extendRay

This function takes a ray defined by two points in 3d space and extends the ray by the given amount.

cv::Point3d extendRay(const cv::Point3d & line_start, const cv::Point3d & line_end, float iExtendLength)

1. 
   Parameters:
   • const cv::Point3d & line_start
   • const cv::Point3d & line_end
   • float iExtendLength