/// <summary>
/// Raises the web cam texture to mat helper initialized event.
/// </summary>
public void OnWebCamTextureToMatHelperInitialized()
{
Mat webCamTextureMat = webCamTextureToMatHelper.GetMat();
texture = new Texture2D(webCamTextureMat.cols(), webCamTextureMat.rows(), TextureFormat.RGBA32, false);
gameObject.GetComponent <Renderer>().material.mainTexture = texture;
gameObject.transform.localScale = new Vector3(webCamTextureMat.cols(), webCamTextureMat.rows(), 1);
float width = webCamTextureMat.width();
float height = webCamTextureMat.height();
float imageSizeScale = 1.0f;
float widthScale = (float)Screen.width / width;
float heightScale = (float)Screen.height / height;
if (widthScale < heightScale)
{
Camera.main.orthographicSize = (width * (float)Screen.height / (float)Screen.width) / 2;
imageSizeScale = (float)Screen.height / (float)Screen.width;
}
else
{
Camera.main.orthographicSize = height / 2;
}
//set cameraparam
int max_d = (int)Mathf.Max(width, height);
double fx = max_d;
double fy = max_d;
double cx = width / 2.0f;
double cy = height / 2.0f;
camMatrix = new Mat(3, 3, CvType.CV_64FC1);
camMatrix.put(0, 0, fx);
camMatrix.put(0, 1, 0);
camMatrix.put(0, 2, cx);
camMatrix.put(1, 0, 0);
camMatrix.put(1, 1, fy);
camMatrix.put(1, 2, cy);
camMatrix.put(2, 0, 0);
camMatrix.put(2, 1, 0);
camMatrix.put(2, 2, 1.0f);
distCoeffs = new MatOfDouble(0, 0, 0, 0);
distCoeffsMarkerLess = new MatOfDouble(0, 0, 0, 0);
//calibration camera
Size imageSize = new Size(width * imageSizeScale, height * imageSizeScale);
double apertureWidth = 0;
double apertureHeight = 0;
double[] fovx = new double[1];
double[] fovy = new double[1];
double[] focalLength = new double[1];
Point principalPoint = new Point(0, 0);
double[] aspectratio = new double[1];
Calib3d.calibrationMatrixValues(camMatrix, imageSize, apertureWidth, apertureHeight, fovx, fovy, focalLength, principalPoint, aspectratio);
//To convert the difference of the FOV value of the OpenCV and Unity.
double fovXScale = (2.0 * Mathf.Atan((float)(imageSize.width / (2.0 * fx)))) / (Mathf.Atan2((float)cx, (float)fx) + Mathf.Atan2((float)(imageSize.width - cx), (float)fx));
double fovYScale = (2.0 * Mathf.Atan((float)(imageSize.height / (2.0 * fy)))) / (Mathf.Atan2((float)cy, (float)fy) + Mathf.Atan2((float)(imageSize.height - cy), (float)fy));
//Adjust Unity Camera FOV https://github.com/opencv/opencv/commit/8ed1945ccd52501f5ab22bdec6aa1f91f1e2cfd4
if (widthScale < heightScale)
{
ARCamera.fieldOfView = (float)(fovx [0] * fovXScale);
}
else
{
ARCamera.fieldOfView = (float)(fovy [0] * fovYScale);
}
rvecs = new Mat();
tvecs = new Mat();
rgbMat = new Mat(webCamTextureMat.rows(), webCamTextureMat.cols(), CvType.CV_8UC3);
transformationM = new Matrix4x4();
invertYM = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1, -1, 1));
invertZM = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1, 1, -1));
//if WebCamera is frontFaceing,flip Mat.
webCamTextureToMatHelper.flipHorizontal = webCamTextureToMatHelper.GetWebCamDevice().isFrontFacing;
}
