VariationalAction2/Objects

Variational Action 2 Variables for Objects

Variational Action 2 Variables for Objects

||Variable|Size|Content

40|D|Relative position, like Industry Tile var43

41|W|Tile information, see below

42|D|Construction date from year 0

43|W|Animation counter, see below

44|B|Object founder information

45|D|Get town zone and Manhattan distance of closest town

46|D|Get square of Euclidian distance of closest town

60|W|Get object type at offset

61|B|Get random bits at offset

62|D|Land info of nearby tiles

63|W|Animation counter of nearby tile

64|D|Count of object, distance of closest instance||

Tile information (41)

The return value has the format of ss0t where t is the terrain type which the tile is on, same values as canal var81.

As of TTDPatch r2088, ss contains the slope data of the tile, same format as for industrytile var60. The meaning of the individual bits is:

||Bit|Meaning

0|West corner is above the lowest

1|South corner is above the lowest

2|East corner is above the lowest

3|North corner is above the lowest

4|The tile is a steep slope (*)||

(*) - Currently, objects are not allowed on steep slopes so this should be ignored for now.

Animation Counter (43)

The return value has the format of ccaa, where c is the colour of the object, a is the animation counter (note that action0, property 10, bit 6 must be set for this to work).

Object founder information (44)

This byte contains the ID of the company that funded the object, or 10h if the object was placed in the scenario editor.

Get town zone and Manhattan distance of closest town (45)

Like industry var65 but instead of an offset the current tile is used.

Get square of Euclidian distance of closest town (46)

Like industry var66 but instead of an offset the current tile is used.

Get object type at offset (60)

The parameter of this variable is an offset from the current tile. The low nibble contains the signed X offset (that is 0h=0, 1h=+1 ... 7h=+7, 8h=-8, 9h=-7 ... Fh=-1), the high nibble contains the Y offset. Therefore the parameter 00h accesses the current tile itself. The high word of the return value is currently reserved, and the low word can be:

   * 00xxh if the tile is an object tile and was defined in the current GRF with ID xx.

   * FFFEh if the tile is an object tile that was defined in another GRF file or it's a default object.

   * FFFFh if the tile isn't an object tile.

Get random bits at offset (61)

Returns the same values as industry var61. The offset it from the current tile and is signed.

Land info of nearby tiles (62)

Returns the same values as industry tile var60. The offset it from the current tile and is signed.

Animation counter of nearby tile (63)

Returns the var 43 of another tile given by the signed offset.

Count of object, distance of closest instance (64)

Returns the same values as industry var67. The distance is from the current tile.