PhysiGo/app/lib/exercises/exercises_validation/widgets/pose_painter.dart

import 'package:body_detection/models/pose.dart';
import 'package:body_detection/models/pose_landmark.dart';
import 'package:body_detection/models/pose_landmark_type.dart';
import 'package:flutter/widgets.dart';

class PosePainter extends CustomPainter {
  final Pose? pose;
  final Size imageSize;
  PosePainter({required this.pose, required this.imageSize, Key? key});

  final pointPaint = Paint()..color = const Color.fromRGBO(255, 255, 255, 0.8);
  final leftPointPaint = Paint()..color = const Color.fromRGBO(223, 157, 80, 1);
  final rightPointPaint = Paint()..color = const Color.fromRGBO(100, 208, 218, 1);
  final linePaint = Paint()
    ..color = const Color.fromARGB(228, 0, 0, 0)
    ..strokeWidth = 3;

  @override
  void paint(Canvas canvas, Size size) {
    if (pose == null) return;

    final double hRatio = imageSize.width == 0 ? 1 : size.width / imageSize.width;
    final double vRatio = imageSize.height == 0 ? 1 : size.height / imageSize.height;

    offsetForPart(PoseLandmark part) => Offset(part.position.x * hRatio, part.position.y * vRatio);

    // Landmark connections
    final landmarksByType = {for (final it in pose!.landmarks) it.type: it};
    for (final connection in connections) {
      if (landmarksByType[connection[0]] != null &&
          landmarksByType[connection[1]] != null &&
          landmarksByType[connection[0]]!.inFrameLikelihood > 0.5 &&
          landmarksByType[connection[1]]!.inFrameLikelihood > 0.5) {
        final point1 = offsetForPart(landmarksByType[connection[0]]!);
        final point2 = offsetForPart(landmarksByType[connection[1]]!);
        canvas.drawLine(point1, point2, linePaint);
      }
    }
    // for (final part in pose!.landmarks) {
    //   // Landmark points
    //   canvas.drawCircle(offsetForPart(part), 5, pointPaint);
    //   if (part.type.isLeftSide) {
    //     canvas.drawCircle(offsetForPart(part), 3, leftPointPaint);
    //   } else if (part.type.isRightSide) {
    //     canvas.drawCircle(offsetForPart(part), 3, rightPointPaint);
    //   }

    //   // Landmark labels
    //   TextSpan span = TextSpan(
    //     text: part.type.toString().substring(16),
    //     style: const TextStyle(
    //       color: Color.fromRGBO(0, 128, 255, 1),
    //       fontSize: 10,
    //       shadows: [
    //         Shadow(
    //           color: Color.fromRGBO(255, 255, 255, 1),
    //           offset: Offset(1, 1),
    //           blurRadius: 1,
    //         ),
    //       ],
    //     ),
    //   );
    //   TextPainter tp = TextPainter(text: span, textAlign: TextAlign.left);
    //   tp.textDirection = TextDirection.ltr;
    //   tp.layout();
    //   tp.paint(canvas, offsetForPart(part));
    // }
  }

  @override
  bool shouldRepaint(PosePainter oldDelegate) {
    return oldDelegate.pose != pose || oldDelegate.imageSize != imageSize;
  }

  static const List<List<PoseLandmarkType>> connections = [
    // [PoseLandmarkType.leftEar, PoseLandmarkType.leftEyeOuter],
    // [PoseLandmarkType.leftEyeOuter, PoseLandmarkType.leftEye],
    // [PoseLandmarkType.leftEye, PoseLandmarkType.leftEyeInner],
    // [PoseLandmarkType.leftEyeInner, PoseLandmarkType.nose],
    // [PoseLandmarkType.nose, PoseLandmarkType.rightEyeInner],
    // [PoseLandmarkType.rightEyeInner, PoseLandmarkType.rightEye],
    // [PoseLandmarkType.rightEye, PoseLandmarkType.rightEyeOuter],
    // [PoseLandmarkType.rightEyeOuter, PoseLandmarkType.rightEar],
    // [PoseLandmarkType.mouthLeft, PoseLandmarkType.mouthRight],
    [PoseLandmarkType.leftShoulder, PoseLandmarkType.rightShoulder],
    [PoseLandmarkType.leftShoulder, PoseLandmarkType.leftHip],
    [PoseLandmarkType.rightShoulder, PoseLandmarkType.rightHip],
    [PoseLandmarkType.rightShoulder, PoseLandmarkType.rightElbow],
    [PoseLandmarkType.rightWrist, PoseLandmarkType.rightElbow],
    // [PoseLandmarkType.rightWrist, PoseLandmarkType.rightThumb],
    // [PoseLandmarkType.rightWrist, PoseLandmarkType.rightIndexFinger],
    // [PoseLandmarkType.rightWrist, PoseLandmarkType.rightPinkyFinger],
    [PoseLandmarkType.leftHip, PoseLandmarkType.rightHip],
    [PoseLandmarkType.leftHip, PoseLandmarkType.leftKnee],
    [PoseLandmarkType.rightHip, PoseLandmarkType.rightKnee],
    [PoseLandmarkType.rightKnee, PoseLandmarkType.rightAnkle],
    [PoseLandmarkType.leftKnee, PoseLandmarkType.leftAnkle],
    [PoseLandmarkType.leftElbow, PoseLandmarkType.leftShoulder],
    [PoseLandmarkType.leftWrist, PoseLandmarkType.leftElbow],
    // [PoseLandmarkType.leftWrist, PoseLandmarkType.leftThumb],
    // [PoseLandmarkType.leftWrist, PoseLandmarkType.leftIndexFinger],
    // [PoseLandmarkType.leftWrist, PoseLandmarkType.leftPinkyFinger],
    // [PoseLandmarkType.leftAnkle, PoseLandmarkType.leftHeel],
    // [PoseLandmarkType.leftAnkle, PoseLandmarkType.leftToe],
    // [PoseLandmarkType.rightAnkle, PoseLandmarkType.rightHeel],
    // [PoseLandmarkType.rightAnkle, PoseLandmarkType.rightToe],
    // [PoseLandmarkType.rightHeel, PoseLandmarkType.rightToe],
    // [PoseLandmarkType.leftHeel, PoseLandmarkType.leftToe],
    // [PoseLandmarkType.rightIndexFinger, PoseLandmarkType.rightPinkyFinger],
    // [PoseLandmarkType.leftIndexFinger, PoseLandmarkType.leftPinkyFinger],
  ];
}