Dynamic Objects

Sonic is a playable object in Sonic the Hedgehog, appearing in all playable stages in the standard game mode GM_Level. Given that everything in a standard level operates around Sonic, much of the changes, fixes, and modifications are going to be centered around this object and its subroutines.

It is a dynamic object, loaded at the start of every standard level in GM_Level. In Sonic 1 and 2, as well as earlier iterations of S1Fixed, it had the object index $01.

Code File

_incObj/-- Sonic.asm

Routines

• Sonic_Main
• Sonic_Control
• Sonic_Hurt
• Sonic_Death
• Sonic_Restart
• Sonic_Drowned*

*This routine was added with redhotsonic's underwater handling fixes.

Subtypes

This object has no subtypes.

Object Status Table

	x0	x1	x2	x3	x4	x5	x6	x7	x8	x9	xA	xB	xC	xD	xE	xF
0x	ID	Render	Gfx	Gfx	Map	Map	Map	Map	XPos	XPos	XPos	XPos	YPos	YPos	YPos	YPos
1x	VelX	VelX	VelY	VelY	~	~	Height	Width	Priority	Priority	Frame	AniFrame	Anim	PrevAnim	FrameTime	DelayTime
2x	Inertia	Inertia	Status	DispWid	Routine	~	Angle	~	WallJump*	WallJump*	AutoRollFlag+	~	~	~	DblJumpFlag*	DblJumpProp*
3x	Invuln	Invinc	Shoes	~	~	CtrlLock**	FrontAngle	RearAngle	OnWheel	Status2nd*	RestartTimer	RestartTimer	Jumping	LRLock	PlatformAddr	PlatformAddr

• (+) This is the default function of this RAM byte, but also serves as the SpinDashFlag, if the relevant elective mod is enabled.
• (*) These OST variables are only used if certain elective mods are active.
• (**) This OST variable was previously a global RAM variable.

Sprite Data

• Art: _artunc/Sonic.unc (2,156 tiles; Uncompressed)
• Sprite Mappings: _maps/Sonic.asm
• DPLC Script: _maps/Sonic - DPLCs.asm
• VRAM Location: ArtTile_Sonic ($780)
• Animation Script: _anim/Sonic.asm

Later Game Equivalents

Sonic 2

• Obj01 - Sonic
• Obj02 - Tails

Sonic 3 & Knuckles

• Obj_Sonic - Sonic
• Obj_Tails - Tails
• Obj_Knuckles - Knuckles
• Obj_Sonic2P - Sonic (or Knuckles) in Competition Mode
• Obj_Tails2P - Tails in Competition Mode