Difference between revisions of "Entity"

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<!--Mostly from https://dl.dropboxusercontent.com/s/fu29g6xn97sa4pl/crash2fileformat.html-->
 
<!--Mostly from https://dl.dropboxusercontent.com/s/fu29g6xn97sa4pl/crash2fileformat.html-->
 
<!--Majorly incomplete-->
 
<!--Majorly incomplete-->
An ''entity'' is an item that stores a collection of values (hereafter referred to as "fields") that can represent a game [[object]]/camera rail in Crash 2 and 3.
+
:''This article is for the ''Crash 2/3'' entity format.''
 +
An '''''entity''''' is an item that stores a collection of values (hereafter referred to as "fields") that can represent either a game [[object]] or a camera rail in Crash 2 and 3.
 
==Format==
 
==Format==
===Crash 2/3===
 
 
{|class="article-table"
 
{|class="article-table"
 +
!Offset
 
!Field
 
!Field
 
!Size
 
!Size
 
!Value
 
!Value
 
|-
 
|-
|Length
+
|0x0
 +
|Length of this item
 
|4 bytes
 
|4 bytes
|Total length of this item
+
|*
 
|-
 
|-
|Unknown
+
|0x4
|4 bytes x 2
+
|Parent Zone Pointer (reserved)
 +
|4 bytes
 
|*
 
|*
 
|-
 
|-
 +
|0x8
 +
|Parent Entity Pointer (reserved)
 +
|4 bytes
 +
|*
 +
|-
 +
|0xC
 
|Field count
 
|Field count
 
|4 bytes
 
|4 bytes
 +
|hc
 +
|-
 +
|0x10
 +
|Field info structures (headers)
 +
|hc * 8 bytes
 +
|*
 +
|-
 +
|>=0x18
 +
|Field data structures (data)
 +
|(varies)
 
|*
 
|*
 
|-
 
|-
|colspan="4"|Field Info Structure ''h''
+
!colspan="4"|''Field Info Structure''
 
|-
 
|-
 +
|0x0
 
|Type
 
|Type
 
|2 bytes
 
|2 bytes
 
|*
 
|*
 
|-
 
|-
|Offset relative to 12 bytes at the start of the item
+
|0x2
 +
|Offset to the ''field data'' relative to 12 bytes at the start of the item
 
|2 bytes
 
|2 bytes
|*
+
|offset
 
|-
 
|-
 +
|0x4
 
|Flags
 
|Flags
 
|Byte
 
|Byte
 
|*
 
|*
 
|-
 
|-
 +
|0x5
 
|Element size
 
|Element size
 
|Byte
 
|Byte
 
|es
 
|es
 
|-
 
|-
|Unknowm
+
|0x6
 +
|Group count
 
|2 bytes
 
|2 bytes
|*
+
|rc
 
|-
 
|-
|colspan="4"|Field Structure ''f''
+
!colspan="4"|''Field Data Structure''
 
|-
 
|-
 +
|0x0
 
|Element count
 
|Element count
|2 bytes
+
|2 bytes * rc
 
|ec
 
|ec
 
|-
 
|-
|Unknown
+
|0x0 + rc * 2
|2 bytes
+
|Metavalues (not present if flag 32 not set)
 +
|2 bytes * rc
 
|*
 
|*
 
|-
 
|-
 +
|0x0 + rc * 4
 
|Data
 
|Data
|es * ec
+
|es * ec * rc
 
|*
 
|*
 
|-
 
|-
|Unknown
 
|? bytes
 
|*
 
 
|}
 
|}
 +
 
==Type==
 
==Type==
 
The format and usage of the field data depends on the field type. Incomplete list.
 
The format and usage of the field data depends on the field type. Incomplete list.
Line 68: Line 93:
 
!Purpose
 
!Purpose
 
!Format
 
!Format
 +
!Uses Metavalues?
 +
|-
 +
|0x29
 +
|Camera Mode
 +
|Determines the behavior of the camera trail - similar to ''Crash 1'' camera mode
 +
|UInt8 (''Crash 2'')<br />Int32 (''Crash 3'')
 +
|No
 
|-
 
|-
 
|0x2C
 
|0x2C
 
|Name
 
|Name
|String of characters for the internal name used to refer to the entity. It has no purpose so whatever you put here won't affect the game
+
|String of characters for the internal name used to refer to the entity. Its only purpose is for the devs to distinguish entities so whatever you put here won't directly affect the game
|UTF-8 charset
+
|Unspecified
 +
|No
 +
|-
 +
|0x32
 +
|Depth modifier
 +
|Modifier optionally applied to the object, usually to correct bad automatic depth sorting (i.e. force objects to appear behind certain scenery)
 +
|Int32
 +
|No
 
|-
 
|-
 
|0x4B
 
|0x4B
|Object position
+
|Position
|List of position points to be used by the entity. Multiple of these can be used to make the entity follow a path (as long as it is programmed to do so)
+
|List of position points to be used by the entity. More than one position can be used to make the entity follow a path (as long as it is programmed to do so)
 
|Int16 for each X, Y and Z coordinate
 
|Int16 for each X, Y and Z coordinate
 +
|No
 
|-
 
|-
 
|0x9F
 
|0x9F
 
|ID
 
|ID
|Value to uniquely identify the entity that is used to draw it, destroy it (see victims below) and other miscellaneous behaviors
+
|Value to uniquely identify the entity that is used to draw it, destroy it, and other miscellaneous behavior
|Int32<sup>1</sup>
+
|Int32'''<sup>1</sup>'''
 +
|No
 
|-
 
|-
 
|0xA4
 
|0xA4
|General Settings
+
|Arguments
|List of values that can be used to change a certain object's behavior (i.e. flags, delay, speed)
+
|List of values that affect an object's behavior (i.e. flags, timings, speed, etc.). These are the arguments pushed to GOOL stack before the object's appropriate spawn code runs.
|Int32 (UInt8 + Int24)
+
|Int32
 +
|No
 
|-
 
|-
 
|0xA9
 
|0xA9
 
|Type
 
|Type
|Type of the entity<!--Index of T11 entry in T11 entry list in the [[NSD]]?-->
+
|Type of the entity (index of GOOL entry in GOOL entry list in the [[NSD]])
 
|Int32
 
|Int32
 +
|No
 
|-
 
|-
 
|0xAA
 
|0xAA
 
|Subtype
 
|Subtype
|Variant of the entity
+
|Variant of the entity - used as an index to the subtype table when spawning the object
 
|Int32
 
|Int32
 +
|No
 +
|-
 +
|0xC9
 +
|Camera movement unit
 +
|Specifies the amount of "distance" between two camera points. This "distance" translates to a multiplication of the direction vector for Crash-linked camera modes, is not necessary on automatic trails
 +
|Int32
 +
|No
 +
|-
 +
|0x103
 +
|SLST EID
 +
|EID of the SLST [[entry]] to be used by this camera trail
 +
|Int32
 +
|No
 +
|-
 +
|0x109
 +
|Neighbor camera trails
 +
|Contains information about neighboring camera trails. If one position contains multiple trails, special collision nodes may determine which to use. Trail settings are same as ''Crash 1'', in reverse order.
 +
|Int32
 +
|Yes
 +
|-
 +
|0x118
 +
|Misc Settings 1
 +
|???
 +
|Int32
 +
|No
 +
|-
 +
|0x130
 +
|Field-of-View timeline
 +
|Determines the field of view. A value of 288 is the "normal" field of view. The end result is interpolated between the "keyframes" of this property. It is unknown if multiple FOV values can be used on the same position.
 +
|Int32
 +
|Yes
 +
|-
 +
|0x13B
 +
|Draw List A
 +
|List of values that determine which entities should despawn while the camera is in this zone - includes zone index and entity index'''<sup>2</sup>'''
 +
|Int32
 +
|Yes
 +
|-
 +
|0x13C
 +
|Draw List B
 +
|List of values that determine which entities should spawn while the camera is in this zone - includes zone index and entity index'''<sup>2</sup>'''
 +
|Int32
 +
|Yes
 +
|-
 +
|0x173
 +
|Camera index
 +
|Specifies the index of this entity within the zone's list of cameras
 +
|Int32
 +
|No
 +
|-
 +
|0x174
 +
|Camera sub-index
 +
|Specifies the index of this entity within the camera's list of entities (i.e. values should be 0, 1 or 2)
 +
|Int32
 +
|No
 +
|-
 +
|0x208
 +
|Load List A
 +
|List of EIDs to load when the camera is in this zone'''<sup>2</sup>'''
 +
|Int32
 +
|Yes
 +
|-
 +
|0x209
 +
|Load List B
 +
|List of EIDs to deload when the camera is in this zone'''<sup>2</sup>'''
 +
|Int32
 +
|Yes
 +
|-
 +
|0x277
 +
|Misc Settings 2
 +
|Value that can be used to change a certain object's DDA behavior (i.e. deaths until DDA checkpoint) or other settings like Y rotation.(?)
 +
|Int32
 +
|No
 
|-
 
|-
 
|0x287
 
|0x287
|Victim
+
|Victims
|List of entity IDs to destroy on certain occasions (i.e. TNT is undrawn, Nitro Switch activated)
+
|List of entity IDs to destroy on certain occasions (i.e. TNT is despawned, Nitro Switch activated)
 
|Int16
 
|Int16
 +
|No
 +
|-
 +
|0x288
 +
|Section ID
 +
|Value to uniquely identify a "section" of the level and is used in checkpoints for the game to know which DDA checkpoints have been triggered and at what point in the level the player is (i.e. First real checkpoint has this set to 1, the next DDA checkpoint will have a 1 too, the next real checkpoint will have a 2, etc.)
 +
|Int32
 +
|No
 +
|-
 +
|0x28B
 +
|Box count
 +
|Number of boxes in the level;<br>Only used by obj_willy
 +
|Int32
 +
|No
 +
|-
 +
|0x2A0
 +
|Parent box ID
 +
|Parent box ID, passed to spawned fruit from a box
 +
|Int32
 +
|No
 +
|-
 +
|0x30E
 +
|Scale modifier
 +
|Indicates the scale of the object. ''Crash 3''-only;<br/>0 = Position/4 in-game; 1 = Position/2 in-game; 2 = Normal; 3 = Position*2 in-game; etc.
 +
|Int32
 +
|No
 +
|-
 +
|0x336
 +
|Time Trial reward
 +
|Affects what the crate will reward (and consequentially turn into) during time trial mode. ''Crash 3''-only
 +
|Int32
 +
|No
 +
|-
 +
|0x337
 +
|Bonus box count
 +
|Number of boxes in the level's bonus;<br>Only used by obj_willy. ''Crash 3''-only
 +
|Int32
 +
|No
 
|}
 
|}
<sup>1</sup> - Draw lists store this as an Int16, so setting this to a value higher than that will cause severe issues.
+
'''<sup>1</sup>''' Should fall within Int16 boundaries, as it is the common type used for entity ID-related operations.
 +
 
 +
'''<sup>2</sup>''' The roles of these lists is reversed when the camera is going backwards.
 +
 
 +
'''NOTE:''' When proceeding from one camera path to the next, all entities should be despawned at the "connection" point for proper disposal of resources. Same applies to entry loading and disposal, as the game seems smart enough not to dispose of resources it's also immediately told to load.

Latest revision as of 22:57, 14 April 2020

This article is for the Crash 2/3 entity format.

An entity is an item that stores a collection of values (hereafter referred to as "fields") that can represent either a game object or a camera rail in Crash 2 and 3.

Format

Offset Field Size Value
0x0 Length of this item 4 bytes *
0x4 Parent Zone Pointer (reserved) 4 bytes *
0x8 Parent Entity Pointer (reserved) 4 bytes *
0xC Field count 4 bytes hc
0x10 Field info structures (headers) hc * 8 bytes *
>=0x18 Field data structures (data) (varies) *
Field Info Structure
0x0 Type 2 bytes *
0x2 Offset to the field data relative to 12 bytes at the start of the item 2 bytes offset
0x4 Flags Byte *
0x5 Element size Byte es
0x6 Group count 2 bytes rc
Field Data Structure
0x0 Element count 2 bytes * rc ec
0x0 + rc * 2 Metavalues (not present if flag 32 not set) 2 bytes * rc *
0x0 + rc * 4 Data es * ec * rc *

Type

The format and usage of the field data depends on the field type. Incomplete list.

Type Name Purpose Format Uses Metavalues?
0x29 Camera Mode Determines the behavior of the camera trail - similar to Crash 1 camera mode UInt8 (Crash 2)
Int32 (Crash 3)
No
0x2C Name String of characters for the internal name used to refer to the entity. Its only purpose is for the devs to distinguish entities so whatever you put here won't directly affect the game Unspecified No
0x32 Depth modifier Modifier optionally applied to the object, usually to correct bad automatic depth sorting (i.e. force objects to appear behind certain scenery) Int32 No
0x4B Position List of position points to be used by the entity. More than one position can be used to make the entity follow a path (as long as it is programmed to do so) Int16 for each X, Y and Z coordinate No
0x9F ID Value to uniquely identify the entity that is used to draw it, destroy it, and other miscellaneous behavior Int321 No
0xA4 Arguments List of values that affect an object's behavior (i.e. flags, timings, speed, etc.). These are the arguments pushed to GOOL stack before the object's appropriate spawn code runs. Int32 No
0xA9 Type Type of the entity (index of GOOL entry in GOOL entry list in the NSD) Int32 No
0xAA Subtype Variant of the entity - used as an index to the subtype table when spawning the object Int32 No
0xC9 Camera movement unit Specifies the amount of "distance" between two camera points. This "distance" translates to a multiplication of the direction vector for Crash-linked camera modes, is not necessary on automatic trails Int32 No
0x103 SLST EID EID of the SLST entry to be used by this camera trail Int32 No
0x109 Neighbor camera trails Contains information about neighboring camera trails. If one position contains multiple trails, special collision nodes may determine which to use. Trail settings are same as Crash 1, in reverse order. Int32 Yes
0x118 Misc Settings 1 ??? Int32 No
0x130 Field-of-View timeline Determines the field of view. A value of 288 is the "normal" field of view. The end result is interpolated between the "keyframes" of this property. It is unknown if multiple FOV values can be used on the same position. Int32 Yes
0x13B Draw List A List of values that determine which entities should despawn while the camera is in this zone - includes zone index and entity index2 Int32 Yes
0x13C Draw List B List of values that determine which entities should spawn while the camera is in this zone - includes zone index and entity index2 Int32 Yes
0x173 Camera index Specifies the index of this entity within the zone's list of cameras Int32 No
0x174 Camera sub-index Specifies the index of this entity within the camera's list of entities (i.e. values should be 0, 1 or 2) Int32 No
0x208 Load List A List of EIDs to load when the camera is in this zone2 Int32 Yes
0x209 Load List B List of EIDs to deload when the camera is in this zone2 Int32 Yes
0x277 Misc Settings 2 Value that can be used to change a certain object's DDA behavior (i.e. deaths until DDA checkpoint) or other settings like Y rotation.(?) Int32 No
0x287 Victims List of entity IDs to destroy on certain occasions (i.e. TNT is despawned, Nitro Switch activated) Int16 No
0x288 Section ID Value to uniquely identify a "section" of the level and is used in checkpoints for the game to know which DDA checkpoints have been triggered and at what point in the level the player is (i.e. First real checkpoint has this set to 1, the next DDA checkpoint will have a 1 too, the next real checkpoint will have a 2, etc.) Int32 No
0x28B Box count Number of boxes in the level;
Only used by obj_willy
Int32 No
0x2A0 Parent box ID Parent box ID, passed to spawned fruit from a box Int32 No
0x30E Scale modifier Indicates the scale of the object. Crash 3-only;
0 = Position/4 in-game; 1 = Position/2 in-game; 2 = Normal; 3 = Position*2 in-game; etc.
Int32 No
0x336 Time Trial reward Affects what the crate will reward (and consequentially turn into) during time trial mode. Crash 3-only Int32 No
0x337 Bonus box count Number of boxes in the level's bonus;
Only used by obj_willy. Crash 3-only
Int32 No

1 Should fall within Int16 boundaries, as it is the common type used for entity ID-related operations.

2 The roles of these lists is reversed when the camera is going backwards.

NOTE: When proceeding from one camera path to the next, all entities should be despawned at the "connection" point for proper disposal of resources. Same applies to entry loading and disposal, as the game seems smart enough not to dispose of resources it's also immediately told to load.