/
dxf.cpp
1819 lines (1666 loc) · 53.1 KB
/
dxf.cpp
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// dxf.cpp
// Copyright (c) 2009, Dan Heeks
// This program is released under the BSD license. See the file COPYING for details.
#include "dxf.h"
using namespace std;
static const double Pi = 3.14159265358979323846264338327950288419716939937511;
CDxfWrite::CDxfWrite(const char* filepath)
{
// start the file
m_fail = false;
#ifdef __WXMSW__
m_ofs = new ofstream(filepath, ios::out);
#else
m_ofs = new ofstream(filepath, ios::out);
#endif
if(!(*m_ofs)){
m_fail = true;
return;
}
m_ofs->imbue(std::locale("C"));
// start
(*m_ofs) << 0 << endl;
(*m_ofs) << "SECTION" << endl;
(*m_ofs) << 2 << endl;
(*m_ofs) << "ENTITIES" << endl;
}
CDxfWrite::~CDxfWrite()
{
// end
(*m_ofs) << 0 << endl;
(*m_ofs) << "ENDSEC" << endl;
(*m_ofs) << 0 << endl;
(*m_ofs) << "EOF";
delete m_ofs;
}
void CDxfWrite::WriteLine(const double* s, const double* e, const char* layer_name)
{
(*m_ofs) << 0 << endl;
(*m_ofs) << "LINE" << endl;
(*m_ofs) << 8 << endl; // Group code for layer name
(*m_ofs) << layer_name << endl; // Layer number
(*m_ofs) << 10 << endl; // Start point of line
(*m_ofs) << s[0] << endl; // X in WCS coordinates
(*m_ofs) << 20 << endl;
(*m_ofs) << s[1] << endl; // Y in WCS coordinates
(*m_ofs) << 30 << endl;
(*m_ofs) << s[2] << endl; // Z in WCS coordinates
(*m_ofs) << 11 << endl; // End point of line
(*m_ofs) << e[0] << endl; // X in WCS coordinates
(*m_ofs) << 21 << endl;
(*m_ofs) << e[1] << endl; // Y in WCS coordinates
(*m_ofs) << 31 << endl;
(*m_ofs) << e[2] << endl; // Z in WCS coordinates
}
void CDxfWrite::WritePoint(const double* s, const char* layer_name)
{
(*m_ofs) << 0 << endl;
(*m_ofs) << "POINT" << endl;
(*m_ofs) << 8 << endl; // Group code for layer name
(*m_ofs) << layer_name << endl; // Layer number
(*m_ofs) << 10 << endl; // Start point of line
(*m_ofs) << s[0] << endl; // X in WCS coordinates
(*m_ofs) << 20 << endl;
(*m_ofs) << s[1] << endl; // Y in WCS coordinates
(*m_ofs) << 30 << endl;
(*m_ofs) << s[2] << endl; // Z in WCS coordinates
}
void CDxfWrite::WriteArc(const double* s, const double* e, const double* c, bool dir, const char* layer_name)
{
double ax = s[0] - c[0];
double ay = s[1] - c[1];
double bx = e[0] - c[0];
double by = e[1] - c[1];
double start_angle = atan2(ay, ax) * 180/Pi;
double end_angle = atan2(by, bx) * 180/Pi;
double radius = sqrt(ax*ax + ay*ay);
if(!dir){
double temp = start_angle;
start_angle = end_angle;
end_angle = temp;
}
(*m_ofs) << 0 << endl;
(*m_ofs) << "ARC" << endl;
(*m_ofs) << 8 << endl; // Group code for layer name
(*m_ofs) << layer_name << endl; // Layer number
(*m_ofs) << 10 << endl; // Centre X
(*m_ofs) << c[0] << endl; // X in WCS coordinates
(*m_ofs) << 20 << endl;
(*m_ofs) << c[1] << endl; // Y in WCS coordinates
(*m_ofs) << 30 << endl;
(*m_ofs) << c[2] << endl; // Z in WCS coordinates
(*m_ofs) << 40 << endl; //
(*m_ofs) << radius << endl; // Radius
(*m_ofs) << 50 << endl;
(*m_ofs) << start_angle << endl; // Start angle
(*m_ofs) << 51 << endl;
(*m_ofs) << end_angle << endl; // End angle
}
void CDxfWrite::WriteCircle(const double* c, double radius, const char* layer_name)
{
(*m_ofs) << 0 << endl;
(*m_ofs) << "CIRCLE" << endl;
(*m_ofs) << 8 << endl; // Group code for layer name
(*m_ofs) << layer_name << endl; // Layer number
(*m_ofs) << 10 << endl; // Centre X
(*m_ofs) << c[0] << endl; // X in WCS coordinates
(*m_ofs) << 20 << endl;
(*m_ofs) << c[1] << endl; // Y in WCS coordinates
(*m_ofs) << 30 << endl;
(*m_ofs) << c[2] << endl; // Z in WCS coordinates
(*m_ofs) << 40 << endl; //
(*m_ofs) << radius << endl; // Radius
}
void CDxfWrite::WriteEllipse(const double* c, double major_radius, double minor_radius, double rotation, double start_angle, double end_angle, bool dir, const char* layer_name )
{
double m[3];
m[2]=0;
m[0] = major_radius * sin(rotation);
m[1] = major_radius * cos(rotation);
double ratio = minor_radius/major_radius;
if(!dir){
double temp = start_angle;
start_angle = end_angle;
end_angle = temp;
}
(*m_ofs) << 0 << endl;
(*m_ofs) << "ELLIPSE" << endl;
(*m_ofs) << 8 << endl; // Group code for layer name
(*m_ofs) << layer_name << endl; // Layer number
(*m_ofs) << 10 << endl; // Centre X
(*m_ofs) << c[0] << endl; // X in WCS coordinates
(*m_ofs) << 20 << endl;
(*m_ofs) << c[1] << endl; // Y in WCS coordinates
(*m_ofs) << 30 << endl;
(*m_ofs) << c[2] << endl; // Z in WCS coordinates
(*m_ofs) << 40 << endl; //
(*m_ofs) << ratio << endl; // Ratio
(*m_ofs) << 11 << endl; //
(*m_ofs) << m[0] << endl; // Major X
(*m_ofs) << 21 << endl;
(*m_ofs) << m[1] << endl; // Major Y
(*m_ofs) << 31 << endl;
(*m_ofs) << m[2] << endl; // Major Z
(*m_ofs) << 41 << endl;
(*m_ofs) << start_angle << endl; // Start angle
(*m_ofs) << 42 << endl;
(*m_ofs) << end_angle << endl; // End angle
}
CDxfRead::CDxfRead(const char* filepath)
{
// start the file
memset( m_unused_line, '\0', sizeof(m_unused_line) );
m_fail = false;
m_aci = 0;
m_eUnits = eMillimeters;
m_measurement_inch = false;
strcpy(m_layer_name, "0"); // Default layer name
m_ignore_errors = true;
m_ifs = new ifstream(filepath);
if(!(*m_ifs)){
m_fail = true;
printf("DXF file didn't load\n");
return;
}
m_ifs->imbue(std::locale("C"));
}
CDxfRead::~CDxfRead()
{
delete m_ifs;
}
double CDxfRead::mm( double value ) const
{
if(m_measurement_inch)
{
value *= 0.0393700787401575;
}
switch(m_eUnits)
{
case eUnspecified: return(value * 1.0); // We don't know any better.
case eInches: return(value * 25.4);
case eFeet: return(value * 25.4 * 12);
case eMiles: return(value * 1609344.0);
case eMillimeters: return(value * 1.0);
case eCentimeters: return(value * 10.0);
case eMeters: return(value * 1000.0);
case eKilometers: return(value * 1000000.0);
case eMicroinches: return(value * 25.4 / 1000.0);
case eMils: return(value * 25.4 / 1000.0);
case eYards: return(value * 3 * 12 * 25.4);
case eAngstroms: return(value * 0.0000001);
case eNanometers: return(value * 0.000001);
case eMicrons: return(value * 0.001);
case eDecimeters: return(value * 100.0);
case eDekameters: return(value * 10000.0);
case eHectometers: return(value * 100000.0);
case eGigameters: return(value * 1000000000000.0);
case eAstronomicalUnits: return(value * 149597870690000.0);
case eLightYears: return(value * 9454254955500000000.0);
case eParsecs: return(value * 30856774879000000000.0);
default: return(value * 1.0); // We don't know any better.
} // End switch
} // End mm() method
bool CDxfRead::ReadLine()
{
double s[3] = {0, 0, 0};
double e[3] = {0, 0, 0};
bool hidden = false;
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadLine() Failed to read integer from '%s'\n", m_str );
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with line
DerefACI();
OnReadLine(s, e, hidden);
hidden = false;
return true;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 6: // line style name follows
get_line();
if(m_str[0] == 'h' || m_str[0] == 'H')hidden = true;
break;
case 10:
// start x
get_line();
ss.str(m_str); ss >> s[0]; s[0] = mm(s[0]); if(ss.fail()) return false;
break;
case 20:
// start y
get_line();
ss.str(m_str); ss >> s[1]; s[1] = mm(s[1]); if(ss.fail()) return false;
break;
case 30:
// start z
get_line();
ss.str(m_str); ss >> s[2]; s[2] = mm(s[2]); if(ss.fail()) return false;
break;
case 11:
// end x
get_line();
ss.str(m_str); ss >> e[0]; e[0] = mm(e[0]); if(ss.fail()) return false;
break;
case 21:
// end y
get_line();
ss.str(m_str); ss >> e[1]; e[1] = mm(e[1]); if(ss.fail()) return false;
break;
case 31:
// end z
get_line();
ss.str(m_str); ss >> e[2]; e[2] = mm(e[2]); if(ss.fail()) return false;
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 39:
case 210:
case 220:
case 230:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
try {
DerefACI();
OnReadLine(s, e, false);
}
catch(...)
{
if (! IgnoreErrors()) throw; // Re-throw the exception.
}
return false;
}
bool CDxfRead::ReadPoint()
{
double s[3] = {0, 0, 0};
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadPoint() Failed to read integer from '%s'\n", m_str );
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with line
DerefACI();
OnReadPoint(s);
return true;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 10:
// start x
get_line();
ss.str(m_str); ss >> s[0]; s[0] = mm(s[0]); if(ss.fail()) return false;
break;
case 20:
// start y
get_line();
ss.str(m_str); ss >> s[1]; s[1] = mm(s[1]); if(ss.fail()) return false;
break;
case 30:
// start z
get_line();
ss.str(m_str); ss >> s[2]; s[2] = mm(s[2]); if(ss.fail()) return false;
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 39:
case 210:
case 220:
case 230:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
try {
DerefACI();
OnReadPoint(s);
}
catch(...)
{
if (! IgnoreErrors()) throw; // Re-throw the exception.
}
return false;
}
bool CDxfRead::ReadArc()
{
double start_angle = 0.0;// in degrees
double end_angle = 0.0;
double radius = 0.0;
double c[3]; // centre
double z_extrusion_dir = 1.0;
bool hidden = false;
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadArc() Failed to read integer from '%s'\n", m_str);
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with arc
DerefACI();
OnReadArc(start_angle, end_angle, radius, c,z_extrusion_dir, hidden);
hidden = false;
return true;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 6: // line style name follows
get_line();
if(m_str[0] == 'h' || m_str[0] == 'H')hidden = true;
break;
case 10:
// centre x
get_line();
ss.str(m_str); ss >> c[0]; c[0] = mm(c[0]); if(ss.fail()) return false;
break;
case 20:
// centre y
get_line();
ss.str(m_str); ss >> c[1]; c[1] = mm(c[1]); if(ss.fail()) return false;
break;
case 30:
// centre z
get_line();
ss.str(m_str); ss >> c[2]; c[2] = mm(c[2]); if(ss.fail()) return false;
break;
case 40:
// radius
get_line();
ss.str(m_str); ss >> radius; radius = mm(radius); if(ss.fail()) return false;
break;
case 50:
// start angle
get_line();
ss.str(m_str); ss >> start_angle; if(ss.fail()) return false;
break;
case 51:
// end angle
get_line();
ss.str(m_str); ss >> end_angle; if(ss.fail()) return false;
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 39:
case 210:
case 220:
// skip the next line
get_line();
break;
case 230:
//Z extrusion direction for arc
get_line();
ss.str(m_str); ss >> z_extrusion_dir; if(ss.fail()) return false;
break;
default:
// skip the next line
get_line();
break;
}
}
DerefACI();
OnReadArc(start_angle, end_angle, radius, c, z_extrusion_dir, false);
return false;
}
bool CDxfRead::ReadSpline()
{
struct SplineData sd;
sd.norm[0] = 0;
sd.norm[1] = 0;
sd.norm[2] = 1;
sd.degree = 0;
sd.knots = 0;
sd.flag = 0;
sd.control_points = 0;
sd.fit_points = 0;
double temp_double;
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadSpline() Failed to read integer from '%s'\n", m_str);
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with Spline
DerefACI();
OnReadSpline(sd);
return true;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 210:
// normal x
get_line();
ss.str(m_str); ss >> sd.norm[0]; if(ss.fail()) return false;
break;
case 220:
// normal y
get_line();
ss.str(m_str); ss >> sd.norm[1]; if(ss.fail()) return false;
break;
case 230:
// normal z
get_line();
ss.str(m_str); ss >> sd.norm[2]; if(ss.fail()) return false;
break;
case 70:
// flag
get_line();
ss.str(m_str); ss >> sd.flag; if(ss.fail()) return false;
break;
case 71:
// degree
get_line();
ss.str(m_str); ss >> sd.degree; if(ss.fail()) return false;
break;
case 72:
// knots
get_line();
ss.str(m_str); ss >> sd.knots; if(ss.fail()) return false;
break;
case 73:
// control points
get_line();
ss.str(m_str); ss >> sd.control_points; if(ss.fail()) return false;
break;
case 74:
// fit points
get_line();
ss.str(m_str); ss >> sd.fit_points; if(ss.fail()) return false;
break;
case 12:
// starttan x
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.starttanx.push_back(temp_double);
break;
case 22:
// starttan y
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.starttany.push_back(temp_double);
break;
case 32:
// starttan z
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.starttanz.push_back(temp_double);
break;
case 13:
// endtan x
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.endtanx.push_back(temp_double);
break;
case 23:
// endtan y
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.endtany.push_back(temp_double);
break;
case 33:
// endtan z
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.endtanz.push_back(temp_double);
break;
case 40:
// knot
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.knot.push_back(temp_double);
break;
case 41:
// weight
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.weight.push_back(temp_double);
break;
case 10:
// control x
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.controlx.push_back(temp_double);
break;
case 20:
// control y
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.controly.push_back(temp_double);
break;
case 30:
// control z
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.controlz.push_back(temp_double);
break;
case 11:
// fit x
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.fitx.push_back(temp_double);
break;
case 21:
// fit y
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.fity.push_back(temp_double);
break;
case 31:
// fit z
get_line();
ss.str(m_str); ss >> temp_double; temp_double = mm(temp_double); if(ss.fail()) return false;
sd.fitz.push_back(temp_double);
break;
case 42:
case 43:
case 44:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
DerefACI();
OnReadSpline(sd);
return false;
}
bool CDxfRead::ReadCircle()
{
double radius = 0.0;
double c[3]; // centre
bool hidden = false;
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadCircle() Failed to read integer from '%s'\n", m_str);
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with Circle
DerefACI();
OnReadCircle(c, radius, hidden);
hidden = false;
return true;
case 6: // line style name follows
get_line();
if(m_str[0] == 'h' || m_str[0] == 'H')hidden = true;
break;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 10:
// centre x
get_line();
ss.str(m_str); ss >> c[0]; c[0] = mm(c[0]); if(ss.fail()) return false;
break;
case 20:
// centre y
get_line();
ss.str(m_str); ss >> c[1]; c[1] = mm(c[1]); if(ss.fail()) return false;
break;
case 30:
// centre z
get_line();
ss.str(m_str); ss >> c[2]; c[2] = mm(c[2]); if(ss.fail()) return false;
break;
case 40:
// radius
get_line();
ss.str(m_str); ss >> radius; radius = mm(radius); if(ss.fail()) return false;
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 39:
case 210:
case 220:
case 230:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
DerefACI();
OnReadCircle(c, radius, false);
return false;
}
bool CDxfRead::ReadText()
{
double c[3]; // coordinate
double height = 0.03082;
memset( c, 0, sizeof(c) );
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadText() Failed to read integer from '%s'\n", m_str);
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
return false;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 10:
// centre x
get_line();
ss.str(m_str); ss >> c[0]; c[0] = mm(c[0]); if(ss.fail()) return false;
break;
case 20:
// centre y
get_line();
ss.str(m_str); ss >> c[1]; c[1] = mm(c[1]); if(ss.fail()) return false;
break;
case 30:
// centre z
get_line();
ss.str(m_str); ss >> c[2]; c[2] = mm(c[2]); if(ss.fail()) return false;
break;
case 40:
// text height
get_line();
ss.str(m_str); ss >> height; height = mm(height); if(ss.fail()) return false;
break;
case 1:
// text
get_line();
DerefACI();
OnReadText(c, height * 25.4 / 72.0, m_str);
return(true);
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 39:
case 210:
case 220:
case 230:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
return false;
}
bool CDxfRead::ReadEllipse()
{
double c[3]; // centre
double m[3]; //major axis point
double ratio=0; //ratio of major to minor axis
double start=0; //start of arc
double end=0; // end of arc
while(!((*m_ifs).eof()))
{
get_line();
int n;
if(sscanf(m_str, "%d", &n) != 1)
{
printf("CDxfRead::ReadEllipse() Failed to read integer from '%s'\n", m_str);
return false;
}
std::istringstream ss;
ss.imbue(std::locale("C"));
switch(n){
case 0:
// next item found, so finish with Ellipse
DerefACI();
OnReadEllipse(c, m, ratio, start, end);
return true;
case 8: // Layer name follows
get_line();
strcpy(m_layer_name, m_str);
break;
case 10:
// centre x
get_line();
ss.str(m_str); ss >> c[0]; c[0] = mm(c[0]); if(ss.fail()) return false;
break;
case 20:
// centre y
get_line();
ss.str(m_str); ss >> c[1]; c[1] = mm(c[1]); if(ss.fail()) return false;
break;
case 30:
// centre z
get_line();
ss.str(m_str); ss >> c[2]; c[2] = mm(c[2]); if(ss.fail()) return false;
break;
case 11:
// major x
get_line();
ss.str(m_str); ss >> m[0]; m[0] = mm(m[0]); if(ss.fail()) return false;
break;
case 21:
// major y
get_line();
ss.str(m_str); ss >> m[1]; m[1] = mm(m[1]); if(ss.fail()) return false;
break;
case 31:
// major z
get_line();
ss.str(m_str); ss >> m[2]; m[2] = mm(m[2]); if(ss.fail()) return false;
break;
case 40:
// ratio
get_line();
ss.str(m_str); ss >> ratio; if(ss.fail()) return false;
break;
case 41:
// start
get_line();
ss.str(m_str); ss >> start; if(ss.fail()) return false;
break;
case 42:
// end
get_line();
ss.str(m_str); ss >> end; if(ss.fail()) return false;
break;
case 62:
// color index
get_line();
ss.str(m_str); ss >> m_aci; if(ss.fail()) return false;
break;
case 100:
case 210:
case 220:
case 230:
// skip the next line
get_line();
break;
default:
// skip the next line
get_line();
break;
}
}
DerefACI();
OnReadEllipse(c, m, ratio, start, end);
return false;
}
static bool poly_prev_found = false;
static double poly_prev_x;
static double poly_prev_y;
static double poly_prev_z;
static double poly_prev_bulge_found;
static double poly_prev_bulge;
static bool poly_first_found = false;
static double poly_first_x;
static double poly_first_y;
static double poly_first_z;
static void AddPolyLinePoint(CDxfRead* dxf_read, double x, double y, double z, bool bulge_found, double bulge)
{
try {
if(poly_prev_found)
{
bool arc_done = false;
if(poly_prev_bulge_found)
{
double cot = 0.5 * ((1.0 / poly_prev_bulge) - poly_prev_bulge);
double cx = ((poly_prev_x + x) - ((y - poly_prev_y) * cot)) / 2.0;
double cy = ((poly_prev_y + y) + ((x - poly_prev_x) * cot)) / 2.0;
double ps[3] = {poly_prev_x, poly_prev_y, poly_prev_z};
double pe[3] = {x, y, z};
double pc[3] = {cx, cy, (poly_prev_z + z)/2.0};
dxf_read->OnReadArc(ps, pe, pc, poly_prev_bulge >= 0, false);
arc_done = true;
}
if(!arc_done)
{
double s[3] = {poly_prev_x, poly_prev_y, poly_prev_z};
double e[3] = {x, y, z};
dxf_read->OnReadLine(s, e, false);
}
}
poly_prev_found = true;
poly_prev_x = x;
poly_prev_y = y;
poly_prev_z = z;
if(!poly_first_found)
{
poly_first_x = x;
poly_first_y = y;
poly_first_z = z;
poly_first_found = true;
}
poly_prev_bulge_found = bulge_found;
poly_prev_bulge = bulge;
}
catch(...)
{
if (! dxf_read->IgnoreErrors()) throw; // Re-throw it.
}