Track geometry: CopySectionData

       Name: CopySectionData                                         [Show more]
       Type: Subroutine
   Category: Track geometry
    Summary: Copy a 16-bit y-coordinate from the track section data
  Deep dive: Building a 3D track from sections and segments
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * GetTrackSegment (Part 3 of 3) calls CopySectionData


 Arguments:

   X                    Copy X-th (ySegmentCoordIHi ySegmentCoordILo) to
                        (ySegmentCoordOHi ySegmentCoordOLo)


.CopySectionData

 LDA ySegmentCoordILo,X \ Copy the following 16-bit coordinate:
 STA ySegmentCoordOLo,X \
                        \   * The X-th ySegmentCoordI to the X-th ySegmentCoordO
                        \
                        \ starting with the low byte

 LDA ySegmentCoordIHi,X \ And then the high byte
 STA ySegmentCoordOHi,X

 RTS                    \ Return from the subroutine