Routines
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6974: Fire Repellent Spray
Used by the routine at FireWeapon.
Starts a repellent spray in the weapon slot held in FreeWeaponSlot, in front of Robbie. It is not fired if Robbie is too close to the edge of the play area.
Input
DE State_Robbie_Colour (the colour of Robbie)
HL The weapon object
FireRepellentSpray 6974 CALL GetRobbieDirection Get the X position and the direction using GetRobbieDirection.
6977 JR Z,FireRepellentSpray_Right Jump to FireRepellentSpray_Right if the spray goes to the right.
6979 CP $30 Return if Robbie is too close to the left edge.
697B RET C
697C SUB $0C Subtract 0C from the X position (so it starts to the left of Robbie).
697E LD (HL),$48 Write 48 (a repellent spray moving left) to the state of the weapon.
FireRepellentSpray_Colour 6980 LD B,$45 B=45 (the colour of the spray).
6982 JP CreateWeapon Jump to CreateWeapon to create the weapon.
FireRepellentSpray_Right 6985 CP $C0 Return if Robbie is too close to the right edge.
6987 RET NC
6988 ADD A,$18 Add 18 to the X position (so it starts to the right of Robbie).
698A LD (HL),$08 Write 08 (a repellent spray moving right) to the state of the weapon.
698C JP FireRepellentSpray_Colour Jump to FireRepellentSpray_Colour.
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