<- $33: Pushable Blocks	Object List	$3B: Purple Rock ->

The Spikes are objects in Sonic the Hedgehog, appearing in every zone of the game, except for Final Zone (though they can be spawned in via Debug Mode). They are a solid object, with one side being painful to the touch. Due to a collision bug, Sonic can actually take damage from two side of the object: The pointed end, and the flat end on the opposite side of the pointed end.

File: _incObj/36 Spikes.asm

Changes from Sonic 1

• Word-length obPriority pointer due to the new Priority Manager.
• Word-length obRespawnAddr added due to the S3K Object Manager.

This object's subtype follows the following bit format: %0SSSMMMM.

• MMMM - The lower nybble dictates spike movement behavior.

  • If the value == 0: The spikes don't move.
  • If the value == 1: The spikes move up and down.
  • If the value > 1: The spikes move left and right.

• 0SSS - The upper nybble dictates the size and orientation of the spikes.

  • 0x - 3 vertical spikes (pointed up by default)
  • 1x - 3 horizontal spikes (pointed left by default)
  • 2x - 1 vertical spike
  • 3x - 3 wide vertical spikes
  • 4x - 6 wide vertical spikes
  • 5x - 1 horizontal spike

• Type: Full

The solidity for this object is dependent on its subtype.

• Width: 31px
• Height (jumping): 16px
• Height (walking): 17px

• Width: 27px
• Height (jumping): 32px
• Height (walking): 33px

• Width: 15px
• Height (jumping): 16px
• Height (walking): 17px

• Width: 39px
• Height (jumping): 16px
• Height (walking): 17px

• Width: 75px
• Height (jumping): 16px
• Height (walking): 17px

• Width: 27px
• Height (jumping): 4px
• Height (walking): 5px

	x0	x1	x2	x3	x4	x5	x6	x7	x8	x9	xA	xB	xC	xD	xE	xF
0x	Render	Addr	Addr	Addr	Gfx	Gfx	Map	Map	Map	Map	XPos	XPos	XPos	XPos	YPos	YPos
1x	YPos	YPos	~	~	~	~	RespawnAddr	RespawnAddr	~	~	Priority	Priority	Frame	~	~	~
2x	~	~	~	DispWid	~	~	~	~	~	~	~	~	~	~	~	~
3x	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~