3D geometry: SetObjectCoords (Part 10 of 11)

       Name: SetObjectCoords (Part 10 of 11)                         [Show more]
       Type: Subroutine
   Category: 3D geometry
    Summary: Process the next dormant alien (object group 30)
  Deep dive: 3D objects
    Context: See this subroutine in context in the source code
 References: No direct references to this subroutine in this source file


.objc11

 CPY #30                \ If the object ID <> 30, jump to objc12 to return from
 BNE objc12             \ the subroutine

 LDA alienSlot          \ Increment alienSlot to iterate through values 0 to 7
 CLC                    \ and round again
 ADC #1
 AND #7
 STA alienSlot

 DEC objCount           \ Decrement the loop counter to move on to the next
                        \ alien in the group

 BEQ objc12             \ If we have processed all 8 items in the group, jump
                        \ to objc12 to return from the subroutine

 JMP objc4              \ Otherwise loop back to objc4 to process the next item
                        \ in the group