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Register.lua: Throw error if node 'light_source' > core.LIGHT_MAX

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Add 'core.LIGHT_MAX = 14' to builtin/game/constants.lua with the intention
to replace misplaced 'default.LIGHT_MAX = 14' in Minetest Game.
Add comment in light.h requiring the constant be changed in both places.
Add lighting bug warning to note in lua_api.txt.
There are hundreds of mod uses of 15 which causes a lighting bug.
This commit is contained in:
paramat 2016-09-15 22:40:19 +01:00
parent 297546af3d
commit 3aefa5d3ce
4 changed files with 16 additions and 3 deletions
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5
doc/lua_api.txt
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@ -3664,7 +3664,10 @@ Definition tables
^ Don't forget to use "leveled" type nodebox. ]]
liquid_range = 8, -- number of flowing nodes around source (max. 8)
drowning = 0, -- Player will take this amount of damage if no bubbles are left
light_source = 0, -- Amount of light emitted by node (max. 14)
light_source = 0, --[[
^ Amount of light emitted by node.
^ To set the maximum (currently 14), use the value 'minetest.LIGHT_MAX'.
^ A value outside the range 0 to minetest.LIGHT_MAX causes undefined behavior.]]
damage_per_second = 0, -- If player is inside node, this damage is caused
node_box = {type="regular"}, -- See "Node boxes"
connects_to = nodenames, --[[