T]\d(.*)$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
Regex slicerRx = new Regex(@"^(.*?(.enerated\s(with|by))\s(\b.+\b)[^$]*)$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
var gcodeLines = new LinkedList<string>();
try {
using(StreamWriter wr = new StreamWriter(outputFile)) {
try {
Match match;
using (StreamReader sr = new StreamReader(inputFile)) {
string line;
Int32 lineCounter = 0;
do {
line = sr.ReadLine();
if(line == null)
break;
lineCounter++;
// check for Slicer name (Simplify, Prusa or Cura)
match = slicerRx.Match(line);
if(match.Length > 0) {
if(verbose)
Console.WriteLine("Generator: {0}", match.Groups[4].Value);
}
gcodeLines.AddLast(line);
// check for tool change
match = toolRx.Match(line);
if(match.Length > 0) {
if(firstToolChange == 0) {
firstToolChange = lineCounter;
if(verbose)
Console.WriteLine("Printing starts at line {0} with {1}", firstToolChange, match.Value);
}
else {
if(verbose)
Console.WriteLine("Tool change at line {0}: {1}", lineCounter, match.Value);
toolChanges++;
if(gcodeLines.Count > 0) {
ParseBackwards(gcodeLines, lineCounter);
// write lines read into output file
WriteBufferdLines(wr, gcodeLines);
// free memory of the lines buffered so far
gcodeLines = new LinkedList<string>();
}
}
}
} while (line != null);
if(gcodeLines.Count > 0)
WriteBufferdLines(wr, gcodeLines);
}
}
catch (Exception e) {
Console.WriteLine("Error: Can't read the input file: {0}", e.Message);
return false;
}
}
}
catch(Exception e) {
Console.WriteLine("Error: Can't open the output file: {0}", e.Message);
return false;
}
return true;
}
/**
Write the (modified) buffered GCode lines to the output file
*/
private static void WriteBufferdLines(StreamWriter wr, LinkedList<string> gcodeLines)
{
var node = gcodeLines.First;
Int32 linesWritten = 0;
if(gcodeLines == null || node == null)
return;
do {
wr.WriteLine(node.Value);
linesWritten++;
node = node.Next;
} while(node != null);
}
/**
Parse the buffered GCode line by line backwards to calculate the extrusions
and find the best place to relocate the tool change.
*/
private static bool ParseBackwards(LinkedList<string> gcodeLines, Int32 currLine)
{
double extrusion = 0;
Int32 lineNr = currLine-1;
Regex extrusionRx = new Regex(@"[E]([-]\d+.\d+|\d+.\d+)", RegexOptions.Compiled | RegexOptions.IgnoreCase);
Regex featureRx = new Regex(@"^; (feature)\s(\b.*\b)$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
Match match;
var status = false;
LinkedListNode<string> node = gcodeLines.Last.Previous;
LinkedListNode<string> markedNode = null;
var tool = gcodeLines.Last.Value;
do {
var line = node.Value;
// check line for a G1 (either a move or an extrusion)
if(line.StartsWith("G1", StringComparison.InvariantCultureIgnoreCase)) {
// does this G1 have an E parameter?
match = extrusionRx.Match(line);
if(match.Length > 0) {
// yes, it's an extrusion. Add the extrusion amount, then move on parsing
// until a "move only" is found
double val;
if(Double.TryParse(match.Groups[1].Value, out val))
extrusion += val;
}
else {
// no, move only detected (i.e. without E parameter)
// have we reached the treshold value already?
if(extrusion > tresholdMax && markedNode == null) {
// yes, move the tool change command (Tx) into this position
if(verbose)
Console.WriteLine("Relocated {0} to -{1:N4} (Line {2})", tool, extrusion, lineNr);
// marke the node for later on
markedNode = node;
status = true;
}
}
}
// ------------------------------------------------------------------
// look out for a feature "ooze shield" (applies only to Simplify3D sliced files)
// since this is the optimal position for a tool change relocation.
// Won't work for other slicers GCode, since the "ooze shield" feature isn't decalred explicitly.
// ------------------------------------------------------------------
match = featureRx.Match(line);
if(match.Length > 0) {
// found a feature, Group[2] tells of what type the feature is
var type = match.Groups[2].Value;
// only if it's a "ooze shield" and we've reached the minimum treshold...
if(type.Equals("ooze shield") && extrusion >= tresholdMin) {
// relocate the tool change here
if(verbose)
Console.WriteLine("Found feature 'ooze shield' in line {0}. Extrusion now: {1:N4}", lineNr, extrusion);
status = true;
markedNode = node;
break;
}
}
// did we hit a tool change command?
if(line.StartsWith("T", StringComparison.InvariantCultureIgnoreCase)) {
// yes, that's the previous tool change, stop parsing right here
if(verbose)
Console.WriteLine("Running into previous tool change '{0}'.", line);
break;
}
// go to the previous line and continue parsing
node = node.Previous;
lineNr -= 1;
} while(node.Previous != null);
if(status && markedNode != null) {
RelocateToolChange(markedNode, gcodeLines, tool, lineNr);
}
// could the relocation of the tool change be accomplished?
if(!status) {
// nope, we need to purge anyways!
// show a message
if(verbose)
Console.WriteLine("Relocation not possible! Max. extrusion length is: {0:N4}", extrusion);
relocationsFailed++;
// and insert the "Purge Code" is one was given
if(!String.IsNullOrEmpty(purgeCode))
gcodeLines.AddAfter(gcodeLines.Last, purgeCode);
else
gcodeLines.AddAfter(gcodeLines.Last, String.Format("; SMuFF_PP: add your PURGE code [ i.e. M83 E{0:N4} M82 ] here", tresholdMax));
}
return status;
}
/**
Modify the output GCode with an relocated tool change
*/
private static void RelocateToolChange(LinkedListNode<String> node, LinkedList<String> gcodeLines, String tool, Int32 lineNr) {
gcodeLines.AddAfter(node, String.Format("{0}\t; SMuFF_PP: relocated tool change", tool));
gcodeLines.Last.Value = String.Format("; SMuFF_PP: Relocated {0} to line {1}", tool, lineNr);
relocationsOk++;
}
}
}