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Initialize facedir and wallmounted tables only once.
This makes the functions a bit faster since they don't have to recreate the tables every invocation, and makes the code more readable. Also, document `wallmounted_to_dir`. The function was implemented but not documented in `lua_api.txt`.
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@ -88,25 +88,26 @@ function core.dir_to_facedir(dir, is6d)
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end
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end
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-- Table of possible dirs
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local facedir_to_dir = {
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{x= 0, y=0, z= 1},
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{x= 1, y=0, z= 0},
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{x= 0, y=0, z=-1},
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{x=-1, y=0, z= 0},
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{x= 0, y=-1, z= 0},
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{x= 0, y=1, z= 0},
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}
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-- Mapping from facedir value to index in facedir_to_dir.
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local facedir_to_dir_map = {
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[0]=1, 2, 3, 4,
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5, 2, 6, 4,
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6, 2, 5, 4,
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1, 5, 3, 6,
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1, 6, 3, 5,
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1, 4, 3, 2,
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}
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function core.facedir_to_dir(facedir)
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--a table of possible dirs
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return ({{x=0, y=0, z=1},
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{x=1, y=0, z=0},
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{x=0, y=0, z=-1},
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{x=-1, y=0, z=0},
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{x=0, y=-1, z=0},
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{x=0, y=1, z=0}})
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--indexed into by a table of correlating facedirs
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[({[0]=1, 2, 3, 4,
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5, 2, 6, 4,
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6, 2, 5, 4,
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1, 5, 3, 6,
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1, 6, 3, 5,
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1, 4, 3, 2})
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--indexed into by the facedir in question
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[facedir]]
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return facedir_to_dir[facedir_to_dir_map[facedir]]
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end
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function core.dir_to_wallmounted(dir)
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@ -131,17 +132,17 @@ function core.dir_to_wallmounted(dir)
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end
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end
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-- table of dirs in wallmounted order
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local wallmounted_to_dir = {
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[0] = {x = 0, y = 1, z = 0},
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{x = 0, y = -1, z = 0},
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{x = 1, y = 0, z = 0},
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{x = -1, y = 0, z = 0},
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{x = 0, y = 0, z = 1},
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{x = 0, y = 0, z = -1},
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}
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function core.wallmounted_to_dir(wallmounted)
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-- table of dirs in wallmounted order
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return ({[0] = {x = 0, y = 1, z = 0},
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{x = 0, y = -1, z = 0},
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{x = 1, y = 0, z = 0},
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{x = -1, y = 0, z = 0},
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{x = 0, y = 0, z = 1},
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{x = 0, y = 0, z = -1}})
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--indexed into by the wallmounted in question
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[wallmounted]
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return wallmounted_to_dir[wallmounted]
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end
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function core.get_node_drops(nodename, toolname)
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@ -2153,6 +2153,8 @@ and `minetest.auth_reload` call the authetification handler.
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* Convert a facedir back into a vector aimed directly out the "back" of a node
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* `minetest.dir_to_wallmounted(dir)`
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* Convert a vector to a wallmounted value, used for `paramtype2="wallmounted"`
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* `minetest.wallmounted_to_dir(wallmounted)`
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* Convert a wallmounted value back into a vector aimed directly out the "back" of a node
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* `minetest.get_node_drops(nodename, toolname)`
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* Returns list of item names.
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* **Note**: This will be removed or modified in a future version.
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