DLL_PUBLIC double CDECL area(ClipperLib::IntPoint* path, size_t count) {
ClipperLib::Path v = ClipperLib::Path();
for(size_t i = 0; i < count; i++) {
v.emplace(v.end(), path[i].X, path[i].Y);
}
return ClipperLib::Area(v);
}
void
Slic3rMultiPoint_to_ClipperPath(const Slic3r::MultiPoint &input, ClipperLib::Path &output)
{
output.clear();
for (Slic3r::Points::const_iterator pit = input.points.begin(); pit != input.points.end(); ++pit) {
output.push_back(ClipperLib::IntPoint( (*pit).x, (*pit).y ));
}
}
//==============================================================
// Static functions
//==============================================================
DLL_PUBLIC bool CDECL orientation(ClipperLib::IntPoint* path, size_t count) {
ClipperLib::Path v = ClipperLib::Path();
for(size_t i = 0; i < count; i++) {
v.emplace(v.end(), path[i].X, path[i].Y);
}
return ClipperLib::Orientation(v);
}
void
ClipperPath_to_Slic3rMultiPoint(const ClipperLib::Path &input, T &output)
{
output.points.clear();
for (ClipperLib::Path::const_iterator pit = input.begin(); pit != input.end(); ++pit) {
output.points.push_back(Slic3r::Point( (*pit).X, (*pit).Y ));
}
}
static ClipperLib::Path toClipperPath(const GeometryCoordinates& ring) {
ClipperLib::Path result;
result.reserve(ring.size());
for (const auto& p : ring) {
result.emplace_back(p.x, p.y);
}
return result;
}
Vector<Vector2> expand(const Vector<Vector2> &points, const Rect2i &rect, float epsilon = 2.0) {
int size = points.size();
ERR_FAIL_COND_V(size < 2, Vector<Vector2>());
ClipperLib::Path subj;
ClipperLib::PolyTree solution;
ClipperLib::PolyTree out;
for (int i = 0; i < points.size(); i++) {
subj << ClipperLib::IntPoint(points[i].x * PRECISION, points[i].y * PRECISION);
}
ClipperLib::ClipperOffset co;
co.AddPath(subj, ClipperLib::jtMiter, ClipperLib::etClosedPolygon);
co.Execute(solution, epsilon * PRECISION);
ClipperLib::PolyNode *p = solution.GetFirst();
ERR_FAIL_COND_V(!p, points);
while (p->IsHole()) {
p = p->GetNext();
}
//turn the result into simply polygon (AKA, fix overlap)
//clamp into the specified rect
ClipperLib::Clipper cl;
cl.StrictlySimple(true);
cl.AddPath(p->Contour, ClipperLib::ptSubject, true);
//create the clipping rect
ClipperLib::Path clamp;
clamp.push_back(ClipperLib::IntPoint(0, 0));
clamp.push_back(ClipperLib::IntPoint(rect.size.width * PRECISION, 0));
clamp.push_back(ClipperLib::IntPoint(rect.size.width * PRECISION, rect.size.height * PRECISION));
clamp.push_back(ClipperLib::IntPoint(0, rect.size.height * PRECISION));
cl.AddPath(clamp, ClipperLib::ptClip, true);
cl.Execute(ClipperLib::ctIntersection, out);
Vector<Vector2> outPoints;
ClipperLib::PolyNode *p2 = out.GetFirst();
while (p2->IsHole()) {
p2 = p2->GetNext();
}
int lasti = p2->Contour.size() - 1;
Vector2 prev = Vector2(p2->Contour[lasti].X / PRECISION, p2->Contour[lasti].Y / PRECISION);
for (unsigned int i = 0; i < p2->Contour.size(); i++) {
Vector2 cur = Vector2(p2->Contour[i].X / PRECISION, p2->Contour[i].Y / PRECISION);
if (cur.distance_to(prev) > 0.5) {
outPoints.push_back(cur);
prev = cur;
}
}
return outPoints;
}
void
ClipperPath_to_Slic3rMultiPoint(const ClipperLib::Path &input, T* output)
{
PROFILE_FUNC();
output->points.clear();
output->points.reserve(input.size());
for (ClipperLib::Path::const_iterator pit = input.begin(); pit != input.end(); ++pit)
output->points.push_back(Slic3r::Point( (*pit).X, (*pit).Y ));
}
std::vector<Vec2> AutoPolygon::expand(const std::vector<Vec2>& points, const cocos2d::Rect &rect, const float& epsilon)
{
auto size = points.size();
// if there are less than 3 points, then we have nothing
if(size<3)
{
log("AUTOPOLYGON: cannot expand points for %s with less than 3 points, e: %f", _filename.c_str(), epsilon);
return std::vector<Vec2>();
}
ClipperLib::Path subj;
ClipperLib::PolyTree solution;
ClipperLib::PolyTree out;
for(std::vector<Vec2>::const_iterator it = points.begin(); it<points.end(); it++)
{
subj << ClipperLib::IntPoint(it-> x* PRECISION, it->y * PRECISION);
}
ClipperLib::ClipperOffset co;
co.AddPath(subj, ClipperLib::jtMiter, ClipperLib::etClosedPolygon);
co.Execute(solution, epsilon * PRECISION);
ClipperLib::PolyNode* p = solution.GetFirst();
if(!p)
{
log("AUTOPOLYGON: Clipper failed to expand the points");
return points;
}
while(p->IsHole()){
p = p->GetNext();
}
//turn the result into simply polygon (AKA, fix overlap)
//clamp into the specified rect
ClipperLib::Clipper cl;
cl.StrictlySimple(true);
cl.AddPath(p->Contour, ClipperLib::ptSubject, true);
//create the clipping rect
ClipperLib::Path clamp;
clamp.push_back(ClipperLib::IntPoint(0, 0));
clamp.push_back(ClipperLib::IntPoint(rect.size.width/_scaleFactor * PRECISION, 0));
clamp.push_back(ClipperLib::IntPoint(rect.size.width/_scaleFactor * PRECISION, rect.size.height/_scaleFactor * PRECISION));
clamp.push_back(ClipperLib::IntPoint(0, rect.size.height/_scaleFactor * PRECISION));
cl.AddPath(clamp, ClipperLib::ptClip, true);
cl.Execute(ClipperLib::ctIntersection, out);
std::vector<Vec2> outPoints;
ClipperLib::PolyNode* p2 = out.GetFirst();
while(p2->IsHole()){
p2 = p2->GetNext();
}
auto end = p2->Contour.end();
for(std::vector<ClipperLib::IntPoint>::const_iterator pt = p2->Contour.begin(); pt < end; pt++)
{
outPoints.push_back(Vec2(pt->X/PRECISION, pt->Y/PRECISION));
}
return outPoints;
}
ClipperLib::Path polygon::path(base_int denom) const
{
ClipperLib::Path ret;
for(auto v : this->vertexes)
{
ret.push_back(ClipperLib::IntPoint((ClipperLib::cInt)(v.x.numerator() * (denom / v.x.denominator())), (ClipperLib::cInt)(v.y.numerator() * (denom / v.y.denominator()))));
}
return ret;
}
ClipperLib::Path
Slic3rMultiPoint_to_ClipperPath_reversed(const Slic3r::MultiPoint &input)
{
ClipperLib::Path output;
output.reserve(input.points.size());
for (Slic3r::Points::const_reverse_iterator pit = input.points.rbegin(); pit != input.points.rend(); ++pit)
output.emplace_back((*pit)(0), (*pit)(1));
return output;
}
void unscaleClipperPolygon(ClipperLib::Path &polygon)
{
PROFILE_FUNC();
for (ClipperLib::Path::iterator pit = polygon.begin(); pit != polygon.end(); ++pit) {
pit->X += CLIPPER_OFFSET_SCALE_ROUNDING_DELTA;
pit->Y += CLIPPER_OFFSET_SCALE_ROUNDING_DELTA;
pit->X >>= CLIPPER_OFFSET_POWER_OF_2;
pit->Y >>= CLIPPER_OFFSET_POWER_OF_2;
}
}
std::string
SVG::get_path_d(const ClipperLib::Path &path, double scale, bool closed) const
{
std::ostringstream d;
d << "M ";
for (ClipperLib::Path::const_iterator p = path.begin(); p != path.end(); ++p) {
d << COORD(scale * p->X - origin.x) << " ";
d << COORD(scale * p->Y - origin.y) << " ";
}
if (closed) d << "z";
return d.str();
}
ClipperLib::Path Clipper::toClipper(const ofPolyline& polyline,
ClipperLib::cInt scale)
{
ClipperLib::Path path;
for (auto& vertex: polyline.getVertices())
{
path.push_back(toClipper(vertex, scale));
}
return path;
}
void Grasp_Calculator::path_to_double_polygon(DPolygon2D &double_polygon, ClipperLib::Path int_polygon)
{
ClipperLib::cInt factor = 100000;
double_polygon.clear();
for (std::vector<IntPoint>::iterator ip = int_polygon.begin(); ip != int_polygon.end(); ++ip)
{
DoublePoint2D d2p;
d2p.x = ((double)ip->X) / factor;
d2p.y = ((double)ip->Y) / factor;
double_polygon.push_back(d2p);
}
}
DLL_PUBLIC void CDECL add_offset_path(ClipperLib::ClipperOffset *ptr, ClipperLib::IntPoint* path, size_t count,
ClipperLib::JoinType joinType, ClipperLib::EndType endType) {
ClipperLib::Path v = ClipperLib::Path();
for(size_t i = 0; i < count; i++) {
v.emplace(v.end(), path[i].X, path[i].Y);
}
try {
ptr->AddPath(v, joinType, endType);
} catch(ClipperLib::clipperException e) {
printf(e.what());
}
}
DLL_PUBLIC bool CDECL add_path(ClipperLib::Clipper *ptr, ClipperLib::IntPoint* path, size_t count, ClipperLib::PolyType polyType, bool closed) {
ClipperLib::Path v = ClipperLib::Path();
for(size_t i = 0; i < count; i++) {
v.emplace(v.end(), path[i].X, path[i].Y);
}
bool result = false;
try {
result = ptr->AddPath(v, polyType, closed);
} catch(ClipperLib::clipperException e) {
printf(e.what());
}
return result;
}
// Set the objects (defined by contour points) to be models in the world and scene.
void World::setObjectsToBeModeled(const std::vector<std::vector<cv::Point>> contours) {
int contourSize = (int)contours.size();
for(int i = 0; i < contourSize; i++ )
{
std::vector<cv::Point> currentShape = contours[i];
int numOfPoints = (int)currentShape.size();
b2Vec2 * vertices = new b2Vec2[numOfPoints];
ClipperLib::Paths* polygons = new ClipperLib::Paths();
ClipperLib::Path polygon;
for (int j = 0; j < numOfPoints; j++)
{
vertices[j].x = currentShape[j].x / PTM_RATIO;
vertices[j].y = currentShape[j].y / PTM_RATIO;
//cv::line(m_scene, currentShape[j], currentShape[(j + 1) % numOfPoints], cv::Scalar(0,0,255));
//std::cout << "[" << vertices[j].x << "," <<vertices[j].y << "]" << std::endl;
polygon.push_back(ClipperLib::IntPoint(currentShape[j].x, currentShape[j].y));
}
b2BodyDef objectBodyDef;
objectBodyDef.type = b2_staticBody;
b2Body *objectBody = m_world->CreateBody(&objectBodyDef);
objectBody->SetUserData(polygons);
polygons->push_back(polygon);
b2EdgeShape objectEdgeShape;
b2FixtureDef objectShapeDef;
objectShapeDef.shape = &objectEdgeShape;
for (int j = 0; j < numOfPoints - 1; j++)
{
objectEdgeShape.Set(vertices[j], vertices[j+1]);
objectBody->CreateFixture(&objectShapeDef);
}
objectEdgeShape.Set(vertices[numOfPoints - 1], vertices[0]);
objectBody->CreateFixture(&objectShapeDef);
m_objectBodies.push_back(objectBody);
delete[] vertices;
}
}
ClipperLib::Path pathToClipperPath(const panda::types::Path& path)
{
ClipperLib::Path out;
auto maxVal = std::numeric_limits<ClipperLib::cInt>::max();
ClipperLib::IntPoint prevPt(maxVal, maxVal);
for (const auto& pt : path.points)
{
auto newPt = convert(pt);
if (newPt == prevPt)
continue;
out.push_back(newPt);
prevPt = newPt;
}
if (path.points.size() > 1 && path.points.back() == path.points.front())
out.pop_back();
return out;
}
void BooleanTool::rebuildCoordinate(
ClipperLib::Path::size_type index,
const ClipperLib::Path& polygon,
const PolyMap& polymap,
PathObject* object,
bool start_new_part)
{
MapCoord coord(0.001 * polygon.at(index).X, 0.001 * polygon.at(index).Y);
if (polymap.contains(polygon.at(index)))
{
PathCoordInfo info = polymap.value(polygon.at(index));
MapCoord& original = info.first->path->getCoordinate(info.second->index);
if (original.isDashPoint())
coord.setDashPoint(true);
}
object->addCoordinate(coord, start_new_part);
}
ClipperLib::Path ElementGeometryClipper::createPathFromBoundingBox()
{
double xMin = quadKeyBbox_.minPoint.longitude, yMin = quadKeyBbox_.minPoint.latitude,
xMax = quadKeyBbox_.maxPoint.longitude, yMax = quadKeyBbox_.maxPoint.latitude;
ClipperLib::Path rect;
rect.push_back(ClipperLib::IntPoint(static_cast<ClipperLib::cInt>(xMin*Scale),
static_cast<ClipperLib::cInt>(yMin*Scale)));
rect.push_back(ClipperLib::IntPoint(static_cast<ClipperLib::cInt>(xMax*Scale),
static_cast<ClipperLib::cInt>(yMin*Scale)));
rect.push_back(ClipperLib::IntPoint(static_cast<ClipperLib::cInt>(xMax*Scale),
static_cast<ClipperLib::cInt>(yMax*Scale)));
rect.push_back(ClipperLib::IntPoint(static_cast<ClipperLib::cInt>(xMin*Scale),
static_cast<ClipperLib::cInt>(yMax*Scale)));
return std::move(rect);
}
panda::types::Path clipperPathToPath(const ClipperLib::Path& path)
{
panda::types::Path out;
if (path.empty())
return out;
for (const auto& pt : path)
out.points.push_back(convert(pt));
if (out.points.front() != out.points.back())
out.points.push_back(out.points.front());
return out;
}
static GeometryCoordinates fromClipperPath(const ClipperLib::Path& path) {
GeometryCoordinates result;
result.reserve(path.size() + 1);
result.reserve(path.size());
for (const auto& p : path) {
using Coordinate = GeometryCoordinates::coordinate_type;
assert(p.x >= std::numeric_limits<Coordinate>::min());
assert(p.x <= std::numeric_limits<Coordinate>::max());
assert(p.y >= std::numeric_limits<Coordinate>::min());
assert(p.y <= std::numeric_limits<Coordinate>::max());
result.emplace_back(Coordinate(p.x), Coordinate(p.y));
}
// Clipper does not repeat initial point, but our geometry model requires it.
if (!result.empty()) {
result.push_back(result.front());
}
return result;
}
void Polygon2d_TestModule()
{
// "This structure contains a sequence of IntPoint vertices defining a
// single contour"
ClipperLib::Path aPath;
SEGMENTS aSegments;
aPath.resize( 4 );
aPath[0] = ClipperLib::IntPoint( -2, -2 );
aPath[1] = ClipperLib::IntPoint( 2, -2 );
aPath[2] = ClipperLib::IntPoint( 2, 2 );
aPath[3] = ClipperLib::IntPoint( -2, 2 );
// It must be an outter polygon
wxASSERT( ClipperLib::Orientation( aPath ) );
polygon_Convert( aPath, aSegments, 1.0f );
wxASSERT( aPath.size() == aSegments.size() );
wxASSERT( aSegments[0].m_Start == SFVEC2F( -2.0f, 2.0f ) );
wxASSERT( aSegments[1].m_Start == SFVEC2F( 2.0f, 2.0f ) );
wxASSERT( aSegments[2].m_Start == SFVEC2F( 2.0f, -2.0f ) );
wxASSERT( aSegments[3].m_Start == SFVEC2F( -2.0f, -2.0f ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( 0.0f, 0.0f ) ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( -1.9f, -1.9f ) ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( -1.9f, 1.9f ) ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( 1.9f, 1.9f ) ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( 1.9f, -1.9f ) ) );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( -2.1f, -2.0f ) ) == false );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( -2.1f, 2.0f ) ) == false );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( 2.1f, 2.0f ) ) == false );
wxASSERT( polygon_IsPointInside( aSegments, SFVEC2F( 2.1f, -2.0f ) ) == false );
}
static void polygon_Convert( const ClipperLib::Path &aPath,
SEGMENTS &aOutSegment,
float aBiuTo3DunitsScale )
{
aOutSegment.resize( aPath.size() );
for( unsigned i = 0; i < aPath.size(); i++ )
{
aOutSegment[i].m_Start = SFVEC2F( (float) aPath[i].X * aBiuTo3DunitsScale,
(float)-aPath[i].Y * aBiuTo3DunitsScale );
}
unsigned int i;
unsigned int j = aOutSegment.size () - 1;
for( i = 0; i < aOutSegment.size (); j = i++ )
{
// Calculate constants for each segment
aOutSegment[i].m_inv_JY_minus_IY = 1.0f / ( aOutSegment[j].m_Start.y -
aOutSegment[i].m_Start.y );
aOutSegment[i].m_JX_minus_IX = (aOutSegment[j].m_Start.x - aOutSegment[i].m_Start.x);
}
}
void buildMansardShape(const utymap::meshing::Polygon& polygon, ClipperLib::Path& offsetShape, std::size_t index)
{
if (!ClipperLib::Orientation(offsetShape))
std::reverse(offsetShape.begin(), offsetShape.end());
// build top
utymap::meshing::Polygon topShape(offsetShape.size(), 0);
std::vector<utymap::meshing::Vector2> topShapeVertices;
topShapeVertices.reserve(offsetShape.size());
for (const auto& p : offsetShape) {
topShapeVertices.push_back(utymap::meshing::Vector2(p.X / Scale, p.Y/ Scale));
}
topShape.addContour(topShapeVertices);
auto topOptions = utymap::meshing::MeshBuilder::Options(0, 0, colorNoiseFreq_, height_, gradient_, minHeight_);
builderContext_.meshBuilder.addPolygon(meshContext_.mesh, topShape, topOptions);
// build sides
auto sideOptions = utymap::meshing::MeshBuilder::Options( 0, 0, colorNoiseFreq_, 0, gradient_, 0);
double topHeight = minHeight_ + height_;
auto size = polygon.points.size();
for (std::size_t i = 0; i < size; i += 2) {
auto topIndex = i;
auto bottomIndex = (index + i) % size;
auto nextTopIndex = (i + 2) % size;
auto nextBottomIndex = (index + i + 2) % size;
auto v0 = utymap::meshing::Vector3(polygon.points[bottomIndex], minHeight_, polygon.points[bottomIndex + 1]);
auto v1 = utymap::meshing::Vector3(polygon.points[nextBottomIndex], minHeight_, polygon.points[nextBottomIndex + 1]);
auto v2 = utymap::meshing::Vector3(topShape.points[nextTopIndex], topHeight, topShape.points[nextTopIndex + 1]);
auto v3 = utymap::meshing::Vector3(topShape.points[topIndex], topHeight, topShape.points[topIndex + 1]);
builderContext_.meshBuilder.addTriangle(meshContext_.mesh, v2, v0, v3, sideOptions, false);
builderContext_.meshBuilder.addTriangle(meshContext_.mesh, v0, v2, v1, sideOptions, false);
}
}
geo::Polygon<geo::Ring<Vector>> Environment::subtract(geo::Polygon<geo::Ring<Vector>> const& poly, geo::Ring<Vector> const& ring) {
ClipperLib::Path subj;
ClipperLib::Paths solution;
ClipperLib::Clipper c;
for (Vector const& v : poly.ering)
subj.push_back(ClipperLib::IntPoint((int)v.x, (int)v.y));
c.AddPath(subj, ClipperLib::ptSubject, true);
for (Ring const& ring : poly.irings) {
subj.clear();
for (Vector const& v : ring)
subj.push_back(ClipperLib::IntPoint((int)v.x, (int)v.y));
std::reverse(subj.begin(), subj.end());
c.AddPath(subj, ClipperLib::ptSubject, true);
}
subj.clear();
for (Vector const& v : ring)
subj.push_back(ClipperLib::IntPoint((int)v.x, (int)v.y));
c.AddPath(subj, ClipperLib::ptClip, true);
c.Execute(ClipperLib::ctDifference, solution);
geo::Polygon<geo::Ring<Vector>> ans;
for (ClipperLib::IntPoint const& pt : solution[0]) {
ans.ering.push_back({pt.X, pt.Y});
}
for (int i = 1; i < solution.size(); ++i) {
ClipperLib::Path const& path = solution[i];
geo::Ring<Vector> ring;
for (ClipperLib::IntPoint const& pt : path)
ring.push_back({pt.X, pt.Y});
ans.irings.push_back(ring);
}
geo::correct(ans);
return ans;
}
inline void setCoordinates(T& t, const ClipperLib::Path& path) {
t.coordinates.reserve(path.size());
for (const auto& c : path) {
t.coordinates.push_back(GeoCoordinate(c.Y / Scale, c.X / Scale));
}
}
void BooleanTool::rebuildTwoIndexSegment(
ClipperLib::Path::size_type start_index,
ClipperLib::Path::size_type end_index,
bool sequence_increasing,
const ClipperLib::Path& polygon,
const PolyMap& polymap,
PathObject* object)
{
Q_UNUSED(sequence_increasing); // only used in Q_ASSERT.
PathCoordInfo start_info = polymap.value(polygon.at(start_index));
PathCoordInfo end_info = polymap.value(polygon.at(end_index));
PathObject* original = end_info.first->path;
bool coords_increasing;
bool is_curve;
int coord_index;
if (start_info.second->index == end_info.second->index)
{
coord_index = end_info.second->index;
bool found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
if (!found)
{
object->getCoordinate(object->getCoordinateCount() - 1).setCurveStart(false);
rebuildCoordinate(end_index, polygon, polymap, object);
return;
}
Q_ASSERT(coords_increasing == sequence_increasing);
}
else
{
coord_index = end_info.second->index;
bool found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
if (!found)
{
coord_index = start_info.second->index;
found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
if (!found)
{
object->getCoordinate(object->getCoordinateCount() - 1).setCurveStart(false);
rebuildCoordinate(end_index, polygon, polymap, object);
return;
}
}
}
if (!is_curve)
object->getCoordinate(object->getCoordinateCount() - 1).setCurveStart(false);
if (coords_increasing)
{
object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 1)));
if (is_curve)
{
object->addCoordinate(original->getCoordinate(coord_index + 2));
object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 3)));
}
}
else
{
if (is_curve)
{
object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 2)));
object->addCoordinate(original->getCoordinate(coord_index + 1));
}
object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 0)));
}
}
void BooleanTool::rebuildSegment(
ClipperLib::Path::size_type start_index,
ClipperLib::Path::size_type end_index,
bool sequence_increasing,
const ClipperLib::Path& polygon,
const PolyMap& polymap,
PathObject* object)
{
auto num_points = polygon.size();
object->getCoordinate(object->getCoordinateCount() - 1).setCurveStart(true);
if ((start_index + 1) % num_points == end_index)
{
// This could happen for a straight line or a very flat curve - take coords directly from original
rebuildTwoIndexSegment(start_index, end_index, sequence_increasing, polygon, polymap, object);
return;
}
// Get polygon point coordinates
const auto& start_point = polygon.at(start_index);
const auto& second_point = polygon.at((start_index + 1) % num_points);
const auto& second_last_point = polygon.at((end_index - 1) % num_points);
const auto& end_point = polygon.at(end_index);
// Try to find the middle coordinates in the same part
bool found = false;
PathCoordInfo second_info{ nullptr, nullptr };
PathCoordInfo second_last_info{ nullptr, nullptr };
for (auto second_it = polymap.find(second_point); second_it != polymap.end(); ++second_it)
{
for (auto second_last_it = polymap.find(second_last_point);
second_last_it != polymap.end() && second_last_it.key() == second_last_point;
++second_last_it)
{
if (second_it->first == second_last_it->first &&
second_it->second->index == second_last_it->second->index)
{
// Same part
found = true;
second_info = *second_it;
second_last_info = *second_last_it;
break;
}
}
if (found)
break;
}
if (!found)
{
// Need unambiguous path part information to find the original object with high probability
qDebug() << "BooleanTool::rebuildSegment: cannot identify original object!";
rebuildSegmentFromPathOnly(start_point, second_point, second_last_point, end_point, object);
return;
}
const PathPart* original_path = second_info.first;
// Try to find the outer coordinates in the same part
PathCoordInfo start_info{ nullptr, nullptr };
for (auto start_it = polymap.find(start_point);
start_it != polymap.end() && start_it.key() == start_point;
++start_it)
{
if (start_it->first == original_path)
{
start_info = *start_it;
break;
}
}
Q_ASSERT(!start_info.first || start_info.first == second_info.first);
PathCoordInfo end_info{ nullptr, nullptr };
for (auto end_it = polymap.find(end_point);
end_it != polymap.end() && end_it.key() == end_point;
++end_it)
{
if (end_it->first == original_path)
{
end_info = *end_it;
break;
}
}
Q_ASSERT(!end_info.first || end_info.first == second_info.first);
const PathObject* original = original_path->path;
auto edge_start = second_info.second->index;
if (edge_start == second_info.first->last_index)
edge_start = second_info.first->first_index;
// Find out start tangent
auto start_param = 0.0;
MapCoord start_coord = MapCoord(0.001 * start_point.X, 0.001 * start_point.Y);
MapCoord start_tangent;
MapCoord end_tangent;
MapCoord end_coord;
double start_error_sq, end_error_sq;
// Maximum difference in mm from reconstructed start and end coords to the
// intersection points returned by Clipper
const double error_bound = 0.4;
if (sequence_increasing)
{
if ( second_info.second->param == 0.0 ||
( start_info.first &&
start_info.second->param == 0.0 &&
( start_info.second->index == edge_start ||
(start_info.second->index == start_info.first->last_index && start_info.first->first_index == edge_start) ) ) )
{
// Take coordinates directly
start_tangent = original->getCoordinate(edge_start + 1);
end_tangent = original->getCoordinate(edge_start + 2);
start_error_sq = start_coord.distanceSquaredTo(original->getCoordinate(edge_start + 0));
if (start_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: start error too high in increasing direct case: " << sqrt(start_error_sq);
}
else
{
// Approximate coords
const PathCoord* prev_coord = second_info.second - 1;
auto dx = second_point.X - start_point.X;
auto dy = second_point.Y - start_point.Y;
auto point_dist = 0.001 * sqrt(dx*dx + dy*dy);
auto delta_start_param = (second_info.second->param - prev_coord->param) * point_dist / qMax(1e-7f, (second_info.second->clen - prev_coord->clen));
start_param = qBound(0.0, second_info.second->param - delta_start_param, 1.0);
MapCoordF unused, o2, o3, o4;
PathCoord::splitBezierCurve(MapCoordF(original->getCoordinate(edge_start + 0)), MapCoordF(original->getCoordinate(edge_start + 1)),
MapCoordF(original->getCoordinate(edge_start + 2)), MapCoordF(original->getCoordinate(edge_start + 3)),
start_param,
unused, unused, o2, o3, o4);
start_tangent = MapCoord(o3);
end_tangent = MapCoord(o4);
start_error_sq = start_coord.distanceSquaredTo(MapCoord(o2));
if (start_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: start error too high in increasing general case: " << sqrt(start_error_sq);
}
// Find better end point approximation and its tangent
if ( second_last_info.second->param == 0.0 ||
(end_info.first &&
end_info.second->param == 0.0 &&
( end_info.second->index == edge_start+3 ||
(end_info.second->index == end_info.first->first_index && end_info.first->last_index == edge_start+3) ) ) )
{
// Take coordinates directly
end_coord = original->getCoordinate(edge_start + 3);
auto test_x = end_point.X - end_coord.nativeX();
auto test_y = end_point.Y - end_coord.nativeY();
end_error_sq = 0.001 * sqrt(test_x*test_x + test_y*test_y);
if (end_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: end error too high in increasing direct case: " << sqrt(end_error_sq);
}
else
{
// Approximate coords
const PathCoord* next_coord = second_last_info.second + 1;
auto next_coord_param = next_coord->param;
if (next_coord_param == 0.0)
next_coord_param = 1.0;
auto dx = end_point.X - second_last_point.X;
auto dy = end_point.Y - second_last_point.Y;
auto point_dist = 0.001 * sqrt(dx*dx + dy*dy);
auto delta_end_param = (next_coord_param - second_last_info.second->param) * point_dist / qMax(1e-7f, (next_coord->clen - second_last_info.second->clen));
auto end_param = (second_last_info.second->param + delta_end_param - start_param) / (1.0 - start_param);
MapCoordF o0, o1, o2, unused;
PathCoord::splitBezierCurve(MapCoordF(start_coord), MapCoordF(start_tangent),
MapCoordF(end_tangent), MapCoordF(original->getCoordinate(edge_start + 3)),
end_param,
o0, o1, o2, unused, unused);
start_tangent = MapCoord(o0);
end_tangent = MapCoord(o1);
end_coord = MapCoord(o2);
auto test_x = end_point.X - end_coord.nativeX();
auto test_y = end_point.Y - end_coord.nativeY();
end_error_sq = 0.001 * sqrt(test_x*test_x + test_y*test_y);
if (end_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: end error too high in increasing general case: " << sqrt(end_error_sq);
}
}
else // if (!sequence_increasing)
{
if ( second_info.second->param == 0.0 ||
( start_info.first &&
start_info.second->param == 0.0 &&
( start_info.second->index == edge_start+3 ||
(start_info.second->index == start_info.first->first_index && start_info.first->last_index == edge_start+3) ) ) )
{
// Take coordinates directly
start_tangent = original->getCoordinate(edge_start + 2);
end_tangent = original->getCoordinate(edge_start + 1);
start_error_sq = start_coord.distanceSquaredTo(original->getCoordinate(edge_start + 3));
if (start_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: start error too high in decreasing direct case: " << sqrt(start_error_sq);
}
else
{
// Approximate coords
const PathCoord* next_coord = second_info.second + 1;
auto next_coord_param = next_coord->param;
if (next_coord_param == 0.0)
next_coord_param = 1.0;
auto dx = second_point.X - start_point.X;
auto dy = second_point.Y - start_point.Y;
auto point_dist = 0.001 * sqrt(dx*dx + dy*dy);
auto delta_start_param = (next_coord_param - second_info.second->param) * point_dist / qMax(1e-7f, (next_coord->clen - second_info.second->clen));
start_param = qBound(0.0, 1.0 - second_info.second->param + delta_start_param, 1.0);
MapCoordF unused, o2, o3, o4;
PathCoord::splitBezierCurve(MapCoordF(original->getCoordinate(edge_start + 3)), MapCoordF(original->getCoordinate(edge_start + 2)),
MapCoordF(original->getCoordinate(edge_start + 1)), MapCoordF(original->getCoordinate(edge_start + 0)),
start_param,
unused, unused, o2, o3, o4);
start_tangent = MapCoord(o3);
end_tangent = MapCoord(o4);
start_error_sq = start_coord.distanceSquaredTo(MapCoord(o2));
if (start_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: start error too high in decreasing general case: " << sqrt(start_error_sq);
}
// Find better end point approximation and its tangent
if ( second_last_info.second->param == 0.0 ||
( end_info.first &&
end_info.second->param == 0.0 &&
( end_info.second->index == edge_start ||
(end_info.second->index == end_info.first->last_index && end_info.first->first_index == edge_start) ) ) )
{
// Take coordinates directly
end_coord = original->getCoordinate(edge_start + 0);
auto test_x = end_point.X - end_coord.nativeX();
auto test_y = end_point.Y - end_coord.nativeY();
end_error_sq = 0.001 * sqrt(test_x*test_x + test_y*test_y);
if (end_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: end error too high in decreasing direct case: " << sqrt(end_error_sq);
}
else
{
// Approximate coords
const PathCoord* prev_coord = second_last_info.second - 1;
auto dx = end_point.X - second_last_point.X;
auto dy = end_point.Y - second_last_point.Y;
auto point_dist = 0.001 * sqrt(dx*dx + dy*dy);
auto delta_end_param = (second_last_info.second->param - prev_coord->param) * point_dist / qMax(1e-7f, (second_last_info.second->clen - prev_coord->clen));
auto end_param = (1.0 - second_last_info.second->param + delta_end_param) / (1 - start_param);
MapCoordF o0, o1, o2, unused;
PathCoord::splitBezierCurve(MapCoordF(start_coord), MapCoordF(start_tangent),
MapCoordF(end_tangent), MapCoordF(original->getCoordinate(edge_start + 0)),
end_param,
o0, o1, o2, unused, unused);
start_tangent = MapCoord(o0);
end_tangent = MapCoord(o1);
end_coord = MapCoord(o2);
auto test_x = end_point.X - end_coord.nativeX();
auto test_y = end_point.Y - end_coord.nativeY();
end_error_sq = 0.001 * sqrt(test_x*test_x + test_y*test_y);
if (end_error_sq > error_bound)
qDebug() << "BooleanTool::rebuildSegment: end error too high in decreasing general case: " << sqrt(end_error_sq);
}
}
if (start_error_sq <= error_bound && end_error_sq <= error_bound)
{
// Rebuild bezier curve using information from original curve
object->addCoordinate(start_tangent);
object->addCoordinate(end_tangent);
object->addCoordinate(resetCoordinate(end_coord));
}
else
{
// Rebuild bezier curve approximately using tangents derived from result polygon
rebuildSegmentFromPathOnly(start_point, second_point, second_last_point, end_point, object);
}
}
void BooleanTool::polygonToPathPart(const ClipperLib::Path& polygon, const PolyMap& polymap, PathObject* object)
{
auto num_points = polygon.size();
if (num_points < 3)
return;
// Index of first used point in polygon
auto part_start_index = 0u;
auto cur_info = PathCoordInfo{ nullptr, nullptr };
// Check if we can find either an unknown intersection point
// or a path coord with parameter 0.
// This gives a starting point to search for curves to rebuild
// (because we cannot start in the middle of a curve)
for (; part_start_index < num_points; ++part_start_index)
{
auto current_point = polygon.at(part_start_index);
if (!polymap.contains(current_point))
break;
if (polymap.value(current_point).second->param == 0.0)
{
cur_info = polymap.value(current_point);
break;
}
}
if (part_start_index == num_points)
{
// Did not find a valid starting point. Return the part as a polygon.
for (auto i = 0u; i < num_points; ++i)
object->addCoordinate(MapCoord(0.001 * polygon.at(i).X, 0.001 * polygon.at(i).Y), (i == 0));
object->parts().back().setClosed(true, true);
return;
}
// Add the first point to the object
rebuildCoordinate(part_start_index, polygon, polymap, object, true);
// Index of first segment point in polygon
auto segment_start_index = part_start_index;
bool have_sequence = false;
bool sequence_increasing = false;
bool stop_before = false;
// Advance along the boundary and rebuild the curve for every sequence
// of path coord pointers with the same path and index.
auto i = part_start_index;
do
{
++i;
if (i >= num_points)
i = 0;
PathCoordInfo new_info{ nullptr, nullptr };
auto new_point = polygon.at(i);
if (polymap.contains(new_point))
new_info = polymap.value(new_point);
if (cur_info.first && cur_info.first == new_info.first)
{
// Same original part
auto cur_coord_index = cur_info.second->index;
MapCoord& cur_coord = cur_info.first->path->getCoordinate(cur_coord_index);
auto new_coord_index = new_info.second->index;
MapCoord& new_coord = new_info.first->path->getCoordinate(new_coord_index);
auto cur_coord_index_adjusted = cur_coord_index;
if (cur_coord_index_adjusted == new_info.first->first_index)
cur_coord_index_adjusted = new_info.first->last_index;
auto new_coord_index_adjusted = new_coord_index;
if (new_coord_index_adjusted == new_info.first->first_index)
new_coord_index_adjusted = new_info.first->last_index;
if (cur_coord_index == new_coord_index)
{
// Somewhere on a curve
bool param_increasing = new_info.second->param > cur_info.second->param;
if (!have_sequence)
{
have_sequence = true;
sequence_increasing = param_increasing;
}
else if (have_sequence && sequence_increasing != param_increasing)
{
stop_before = true;
}
}
else if (new_info.second->param == 0.0 &&
( (cur_coord.isCurveStart() && new_coord_index_adjusted == cur_coord_index + 3) ||
(!cur_coord.isCurveStart() && new_coord_index_adjusted == cur_coord_index + 1) ) )
{
// Original curve is from cur_coord_index to new_coord_index_adjusted.
if (!have_sequence)
{
have_sequence = true;
sequence_increasing = true;
}
else
{
stop_before = !sequence_increasing;
}
}
else if (cur_info.second->param == 0.0 &&
( (new_coord.isCurveStart() && new_coord_index + 3 == cur_coord_index_adjusted) ||
(!new_coord.isCurveStart() && new_coord_index + 1 == cur_coord_index_adjusted) ) )
{
// Original curve is from new_coord_index to cur_coord_index_adjusted.
if (!have_sequence)
{
have_sequence = true;
sequence_increasing = false;
}
else
{
stop_before = sequence_increasing;
}
}
else if ((segment_start_index + 1) % num_points != i)
{
// Not immediately after segment_start_index
stop_before = true;
}
}
if (i == part_start_index ||
stop_before ||
(new_info.second && new_info.second->param == 0.0) ||
(cur_info.first && (cur_info.first != new_info.first || cur_info.second->index != new_info.second->index) && i != (segment_start_index + 1) % num_points) ||
!new_info.first)
{
if (stop_before)
{
if (i == 0)
i = num_points - 1;
else
--i;
}
if (have_sequence)
// A sequence of at least two points belonging to the same curve
rebuildSegment(segment_start_index, i, sequence_increasing, polygon, polymap, object);
else
// A single straight edge
rebuildCoordinate(i, polygon, polymap, object);
if (stop_before)
{
++i;
if (i >= num_points)
i = 0;
rebuildCoordinate(i, polygon, polymap, object);
stop_before = false;
}
segment_start_index = i;
have_sequence = false;
}
cur_info = new_info;
}
while (i != part_start_index);
object->parts().back().connectEnds();
}
