OpenTTD Landscape Internals

Landscape

Six 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
- 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_height - 8 bits in size, stores tile height (lower 4 bits) and tile class (upper 4 bits)
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, special meaning : lower 2 bits only valid in tropic climate, upper 2 bits for bridges
m7 - 8 bits in size, is used for general storage

class		type_height (8)	m1 (8)	m2 (16)	m3 (8)	m4 (8)	m5 (8)	m6 (8)	m7 (8)
bits		7654 3210	7654 3210	FEDC BA98 7654 3210	7654 3210	7654 3210	7654 3210	7654 3210	7654 3210
0	ground	XXXX XXXX	~~~~ ~~~~	OOOO OOOO OOOO OOOO	OOOO OOOO	XXXX XXOO	XXXX XXXX	XXOO OOXX	OOOO OOOO
0	farmland	-inherit-	~~~~ ~~~~	XXXX XXXX XXXX XXXX	OOOO XXXX	-inherit-	-inherit-	XXOO OOXX	OOOO OOOO
1	rail	XXXX XXXX	~~~X XXXX	OOOO OOOO OOOO OOOO	OOOO ~~XX	OOOO XXXX	XXXX XXXX	XXOO OOXX	OOOO OOOO
	rail with signals	-inherit-	-inherit-	OOOO OOOO OXXX OXXX	XXXX ~~XX	XXXX XXXX	-inherit-	XXOO OOXX	OOOO OOOO
	depot	-inherit-	-inherit-	OOOO OOOO OOOO OOOO	OOOO ~~XX	OOOO XXXX	XXOO OOXX	XXOO OOXX	OOOO OOOO
	waypoint	-inherit-	-inherit-	XXXX XXXX XXXX XXXX	OOOO ~~XX	OOOO XXXX	XXOO OOOX	XXOO OOXX	OOOO OOOO
2	road	XXXX XXXX	~~~X XXXX	XXXX XXXX XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX
	level crossing	-inherit-	-inherit-	-inherit-	XXXX ~~XX	OXXX XXXX	XXOO XXXX	XXOO OOXX	-inherit-
	road depot	-inherit-	-inherit-	OOOO OOOO OOOO OOOO	XOOO OOOO	OOOO OOOO	XXOO OOXX	XXOO OOXX	XXXO OOOO
3	house	XXXX XXXX	XXXX XXXX	XXXX XXXX XXXX XXXX	XXO~ ~~XX	XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX
4	trees	XXXX XXXX	~~~~ ~~~~	OOOO OOOO XXXX XXXX	~~XX XXXX	XXXX XXOO	XXOO OXXX	OOOO OOXX	OOOO OOOO
5	rail station	XXXX XXXX	~~~X XXXX	XXXX XXXX XXXX XXXX	XXXX ~~XX	XXXX XXXX	XXXX XXXX	OOXX XOXX	OOOO OOOO
	road stop	-inherit-	-inherit-	-inherit-	OOOO OXXX	~~~~ ~~~~	~~~~ ~XXX	OOXX XXXX	OOOO OOOO
	dock	-inherit-	-inherit-	-inherit-	OOOO OOXX	~~~~ ~~~~	~~~~ ~XXX	OOXX XOXX	OOOO OOOO
	airport	-inherit-	-inherit-	-inherit-	OOOO OOOO	~~~~ ~~~~	XXXX XXXX	OOXX XOXX	OOOO OOOO
	buoy	-inherit-	-inherit-	-inherit-	OOOO OOXX	~~~~ ~~~~	~~~~ ~~~~	OOXX XOXX	OOOO OOOO
	oilrig	-inherit-	-inherit-	-inherit-	OOOO OOOO	~~~~ ~~~~	~~~~ ~~~~	OOXX XOXX	OOOO OOOO
6	sea, shore	XXXX XXXX	~~~X XXXX	OOOO OOOO OOOO OOOO	OOOO OOXX	OOOO OOOO	X~~X XXXX	XXOO OOXX	OOOO OOOO
	canal, river	-inherit-	-inherit-	OOOO OOOO OOOO OOOO	OOOO OOXX	XXXX XXXX	-inherit-	XXOO OOXX	OOOO OOOO
	shipdepot	-inherit-	-inherit-	OOOO OOOO OOOO OOOO	OOOO OOXX	XXXX XXXX	-inherit-	XXOO OOXX	OOOO OOOO
8	industry	XXXX XXXX	XOOO XXXX	XXXX XXXX XXXX XXXX	XXXX XXXX	XXXX XXXX	XXXX XXXX	OOXX XXXX	XXXX XXXX
9	tunnel entrance	XXXX XXXX	~~~X XXXX	OOOO OOOO OOOO OOOO	OOOO ~XXX	XOOO OOOO	XOOO ~XXX	XXOO OOXX	OOOO OOOO
9	bridge ramp	-inherit-	-inherit-	OOOO OOOO XXXX OOOO	OOOO ~XXX	XOOO OOOO	XOOO ~XXX	XXOO OOXX	OOOO OOOO
A	unmovables	XXXX XXXX	~~~X XXXX	OOOO OOOO OOOO OOOO	OOOO OOOO	OOOO OOOO	X~~X XXXX	XXOO OOXX	OOOO OOOO
A	company statue	-inherit-	-inherit-	XXXX XXXX XXXX XXXX	OOOO OOOO	OOOO OOOO	-inherit-	XXOO OOXX	OOOO OOOO