61 lines
2.4 KiB
Lua
61 lines
2.4 KiB
Lua
-- please keep any non-generic nodeboxe with its node definition
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-- this file should not accumulate any left over nodeboxes
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-- but is meant to host any abstractions or calculations based on nodeboxes
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-- a box is defined as {x1, y1, z1, x2, y2, z2}
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homedecor.box = {
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-- slab starting from -x (after rotation: left)
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slab_x = function(depth) return { -0.5, -0.5, -0.5, -0.5+depth, 0.5, 0.5 } end,
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-- bottom slab (starting from -y) with height optionally shifted upwards
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slab_y = function(height, shift) return { -0.5, -0.5+(shift or 0), -0.5, 0.5, -0.5+height+(shift or 0), 0.5 } end,
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-- slab starting from -z (+z with negative depth)
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slab_z = function(depth, shift)
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-- for consistency with the other functions here, we have to assume that a "z" slab starts from -z and extends by depth,
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-- but since conventionally a lot of nodes place slabs against +z for player convenience, we define
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-- a "negative" depth as a depth extending from the other side, i.e. +z
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local s = shift or 0
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if depth > 0 then
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-- slab starting from -z
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return { -0.5, -0.5, -0.5+s, 0.5, 0.5, -0.5+depth+s }
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else
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-- slab starting from +z (z1=0.5-(-depth))
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return { -0.5, -0.5, 0.5+depth+s, 0.5, 0.5, 0.5+s }
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end
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end,
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bar_y = function(radius) return {-radius, -0.5, -radius, radius, 0.5, radius} end,
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cuboid = function(radius_x, radius_y, radius_z)
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return {-radius_x, -radius_y, -radius_z, radius_x, radius_y, radius_z} end,
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}
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homedecor.nodebox = {
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-- { -0.5, -0.5, -0.5, 0.5, 0.5, 0.5 },
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-- can be used in-place as:
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-- { type="regular" },
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regular = { type="regular" },
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null = { type = "fixed", fixed = { 0, 0, 0, 0, 0, 0 } },
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corner_xz = function(depth_x, depth_z) return {
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type="fixed",
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fixed={
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homedecor.box.slab_x(depth_x),
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homedecor.box.slab_z(depth_z),
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-- { -0.5, -0.5, -0.5, 0.5-depth, 0.5, -0.5+depth } -- slab_x without the overlap, but actually looks a bit worse
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}
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} end,
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}
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local mt = {}
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mt.__index = function(table, key)
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local ref = homedecor.box[key]
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local ref_type = type(ref)
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if ref_type == "function" then
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return function(...)
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return { type = "fixed", fixed = ref(...) }
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end
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elseif ref_type == "table" then
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return { type = "fixed", fixed = ref }
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elseif ref_type == "nil" then
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error(key .. "could not be found among nodebox presets and functions")
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end
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error("unexpected datatype " .. tostring(type(ref)) .. " while looking for " .. key)
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end
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setmetatable(homedecor.nodebox, mt)
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