OpenTTD Landscape Internals

Landscape

Nine attributes hold the information about a tile. This can be seen in the Landscape document. This page tries to give an overview of used and free bits of the array so you can quickly see what is used and what is not.

O - bit is free
X - bit is used
P - bit is used by patch feature
- bit of attribute is abused for different purposes, i.e. other bits define the actual meaning.
~ - bit is accessed, but does not really have a meaning (e.g. owner of clear land is always OWNER_NONE)

type - 8 bits in size, tile class (bits 4..7), bridge (bits 2..3) tropic zone (bits 0..1, only valid in tropic climate)
height - 8 bits in size, stores tile height
m1 - 8 bits in size, used to identify the owner of that tile (eg piece of rail, bridge, etc.)
m2 - 16 bits in size, used to identify the index of the given tile (object) in the (object-)array
m3 - 8 bits in size, is used for general storage
m4 - 8 bits in size, is used for general storage
m5 - 8 bits in size, is used for general storage
m6 - 8 bits in size, is used for general storage
m7 - 8 bits in size, is used for general storage
m8 - 16 bits in size, is used for general storage

class		type (8)	height (8)	m1 (8)	m2 (16)	m3 (8)	m4 (8)	m5 (8)	m6 (8)	m7 (8)	m8 (16)
bits		7654 3210	7654 3210	7654 3210	FEDC BA98 7654 3210	7654 3210	7654 3210	7654 3210	7654 3210	7654 3210	FEDC BA98 7654 3210
0	ground	XXXX XXXX	XXXX XXXX	OOO~ ~~~~	OOOO OOOO OOOO OOOO	XXXX OOOO	XXXX XXOO	XXXX XXXX	OOOX XXOO	OOOO OOOO	OOOO OOOO OOOO OOOO
0	farmland	-inherit-	-inherit-	-inherit-	XXXX XXXX XXXX XXXX	XXXX XXXX	-inherit-	-inherit-	OOOX XXOO	OOOO OOOO	OOOO OOOO OOOO OOOO
1	rail	XXXX XXXX	XXXX XXXX	XOOX XXXX	OOOO XXXX OOOO OOOO	OOOO OOOO	OOOO XXXX	XXXX XXXX	OOOO OOOO	OOOO OOOO	OOOO PPPP PPXX XXXX
	rail with signals	-inherit-	-inherit-	-inherit-	OOOP XXXX XXXX XXXX	XXXX OOOO	XXXX XXXX	-inherit-	OOOO OOOO	OOOO OOOO	-inherit-
	depot	-inherit-	-inherit-	-inherit-	XXXX XXXX XXXX XXXX	-inherit-	OOOO XXXX	XXOX OOXX	OOOO OOOO	OOOO OOOO	OOOO OOOO OOXX XXXX
2	road	XXXX XXXX	XXXX XXXX	OOOX XXXX	XXXX XXXX XXXX XXXX	XXXX XXXX	OOXX XXXX	XXXX XXXX	OOXX XOOO	OOXO XXXX	OPPP XXXX XXOO OOOO
	level crossing	-inherit-	-inherit-	OOOX XXXX	-inherit-	XXXX OOOO	OOOO OOOO	XXXX OOPX	OOXX XOOO	OOXX XXXX	OPPP XXXX XXXX XXXX
	road depot	-inherit-	-inherit-	OOOX XXXX	-inherit-	XXXX OOOO	-inherit-	XXOO OOXX	OOOO OOOO	OOXO XXXX	-inherit-
3	house	XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX XXXX XXXX	XXO~ ~~XX	XXXX XXXX	XXXX XXXX	XXXX XXOO	XXXX XXXX	OOOO OOOO OOOO OOOO
4	trees	XXXX XXXX	XXXX XXXX	OXX~ ~~~~	OOOO OOOX XXXX XXXX	~~XX XXXX	OOOO OOOO	XXOO OXXX	OOOO OOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
5	rail station	XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX XXXX XXXX	XXXX OOOO	XXXX XXXX	XXXX XXXX	OOXX XXOO	XXXX XXXX	OOOO OOOO OOXX XXXX
	rail waypoint	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-	-inherit-
	road stop	-inherit-	-inherit-	OXXX XXXX	-inherit-	XXXX OOPP	OOXX XXXX	~~~~ ~XXX	OOXX XOOO	OOOX XXXX	OPPP XXXX XXOO OOOO
	dock	-inherit-	-inherit-	-inherit-	-inherit-	OOOO OOOO	OOOO OOOO	~~~~ ~XXX	OOXX XOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
	airport	-inherit-	-inherit-	-inherit-	-inherit-	XXXX OOOO	OOOO OOOO	XXXX XXXX	OOXX XOOO	XXXX XXXX	OOOO OOOO OOOO OOOO
	buoy	-inherit-	-inherit-	-inherit-	-inherit-	OOOO OOOO	OOOO OOOO	~~~~ ~~~~	OOXX XOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
	oilrig	-inherit-	-inherit-	-inherit-	-inherit-	OOOO OOOO	OOOO OOOO	~~~~ ~~~~	OOXX XOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
6	sea, shore	XXXX XXXX	XXXX XXXX	XXXX XXXX	OOOO OOOO OOOO OOOO	OOOO OOOO	OOOO OOOO	X~~X XXXX	OOOO OOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
	canal, river	-inherit-	-inherit-	-inherit-	OOOO OOOO OOOO OOOO	OOOO OOOO	XXXX XXXX	-inherit-	OOOO OOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
	shipdepot	-inherit-	-inherit-	-inherit-	XXXX XXXX XXXX XXXX	OOOO OOOO	OOOO OOOO	-inherit-	OOOO OOOO	OOOO OOOO	OOOO OOOO OOOO OOOO
8	industry	XXXX XXXX	XXXX XXXX	XXXO XXXX	XXXX XXXX XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX	OOXX XXOO	XXXX XXXX	OOOO OOOO OOOO OOOO
9	tunnel entrance	XXXX XXXX	XXXX XXXX	XOOX XXXX	PPPP PPPP PPPP PPPP	XXXX OOOO	OOXX XXXX	XOOX XXXX	PPOO OOPP	PPXX XXXX	OPPP XXXX XXXX XXXX
9	bridge ramp	-inherit-	-inherit-	-inherit-	PPPP PPPP PPPP PPPP	-inherit-	OOPP PPPP	-inherit-	PPXX XXPP	-inherit-	OPPP PPPP PPXX XXXX
A	objects	XXXX XXXX	XXXX XXXX	OXXX XXXX	XXXX XXXX XXXX XXXX	XXXX XXXX	OOOO OOOO	XXXX XXXX	OOOO OOOO	XXXX XXXX	OOOO OOOO OOOO OOOO