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BBC Micro Elite

Drawing circles: LAUN (Cassette version)

       Name: LAUN                                              [View in context]
       Type: Subroutine
   Category: Drawing circles
    Summary: Make the launch sound and draw the launch tunnel



 This is shown when launching from or docking with the space station.



.LAUN

 LDA #48                \ Call the NOISE routine with A = 48 to make the sound
 JSR NOISE              \ of the ship launching from the station

 LDA #8                 \ Set the step size for the launch tunnel rings to 8, so
                        \ there are fewer sections in the rings and they are
                        \ quite polygonal (compared to the step size of 4 used
                        \ in the much rounder hyperspace rings)

                        \ Fall through into HFS2 to draw the launch tunnel rings