GHZMRSpaceXR/Assets/OpenCVForUnity/Examples/MainModules/imgproc/HoughLinesPExample/HoughLinesPExample.cs

using UnityEngine;
using UnityEngine.SceneManagement;
using System.Collections;
using OpenCVForUnity.CoreModule;
using OpenCVForUnity.ImgprocModule;
using OpenCVForUnity.UnityUtils;

namespace OpenCVForUnityExample
{
    /// <summary>
    /// HoughLinesP Example
    /// An example of straight line detection using the Imgproc.HoughLinesP function.
    /// http://docs.opencv.org/3.1.0/d9/db0/tutorial_hough_lines.html
    /// </summary>
    public class HoughLinesPExample : MonoBehaviour
    {
        // Use this for initialization
        void Start ()
        {
            Texture2D imgTexture = Resources.Load ("chessboard") as Texture2D;
            
            Mat imgMat = new Mat (imgTexture.height, imgTexture.width, CvType.CV_8UC3);
            
            Utils.texture2DToMat (imgTexture, imgMat);
            Debug.Log ("imgMat.ToString() " + imgMat.ToString ());


            Mat grayMat = new Mat ();
            Imgproc.cvtColor (imgMat, grayMat, Imgproc.COLOR_RGB2GRAY);


            Imgproc.Canny (grayMat, grayMat, 50, 200);

            Mat lines = new Mat ();

            Imgproc.HoughLinesP (grayMat, lines, 1, Mathf.PI / 180, 50, 50, 10);

//                      Debug.Log ("lines.toStirng() " + lines.ToString ());
//                      Debug.Log ("lines.dump()" + lines.dump ());

            int[] linesArray = new int[lines.cols () * lines.rows () * lines.channels ()];
            lines.get (0, 0, linesArray);

            for (int i = 0; i < linesArray.Length; i = i + 4) {
                Imgproc.line (imgMat, new Point (linesArray [i + 0], linesArray [i + 1]), new Point (linesArray [i + 2], linesArray [i + 3]), new Scalar (255, 0, 0), 2);
            }

            Texture2D texture = new Texture2D (imgMat.cols (), imgMat.rows (), TextureFormat.RGBA32, false);
            Utils.matToTexture2D (imgMat, texture);
        
            gameObject.GetComponent<Renderer> ().material.mainTexture = texture;
        }
    
        // Update is called once per frame
        void Update ()
        {
        
        }

        /// <summary>
        /// Raises the back button click event.
        /// </summary>
        public void OnBackButtonClick ()
        {
            SceneManager.LoadScene ("OpenCVForUnityExample");
        }
    }
}