void LC_MakerCamSVG::writeInsert(RS_Insert* insert) {
RS_Block* block = insert->getBlockForInsert();
RS_Vector insertionpoint = convertToSvg(insert->getInsertionPoint());
if (writeBlocksInline) {
RS_DEBUG->print("RS_MakerCamSVG::writeInsert: Writing insert inline ...");
offset.set(insertionpoint.x, insertionpoint.y - (max.y - min.y));
xmlWriter->addElement("g", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("blockname", qPrintable(block->getName()), NAMESPACE_URI_LC);
writeLayers(block);
xmlWriter->closeElement();
offset.set(0, 0);
}
else {
RS_DEBUG->print("RS_MakerCamSVG::writeInsert: Writing insert as reference to block ...");
xmlWriter->addElement("use", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("x", numXml(insertionpoint.x));
xmlWriter->addAttribute("y", numXml(insertionpoint.y - (max.y - min.y)));
xmlWriter->addAttribute("href", "#" + std::to_string(block->getId()), NAMESPACE_URI_XLINK);
xmlWriter->closeElement();
}
}
std::string LC_MakerCamSVG::svgPathArc(RS_Vector point, double radius_x, double radius_y, double x_axis_rotation, bool large_arc_flag, bool sweep_flag) {
return "A" + numXml(radius_x) + "," + numXml(radius_y) + " " +
numXml(x_axis_rotation) + " " +
(large_arc_flag ? "1" : "0") + "," +
(sweep_flag ? "1" : "0") + " " +
numXml(point.x) + "," + numXml(point.y) + " ";
}
void LC_MakerCamSVG::writeCircle(RS_Circle* circle) {
RS_DEBUG->print("RS_MakerCamSVG::writeCircle: Writing circle ...");
RS_Vector center = convertToSvg(circle->getCenter());
xmlWriter->addElement("circle", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("cx", numXml(center.x));
xmlWriter->addAttribute("cy", numXml(center.y));
xmlWriter->addAttribute("r", numXml(circle->getRadius()));
xmlWriter->closeElement();
}
void LC_MakerCamSVG::writeLine(RS_Line* line) {
RS_DEBUG->print("RS_MakerCamSVG::writeLine: Writing line ...");
RS_Vector startpoint = convertToSvg(line->getStartpoint());
RS_Vector endpoint = convertToSvg(line->getEndpoint());
xmlWriter->addElement("line", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("x1", numXml(startpoint.x));
xmlWriter->addAttribute("y1", numXml(startpoint.y));
xmlWriter->addAttribute("x2", numXml(endpoint.x));
xmlWriter->addAttribute("y2", numXml(endpoint.y));
xmlWriter->closeElement();
}
void LC_MakerCamSVG::writePoint(RS_Point* point) {
RS_DEBUG->print("RS_MakerCamSVG::writePoint: Writing point ...");
// NOTE: There is no "point" element in SVG, therefore creating a circle
// with minimal radius.
RS_Vector center = convertToSvg(point->getPos());
xmlWriter->addElement("circle", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("cx", numXml(center.x));
xmlWriter->addAttribute("cy", numXml(center.y));
xmlWriter->addAttribute("r", numXml(0.1));
xmlWriter->closeElement();
}
void LC_MakerCamSVG::write(RS_Graphic* graphic) {
RS_DEBUG->print("RS_MakerCamSVG::write: Writing root node ...");
graphic->calculateBorders();
min = graphic->getMin();
max = graphic->getMax();
RS2::Unit raw_unit = graphic->getUnit();
switch (raw_unit) {
case RS2::Millimeter:
unit = "mm";
break;
case RS2::Centimeter:
unit = "cm";
break;
case RS2::Inch:
unit = "in";
break;
default:
unit = "";
break;
}
xmlWriter->createRootElement("svg", NAMESPACE_URI_SVG);
xmlWriter->addNamespaceDeclaration("lc", NAMESPACE_URI_LC);
xmlWriter->addNamespaceDeclaration("xlink", NAMESPACE_URI_XLINK);
xmlWriter->addAttribute("width", numXml(max.x - min.x) + unit);
xmlWriter->addAttribute("height", numXml(max.y - min.y) + unit);
xmlWriter->addAttribute("viewBox", "0 0 "+ numXml(max.x - min.x) + " " + numXml(max.y - min.y));
writeBlocks(graphic);
writeLayers(graphic);
}
std::string LC_MakerCamSVG::svgPathMoveTo(RS_Vector point) {
return "M" + numXml(point.x) + "," + numXml(point.y) + " ";
}
std::string LC_MakerCamSVG::svgPathCurveTo(RS_Vector point, RS_Vector controlpoint1, RS_Vector controlpoint2) {
return "C" + numXml(controlpoint1.x) + "," + numXml(controlpoint1.y) + " " +
numXml(controlpoint2.x) + "," + numXml(controlpoint2.y) + " " +
numXml(point.x) + "," + numXml(point.y) + " ";
}
void LC_MakerCamSVG::writeEllipse(RS_Ellipse* ellipse) {
RS_Vector center = convertToSvg(ellipse->getCenter());
const RS_Vector centerTranslation=center - ellipse->getCenter();
double majorradius = ellipse->getMajorRadius();
double minorradius = ellipse->getMinorRadius();
if (convertEllipsesToBeziers) {
std::string path = "";
if (ellipse->isArc()) {
const int segments = 4;
RS_DEBUG->print("RS_MakerCamSVG::writeEllipse: Writing ellipse arc approximated by 'path' with %d cubic bézier segments (as discussed in https://www.spaceroots.org/documents/ellipse/elliptical-arc.pdf) ...", segments);
double x_axis_rotation = 2 * M_PI - ellipse->getAngle();
double start_angle = 2 * M_PI - ellipse->getAngle2();
double end_angle = 2 * M_PI - ellipse->getAngle1();
if (ellipse->isReversed()) {
double temp_angle = start_angle;
start_angle = end_angle;
end_angle = temp_angle;
}
if (end_angle <= start_angle) {
end_angle += 2 * M_PI;
}
double total_angle = end_angle - start_angle;
double alpha = calcAlpha(total_angle / segments);
RS_Vector start_point = centerTranslation + ellipse->getEllipsePoint(start_angle);
path = svgPathMoveTo(start_point);
for (int i = 1; i <= segments; i++) {
double segment_start_angle = start_angle + ((i - 1) / (double)segments) * total_angle;
double segment_end_angle = start_angle + (i / (double)segments) * total_angle;
RS_Vector segment_start_point = centerTranslation + ellipse->getEllipsePoint(segment_start_angle);
RS_Vector segment_end_point = centerTranslation + ellipse->getEllipsePoint(segment_end_angle);
RS_Vector segment_control_point_1 = segment_start_point + calcEllipsePointDerivative(majorradius, minorradius, x_axis_rotation, segment_start_angle) * alpha;
RS_Vector segment_control_point_2 = segment_end_point - calcEllipsePointDerivative(majorradius, minorradius, x_axis_rotation, segment_end_angle) * alpha;
path += svgPathCurveTo(segment_end_point, segment_control_point_1, segment_control_point_2);
}
}
else {
RS_DEBUG->print("RS_MakerCamSVG::writeEllipse: Writing ellipse approximated by 'path' with 4 cubic bézier segments (as discussed in http://www.tinaja.com/glib/ellipse4.pdf) ...");
const double kappa = 0.551784;
RS_Vector major {majorradius, 0.0};
RS_Vector minor {0.0, minorradius};
RS_Vector flip_y {1.0, -1.0};
major.rotate(ellipse->getAngle());
minor.rotate(ellipse->getAngle());
major.scale(flip_y);
minor.scale(flip_y);
RS_Vector offsetmajor {major * kappa};
RS_Vector offsetminor {minor * kappa};
path = svgPathMoveTo(center - major) +
svgPathCurveTo((center - minor), (center - major - offsetminor), (center - minor - offsetmajor)) +
svgPathCurveTo((center + major), (center - minor + offsetmajor), (center + major - offsetminor)) +
svgPathCurveTo((center + minor), (center + major + offsetminor), (center + minor + offsetmajor)) +
svgPathCurveTo((center - major), (center + minor - offsetmajor), (center - major + offsetminor)) +
svgPathClose();
}
xmlWriter->addElement("path", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("d", path);
xmlWriter->closeElement();
}
else {
if (ellipse->isArc()) {
RS_DEBUG->print("RS_MakerCamSVG::writeEllipse: Writing ellipse arc as 'path' with arc segments ...");
double x_axis_rotation = 180 - (RS_Math::rad2deg(ellipse->getAngle()));
double startangle = RS_Math::rad2deg(ellipse->getAngle1());
double endangle = RS_Math::rad2deg(ellipse->getAngle2());
if (endangle <= startangle) {
endangle += 360;
}
bool large_arc_flag = ((endangle - startangle) > 180);
bool sweep_flag = false;
if (ellipse->isReversed()) {
large_arc_flag = !large_arc_flag;
sweep_flag = !sweep_flag;
}
std::string path = svgPathMoveTo(convertToSvg(ellipse->getStartpoint())) +
svgPathArc(convertToSvg(ellipse->getEndpoint()), majorradius, minorradius, x_axis_rotation, large_arc_flag, sweep_flag);
xmlWriter->addElement("path", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("d", path);
xmlWriter->closeElement();
}
else {
RS_DEBUG->print("RS_MakerCamSVG::writeEllipse: Writing full ellipse as 'ellipse' ...");
double angle = 180 - (RS_Math::rad2deg(ellipse->getAngle()) - 90);
std::string transform = "translate(" + numXml(center.x) + ", " + numXml(center.y) + ") " +
"rotate(" + numXml(angle) + ")";
xmlWriter->addElement("ellipse", NAMESPACE_URI_SVG);
xmlWriter->addAttribute("rx", numXml(minorradius));
xmlWriter->addAttribute("ry", numXml(majorradius));
xmlWriter->addAttribute("transform", transform);
xmlWriter->closeElement();
}
}
}
std::string LC_MakerCamSVG::lengthXml(double value) const
{
return numXml(lengthFactor*value);
}