Time cycle

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The timecyc.dat data file contains the most important settings about the game's appearance. Basicly it stores important information like colors and lightning for different hardcoded weather situations for almost each time of day. The settings themselfes are constant and build a cycle around the whole day. So the exact name of the setting is time cycle.

In the Vice City the timecyc.dat file additionally stores settings for different interior appearances. There are 24 of those extra settings in one extra section (internally called "EXTRACOLOURS"). Each game hour represents one constant setting.



File format

A comment in the timecyc.dat file is preceded by a series of slashes ("//"). The game's parser simply ignores comments so that the number of uncommented lines must be a multiple of 24 for GTA III and Vice City (representing one for each ingame hour) and a multiple of 8 for San Andreas (representing 00am, 05am, 06am, 07am, 00pm, 07pm, 08pm and 10pm in the order they appear). Each value of one entry gets interpolated with the previous and the next setting of the current ingame weather.



Data types

The file uses the following different data types directly or indirectly on an abstract level inside structures:

  • INT8/UINT8 - signed/unsigned 8 bit integer (1 byte)
  • INT32/UINT32 - signed/unsigned 32 bit integer (4 byte)
  • FLOAT - single precision floating point number (4 byte)
  • TColor - UINT8[3] (3 byte)

File hierarchy

As mentioned above each setting consists out of a constant number of entries seperated by whitespaces. The following table lists the entries and their descriptions in the order they appear:

GTA III Vice City San Andreas Name Data type Description
X
Static ambience color TColor The color of ambient light on map objects (see IPL).
X
Dynamic ambience color TColor The color of ambient light on dynamicly created objects like pedestriants and vehicles.
X
Static ambience blur color TColor Blurrig color value for static ambience color.
X
Dynamic ambience blur color TColor Blurrig color value for dynamic ambience color.
X
Direct light color TColor The color of direct light on dynamicly created objects like pedestriants and vehicles.
X
Sky top color TColor The color of the top of the skysphere.
X
Sky bottom color TColor The color of the bottom of the skysphere.
X
Sun core color TColor The color of the core sprite of the sun.
X
Sun corona color TColor The color of the corona sprite of the sun.
X
Sun core size FlOAT The size of the core sprite of the sun.
X
Sun corona size FLOAT The size of the corona sprite of the sun.
X
Sprite brightness FLOAT The the brightness of the above mentioned sprites.
X
Shadow intensity INT32 The intensity of the shadows of objects like pedestriants, vehicles or poles.
X
Light shading value INT32 Value used shading algorithm of pedestirants and vehicles.
X
Pole shading value INT32 Shading value for map objects with flag 32768.
X
Far clipping offset FLOAT The distance of the far clipping plane from the camera.
X
Fog start offset FLOAT The range of the distance fog from the camera.
X
Light on ground FLOAT Amount of light on the ground of the sea (?).
X
Lower clouds color TColor Color of the lower clounds.
X
Upper clouds top color TColor Color of the top of the upper clouds.
X
Upper clouds bottom color TColor Color of the bottom of the upper clouds.
X
Blur color TColor The color of trails.
X
Water color TColor Color of the water vertices.
X
Water alpha level UINT8 Alpha level for water vertices.
X
Color correction 1 alpha UINT8 Alpha level for first color correction value.
X
Color correction 1 TColor First color correction value.
X
Color correction 2 alpha UINT8 Alpha level for second color correction value.
X
Color correction 2 TColor Second color correction value.
X
Lower clouds alpha level UINT8 Alpha level for lower clouds.
X
Upper clouds alpha level UINT8 Alpha level for upper clouds.
X
Unused clouds alpha level UINT8 Usually 0.

Tools

External links