I am using the OpticalFlowPyrLk to track some point in an image. I know that the input point list is a set of floating point values. I normal use floating point values with no decimal part as the input (e.g. 125.00). If I use an input value with a decimal part (e.g. 125.639), can I expect to get a correct displacement based on that decimal part, or is the value truncated to an integer part before the calculations are done?