Network Subfiles
This page pertains to the format of the Network Subfiles within the Savegame files. These files have Type IDs 6A0F82B2 (Network Index), C9C05C6E (Network Subfile 1) and CA16374F (Network Subfile 2). They can be viewed using the SC4 Savegame Explorer, but not edited. These subfiles were decoded by RippleJet and completed by smf_16.
Contents
- 1 Network Index Subfile (6A0F82B2)
- 2 Network Subfile 1 (C9C05C6E)
- 2.1 Structure
- 2.1.1 Network Subfile 1 Body
- 2.1.2 Appendix 2.1 - Structure of SGPROP (SaveGame Properties)
- 2.1.3 Appendix 2.2 - Apperance Flag (offset 0x0013)
- 2.1.4 Appendix 2.3 - Orientation
- 2.1.5 Appendix 2.4 - Network Type
- 2.1.6 Appendix 2.5 - Connections
- 2.1.7 Appendix 2.6 - Wealth Textures
- 2.1.8 Appendix 2.7 - Base textures
- 2.1.9 Appendix 2.8 - Construction states
- 2.1.10 Appendix 2.9 - Retaining wall textures
- 2.1 Structure
- 3 Network Subfile 2 (CA16374F)
- 4 Prebuilt Network Subfile (0x49c1a034)
Network Index Subfile (6A0F82B2)
Description
This index file contains a list of all network tiles, with links to the two network files where the records can be found.
Network Index Subfile Structure
Network Index Subfile Body
DWORD Subfile Size in bytes DWORD CRC DWORD Memory address WORD Major Version (0x0007 for built cities, but 0x0003 for Maxis' own, unbuilt cities) DWORD City Tile Count (4096, 16384 or 65536 depending on city size) DWORD Count of Network Tiles (0 for a new city) DWORD Tile Number (See Appendix 1.1 for more information) DWORD Link: Memory address DWORD Link: Subfile Type ID DWORD Count of blocks (either 0 or 10) DWORD Block Number (first one is 0, last one is 9) DWORD Count (anything between 0-16. Number of byte blocks) BYTE×8 Unknown block of bytes. Small numbers < 10 DWORD Count of pointers to follow DWORD Memory address of automata DWORD Type ID of automata. Seen 0x896e75af (cSC4Pedestrian), 0x4a416254 (cSC4TrainCard), 0x896e714a (cSC4Vehicle), 0xaa9f4a3d (cSC4Bus) and 0x4a5b69ed (cSC4TrailerVehicle). Other automata might exist as well, refer to all Type ids in Savegames. BYTE Unknown (always 0x00) DWORD Unknown (Seen 0 and 2) DWORD Unknown (Only seen 2) DWORD Unknown (Seen 0 and 4) FLOAT32 Unknown (Small values, e.g. 0.0, 2.0, 5.0, 6.0, 8.0) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) FLOAT32 Unknown (Small values, e.g. 0.0, 2.0, 5.0, 6.0, 8.0) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) FLOAT32 Unknown (Small values, e.g. 0.0, 2.0, 5.0, 6.0, 8.0) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) FLOAT32 Unknown (Small values, e.g. 0.0, 2.0, 5.0, 6.0, 8.0) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (0 or 1) WORD Unknown (always 0) DWORD Count of blocks to follow DWORD Block number BYTEx4 4 Unknown bytes (perhaps a float? Values don't make sense though). WORD Unknown (only seen 0x00) DWORD Count of network intersections (such as + and T intersections) in city DWORD Link: Memory address DWORD Link: Subfile Type ID of a network subfile BYTE Unknown (only seen 0x00) DWORD Unknown (only seen 0x00000000) # The values below seem to indicate what directions are enabled on this # network. That's why they are repeated 4 times for west, north, east # and south. DWORD Count of meaningful blocks of bytes to follow. Note that there are **always** 3 blocks, regardless of the value of this DWORD, but if the count is for example 2, then the last block contains garbage data, probably due to uninitialized memory that hasn't been consumed by the game. Hence can be 0, 1, 2 or 3. BOOLEAN Unknown (either 0 or 1) # Repeat 3 times, regardless of count above. BYTEx2 Unknown. Often 0, but on developed cities other values have been observed as well. Might be uninitialized garbage data. BYTEx2 Unknown. 0xc0 0x40 for road intersections, 0x00 0x41 for intersections with avenues. 0x00 0x00 for rail intersections. Might be flags that indicate what changes of direction are possible. (i.e. none for rail). DWORD Count of transit-enabled lot tiles to follow WORD Z tile WORD X tile DWORD Unknown (always 0x00000001) DWORD Memory address of network tile DWORD Type ID of network (0xc9c05c6e) DWORD Unknown (only seen 0x00000000) DWORD Unknown (only seen 0x00000000) DWORD Tile X (63, 127 or 255 for a new city, smaller for built up cities, probably max coordinate that ever has had a network) DWORD Tile Z (63, 127 or 255 for a new city, smaller for built up cities, probably max coordinate that ever has had a network) FLOAT32 Unknown (Small value. 0.00 for a new city) BOOLEAN Unknown (always 1, true) FLOAT32 Unknown (Small value. 0.00 for a new city) BOOLEAN Unknown (always 1, true) DWORD Count of blocks to follow (Does not appear if version = 0x0003) DWORD Memory address DWORD Type ID of network (seen 0xc9c05c6e and 0x49c1a034). DWORD Count of DWORDs to follow (only seen 0x00000000 though) DWORD Unknown (never seen, but assumed, see below) WORD Unknown (all kinds of values, change when saving without doing anything) DWORD Count of DWORDs to follow DWORD Unknown, might as well be 4 bytes WORD Unknown (all kinds of values, change when saving without doing anything) DWORD Count of DWORDs to follow DWORD Unknown, might as well be 4 bytes WORD Unknown (all kinds of values, change when saving without doing anything) DWORD Count of DWORDs to follow DWORD Unknown, might as well be 4 bytes WORD Unknown (all kinds of values, change when saving without doing anything)
Appendix 1.1
Tile numbering starts in the NW corner, which is tile number 0x00000000.
- Tile number 0x00000001 is to the east of that tile.
- In a small city, the first tile in the second row is 0x00000040.
- In a medium city, the first tile in the second row is 0x00000080.
- In a large city, the first tile in the second row is 0x00000100.
- In a small city, the last tile in the last row is 0x00000FFF.
- In a medium city, the last tile in the last row is 0x00003FFF.
- In a large city, the last tile in the last row is 0x0000FFFF.
Network Subfile 1 (C9C05C6E)
Structure
Network Subfile 1 Body
List of texture-based network tiles consisting of records of the form:
DWORD Record Size DWORD CRC DWORD Memory WORD Version Major (0x0008) WORD Version Minor (0x0004) WORD Zot Bytes (Always 0x0000) BYTE 0x00 BYTE Appearance Flag (Always 0x05) (See Appendix 2.2 for more information) DWORD 0xC772BF98 (always the same) BYTE Min Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Min Tract Z Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract Z Coordinate (normally between 0x40 and 0x7F) WORD X Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) WORD Z Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) DWORD Count of Properties SGPROP SaveGame Properties, repeated Count times (See Appendix 2.1 for more information) DWORD Group ID (always 0x00000000) DWORD Type ID (always 0x00000000) DWORD Instance ID (always 0x00000000) BYTE Unknown Flag (0 or 1) FLOAT32 X Coordinate FLOAT32 Y Coordinate FLOAT32 Z Coordinate # Next follows 4 times a data structure that contains information for # drawing a texture. 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping 4 x BYTE (r, g, b, a) values indicating a color (always #dedbddff). DWORD TextureID / PathID BYTE Wealth texture (See Appendix 2.6) DWORD Base texture (See Appendix 2.7) BYTE Orientation (See Appendix 2.3 for more information) BYTES×2 Unknown (Small values) Byte Flag for crossings (1 = crossings of two networks, 0 = single network) BYTE Network Type (See Appendix 2.4 for more information) BYTE Connection, West (See Appendix 2.5 for more information) BYTE Connection, North (See Appendix 2.5 for more information) BYTE Connection, East (See Appendix 2.5 for more information) BYTE Connection, South (See Appendix 2.5 for more information) DWORD Number of blocks for retaining walls DWORD Retaining wall texture IID (See Appendix 2.9) # Followed by three vertex blocks of the form: Float32×5 (x, y, z, u, v) coordinates BYTE×4 (r, g, b, a) color FLOAT32 Xmin FLOAT32 Xmax FLOAT32 Ymin FLOAT32 Ymax FLOAT32 Zmin FLOAT32 Zmax DWORD Construction states (See Appendix 2.8) DWORD×4 Unknown (All 0) DWORD Demolishing costs DWORD Unknown (0x00000000)
Appendix 2.1 - Structure of SGPROP (SaveGame Properties)
DWORD Property Name Value DWORD Property Name Value (doubled for some unknown reason) DWORD 0x00000000 BYTE Data Type, 01=UInt8, 02=UInt16, 03=UInt32, 07=SInt32, 08=SInt64, 09=Float32, 0B=Boolean BYTE KeyType, 0x00 = 0 reps, 0x80 = more than 0 reps WORD 0x0000 DWORD Rep Count (this one appears only if KeyType = 0x80) DATA Property Value (repeated Rep Count times, type according to Data Type)
SaveGame Properties
Properties known to appear on network tiles are listed below (See also the Prop Subfile).
0x4835C6A6 (Boolean) = Unknown (1?) 0x4835C6A7 (UInt32×2) = TE-Lot network flags: DWORD - Unknown (0?) DWORD - Flags (0xSSEENNWW) (0x00000000 if custom path is used) 0x4835C6A9 (UInt32) = TE-Lot custom path IID 0x4835C6AA (Byte) = Bitmask for Onewayroad directions: 0b00000001 - Edge West: direction West to East 0b00000010 - Edge West: direction East to West 0b00000100 - Edge North: direction North to South 0b00001000 - Edge North: direction South to North 0b00010000 - Edge East: direction West to East 0b00100000 - Edge East: direction East to West 0b01000000 - Edge South: direction North to South 0b10000000 - Edge South: direction South to North 0x4835C6AB (UInt32) = Unknown (some flags related to puzzle pieces?) 0xAA24AE57 (UInt32) = Unknown (0?)
Appendix 2.2 - Apperance Flag (offset 0x0013)
0x01 (00000001b) - Network that appears in the game (if this is off, the network has been deleted) 0x02 (00000010b) - ? (unused) 0x04 (00000100b) - ? (always on) 0x08 (00001000b) - ? (unused) 0x40 (01000000b) - The network is burnt 0x80 (10000000b) - ? (unused)
Appendix 2.3 - Orientation
0x00 = North 0x01 = East 0x02 = South 0x03 = West 0x80 = North, mirrored 0x81 = East, mirrored 0x82 = South, mirrored 0x83 = West, mirrored
Appendix 2.4 - Network Type
0x00 = Road 0x01 = Rail 0x02 = Elevated Highway 0x03 = Street 0x04 = Pipe 0x05 = Powerline 0x06 = Avenue 0x07 = Subway 0x08 = Lightrail 0x09 = Monorail 0x0a = Onewayroad 0x0b = Dirtroad 0x0c = Ground Highway
Appendix 2.5 - Connections
The Network Flags are denoted in octal representation in RUL files:
0x00 = 0o00 (no connection) 0x01 = 0o01 (diagonal left) 0x02 = 0o02 (orthogonal) 0x03 = 0o03 (diagonal right) 0x04 = 0o04 (median) 0x09 = 0o11 (blend left) 0x0b = 0o13 (blend right) 0x11 = 0o21 (diagonal switch left) 0x13 = 0o23 (diagonal switch right) ... 0x32 = 0o62 (wye) ...
Appendix 2.6 - Wealth Textures
0 = default texture 1 = grass/low density (wealth textures 0x10, 0x20, 0x30) 4 = medium/high density (wealth textures 0x40, 0x50, 0x60) 7 = I-ag/landfill (wealth texture 0x70)
Appendix 2.7 - Base textures
0x00000000 = None 0x08100000 = Pavement $ 0x08200000 = Pavement $$ 0x08300000 = Pavement $$$ 0x08400000 = Dirt
Appendix 2.8 - Construction states
This bitset encodes which networks are present on the tile, whether the tile has been fully constructed, as well as several other flags. Some dual-networks like HRW built by the over-click method can only be seen here.
0x00000001 = Road (bit 0) 0x00000002 = Rail (bit 1) 0x00000004 = Highway (bit 2) ... (see Appendix 2.4) 0x00000800 = Dirtroad (bit 11) 0x00001000 = Ground Highway (bit 12) --- 0x00002000 = matching path file exists (for TE tiles: set if fully connected to network) 0x00004000 = network not fully constructed yet (always set for TE tiles?) 0x00008000 = rendering state (set if tile has been displayed since last rotation of the map) --- 0x00100000 = static puzzle piece 0x00200000 = TE tile 0x00400000 = static puzzle piece 0x01000000 = terrain triangles transposed 0x02000000 = set for texure-based tiles, set for model-based tiles with wealth textures, not set for TE tiles 0x04000000 = set for texure-based tiles, set for model-based tiles with wealth textures, not set for TE tiles 0x08000000 = set for model-based network tiles and TE tiles, not set for purely texture-based tiles 0x10000000 = network fully constructed (for TE tiles: set if fully connected to network) 0x40000000 = retaining wall/pillar
Appendix 2.9 - Retaining wall textures
0x00BB0000 - retaining wall 0x00BB0200 - railing 0x08080000 - pillar 0x0912220E - concrete
Network Subfile 2 (CA16374F)
This subfile contains network tiles related to the subway network and is similar to the Pipe Occupant Subfile.
Network Subfile 2 Structure
List of records of the form:
Network Subfile 2 Body
DWORD Record Size DWORD CRC DWORD Memory WORD Version Major (0x0002) WORD Version Minor (0x0003) WORD Version ? (0x0008) WORD Version ? (0x0004) WORD Zot Bytes (Always 0x0000) BYTE 0x00 BYTE Appearance Flag (Always 0x05) (See Appendix 2.2 for more information) DWORD 0xC772BF98 (always the same) BYTE Min Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Min Tract Z Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract Z Coordinate (normally between 0x40 and 0x7F) WORD X Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) WORD Z Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) DWORD Count of Properties (I've only seen 0x00000000) SGPROP SaveGame Properties, repeated Count times (See Appendix 2.1 for more information) DWORD Group ID (always 0x00000000) DWORD Type ID (always 0x00000000) DWORD Instance ID (always 0x00000000) BYTE Unknown (Always 0x05) FLOAT32 Unknown (Normally 0, -1 or 1) FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 0, -1 or 1) FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 1) FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 0, -1 or 1) FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 0, -1 or 1) FLOAT32 Xmax FLOAT32 Ymax FLOAT32 Zmax FLOAT32 Xmin FLOAT32 Ymin FLOAT32 Zmin FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 0) DWORD Unknown (Always 0xFF000000) FLOAT32 X Coordinate FLOAT32 Y Coordinate FLOAT32 Z Coordinate FLOAT32 Unknown (Normally 0) FLOAT32 Unknown (Normally 1) DWORD Unknown (Always 0xFF000000) FLOAT32 X Coordinate FLOAT32 Y Coordinate FLOAT32 Z Coordinate FLOAT32 Unknown (Normally 1) FLOAT32 Unknown (Normally 1) DWORD Unknown (Always 0xFF000000) FLOAT32 X Coordinate FLOAT32 Y Coordinate FLOAT32 Z Coordinate FLOAT32 Unknown (Normally 1) FLOAT32 Unknown (Normally 0) DWORD Unknown (Always 0xFF000000) DWORD TextureID / PathID BYTES×5 Unknown (Small values) BYTE Orientation (See Appendix 2.3 for more information) BYTES×3 Unknown (Small values) BYTE Network Type (See Appendix 2.4 for more information) BYTE Connection, West (See Appendix 2.5 for more information) BYTE Connection, North (See Appendix 2.5 for more information) BYTE Connection, East (See Appendix 2.5 for more information) BYTE Connection, South (See Appendix 2.5 for more information) BYTES×4 Unknown (Small values) FLOAT32 Xmin FLOAT32 Xmax FLOAT32 Ymin FLOAT32 Ymax FLOAT32 Zmin FLOAT32 Zmax BYTE Unknown (Always 128) BYTE Unknown (Always 32) BYTE Unknown (Always 0) BYTE Unknown (Seen 16-21) DWORD×4 Unknown (All 0) DWORD Demolishing costs DWORD Unknown (0x00000000) WORD Unknown (0x0000) FLOAT32 Unknown (Normally 1) DWORD Number of extra blocks (0, 1, 2 or 3) # Below follow 5 arrays defining the sides of the hole. If an array is empty, there is # no texture to be rendered at that side (typically for straight sections). Order is # west, north, east, south, bottom. DWORD Count (Either 0 or 4) 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping (normally 0, 0.75 or 1) 4 x BYTE (r, g, b, a) values indicating a color (either #ffffffff or #ffffff80). DWORD Count (Either 0 or 4) 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping (normally 0, 0.75 or 1) 4 x BYTE (r, g, b, a) values indicating a color (either #ffffffff or #ffffff80). DWORD Count (Either 0 or 4) 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping (normally 0, 0.75 or 1) 4 x BYTE (r, g, b, a) values indicating a color (either #ffffffff or #ffffff80). DWORD Count (Either 0 or 4) 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping (normally 0, 0.75 or 1) 4 x BYTE (r, g, b, a) values indicating a color (either #ffffffff or #ffffff80). DWORD Count (Either 0 or 4) 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping (normally 0, 0.75 or 1) 4 x BYTE (r, g, b, a) values indicating a color (either #ffffffff or #ffffff80). DWORD Unknown (Always 0x00000000) # Next follow 16 floats, representing the values of the transformation matrix for the model # | a b c d | # | d e f g | # | h i j k | # | l m n o | # d, g and k are the translation components and are set to the position *in the city*. 16 x FLOAT32 DWORD X Tile DWORD Z Tile BOOLEAN Unknown (Always 0) BOOLEAN Unknown (Either 0 or 1, false or true) BOOLEAN Unknown (Either 0 or 1, false or true) FLOAT32 Y Coordinate FLOAT32 Y Coordinate FLOAT32 Y Coordinate FLOAT32 Y Coordinate FLOAT32 Y Coordinate DWORD 0xCA16374F (Subfile ID) DWORD 0x00000000 (always the same)
Prebuilt Network Subfile (0x49c1a034)
The prebuilt network subfile contains all model-based network tiles with a prefabricated model, such as elevated highways and monorail.
Structure
List of records of the form:
DWORD Size DWORD CRC DWORD Memory WORD Major version (0x0004) WORD Minor version (0x0008) BYTE Zot (0x04) DWORD Unknown (always 0x000000) BYTE Appearance flag (0x05) DWORD Unknown (always 0xc772bf98) BYTE Min Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Min Tract Z Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract X Coordinate (normally between 0x40 and 0x7F) BYTE Max Tract Z Coordinate (normally between 0x40 and 0x7F) WORD X Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) WORD Z Tract Size (power of 2) (only seen 0x0002 ... 2² = 4 tiles) DWORD Count of Properties SGPROP SaveGame Properties, repeated Count times DWORD Group ID of Network Model Exemplar (see Appendix 4.1) DWORD Type ID of Network Model Exemplar (0x6534284a) DWORD Instance ID of Network Model Exemplar BYTE Unknown Flag (0 or 1) FLOAT32 X Coordinate FLOAT32 Y Coordinate FLOAT32 Z Coordinate # Next follows 4 times a data structure that contains information for # drawing a texture. 3 x FLOAT32 (x, y, z) coordinates of the vertex 2 x FLOAT32 (u, v) coordinates for texture mapping 4 x BYTE (r, g, b, a) values indicating a color (always #dedbddff). DWORD TextureID / PathID BYTE Wealth texture (See Appendix 2.6) DWORD Base texture (See Appendix 2.7) BYTE Orientation BYTES×2 Unknown (Small values) Byte Flag for crossings (1 for crossings of two networks, 0 for single network) BYTE Network Type (See Appendix 2.4 for more information) BYTE Connection, West (See Appendix 2.5 for more information) BYTE Connection, North (See Appendix 2.5 for more information) BYTE Connection, East (See Appendix 2.5 for more information) BYTE Connection, South (See Appendix 2.5 for more information) DWORD Number of blocks for retaining walls (always 0 for model-based network tiles) DWORD Retaining wall texture IID (See Appendix 2.9) # Followed by three vertex blocks of the form: Float32×5 (x, y, z, u, v) coordinates BYTE×4 (r, g, b, a) color FLOAT32 Xmin FLOAT32 Xmax FLOAT32 Ymin FLOAT32 Ymax FLOAT32 Zmin FLOAT32 Zmax DWORD Construction states (See Appendix 2.8) DWORD×4 Unknown (apparently always 0x00000000) BYTE Demolishing costs DWORD×6 Unknown (apparently always 0x00000000) DWORD pillar ID (if non-zero, it is followed by a block): FLOAT32 pillar rotation FLOAT32 pillar offset X FLOAT32 pillar offset Y FLOAT32 pillar offset Z
Appendix 4.1 - Network Model Exemplars
For a list of Group IDs, see Model Exemplar.
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