mapPointSpherical  468 modules/imgproc/src/undistort.cpp         Point2f p1 = mapPointSpherical(Point2f((float)q[0], (float)q[1]), alpha, &J, projType);
mapPointSpherical  529 modules/imgproc/src/undistort.cpp             Point2f q = mapPointSpherical(vvec[0], alpha, 0, projType);