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Biome API: Add decoration flags for underground decorations

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Add "all_floors" and "all_ceilings" flags for simple and schematic
decorations. Decorations are placed on all floor and/or ceiling surfaces.
Decorations are placed before dungeon generation so placement in dungeons
is not possible.

Add 'getSurfaces()' function to mapgen.cpp that returns 2 arrays of y
coordinates for all floor and ceiling surfaces in a specified node column.

Move 'getHeight()' checks into DecoSimple and DecoSchematic. Delete
'getHeight()' functions.
This commit is contained in:
paramat 2017-10-11 01:06:40 +01:00 • committed by paramat
parent a637107a4e
commit 241fe649f7
5 changed files with 197 additions and 79 deletions
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32
doc/lua_api.txt
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@ -4849,12 +4849,22 @@ Definition tables
num_spawn_by = 1,
-- ^ Number of spawn_by nodes that must be surrounding the decoration position to occur.
-- ^ If absent or -1, decorations occur next to any nodes.
flags = "liquid_surface, force_placement",
flags = "liquid_surface, force_placement, all_floors, all_ceilings",
-- ^ Flags for all decoration types.
-- ^ "liquid_surface": Instead of placement on the highest solid surface in
-- ^ a mapchunk column, placement is on the highest liquid surface. Placement
-- ^ is disabled if solid nodes are found above the liquid surface.
-- ^ "force_placement": Nodes other than "air" and "ignore" are replaced by the decoration.
-- ^ "liquid_surface": Instead of placement on the highest solid surface
-- ^ in a mapchunk column, placement is on the highest liquid surface.
-- ^ Placement is disabled if solid nodes are found above the liquid
-- ^ surface.
-- ^ "force_placement": Nodes other than "air" and "ignore" are replaced
-- ^ by the decoration.
-- ^ "all_floors", "all_ceilings": Instead of placement on the highest
-- ^ surface in a mapchunk the decoration is placed on all floor and/or
-- ^ ceiling surfaces, for example in caves.
-- ^ Ceiling decorations act as an inversion of floor decorations so the
-- ^ effect of 'place_offset_y' is inverted.
-- ^ If a single decoration registration has both flags the floor and
-- ^ ceiling decorations will be aligned vertically and may sometimes
-- ^ meet to form a column.
----- Simple-type parameters
decoration = "default:grass",
@ -4873,9 +4883,10 @@ Definition tables
-- ^ Upper limit of the randomly selected param2.
-- ^ If absent, the parameter 'param2' is used as a constant.
place_offset_y = 0,
-- ^ Y offset of the decoration base node relative to the standard
-- ^ base node position for simple decorations.
-- ^ Y offset of the decoration base node relative to the standard base
-- ^ node position.
-- ^ Can be positive or negative. Default is 0.
-- ^ Effect is inverted for "all_ceilings" decorations.
-- ^ Ignored by 'y_min', 'y_max' and 'spawn_by' checks, which always refer
-- ^ to the 'place_on' node.
@ -4908,12 +4919,13 @@ Definition tables
rotation = "90" -- rotate schematic 90 degrees on placement
-- ^ Rotation can be "0", "90", "180", "270", or "random".
place_offset_y = 0,
-- ^ If the flag 'place_center_y' is set this parameter is ignored.
-- ^ Y offset of the schematic base node layer relative to the 'place_on'
-- ^ node.
-- ^ Can be positive or negative. Default is 0.
-- ^ If the flag 'place_center_y' is set this parameter is ignored.
-- ^ If absent or 0 the schematic base node layer will be placed level
-- ^ with the 'place_on' node.
-- ^ Effect is inverted for "all_ceilings" decorations.
-- ^ Ignored by 'y_min', 'y_max' and 'spawn_by' checks, which always refer
-- ^ to the 'place_on' node.
}
### Chat command definition (`register_chatcommand`)