59 lines
2.0 KiB
Lua
59 lines
2.0 KiB
Lua
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--[[
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Copyright (c) 2014, Robert 'Bobby' Zenz
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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--]]
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--- Various functions for working with positions.
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posutil = {}
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--- Returns the position above the given position.
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--
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-- @param pos The position.
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-- @param add Optional. The value to add to the y value. Defaults to 1.
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-- @return The position above the given one.
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function posutil.above(pos, add)
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return {
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x = pos.x,
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y = pos.y + (add or 1),
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z = pos.z
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}
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end
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--- Returns the position below the given position.
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--
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-- @param pos The position.
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-- @param subtract Optional. The value to subtract from the y value. Defaults
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-- to 1.
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-- @return The position below the given one.
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function posutil.below(pos, subtract)
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return {
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x = pos.x,
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y = pos.y - (subtract or 1),
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z = pos.z
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}
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end
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