Routines
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33411: Throw Sword
Used by the routine at HandlerSerf.
Launches a sword for the serf, unless a weapon is already in flight or the player is in a doorway. The sprite ID of the sword depends on the direction that the weapon is travelling in (56 to 63), as worked out by the same method that SwordDirection uses.
Input
IX The player entity
ThrowSword 33411 LD A,(60056) Return if a weapon is already in flight.
33414 AND A
33415 RET NZ
33416 LD A,(24109) Return if the player is in a doorway.
33419 AND A
33420 RET NZ
33421 CALL SoundsSword Call SoundsSword to make the sword sound.
33424 CALL SetWeaponVelocity Call SetWeaponVelocity to set the velocity of the weapon.
33427 LD C,0 C=0 (the direction number for down).
HL points at the Y velocity of the weapon.
33429 LD A,(HL) Fetch the Y velocity of the weapon.
33430 AND A Jump to ThrowSword_Horizontal if the weapon is not moving vertically.
33431 JR Z,ThrowSword_Horizontal
33433 JP P,ThrowSword_CheckX Jump to ThrowSword_CheckX if the weapon is moving down.
33436 LD C,4 C=4 (the direction number for up).
ThrowSword_CheckX 33438 DEC HL Point HL at the X velocity of the weapon.
33439 LD A,(HL) Fetch the X velocity of the weapon.
33440 AND A Jump to ThrowSword_SetSprite if the weapon is not moving horizontally.
33441 JR Z,ThrowSword_SetSprite
33443 JP P,ThrowSword_Right Jump to ThrowSword_Right if the weapon is moving right.
33446 DEC C Decrease the direction number by one, as the weapon is moving left.
ThrowSword_SetSprite 33447 LD A,C Fetch the direction number.
33448 AND %00000111 Keep only bits 0-2 (there are 8 sword sprites).
33450 ADD A,56 Add 56 to point to the correct sprite ID (the sword base sprite ID is: 56).
33452 LD HL,60056 Point HL at the player weapon at PlayerWeapon.
33455 LD (HL),A Write the sprite ID to the weapon.
33456 JP LaunchWeapon Jump to LaunchWeapon to launch the sword.
ThrowSword_Right 33459 INC C Increase the direction number by one, as the weapon is moving right.
33460 JR ThrowSword_SetSprite Jump to ThrowSword_SetSprite to set the sprite of the sword.
The weapon is moving horizontally only.
ThrowSword_Horizontal 33462 DEC HL Point HL at the X velocity of the weapon.
33463 BIT 7,(HL) Jump to ThrowSword_MovingRight if the weapon is moving right.
33465 JR Z,ThrowSword_MovingRight
33467 LD C,6 C=6 (the direction number for left).
33469 JR ThrowSword_SetSprite Jump to ThrowSword_SetSprite to set the sprite of the sword.
ThrowSword_MovingRight 33471 LD C,2 C=2 (the direction number for right).
33473 JR ThrowSword_SetSprite Jump to ThrowSword_SetSprite to set the sprite of the sword.
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