void function ( ) { }
updates the distortion offset by current distortion data note : distortion offset = 0.5 real screen width in meters - 0.5 lens separation in meters / real screen width in meters concode_field_sep float mRealScreenWidthMeters concode_elem_sep int mHorizontalRealScreenPixels concode_elem_sep int mVerticalRealScreenPixels concode_elem_sep int mMSAA concode_elem_sep float mRealScreenHeightMeters concode_elem_sep int mFBOWidth concode_elem_sep int mFBOHeight concode_field_sep float getRealScreenWidthMeters concode_elem_sep int getVerticalRealScreenPixels concode_elem_sep float getRealScreenHeightMeters concode_elem_sep int getFBOHeight concode_elem_sep int getFBOWidth concode_elem_sep int getMSAA concode_elem_sep int getHorizontalRealScreenPixels