Cull is one of the major IPL sections used in plaintext map placement files. It is used to create zones with different behaviour like mirrors or fixed camera positions just as it is able to influence the environment. For example it is able to disable rain in certain areas.
GTA III / Vice City
Cull zones in the first 2 parts of the GTA 3D series are built by a box which is controlled by various flags.
CenterX, CenterY, CenterZ, LowerLeftX, LowerLeftY, LowerLeftZ, UpperRightX, UpperRightY, UpperRightZ, Flags, Unknown
| Identifier
|
Description
|
| CenterX, CenterY, CenterZ |
A point which defines the center of the box in real world coordinates
|
| LowerLeftX, LowerLeftY, LowerLeftZ |
A point which corresponds to the lower left corner of the box.
|
| UpperRightX, UpperRightY, UpperRightZ |
A point which corresponds to the upper right corner of the box.
|
| Flags |
The behaviour of the cull zone – see below.
|
| Unknown |
Allways 0
|
Flags
Flags are numbers which are build out of a collection of numbers formed by the power of 2-numbers lower than 231. Some are defining various behaviours of the zone. They can be combined by simply adding one lag value to another.
| Flag
|
Binary
|
Description
|
| 1 |
0000 0001 |
Camera close in into player using closest third-person view camera mode, does not close in if in first person or cinematic mode, camera mode cannot be changed while in the zone
|
| 2 |
0000 0010 |
camera remotely placed outside the zone, no control of camera, camera mode cannot be changed while in the zone
|
| 4 |
0000 0000 0000 0100 |
Unknown
|
| 8 |
0000 0000 0000 1000 |
Rain-free, police helicopter-free zone
|
| 4096 |
0001 0000 0000 0000 |
5-star military zone
|
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