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Routines |
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Used by the routine at PLAYER_LEGS.
The legs' graphics 16-23 are two views (bit 2) of four frames (bits 0-1): a stride, legs together, the other stride, together again -- frames 1 and 3 share a drawing (GRAPHICS). While the robot walks, jumps or walks into a room the legs step on through the four, with a sound (FOOTSTEP) on leaving a stride, frames 0 and 2. Otherwise they carry on, silently, to frame 1 and stop there. Nothing happens on the turn a turn starts: HANDLE_LEFT_RIGHT, called just before, has given the legs an in-between view, 24-27.
Pentagram's is the same with frame 2 the standing pose and a footstep every fourth frame; Knight Lore's walk has six frames.
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| HANDLE_FORWARD | C25E | LD A,(IX+$00) | Graphics 24-27: a turn has just started | |||||||
| C261 | SUB $18 | |||||||||
| C263 | CP $04 | |||||||||
| C265 | RET C | |||||||||
| C266 | LD A,(IX+$0C) | Walking into a room: step | ||||||||
| C269 | AND $F0 | |||||||||
| C26B | JR NZ,HANDLE_FORWARD_0 | |||||||||
| C26D | BIT 3,(IX+$0C) | Jumping: step | ||||||||
| C271 | JR NZ,HANDLE_FORWARD_0 | |||||||||
| C273 | BIT 2,C | Walk not held: on to the standing frame | ||||||||
| C275 | JR Z,HANDLE_FORWARD_2 | |||||||||
| HANDLE_FORWARD_0 | C277 | PUSH BC | The step's sound, on frames 0 and 2 only; the controls kept | |||||||
| C278 | CALL FOOTSTEP | |||||||||
| C27B | POP BC | |||||||||
| HANDLE_FORWARD_1 | C27C | LD A,(IX+$00) | The next frame of four, in the graphic's low two bits | |||||||
| C27F | LD E,A | |||||||||
| C280 | INC A | |||||||||
| C281 | AND $03 | |||||||||
| C283 | LD D,A | |||||||||
| C284 | LD A,E | |||||||||
| C285 | AND $FC | |||||||||
| C287 | OR D | |||||||||
| C288 | LD (IX+$00),A | |||||||||
| C28B | RET | |||||||||
| HANDLE_FORWARD_2 | C28C | LD A,(IX+$00) | Frame 1, legs together: stand | |||||||
| C28F | AND $03 | |||||||||
| C291 | CP $01 | |||||||||
| C293 | RET Z | |||||||||
| C294 | JR HANDLE_FORWARD_1 | Otherwise step on towards it, silently | ||||||||
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