Routines
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25750: Guide a character to a location on the same floor
Used by the routine at 25534 when the character under consideration is on the same floor as his destination.
Input
DE Character's coordinates
H Character number (152-169)
L 101
25750 INC L Point HL at the destination x-coordinate
25751 LD A,E A=character's current x-coordinate
25752 CP (HL) Is the character at the destination?
25753 JR NZ,25765 Jump if not
25755 LD L,96 Byte 96 holds the character's animatory state
25757 BIT 0,(HL) Is the character midstride?
25759 JP Z,25256 Move to the next command in the command list if not
25762 JP 25627 Otherwise finish the stride
The character hasn't reached his destination yet. Figure out his next move.
25765 LD A,D A=character's y-coordinate
25766 CP 169 Set the zero flag if the character is on the bottom floor
25768 LD A,(HL) A=destination x-coordinate
25769 JP Z,25627 Jump if the character is on the bottom floor
The character is on the middle floor or the top floor. But which side of the wall?
25772 LD A,D A=character's y-coordinate
25773 CP 155 Set the zero flag if the character is on the top floor
25775 LD A,57 This is the x-coordinate of the wall between the Map and Reading Rooms
25777 JR Z,25781 Jump if the character is on the top floor
25779 LD A,38 This is the x-coordinate of the wall between the White and Exam Rooms
25781 CP E Is the character to the left of the wall?
25782 JR NC,25792 Jump if so
The character is on the right side of the wall.
25784 CP (HL) Compare the wall's x-coordinate (in A) with the destination x-coordinate
25785 LD A,(HL) A=destination x-coordinate
25786 JP C,25627 Jump if the character doesn't need to go down the stairs
25789 JP 25590 Send the character to the top of the staircase
The character is on the left side of the wall.
25792 CP (HL) Compare the wall's x-coordinate (in A) with the destination x-coordinate
25793 LD A,(HL) A=destination x-coordinate
25794 JP NC,25627 Jump if the character doesn't need to go down the stairs
25797 LD A,12 This is the x-coordinate of the tops of the staircases at the left of the skool
25799 JP 25592 Send the character to the top of the staircase
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