Ellipse.cpp

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#include "Utilities/MSLang/Ellipse.h"
#include "Physics/Physics.h"
#include "Physics/Units.h"
#include "Utilities/MSLang/ArgumentExtractor.h"
#include "Utilities/MSLang/matheval.h"
 
#include <regex>
 
namespace mslang {
    void Ellipse::print(int indentwidth) {
        std::string indent(indentwidth, ' ');
        std::string indent2(indentwidth + 8, ' ');
        Vector_t<double, 3> origin = trafo_m.getOrigin();
        double angle               = trafo_m.getAngle() * Units::rad2deg;
        std::cout << indent << "ellipse, \n"
                  << indent2 << "w: " << width_m << ", \n"
                  << indent2 << "h: " << height_m << ", \n"
                  << indent2 << "origin: " << origin[0] << ", " << origin[1] << ",\n"
                  << indent2 << "angle: " << angle << "\n"
                  << indent2 << std::setw(14) << trafo_m(0, 0) << std::setw(14) << trafo_m(0, 1)
                  << std::setw(14) << trafo_m(0, 2) << "\n"
                  << indent2 << std::setw(14) << trafo_m(1, 0) << std::setw(14) << trafo_m(1, 1)
                  << std::setw(14) << trafo_m(1, 2) << "\n"
                  << indent2 << std::setw(14) << trafo_m(2, 0) << std::setw(14) << trafo_m(2, 1)
                  << std::setw(14) << trafo_m(2, 2) << std::endl;
    }
 
    void Ellipse::writeGnuplot(std::ofstream& out) const {
        const unsigned int N        = 101;
        const double dp             = Physics::two_pi / (N - 1);
        const unsigned int colwidth = out.precision() + 8;
 
        double phi = 0;
        for (unsigned int i = 0; i < N; ++i, phi += dp) {
            Vector_t<double, 3> pt(0.0);
            pt[0] = std::copysign(
                    sqrt(std::pow(height_m * width_m * 0.25, 2)
                         / (std::pow(height_m * 0.5, 2) + std::pow(width_m * 0.5 * tan(phi), 2))),
                    cos(phi));
            pt[1] = pt[0] * tan(phi);
            pt    = trafo_m.transformFrom(pt);
 
            out << std::setw(colwidth) << pt[0] << std::setw(colwidth) << pt[1] << std::endl;
        }
        out << std::endl;
 
        for (auto item : divisor_m) {
            item->writeGnuplot(out);
        }
 
        // bb_m.writeGnuplot(out);
    }
 
    void Ellipse::apply(std::vector<std::shared_ptr<Base> >& bfuncs) {
        bfuncs.emplace_back(this->clone());
    }
 
    std::shared_ptr<Base> Ellipse::clone() const {
        std::shared_ptr<Ellipse> elps(new Ellipse);
        elps->width_m  = width_m;
        elps->height_m = height_m;
        elps->trafo_m  = trafo_m;
        elps->bb_m     = bb_m;
 
        for (auto item : divisor_m) {
            elps->divisor_m.emplace_back(item->clone());
        }
 
        return std::static_pointer_cast<Base>(elps);
    }
 
    void Ellipse::computeBoundingBox() {
        Vector_t<double, 3> llc(0.0), urc(0.0);
        const Vector_t<double, 3> e_x(1.0, 0.0, 0.0), e_y(0.0, 1.0, 0.0);
        const Vector_t<double, 3> center = trafo_m.transformFrom(Vector_t<double, 3>(0.0));
        const Vector_t<double, 3> e_xp   = trafo_m.transformFrom(e_x) - center;
        const Vector_t<double, 3> e_yp   = trafo_m.transformFrom(e_y) - center;
        const double& M11                = e_xp[0];
        const double& M12                = e_yp[0];
        const double& M21                = e_xp[1];
        const double& M22                = e_yp[1];
 
        double t         = atan2(height_m * M12, width_m * M11);
        double halfwidth = 0.5 * (M11 * width_m * cos(t) + M12 * height_m * sin(t));
        llc[0]           = center[0] - std::abs(halfwidth);
        urc[0]           = center[0] + std::abs(halfwidth);
 
        t = atan2(height_m * M22, width_m * M21);
 
        double halfheight = 0.5 * (M21 * width_m * cos(t) + M22 * height_m * sin(t));
 
        llc[1] = center[1] - std::abs(halfheight);
        urc[1] = center[1] + std::abs(halfheight);
 
        bb_m = BoundingBox2D(llc, urc);
 
        for (auto item : divisor_m) {
            item->computeBoundingBox();
        }
    }
 
    bool Ellipse::isInside(const Vector_t<double, 3>& R) const {
        if (!bb_m.isInside(R)) return false;
 
        Vector_t<double, 3> X = trafo_m.transformTo(R);
        if (4 * (std::pow(X[0] / width_m, 2) + std::pow(X[1] / height_m, 2)) <= 1) {
            for (auto item : divisor_m) {
                if (item->isInside(R)) return false;
            }
 
            return true;
        }
 
        return false;
    }
 
    bool Ellipse::parse_detail(iterator& it, const iterator& end, Function* fun) {
        ArgumentExtractor arguments(std::string(it, end));
        double width, height;
        try {
            width  = parseMathExpression(arguments.get(0));
            height = parseMathExpression(arguments.get(1));
        } catch (std::runtime_error& e) {
            std::cout << e.what() << std::endl;
            return false;
        }
 
        Ellipse* elps  = static_cast<Ellipse*>(fun);
        elps->width_m  = width;
        elps->height_m = height;
 
        if (elps->width_m < 0.0) {
            std::cout << "Ellipse: a negative width provided '" << arguments.get(0) << " = "
                      << elps->width_m << "'" << std::endl;
            return false;
        }
        if (elps->height_m < 0.0) {
            std::cout << "Ellipse: a negative height provided '" << arguments.get(1) << " = "
                      << elps->height_m << "'" << std::endl;
            return false;
        }
 
        it += (arguments.getLengthConsumed() + 1);
 
        return true;
    }
}  // namespace mslang