Track geometry: GetSegmentYawAngle

       Name: GetSegmentYawAngle                                      [Show more]
       Type: Subroutine
   Category: Track geometry
    Summary: Calculate the difference in yaw angle between a track segment and
             the player
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * GetSegmentAngles (Part 1 of 3) calls GetSegmentYawAngle
             * GetSegmentAngles (Part 2 of 3) calls GetSegmentYawAngle


 Arguments:

   X                    The offset from xSegmentCoordILo of the segment's 3D
                        coordinates, i.e. the segment number * 3, with:

                          * X for inner track segment coordinates

                          * X + 120 for outer track segment coordinates

   segmentListPointer   The index of the segment in the track segment list to
                        use for calculations


 Returns:

   (L K)                The distance between the object and the player's car

   A                    Contains the high byte of (L K)


.GetSegmentYawAngle

 JSR GetObjYawAngle-2   \ Calculate the segment's yaw angle, from the point of
                        \ view of the player, returning it in (JJ II)

 LDY segmentListPointer \ Set Y = segmentListPointer, so the result gets stored
                        \ in the correct position in the track segment list

                        \ Fall through into GetSectionYawAngle to set the
                        \ specified xVergeRight or xVergeLeft to the difference
                        \ in the yaw angle between the player and the segment