|
Routines |
| Prev: 659B | Up: Map | Next: 660D |
|
Used by the routine at Run_Game_Frame.
|
||||
| DrawNestChicks | 65EA | LD HL,$E08A | HL=E08A (sprite buffer position for the first chick). | |
| 65ED | LD B,$03 | Set a chick counter in B for 03 chicks. | ||
| DrawNestChicks_Loop | 65EF | PUSH BC | Stash the chick counter on the stack. | |
| 65F0 | PUSH HL | Stash the screen position on the stack. | ||
| 65F1 | LD HL,$A763 | HL=Graphics_ChickFrame_01 (base address of the chick animation frames). | ||
| 65F4 | LD BC,$0008 | BC=08 (bytes per frame). | ||
|
Use the rotating bit pattern at ChickAnimationStates to select which animation frame to use for this chick. The pattern is rotated each time, so each chick picks up a different bit and animates independently.
|
||||
| 65F7 | LD A,($5FB4) | Update *ChickAnimationStates by rotating the frame selection bits. | ||
| 65FA | RRCA | |||
| 65FB | LD ($5FB4),A | |||
| 65FE | JR C,DrawNestChicks_DrawFrame | Jump to DrawNestChicks_DrawFrame if carry is set (use first frame at Graphics_ChickFrame_01). | ||
| 6600 | ADD HL,BC | HL+=BC (use second frame at Graphics_ChickFrame_02). | ||
| DrawNestChicks_DrawFrame | 6601 | EX DE,HL | Transfer the frame graphic address to DE. | |
| 6602 | POP HL | Restore the screen position from the stack. | ||
| 6603 | PUSH HL | Keep a copy of the screen position on the stack. | ||
| 6604 | CALL Handler_DrawWorm_Frame | Call Handler_DrawWorm_Frame to draw the chick frame to the screen. | ||
| 6607 | POP HL | Restore the screen position and chick counter from the stack. | ||
| 6608 | POP BC | |||
| 6609 | INC L | Move one character column to the right for the next chick. | ||
| 660A | DJNZ DrawNestChicks_Loop | Decrease the chick counter by one and loop back to DrawNestChicks_Loop until all 03 chicks are drawn. | ||
| 660C | RET | Return. | ||
| Prev: 659B | Up: Map | Next: 660D |