Gameplay: ApplyTactics (Part 8 of 8)

       Name: ApplyTactics (Part 8 of 8)                              [Show more]
       Type: Subroutine
   Category: Gameplay
    Summary: Redraw the object on the screen, optionally with a dithered
             effect
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ApplyEnemyTactics calls via tact25
             * ApplyTactics (Part 2 of 8) calls via tact25
             * ApplyTactics (Part 3 of 8) calls via tact25
             * ApplyTactics (Part 5 of 8) calls via tact25
             * ApplyTactics (Part 7 of 8) calls via tact25


 Other entry points:

   tact25               Dither the updated object #X onto the screen, with bit 7
                        of drawLandscape determining whether the object is drawn
                        on its own (bit 7 set) or with the surrounding landscape
                        (bit 7 clear)


.tact25

                        \ We jump here to update object #X on-screen by drawing
                        \ the object (or the landscape without the object) onto
                        \ the screen with a dithered effect
                        \
                        \ This is used to show objects being absorbed, for
                        \ example

 LDA #%01000000         \ Clear bit 7 and set bit 6 of ditherObjectSights so the
 STA ditherObjectSights \ updated object is dithered onto the screen in the call
                        \ to DrawUpdatedObject below

.tact26

                        \ If we jump here instead of tact25, then we update
                        \ object #X on-screen, but instantly rather than with a
                        \ dithered effect
                        \
                        \ This is used to show objects rotating, for example

 STX currentObject      \ Set the current object to X so the call

 LDA playerObject       \ Set viewingObject to the object number of the player
 STA viewingObject

 JSR DrawUpdatedObject  \ Draw the updated object (or the landscape where the
                        \ object used to be) into the screen buffer and dither
                        \ it onto the screen, pixel by pixel and randomly

.tact27

 JMP MoveOnToNextEnemy  \ Jump to MoveOnToNextEnemy to stop applying tactics to
                        \ this enemy and set things up so we move on to the next
                        \ enemy in the next iteration of the gameplay loop