//using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;
//using OpenCvSharp;
//// 绘制类，画人脸框，画关键点等
//namespace FaceAI
//{
//    class FaceDraw
//    {
//        // 画人脸框
//        public static int draw_rects(ref Mat img, int face_num, BDFaceBBox[] info)
//        {
//            if (face_num <= 0)
//            {
//                return 0;
//            }
//            Scalar color = new Scalar(0, 255, 0);
//            for (int i = 0; i < face_num; i++)
//            {
//                int x = Convert.ToInt32(info[i].center_x - info[i].width / 2.0);
//                int y = Convert.ToInt32(info[i].center_y - info[i].height / 2.0);
//                int w = Convert.ToInt32(info[i].width);
//                int h = Convert.ToInt32(info[i].height);
//                Rect rect = new Rect(x, y, w, h);
//                Cv2.Rectangle(img, rect, color);
//            }
//            return 0;
//        }
//        // 画人脸框
//        public static int draw_rects(ref Mat img, int face_num, BDFaceTrackInfo[] track_info)
//        {          
//            if (face_num <= 0)
//            {
//                return 0;
//            }
//            Scalar color = new Scalar(0, 255, 0);
//            for(int i = 0; i < face_num; i++)
//            {
//                int x = Convert.ToInt32(track_info[i].box.center_x- track_info[i].box.width / 2.0);
//                int y = Convert.ToInt32(track_info[i].box.center_y - track_info[i].box.height / 2.0);
//                int w = Convert.ToInt32(track_info[i].box.width);
//                int h = Convert.ToInt32(track_info[i].box.height);
//                Rect rect = new Rect(x,y,w,h);
//                Cv2.Rectangle(img, rect, color);
//            }
//            return 0;
//        }
//        // 画人脸关键点
//        public static int draw_shape(ref Mat img, int face_num, BDFaceTrackInfo[] track_info)
//        {
//            if (face_num <= 0)
//            {
//                return 0;
//            }
//            int face_id = 0;
//            Scalar color = new Scalar(0, 255, 255);
//            Scalar color2 = new Scalar(0, 0, 255);
//            for (int i = 0; i < face_num; ++i)
//            {
//                int point_size = track_info[i].landmark.size / 2;
//                int radius = 2;
//                face_id = track_info[i].face_id;
//                for (int j = 0; j < point_size; ++j)
//                {
//                    Cv2.Circle(img, (int)track_info[i].landmark.data[j * 2], (int)track_info[i].landmark.data[j * 2 + 1], radius, color);
//                }
//                if (point_size == 72)
//                {
//                    const int components = 9;
//                    int[] comp1 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
//                    int[] comp2 = { 13, 14, 15, 16, 17, 18, 19, 20, 13, 21 };
//                    int[] comp3 = { 22, 23, 24, 25, 26, 27, 28, 29, 22 };
//                    int[] comp4 = { 30, 31, 32, 33, 34, 35, 36, 37, 30, 38 };
//                    int[] comp5 = { 39, 40, 41, 42, 43, 44, 45, 46, 39 };
//                    int[] comp6 = { 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 47 };
//                    int[] comp7 = { 51, 57, 52 };
//                    int[] comp8 = { 58, 59, 60, 61, 62, 63, 64, 65, 58 };
//                    int[] comp9 = { 58, 66, 67, 68, 62, 69, 70, 71, 58 };
//                    int[][] idx = { comp1, comp2, comp3, comp4, comp5, comp6, comp7, comp8, comp9 };
//                    int[] npoints = { 13, 10, 9, 10, 9, 11, 3, 9, 9 };

//                    for (int m = 0; m < components; ++m)
//                    {
//                        for (int n = 0; n < npoints[m] - 1; ++n)
//                        {
//                            Point p1 = new Point(track_info[i].landmark.data[idx[m][n] * 2], track_info[i].landmark.data[idx[m][n] * 2 + 1]);
//                            Point p2 = new Point(track_info[i].landmark.data[idx[m][n + 1] * 2], track_info[i].landmark.data[idx[m][n + 1] * 2 + 1]);
//                            Cv2.Line(img, p1, p2, color2);
//                        }
//                    }
//                }
//                string s_face_id = face_id.ToString();
//                double font_scale = 2;
//                Point pos = new Point(track_info[i].box.center_x, track_info[i].box.center_y);
//                Cv2.PutText(img, s_face_id, pos, HersheyFonts.HersheyComplex, font_scale, new Scalar(0, 255, 255));              
//            }
           
//            return 0;
//        }

//        // 画人脸关键点
//        public static int draw_landmark(ref Mat img, int face_num, BDFaceLandmark[] landmark)
//        {
//            if (face_num <= 0)
//            {
//                return 0;
//            }
//            Scalar color = new Scalar(0, 255, 255);
//            Scalar color2 = new Scalar(0, 0, 255);
//            for (int i = 0; i < face_num; ++i)
//            {
//                int point_size = landmark[i].size / 2;
//                int radius = 2;
//                for (int j = 0; j < point_size; ++j)
//                {
//                    Cv2.Circle(img, (int)landmark[i].data[j * 2], (int)landmark[i].data[j * 2 + 1], radius, color);
//                }
//                if (point_size == 72)
//                {
//                    const int components = 9;
//                    int[] comp1 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
//                    int[] comp2 = { 13, 14, 15, 16, 17, 18, 19, 20, 13, 21 };
//                    int[] comp3 = { 22, 23, 24, 25, 26, 27, 28, 29, 22 };
//                    int[] comp4 = { 30, 31, 32, 33, 34, 35, 36, 37, 30, 38 };
//                    int[] comp5 = { 39, 40, 41, 42, 43, 44, 45, 46, 39 };
//                    int[] comp6 = { 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 47 };
//                    int[] comp7 = { 51, 57, 52 };
//                    int[] comp8 = { 58, 59, 60, 61, 62, 63, 64, 65, 58 };
//                    int[] comp9 = { 58, 66, 67, 68, 62, 69, 70, 71, 58 };
//                    int[][] idx = { comp1, comp2, comp3, comp4, comp5, comp6, comp7, comp8, comp9 };
//                    int[] npoints = { 13, 10, 9, 10, 9, 11, 3, 9, 9 };

//                    for (int m = 0; m < components; ++m)
//                    {
//                        for (int n = 0; n < npoints[m] - 1; ++n)
//                        {
//                            Point p1 = new Point(landmark[i].data[idx[m][n] * 2], landmark[i].data[idx[m][n] * 2 + 1]);
//                            Point p2 = new Point(landmark[i].data[idx[m][n + 1] * 2], landmark[i].data[idx[m][n + 1] * 2 + 1]);
//                            Cv2.Line(img, p1, p2, color2);
//                        }
//                    }
//                }


//            }
//            return 0;
//        }
//    }
//}