C++ Paths::push_back方法代码示例

void BooleanTool::pathObjectToPolygons(
        const PathObject* object,
        ClipperLib::Paths& polygons,
        PolyMap& polymap)
{
	object->update();
	
	polygons.reserve(polygons.size() + object->parts().size());
	
	for (const auto& part : object->parts())
	{
		const PathCoordVector& path_coords = part.path_coords;
		auto path_coords_end = path_coords.size();
		if (part.isClosed())
			--path_coords_end;
		
		ClipperLib::Path polygon;
		for (auto i = 0u; i < path_coords_end; ++i)
		{
			auto point = MapCoord { path_coords[i].pos };
			polygon.push_back(ClipperLib::IntPoint(point.nativeX(), point.nativeY()));
			polymap.insertMulti(polygon.back(), std::make_pair(&part, &path_coords[i]));
		}
		
		bool orientation = Orientation(polygon);
		if ( (&part == &object->parts().front()) != orientation )
		{
			std::reverse(polygon.begin(), polygon.end());
		}
		
		// Push_back shall move the polygon.
		static_assert(std::is_nothrow_move_constructible<ClipperLib::Path>::value, "ClipperLib::Path must be nothrow move constructible");
		polygons.push_back(polygon);
	}
}

ClipperLib::Paths Clipper::toClipper(const std::vector<ofPolyline>& polylines,
                                     ClipperLib::cInt scale)
{
    ClipperLib::Paths paths;
    for (auto& polyline: polylines) paths.push_back(toClipper(polyline, scale));
    return paths;
}

ClipperLib::Paths
Slic3rMultiPoints_to_ClipperPaths(const T &input)
{
    ClipperLib::Paths retval;
    for (typename T::const_iterator it = input.begin(); it != input.end(); ++it)
        retval.push_back(Slic3rMultiPoint_to_ClipperPath(*it));
    return retval;
}

ClipperLib::Paths ClipperHelpers::convert(
    const QVector<Path>&  paths,
    const PositiveLength& maxArcTolerance) noexcept {
  ClipperLib::Paths p;
  p.reserve(paths.size());
  foreach (const Path& path, paths) {
    p.push_back(convert(path, maxArcTolerance));
  }

void
Slic3rMultiPoints_to_ClipperPaths(const T &input, ClipperLib::Paths &output)
{
    output.clear();
    for (typename T::const_iterator it = input.begin(); it != input.end(); ++it) {
        ClipperLib::Path p;
        Slic3rMultiPoint_to_ClipperPath(*it, p);
        output.push_back(p);
    }
}

	ClipperLib::Paths polyToClipperPaths(const panda::types::Polygon& poly)
	{
		ClipperLib::Paths paths;
		auto contour = pathToClipperPath(poly.contour);
		if (!Orientation(contour)) // We want the orientation to be CW
			ReversePath(contour);
		paths.push_back(contour);

		for (const auto& hole : poly.holes)
		{
			auto path = pathToClipperPath(hole);
			if (path.size() < 3)
				continue;

			// The orientation of holes must be opposite that of outer polygons.
			if (Orientation(path))
				ReversePath(path);
			paths.push_back(path);
		}

		return paths;
	}

void Grasp_Calculator::double_polygon_to_path(DPolygon2D double_polygon, ClipperLib::Paths &int_polygon)
{
    ClipperLib::cInt factor = 100000;
    ClipperLib::Path int_poly;
    int_polygon.clear();
    for (std::vector<DoublePoint2D>::iterator p2d = double_polygon.begin(); p2d != double_polygon.end(); ++p2d)
    {
        ClipperLib::IntPoint p;
        p.X = (ClipperLib::cInt)(factor * p2d->x);
        p.Y = (ClipperLib::cInt)(factor * p2d->y);
        int_poly.push_back(p);
    }
    int_polygon.push_back(int_poly);
}

// 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;
    }
}