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Path.cpp
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Path.cpp
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/***************************************************************************
* Copyright (c) 2014 Yorik van Havre <yorik@uncreated.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library 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 Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
# include <boost/regex.hpp>
#endif
#include <Base/Writer.h>
#include <Base/Reader.h>
#include <Base/Stream.h>
#include <Base/Exception.h>
#include <Base/Console.h>
// KDL stuff - at the moment, not used
//#include "Mod/Robot/App/kdl_cp/path_line.hpp"
//#include "Mod/Robot/App/kdl_cp/path_circle.hpp"
//#include "Mod/Robot/App/kdl_cp/rotational_interpolation_sa.hpp"
//#include "Mod/Robot/App/kdl_cp/utilities/error.h"
#include "Path.h"
#include <Mod/Path/App/PathSegmentWalker.h>
using namespace Path;
using namespace Base;
TYPESYSTEM_SOURCE(Path::Toolpath , Base::Persistence)
Toolpath::Toolpath()
{
}
Toolpath::Toolpath(const Toolpath& otherPath)
: vpcCommands(otherPath.vpcCommands.size())
, center(otherPath.center)
{
*this = otherPath;
recalculate();
}
Toolpath::~Toolpath()
{
clear();
}
Toolpath &Toolpath::operator=(const Toolpath& otherPath)
{
if (this == &otherPath)
return *this;
clear();
vpcCommands.resize(otherPath.vpcCommands.size());
int i = 0;
for (std::vector<Command*>::const_iterator it=otherPath.vpcCommands.begin();it!=otherPath.vpcCommands.end();++it,i++) {
vpcCommands[i] = new Command(**it);
}
center = otherPath.center;
recalculate();
return *this;
}
void Toolpath::clear(void)
{
for(std::vector<Command*>::iterator it = vpcCommands.begin();it!=vpcCommands.end();++it)
delete ( *it );
vpcCommands.clear();
recalculate();
}
void Toolpath::addCommand(const Command &Cmd)
{
Command *tmp = new Command(Cmd);
vpcCommands.push_back(tmp);
recalculate();
}
void Toolpath::insertCommand(const Command &Cmd, int pos)
{
if (pos == -1) {
addCommand(Cmd);
} else if (pos <= static_cast<int>(vpcCommands.size())) {
Command *tmp = new Command(Cmd);
vpcCommands.insert(vpcCommands.begin()+pos,tmp);
} else {
throw Base::IndexError("Index not in range");
}
recalculate();
}
void Toolpath::deleteCommand(int pos)
{
if (pos == -1) {
//delete(*vpcCommands.rbegin()); // causes crash
vpcCommands.pop_back();
} else if (pos <= static_cast<int>(vpcCommands.size())) {
vpcCommands.erase (vpcCommands.begin()+pos);
} else {
throw Base::IndexError("Index not in range");
}
recalculate();
}
double Toolpath::getLength()
{
if(vpcCommands.size()==0)
return 0;
double l = 0;
Vector3d last(0,0,0);
Vector3d next;
for(std::vector<Command*>::const_iterator it = vpcCommands.begin();it!=vpcCommands.end();++it) {
std::string name = (*it)->Name;
next = (*it)->getPlacement(last).getPosition();
if ( (name == "G0") || (name == "G00") || (name == "G1") || (name == "G01") ) {
// straight line
l += (next - last).Length();
last = next;
} else if ( (name == "G2") || (name == "G02") || (name == "G3") || (name == "G03") ) {
// arc
Vector3d center = (*it)->getCenter();
double radius = (last - center).Length();
double angle = (next - center).GetAngle(last - center);
l += angle * radius;
last = next;
}
}
return l;
}
double Toolpath::getCycleTime(double hFeed, double vFeed, double hRapid, double vRapid)
{
// check the feedrates are set
if ((hFeed == 0) || (vFeed == 0)){
Base::Console().Warning("Feed Rate Error: Check Tool Controllers have Feed Rates");
return 0;
}
if (hRapid == 0){
hRapid = hFeed;
}
if (vRapid == 0){
vRapid = vFeed;
}
if(vpcCommands.size()==0)
return 0;
double l = 0;
double time = 0;
bool verticalMove = false;
Vector3d last(0,0,0);
Vector3d next;
for(std::vector<Command*>::const_iterator it = vpcCommands.begin();it!=vpcCommands.end();++it) {
std::string name = (*it)->Name;
float feedrate = (*it)->getParam("F");
l = 0;
verticalMove = false;
feedrate = hFeed;
next = (*it)->getPlacement(last).getPosition();
if (last.z != next.z){
verticalMove = true;
feedrate = vFeed;
}
if ((name == "G0") || (name == "G00")){
// Rapid Move
l += (next - last).Length();
feedrate = hRapid;
if(verticalMove){
feedrate = vRapid;
}
}else if ((name == "G1") || (name == "G01")) {
// Feed Move
l += (next - last).Length();
}else if ((name == "G2") || (name == "G02") || (name == "G3") || (name == "G03") ) {
// Arc Move
Vector3d center = (*it)->getCenter();
double radius = (last - center).Length();
double angle = (next - center).GetAngle(last - center);
l += angle * radius;
}
time += l / feedrate;
last = next;
}
return time;
}
class BoundBoxSegmentVisitor : public PathSegmentVisitor
{
public:
BoundBoxSegmentVisitor()
{ }
virtual void g0(int id, const Base::Vector3d &last, const Base::Vector3d &next, const std::deque<Base::Vector3d> &pts)
{
(void)id;
processPt(last);
processPts(pts);
processPt(next);
}
virtual void g1(int id, const Base::Vector3d &last, const Base::Vector3d &next, const std::deque<Base::Vector3d> &pts)
{
(void)id;
processPt(last);
processPts(pts);
processPt(next);
}
virtual void g23(int id, const Base::Vector3d &last, const Base::Vector3d &next, const std::deque<Base::Vector3d> &pts, const Base::Vector3d ¢er)
{
(void)id;
(void)center;
processPt(last);
processPts(pts);
processPt(next);
}
virtual void g8x(int id, const Base::Vector3d &last, const Base::Vector3d &next, const std::deque<Base::Vector3d> &pts,
const std::deque<Base::Vector3d> &p, const std::deque<Base::Vector3d> &q)
{
(void)id;
(void)q; // always within the bounds of p
processPt(last);
processPts(pts);
processPts(p);
processPt(next);
}
virtual void g38(int id, const Base::Vector3d &last, const Base::Vector3d &next)
{
(void)id;
processPt(last);
processPt(next);
}
Base::BoundBox3d bb;
private:
void processPts(const std::deque<Base::Vector3d> &pts) {
for (std::deque<Base::Vector3d>::const_iterator it=pts.begin(); pts.end() != it; ++it) {
processPt(*it);
}
}
void processPt(const Base::Vector3d &pt) {
bb.MaxX = std::max(bb.MaxX, pt.x);
bb.MinX = std::min(bb.MinX, pt.x);
bb.MaxY = std::max(bb.MaxY, pt.y);
bb.MinY = std::min(bb.MinY, pt.y);
bb.MaxZ = std::max(bb.MaxZ, pt.z);
bb.MinZ = std::min(bb.MinZ, pt.z);
}
};
Base::BoundBox3d Toolpath::getBoundBox() const
{
BoundBoxSegmentVisitor visitor;
PathSegmentWalker walker(*this);
walker.walk(visitor, Vector3d(0, 0, 0));
return visitor.bb;
}
static void bulkAddCommand(const std::string &gcodestr, std::vector<Command*> &commands, bool &inches)
{
Command *cmd = new Command();
cmd->setFromGCode(gcodestr);
if ("G20" == cmd->Name) {
inches = true;
delete cmd;
} else if ("G21" == cmd->Name) {
inches = false;
delete cmd;
} else {
if (inches) {
cmd->scaleBy(25.4);
}
commands.push_back(cmd);
}
}
void Toolpath::setFromGCode(const std::string instr)
{
clear();
// remove comments
//boost::regex e("\\(.*?\\)");
//std::string str = boost::regex_replace(instr, e, "");
std::string str(instr);
// split input string by () or G or M commands
std::string mode = "command";
std::size_t found = str.find_first_of("(gGmM");
int last = -1;
bool inches = false;
while (found != std::string::npos)
{
if (str[found] == '(') {
// start of comment
if ( (last > -1) && (mode == "command") ) {
// before opening a comment, add the last found command
std::string gcodestr = str.substr(last, found-last);
bulkAddCommand(gcodestr, vpcCommands, inches);
}
mode = "comment";
last = found;
found = str.find_first_of(')', found+1);
} else if (str[found] == ')') {
// end of comment
std::string gcodestr = str.substr(last, found-last+1);
bulkAddCommand(gcodestr, vpcCommands, inches);
last = -1;
found = str.find_first_of("(gGmM", found+1);
mode = "command";
} else if (mode == "command") {
// command
if (last > -1) {
std::string gcodestr = str.substr(last, found-last);
bulkAddCommand(gcodestr, vpcCommands, inches);
}
last = found;
found = str.find_first_of("(gGmM", found+1);
}
}
// add the last command found, if any
if (last > -1) {
if (mode == "command") {
std::string gcodestr = str.substr(last,std::string::npos);
bulkAddCommand(gcodestr, vpcCommands, inches);
}
}
recalculate();
}
std::string Toolpath::toGCode(void) const
{
std::string result;
for (std::vector<Command*>::const_iterator it=vpcCommands.begin();it!=vpcCommands.end();++it) {
result += (*it)->toGCode();
result += "\n";
}
return result;
}
void Toolpath::recalculate(void) // recalculates the path cache
{
if(vpcCommands.size()==0)
return;
// TODO recalculate the KDL stuff. At the moment, this is unused.
#if 0
// delete the old and create a new one
if(pcPath)
delete (pcPath);
pcPath = new KDL::Path_Composite();
KDL::Path *tempPath;
KDL::Frame Last;
try {
// handle the first waypoint differently
bool first=true;
for(std::vector<Command*>::const_iterator it = vpcCommands.begin();it!=vpcCommands.end();++it) {
if(first){
Last = toFrame((*it)->getPlacement());
first = false;
}else{
Base::Placement p = (*it)->getPlacement();
KDL::Frame Next = toFrame(p);
std::string name = (*it)->Name;
Vector3d zaxis(0,0,1);
if ( (name == "G0") || (name == "G1") || (name == "G01") ) {
// line segment
tempPath = new KDL::Path_Line(Last, Next, new KDL::RotationalInterpolation_SingleAxis(), 1.0, true);
pcPath->Add(tempPath);
Last = Next;
} else if ( (name == "G2") || (name == "G02") ) {
// clockwise arc
Vector3d fcenter = (*it)->getCenter();
KDL::Vector center(fcenter.x,fcenter.y,fcenter.z);
Vector3d fnorm;
p.getRotation().multVec(zaxis,fnorm);
KDL::Vector norm(fnorm.x,fnorm.y,fnorm.z);
Vector3d fstart = toPlacement(Last).getPosition();
Vector3d fend = toPlacement(Last).getPosition();
Rotation frot(fstart-fcenter,fend-fcenter);
double q0,q1,q2,q3;
frot.getValue(q0,q1,q2,q3);
KDL::Rotation rot;
rot.Quaternion(q0,q1,q2,q3);
tempPath = new KDL::Path_Circle(Last, center, norm, rot, 0.0, new KDL::RotationalInterpolation_SingleAxis(), 1.0, true);
pcPath->Add(tempPath);
Last = Next;
}
}
}
} catch (KDL::Error &e) {
throw Base::RuntimeError(e.Description());
}
#endif
}
// reimplemented from base class
unsigned int Toolpath::getMemSize (void) const
{
return toGCode().size();
}
void Toolpath::setCenter(const Base::Vector3d &c)
{
center = c;
recalculate();
}
static void saveCenter(Writer &writer, const Base::Vector3d ¢er)
{
writer.Stream() << writer.ind() << "<Center x=\"" << center.x << "\" y=\"" << center.y << "\" z=\"" << center.z << "\"/>" << std::endl;
}
void Toolpath::Save (Writer &writer) const
{
if (writer.isForceXML()) {
writer.Stream() << writer.ind() << "<Path count=\"" << getSize() << "\" version=\"" << SchemaVersion << "\">" << std::endl;
writer.incInd();
saveCenter(writer, center);
for(unsigned int i = 0; i < getSize(); i++) {
vpcCommands[i]->Save(writer);
}
writer.decInd();
} else {
writer.Stream() << writer.ind()
<< "<Path file=\"" << writer.addFile((writer.ObjectName+".nc").c_str(), this) << "\" version=\"" << SchemaVersion << "\">" << std::endl;
writer.incInd();
saveCenter(writer, center);
writer.decInd();
}
writer.Stream() << writer.ind() << "</Path>" << std::endl;
}
void Toolpath::SaveDocFile (Base::Writer &writer) const
{
if (toGCode().empty())
return;
writer.Stream() << toGCode();
}
void Toolpath::Restore(XMLReader &reader)
{
reader.readElement("Path");
std::string file (reader.getAttribute("file") );
if (!file.empty()) {
// initiate a file read
reader.addFile(file.c_str(),this);
}
}
void Toolpath::RestoreDocFile(Base::Reader &reader)
{
std::string gcode;
std::string line;
while (reader >> line) {
gcode += line;
gcode += " ";
}
setFromGCode(gcode);
}