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Routines |
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Control the speed of animation by pausing when things aren't happening. So if there's no spaceship being animated we pause slightly to keep speed consistent with when there is a spaceship on screen. Same for when we need to animate the player's ship moving, and the player's bullet.
Used by the routine at start.
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| dynamic_pause | 24868 | LD A,(_SPACESHIP_DIRECTION) | Is there a spaceship on screen? If there isn't we pause a moment to control speed. If there is we skip that pause | |
| 24871 | OR A | |||
| 24872 | JR NZ,dynamic_pause_0 | |||
| 24874 | LD A,(_SPACESHIP_SPEED_FACTOR) | Load A with speed factor | ||
| 24877 | CALL delay_ms | Busy wait a multiple of 'A' states | ||
| dynamic_pause_0 | 24880 | LD A,(_YPOS_ADJUST) | Do we need to move and redraw the player ship this iteration? If not, we pause. | |
| 24883 | OR A | |||
| 24884 | JR NZ,dynamic_pause_1 | |||
| 24886 | LD A,(_PLAYER_SPEED_FACTOR) | Load A with speed factor | ||
| 24889 | CALL delay_ms | Busy wait a multiple of 'A' states | ||
| dynamic_pause_1 | 24892 | LD A,(_PLAYER_BULLET_IN_FLIGHT) | Is there a bullet is in flight? If not we need to pause here too. | |
| 24895 | OR A | |||
| 24896 | JP NZ,game_loop | |||
| 24899 | LD A,(_BULLET_SPEED_FACTOR) | Load A with speed factor | ||
| 24902 | CALL delay_ms | Busy wait a multiple of 'A' states | ||
| 24905 | JP game_loop | Back to game loop | ||
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