2d Effect (RW Section)
|RW Stream Section|
2d Effect, formerly 2dfx, is one of Rockstar's custom sections. In GTA San Andreas it is used to store 2D effects, which were located in ide files in previous versions. The typical location in a SA dff section hierarchy is Clump > Geometry List > Geometry > Extension > 2d Effect.
There can be multiple effects per section, their types are defined by an ID.
- 1 Header
- 2 Entries
- 3 External Link
- 4 Tools and Scripts
A 2d Effect section starts with a 4 byte DWORD which is the number of 2d Effect entries that follow.
There is a common 20 byte header for each 2d Effect entry:
12 byte - FLOAT - Position vector in object space 4 byte - DWORD - Entry Type 4 byte - DWORD - Data Size
Entry Type defines the type of the 2d Effect entry, and Data Size the number of bytes that follow the first 20, until the next entry starts.
Entry Type 0 - Light
This type defines lights and has a size of 76 or 80 bytes.
- With size of 76 bytes
0x00 | RwRGBA color 0x04 | float coronaFarClip 0x08 | float pointlightRange 0x0C | float coronaSize 0x10 | float shadowSize 0x14 | BYTE coronaShowMode 0x15 | BYTE coronaEnableReflection 0x16 | BYTE coronaFlareType 0x17 | BYTE shadowColorMultiplier 0x18 | BYTE flags1 0x19 | char coronaTexName 0x31 | char shadowTexName 0x49 | BYTE shadowZDistance 0x4A | BYTE flags2 0x4B | BYTE padding
- With size of 80 bytes
0x00 | RwRGBA color 0x04 | float coronaFarClip 0x08 | float pointlightRange 0x0C | float coronaSize 0x10 | float shadowSize 0x14 | BYTE coronaShowMode 0x15 | BYTE coronaEnableReflection 0x16 | BYTE coronaFlareType 0x17 | BYTE shadowColorMultiplier 0x18 | BYTE flags1 0x19 | char coronaTexName 0x31 | char shadowTexName 0x49 | BYTE shadowZDistance 0x4A | BYTE flags2 0x4B | BYTE lookDirection_x 0x4C | BYTE lookDirection_y 0x4D | BYTE lookDirection_z 0x4E | BYTE padding
Flags 1 (flags1)
1 CORONA_CHECK_OBSTACLES 2 FOG_TYPE 4 FOG_TYPE 8 WITHOUT_CORONA 16 CORONA_ONLY_AT_LONG_DISTANCE 32 AT_DAY 64 AT_NIGHT 128 BLINKING1
Flags 2 (flags2)
1 CORONA_ONLY_FROM_BELOW 2 BLINKING2 4 UDPDATE_HEIGHT_ABOVE_GROUND 8 CHECK_DIRECTION 16 BLINKING3
Special corona type (coronaShowMode)
0 DEFAULT 1 RANDOM_FLASHING 2 RANDOM_FLASHIN_ALWAYS_AT_WET_WEATHER 3 LIGHTS_ANIM_SPEED_4X // Used on model 10 green bottles. Lights alternately switched on-off. 4 LIGHTS_ANIM_SPEED_2X // Used on skyscrapers in San Fierro 5 LIGHTS_ANIM_SPEED_1X 6 7 TRAFFICLIGHT 8 TRAINCROSSLIGHT 9 // Doesn't work (light is always disabled) 10 AT_RAIN_ONLY // Enables only in rainy weather 11 // 5s - on, 5s - off 12 // 6s - on, 4s - off 13 // 6s - on, 4s - off
Entry Type 1 - Particle effect
This type defines particle effects and has a size of 24 bytes.
24b - CHAR - particle effect name
The particle effect name is an entry in effects.fxp.
Entry Type 3 - Ped attractor
This section consists of 56 bytes data. It`s used for spawning peds (Like on ticketbooth, Windows of shops, Blackjack-tables,...) It includes information about the External Script ped is going to use when spawned, it`s facing angle and it`s behaviour.
4b - INT32 - Type (see below) 36b - RwMatrix3 - Rotation matrix 8b - CHAR - External script name 4b - INT32 - Ped-Existing-Probability 1b - BYTE - Unknown 1b - BYTE - Not used 1b - BYTE - Unknown 1b - BYTE - Not used
External script name field has to contain a name defined by 0884 opcode like PEDSLOT or TICKET. If the PED just stands/sits/lays, this field is set to 'none'.
The rotation matrix is used together with the position vector from the effect header to create a affine transformation matrix in object space.
Ped attractor types
0 PED_ATM_ATTRACTOR Ped uses ATM (at day time only) 1 PED_SEAT_ATTRACTOR Ped sits (at day time only) 2 PED_STOP_ATTRACTOR Ped stands (at day time only) 3 PED_PIZZA_ATTRACTOR Ped stands for few seconds 4 PED_SHELTER_ATTRACTOR Ped goes away after spawning, but stands if weather is rainy 5 PED_TRIGGER_SCRIPT_ATTRACTOR Launches an external script 6 PED_LOOK_AT_ATTRACTOR Ped looks at object, then goes away 7 PED_SCRIPTED_ATTRACTOR This type is not valid 8 PED_PARK_ATTRACTOR Ped lays (at day time only, ped goes away after 6 PM) 9 PED_STEP_ATTRACTOR Ped sits on steps
Entry Type 4 - Sun glare
This type of section uses only header data (i.e. position/type).
Entry Type 6 - Enter-Exit
Type may call game crash!
4b - FLOAT - Rotation angle enter-marker (relative to the object) (Always 0?) 4b - FLOAT - The radius of the approximation to the marker X 4b - FLOAT - The radius of the approximation to the marker Y 12b - FLOAT- The position of exit-marker (offset relative to the object) (Always 0?) 4b - FLOAT - angle of rotation exit-marker (relative to the object) (always 0?) 4b - INT32 - Number of interior 4b - INT32 - Flags? 8b - CHAR - The name of the interior 4b - INT32 - color of the sky
Entry Type 7 - Street sign
This type defines the texts that appear on street signs and has a size of 88 bytes.
0x00 | RwV2d size 0x08 | RwV3d rotation 0x14 | WORD flags 0x16 | RwChar text
Bits 0-1 - Number of used lines
0 - 4 lines 1 - 1 lines 2 - 2 lines 3 - 3 lines
Bits 2-3 - Max number of symbols in one line
0 - 16 symbols 1 - 2 symbols 2 - 4 symbols 3 - 8 symbols
Bits 4-5 - Text color
0 - 0xFFFFFFFF (white) 1 - 0xFF000000 (black) 2 - 0xFF808080 (grey) 3 - 0xFF0000FF (red)
The lines can start with arrows, such as
_ is used instead of a whitespace.
Entry Type 8 - Slotmachine-wheel
This is for Slotmachines.
4b - Int32 - Wheelindex
Every wheel in the slotmachine has an index, increments by 1 and starrting with 1. The position of the index is the position of the wheel in the Slotmachine. Maybe it can be controlled using SCM.
Entry Type 9 - Cover point
Size is 12 bytes, used quite often and in large ammounts per file.
4b - FLOAT - x direction 4b - FLOAT - y direction 4b - DWORD - cover type
This section defines a place where peds can cover during firefights.
Entry Type 10 - Escalator
This type defines escalators and has a size of 40 bytes.
12b - FLOAT - bottom of escalator (xyz) 12b - FLOAT - top of escalator (xyz) 12b - FLOAT - escalator end (Z pos, matches top Z if escalator goes up, bottom Z if it goes down) 4b - DWORD - direction 0/1 (down/up)
The normal position info of the header gets the same function of th estart-position in opposite to the end-position. Positions seem to be roundet to *.5 or *.0 by the game, so it doesnt make many sense to create escalators with the value of *.3 or *.7. This got the effect that a Escalator looks like in the picture (Example: vgseesc01.dff). Legend to the picture:
- Escalator_Standart_Position - Positioninfo from the header
- Escalator_Bottom - Bottominfo from the section
- Escalator_Top - Topinfo from the section
- Escalator_End - Endinfo from the section
Tools and Scripts
- GTAForums: DexX Tools by DexX – 2d Effect export from 3DSMax (MaxScript)
- GTAForums: 2dfx Editor by Aschratt – 2d Effect editing
- RW Analyze by steve-m (no 2d Effect support yet, but needed by above script)
- GTAForums: 2dfx Tool by DK22Pac – 2d Effect editing