# Why is angle orientation inconsistent?

While working with 2D transformations and ellipses I painfully found out that the orientation of the angle in ellipse and getRotationMatrix2D is different. **What is the reason for this inconsistency?**

The `ellipse`

angle is positive in clockwise direction:

The `getRotationMatrix2D`

angle orientation is described as *Positive values mean counter-clockwise rotation (the coordinate origin is assumed to be the top-left corner).*

I assume that the coordinate system origin is in all OpenCV functions in the top-left corner, which is standard when working with images.