ellipse2Poly.cpp

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#include "mexopencv.hpp"
#include "opencv2/imgproc.hpp"
using namespace std;
using namespace cv;

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    // Check the number of arguments
    nargchk(nrhs>=2 && (nrhs%2)==0 && nlhs<=1);

    // Argument vector
    vector<MxArray> rhs(prhs, prhs+nrhs);

    // Option processing
    int angle = 0;
    int arcStart = 0;
    int arcEnd = 360;
    int delta = 5;
    bool doublePrecision = false;
    for (int i=2; i<nrhs; i+=2) {
        string key(rhs[i].toString());
        if (key == "Angle")
            angle = rhs[i+1].toInt();
        else if (key == "StartAngle")
            arcStart = rhs[i+1].toInt();
        else if (key == "EndAngle")
            arcEnd = rhs[i+1].toInt();
        else if (key == "Delta")
            delta = rhs[i+1].toInt();
        else if (key == "DoublePrecision")
            doublePrecision = rhs[i+1].toBool();
        else
            mexErrMsgIdAndTxt("mexopencv:error",
                "Unrecognized option %s", key.c_str());
    }

    // Process
    if (doublePrecision) {
        Point2d center(rhs[0].toPoint_<double>());
        Size2d axes(rhs[1].toSize_<double>());
        vector<Point2d> pts;
        ellipse2Poly(center, axes, angle, arcStart, arcEnd, delta, pts);
        plhs[0] = MxArray(Mat(pts,false).reshape(1,0));  // Nx2 numeric matrix
    }
    else {
        Point center(rhs[0].toPoint());
        Size axes(rhs[1].toSize());
        vector<Point> pts;
        ellipse2Poly(center, axes, angle, arcStart, arcEnd, delta, pts);
        plhs[0] = MxArray(Mat(pts,false).reshape(1,0));  // Nx2 numeric matrix
    }
}