Routines
Prev: 42035 Up: Map Next: 42616
42481: Handle Sabreman Jumping
Handler for the object types 17 to 20 which are the jumping sprites of Sabreman (17 and 18 when he jumps to the left and 19 and 20 when he jumps to the right).
The countdown in the object record is decreased on every call. When it reaches 3 the sprite moves on to the next frame, and when it reaches zero the jump is over and the sprite becomes 21 or 22 (falling), so that Handle_Sabreman_Falling takes over. The controls steer him left or right while he is in the air.
At the end of the jump the y position is moved up by 4 and the countdown is set to 12. If that takes him into the top part of the room and the room has a ceiling, he hits it and tumbles at Continue_Sabreman_Tumbling.
Input
IX Object record of Sabreman
Save the state of the object, then deal with the special states in the same way as Handle_Sabreman_Walking.
Handle_Sabreman_Jumping 42481 CALL StoreEntity Remember the position and sprite id of Sabreman.
42484 BIT 6,(IX+15) Jump to Start_Being_Carried if Sabreman is being carried (bit 6 of the redraw flags).
42488 JP NZ,Start_Being_Carried
42491 BIT 7,(IX+15) Jump to Start_Tumbling if Sabreman is tumbling (bit 7 of the redraw flags).
42495 JP NZ,Start_Tumbling
42498 CALL Read_World_Map Read the world map entry of the room.
42501 CALL Check_Bubble_Contact Check for contact with the bubbles.
Decrease the countdown. When it reaches zero the jump ends at Handle_Sabreman_Jumping_Finish.
42504 DEC (IX+10) Decrease the jump countdown and jump to Handle_Sabreman_Jumping_Finish if the jump is over.
42507 JR Z,Handle_Sabreman_Jumping_Finish
42509 LD A,(IX+10) Fetch the jump countdown and jump to Handle_Sabreman_Jumping_Read_Controls unless it has reached 3.
42512 CP 3
42514 JR NZ,Handle_Sabreman_Jumping_Read_Controls
42516 INC (IX+0) Move on to the next frame of the jumping sprite, as he is at the top of the jump.
Read the controls. Bit 0 clear sets an x velocity of 2 and moves to the frames for jumping to the right. Bit 1 clear sets an x velocity of 254 and moves to the frames for jumping to the left. If neither is clear the velocity is unchanged.
Handle_Sabreman_Jumping_Read_Controls 42519 CALL ReadControls Read the controls.
42522 BIT 0,A Jump to Handle_Sabreman_Jumping_Move_Right if the right control is used (bit 0 of the controls is clear).
42524 JR Z,Handle_Sabreman_Jumping_Move_Right
42526 BIT 1,A Jump to Update_Object_Sprite if the left control is not used either (bit 1 of the controls is set).
42528 JP NZ,Update_Object_Sprite
42531 LD (IX+6),254 Set the x velocity of Sabreman to 254 (moving left).
42535 LD A,(IX+0) Switch to the frame for jumping to the left.
42538 DEC A
42539 RES 1,A
42541 INC A
42542 LD (IX+0),A Set the sprite id.
42545 JP Update_Object_Sprite Jump to Update_Object_Sprite.
Handle_Sabreman_Jumping_Move_Right 42548 LD (IX+6),2 Set the x velocity of Sabreman to 2 (moving right).
42552 LD A,(IX+0) Switch to the frame for jumping to the right.
42555 DEC A
42556 SET 1,A
42558 INC A
42559 LD (IX+0),A Set the sprite id.
42562 JP Update_Object_Sprite Jump to Update_Object_Sprite.
The jump is over. The sprite id becomes 21 (when the jump was to the left) or 22 (when it was to the right).
Handle_Sabreman_Jumping_Finish 42565 LD A,(IX+0) Fetch the sprite id of Sabreman.
42568 DEC A Decrease the sprite id.
42569 RRA Rotate it right, which leaves the direction in bit 0.
42570 AND %00000001 Keep only the direction (0 for left, 1 for right).
42572 ADD A,21 Add 21 to make the sprite id for falling in that direction.
42574 LD (IX+0),A Set the sprite id.
42577 CALL Read_World_Map Read the world map entry of the room.
42580 LD A,(IX+11) Fetch the contact flags of Sabreman.
42583 OR E Combine the contact flags of Sabreman with the contact flags of the room.
42584 LD E,A
42585 LD A,(IX+3) Fetch the y position of Sabreman.
42588 SUB 4 Take 4 off the y position of Sabreman.
42590 CP 73 Jump to Handle_Sabreman_Jumping_Land if he is not in the top part of the room (y position of at least 73).
42592 JR NC,Handle_Sabreman_Jumping_Land
42594 LD (IX+11),68 Mark the walls on both sides as solid by setting the contact flags to 68 as he is in the upper part of the room.
42598 BIT 0,E Jump to Continue_Sabreman_Tumbling if he hits the ceiling (bit 0 of the contact flags is set).
42600 JP NZ,Continue_Sabreman_Tumbling
Handle_Sabreman_Jumping_Land 42603 LD (IX+3),A Store the new y position of Sabreman.
42606 LD (IX+10),12 Set the countdown of Sabreman to 12.
42610 CALL SoundsSword Play the sword sound (see SoundsSword).
42613 JP Update_Object_Sprite Jump to Update_Object_Sprite.
Prev: 42035 Up: Map Next: 42616