Face alignment - the complete pipeline

Now that we have defined all the components of our pipeline, let us put everything together into one single piece of code that performs the face alignment from end-to-end:

#include <iostream> 
#include <cmath> 
 
#include <opencv2/core/core.hpp> 
#include <opencv2/highgui/highgui.hpp> 
#include <opencv2/imgproc/imgproc.hpp> 
 
using namespace std; 
using namespace cv; 
 
#define PI 3.14159265 
 
float getAngleInRad(Point A, Point B) { 
    float A_x = A.x; 
    float A_y = A.y; 
    float B_x = B.x; 
    float B_y = B.y; 
 
    float slope = ((B_y - A_y) / (B_x - A_x)); 
    return (-1 * atan(slope)); 
} 
 
float getEuclideanDistance(Point A, Point B) { 
    return sqrt( (A.x - B.x) * (A.x - B.x) + (A.y - B.y) * (A.y - B.y) ); 
} 
 
Mat getAffineTransformationMatrix(float rotation_angle, Point...