src/cmdparser.cpp (f2cdb52) - dxfngc · BlinkenArea

cmdparser.cpp

/* drawing (DXF) to G-code (NGC) converter
 * Copyright 2013 Stefan Schuermans <stefan@schuermans.info>
 * Copyleft: CC-BY-SA http://creativecommons.org/licenses/by-sa/3.0/
 */

#include <fstream>
#include <iostream>
#include <math.h>
#include <sstream>
#include <string>

#include "cmdparser.h"
#include "drawing.h"
#include "filename.h"
#include "gcode.h"
#include "polygons.h"
#include "settings.h"

/**
 * @brief get layer by name from stream
 * @param[in] strm stream to read layer name from
 * @param[out] name layer name from stream
 * @param[out] layer layer indicated by name from stream
 * @return if layer could be found
 */
bool CmdParser::getLayer(std::istream &strm, std::string &name,
                         const Layer *&layer) const
{
  // get layer name argument
  strm >> name;
  if (strm.fail()) {
    std::cerr << "missing layer name" << std::endl;
    return false;
  }

// get layer
  Drawing::Layers::const_iterator itLayer = mDrawing.mLayers.find(name);
  if (itLayer == mDrawing.mLayers.end()) {
    std::cerr << "layer \"" << name << "\" not found" << std::endl;
    return false;
  }
  layer = &itLayer->second;

return true;
}

/**
 * @brief get layer by name from stream and convert to polygons
 * @param[in] strm stream to read layer name from
 * @param[out] name layer name from stream
 * @param[out] layer layer indicated by name from stream
 * @param[in,out] polys polygons created from layer
 * @return if layer could be found and converted to polygons
 */
bool CmdParser::getLayerPolys(std::istream &strm, std::string &name,
                              const Layer *&layer, Polygons &polys) const
{
  // get layer
  if (!getLayer(strm, name, layer))
    return false;

// convert layer to polygons
  if (!polys.loadLayer(*layer, mSettings.precision)) {
    std::cerr << "cannot convert layer \"" << name << "\" to polygons"
              << std::endl;
    return false;
  }

return true;
}

/**
 * @brief process cmd command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_cmd(std::istream &strm)
{
  // skip whitespace and use rest of line as custom command
  strm >> std::ws;
  std::string cmd;
  getline(strm, cmd);

// add custom command to G-code
  mGCode.appendCustom(cmd);

return true;
}

/**
 * @brief process cut command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_cut(std::istream &strm)
{
  // get layer from arguments
  std::string layerName;
  const Layer *layer;
  if (!getLayer(strm, layerName, layer))
    return false;

// convert layer to G-code
  layer->toGCode(mSettings, mGCode);

return true;
}

/**
 * @brief process cut_inside command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_cut_inside(std::istream &strm)
{
  // get layer from arguments and convert to polygons
  std::string layerName;
  const Layer *layer;
  Polygons polys;
  if (!getLayerPolys(strm, layerName, layer, polys))
    return false;

// inner offset polygons
  Polygons newPolys;
  if (!polys.createInnerOffset(mSettings.tool_diameter * 0.5, newPolys)) {
    std::cerr << "creating inner offset polygons failed" << std::endl;
    return false;
  }

// convert polygons back to layer (containing paths)
  Layer newLayer;
  newPolys.writeToLayer(newLayer);
  newLayer.improvePaths(mSettings.precision);

// convert layer to G-code
  newLayer.toGCode(mSettings, mGCode);

return true;
}

/**
 * @brief process cut_outside command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_cut_outside(std::istream &strm)
{
  // get layer from arguments and convert to polygons
  std::string layerName;
  const Layer *layer;
  Polygons polys;
  if (!getLayerPolys(strm, layerName, layer, polys))
    return false;

// outer offset polygons
  Polygons newPolys;
  if (!polys.createOuterOffset(mSettings.tool_diameter * 0.5, newPolys)) {
    std::cerr << "creating outer offset polygons failed" << std::endl;
    return false;
  }

// convert polygons back to layer (containing paths)
  Layer newLayer;
  newPolys.writeToLayer(newLayer);
  newLayer.improvePaths(mSettings.precision);

// convert layer to G-code
  newLayer.toGCode(mSettings, mGCode);

return true;
}

/**
 * @brief process cut_pocket command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_cut_pocket(std::istream &strm)
{
  // get layer from arguments and convert to polygons
  std::string layerName;
  const Layer *layer;
  Polygons polys;
  if (!getLayerPolys(strm, layerName, layer, polys))
    return false;

// fill insides of polygons by creating inner offset polygons
  Polygons newPolys;
  if (!polys.fillInnerOffset(mSettings.tool_diameter * 0.5, newPolys)) {
    std::cerr << "filling insides of polygons failed" << std::endl;
    return false;
  }

// convert polygons back to layer (containing paths)
  Layer newLayer;
  newPolys.writeToLayer(newLayer);
  newLayer.improvePaths(mSettings.precision);

// convert layer to G-code
  newLayer.toGCode(mSettings, mGCode);

return true;
}

/**
 * @brief process read_dxf command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_read_dxf(std::istream &strm)
{
  // get arguments
  std::string fileName;
  strm >> fileName;
  if (strm.fail()) {
    std::cerr << "missing DXF file name" << std::endl;
    return false;
  }

// re-base DXF file name
  fileName = filename_rebase(fileName, mBaseDir);

// read DXF file
  if (!mDrawing.loadDxf(fileName)) {
    std::cerr << "could not read DXF file \"" << fileName << "\""
              << std::endl;
    return false;
  }

// improve paths in layers
  mDrawing.improvePaths(mSettings.precision);

return true;
}

/**
 * @brief process set_base_z command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_base_z(std::istream &strm)
{
  // get arguments
  double z;
  strm >> z;
  if (strm.fail()) {
    std::cerr << "missing z coordinate" << std::endl;
    return false;
  }

// update settings
  mSettings.base_z = z;
  return true;
}

/**
 * @brief process set_cut_z command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_cut_z(std::istream &strm)
{
  // get arguments
  double z;
  strm >> z;
  if (strm.fail()) {
    std::cerr << "missing z coordinate" << std::endl;
    return false;
  }

// update settings
  mSettings.cut_z = z;
  return true;
}

/**
 * @brief process set_cut_z_step command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_cut_z_step(std::istream &strm)
{
  // get arguments and check them
  double z;
  strm >> z;
  if (strm.fail()) {
    std::cerr << "missing z value" << std::endl;
    return false;
  }
  if (z <= 0.0) {
    std::cerr << "invalid z cut step value (" << z << ")" << std::endl;
    return false;
  }

// update settings
  mSettings.cut_z_step = z;
  return true;
}

/**
 * @brief process set_feed_drill command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_feed_drill(std::istream &strm)
{
  // get arguments and check them
  double feed;
  strm >> feed;
  if (strm.fail()) {
    std::cerr << "missing feed rate" << std::endl;
    return false;
  }
  if (feed <= 0.0) {
    std::cerr << "invalid feed rate (" << feed << ")" << std::endl;
    return false;
  }

// update settings
  mSettings.feed_drill = feed;
  return true;
}

/**
 * @brief process set_feed_mill command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_feed_mill(std::istream &strm)
{
  // get arguments and check them
  double feed;
  strm >> feed;
  if (strm.fail()) {
    std::cerr << "missing feed rate" << std::endl;
    return false;
  }
  if (feed <= 0.0) {
    std::cerr << "invalid feed rate (" << feed << ")" << std::endl;
    return false;
  }

// update settings
  mSettings.feed_mill = feed;
  return true;
}

/**
 * @brief process set_move_z command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_move_z(std::istream &strm)
{
  // get arguments
  double z;
  strm >> z;
  if (strm.fail()) {
    std::cerr << "missing z coordinate" << std::endl;
    return false;
  }

// update settings
  mSettings.move_z = z;
  return true;
}

/**
 * @brief process set_precision command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_precision(std::istream &strm)
{
  // get arguments and check them
  double precision;
  strm >> precision;
  if (strm.fail()) {
    std::cerr << "missing precision" << std::endl;
    return false;
  }
  if (precision < 1.0e-8 || precision > 1.0) {
    std::cerr << "invalid precision (" << precision << ")" << std::endl;
    return false;
  }

// update settings
  mSettings.precision = precision;
  return true;
}

/**
 * @brief process set_tool_diameter command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_set_tool_diameter(std::istream &strm)
{
  // get arguments and check them
  double diameter;
  strm >> diameter;
  if (strm.fail()) {
    std::cerr << "missing tool diameter" << std::endl;
    return false;
  }
  if (diameter < 0.0) {
    std::cerr << "invalid tool diameter (" << diameter << ")" << std::endl;
    return false;
  }

// update settings
  mSettings.tool_diameter = diameter;
  return true;
}

/**
 * @brief process write_ngc command
 * @param[in] strm stream to read command arguments from
 * @return if processing command was successful
 */
bool CmdParser::procCmd_write_ngc(std::istream &strm)
{
  // get arguments
  std::string fileName;
  strm >> fileName;
  if (strm.fail()) {
    std::cerr << "missing NGC file name" << std::endl;
    return false;
  }

// re-base NGC file name
  fileName = filename_rebase(fileName, mBaseDir);

// calculate number of digits after decimal point
  unsigned int digits = (unsigned int)ceil(-log10(mSettings.precision));

// write NGC file
  if (!mGCode.toFile(fileName, digits)) {
    std::cerr << "could not write NGC file \"" << fileName << "\""
              << std::endl;
    return false;
  }

return true;
}

/**
 * @brief process command from line of text
 * @param[in] strLine line containing command to process
 * @return if processing command was successful
 */
bool CmdParser::procLine(const std::string &strLine)
{
  std::stringstream strm(strLine);

// read command
  std::string cmd;
  strm >> cmd;
  if (strm.fail())
    return true; // ignore empty lines

// commands
  if (cmd == "cmd")
    return procCmd_cmd(strm);
  else if (cmd == "cut")
    return procCmd_cut(strm);
  else if (cmd == "cut_inside")
    return procCmd_cut_inside(strm);
  else if (cmd == "cut_outside")
    return procCmd_cut_outside(strm);
  else if (cmd == "cut_pocket")
    return procCmd_cut_pocket(strm);
  else if (cmd == "read_dxf")
    return procCmd_read_dxf(strm);
  else if (cmd == "set_base_z")
    return procCmd_set_base_z(strm);
  else if (cmd == "set_cut_z")
    return procCmd_set_cut_z(strm);
  else if (cmd == "set_cut_z_step")
    return procCmd_set_cut_z_step(strm);
  else if (cmd == "set_feed_drill")
    return procCmd_set_feed_drill(strm);
  else if (cmd == "set_feed_mill")
    return procCmd_set_feed_mill(strm);
  else if (cmd == "set_move_z")
    return procCmd_set_move_z(strm);
  else if (cmd == "set_precision")
    return procCmd_set_precision(strm);
  else if (cmd == "set_tool_diameter")
    return procCmd_set_tool_diameter(strm);
  else if (cmd == "write_ngc")
    return procCmd_write_ngc(strm);
  else {
    std::cerr << "unknown command \"" << cmd << "\"" << std::endl;
    return false;
  }
}

/**
 * @brief process commands from a stream
 * @param[in] strm stream to process
 * @param[in] if processing stream was successful
 * @return if processing commands was successful
 */
bool CmdParser::procStream(std::istream &strm)
{
  unsigned int lineNo = 0;
  while (strm.good()) {

// read line, remove comment
    std::string line;
    std::getline(strm, line);
    std::string::size_type pos = line.find_first_of("#;");
    if (pos != std::string::npos)
      line.erase(pos);
    lineNo++;

// process line
    if (!procLine(line)) {
      std::cerr << "error processing command in line " << lineNo << std::endl;
      return false;
    }

}
  return true;
}

/**
 * @brief process commands from a file
 * @param[in] strFileName name of file to process
 * @param[in] if processing the file was successful
 * @return if processing commands was successful
 */
bool CmdParser::procFile(const std::string &strFileName)
{
  std::ifstream ifstrm(strFileName.c_str(), std::ios::in);
  if (!ifstrm.is_open()) {
    std::cerr << "could not open \"" << strFileName << "\" for reading"
              << std::endl;
    return false;
  }

mBaseDir = filename_get_dir(strFileName);
  bool ret = procStream(ifstrm);
  mBaseDir.clear();
  return ret;
}

dxfngc

improve paths of layers after polygon operations