proj_pt.cpp

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// SPDX-License-Identifier: GPL-2.0-or-later
#include <glib.h>
 
#include "proj_pt.h"
#include "svg/stringstream.h"
 
namespace Proj {
 
Pt2::Pt2(const char *coord_str) {
    if (!coord_str) {
        pt[0] = 0.0;
        pt[1] = 0.0;
        pt[2] = 1.0;
        g_warning ("Coordinate string is empty. Creating default Pt2\n");
        return;
    }
    char **coords = g_strsplit(coord_str, ":", 0);
    if (coords[0] == nullptr || coords[1] == nullptr || coords[2] == nullptr) {
        g_strfreev (coords);
        g_warning ("Malformed coordinate string.\n");
        return;
    }
 
    pt[0] = g_ascii_strtod(coords[0], nullptr);
    pt[1] = g_ascii_strtod(coords[1], nullptr);
    pt[2] = g_ascii_strtod(coords[2], nullptr);
    g_strfreev (coords);
}
 
void
Pt2::normalize() {
    if (fabs(pt[2]) < 1E-6 || pt[2] == 1.0)
        return;
    pt[0] /= pt[2];
    pt[1] /= pt[2];
    pt[2] = 1.0;
}
 
Geom::Point
Pt2::affine() {
  if (fabs(pt[2]) < epsilon) {
    return Geom::Point (Geom::infinity(), Geom::infinity());
  }
  return Geom::Point (pt[0]/pt[2], pt[1]/pt[2]);
}
 
char *
Pt2::coord_string() {
    Inkscape::SVGOStringStream os;
    os << pt[0] << " : "
       << pt[1] << " : "
       << pt[2];
    return g_strdup(os.str().c_str());
}
 
Pt3::Pt3(const char *coord_str) {
    if (!coord_str) {
        pt[0] = 0.0;
        pt[1] = 0.0;
        pt[2] = 0.0;
        pt[3] = 1.0;
        g_warning ("Coordinate string is empty. Creating default Pt2\n");
        return;
    }
    char **coords = g_strsplit(coord_str, ":", 0);
    if (coords[0] == nullptr || coords[1] == nullptr ||
        coords[2] == nullptr || coords[3] == nullptr) {
        g_strfreev (coords);
        g_warning ("Malformed coordinate string.\n");
        return;
    }
 
    pt[0] = g_ascii_strtod(coords[0], nullptr);
    pt[1] = g_ascii_strtod(coords[1], nullptr);
    pt[2] = g_ascii_strtod(coords[2], nullptr);
    pt[3] = g_ascii_strtod(coords[3], nullptr);
}
 
void
Pt3::normalize() {
    if (fabs(pt[3]) < 1E-6 || pt[3] == 1.0)
        return;
    pt[0] /= pt[3];
    pt[1] /= pt[3];
    pt[2] /= pt[3];
    pt[3] = 1.0;
}
 
char *
Pt3::coord_string() {
    Inkscape::SVGOStringStream os;
    os << pt[0] << " : "
       << pt[1] << " : "
       << pt[2] << " : "
       << pt[3];
    return g_strdup(os.str().c_str());
}
 
} // namespace Proj
 
/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8 :