mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-08-20 21:44:06 +02:00
96 lines
3.2 KiB
Lua
96 lines
3.2 KiB
Lua
worldeditadditions.vector = {}
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function worldeditadditions.vector.tostring(v)
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if not v then return "(nil)" end
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return "(" .. v.x ..", " .. v.y ..", " .. v.z ..")"
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end
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-- Calculates the length squared of the given vector.
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-- @param v Vector The vector to operate on
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-- @return number The length of the given vector squared
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function worldeditadditions.vector.lengthsquared(v)
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if not v.y then return v.x*v.x + v.z*v.z end
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return v.x*v.x + v.y*v.y + v.z*v.z
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end
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--- Normalises the given vector such that its length is 1.
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-- Also known as calculating the unit vector.
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-- This method does *not* mutate.
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-- @param v Vector The vector to calculate from.
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-- @return Vector A new normalised vector.
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function worldeditadditions.vector.normalize(v)
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local length = math.sqrt(worldeditadditions.vector.lengthsquared(v))
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if not v.y then return {
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x = v.x / length,
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z = v.z / length
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} end
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return {
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x = v.x / length,
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y = v.y / length,
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z = v.z / length
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}
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end
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--- Rounds the values in a vector down.
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-- Warning: This MUTATES the given vector!
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-- @param v Vector The vector to operate on
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function worldeditadditions.vector.floor(v)
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if v.x then v.x = math.floor(v.x) end
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-- Some vectors are 2d, but on the x / z axes
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if v.y then v.y = math.floor(v.y) end
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-- Some vectors are 2d
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if v.z then v.z = math.floor(v.z) end
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end
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--- Rounds the values in a vector up.
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-- Warning: This MUTATES the given vector!
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-- @param v Vector The vector to operate on
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function worldeditadditions.vector.ceil(v)
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if v.x then v.x = math.ceil(v.x) end
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-- Some vectors are 2d, but on the x / z axes
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if v.y then v.y = math.ceil(v.y) end
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-- Some vectors are 2d
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if v.z then v.z = math.ceil(v.z) end
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end
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--- Determines if the target point is contained within the defined worldedit region.
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-- @param pos1 Vector pos1 of the defined region.
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-- @param pos2 Vector pos2 of the defined region.
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-- @param target Vector The target vector to check.
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-- @return boolean Whether the given target is contained within the defined worldedit region.
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function worldeditadditions.vector.is_contained(pos1, pos2, target)
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local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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return pos1.x >= target.x
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and pos1.y >= target.y
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and pos1.z >= target.z
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and pos2.x <= target.x
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and pos2.y <= target.y
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and pos2.z <= target.z
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end
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--- Expands the defined region to include the given point.
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-- @param pos1 Vector pos1 of the defined region.
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-- @param pos2 Vector pos2 of the defined region.
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-- @param target Vector The target vector to include.
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function worldeditadditions.vector.expand_region(pos1, pos2, target)
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local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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if target.x < pos1.x then pos1.x = target.x end
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if target.y < pos1.y then pos1.y = target.y end
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if target.z < pos1.z then pos1.z = target.z end
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if target.x > pos2.x then pos2.x = target.x end
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if target.y > pos2.y then pos2.y = target.y end
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if target.z > pos2.z then pos2.z = target.z end
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return pos1, pos2
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end
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--- Returns the mean (average) of 2 positions to give you the centre.
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-- @param pos1 Vector pos1 of the defined region.
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-- @param pos2 Vector pos2 of the defined region.
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-- @param target Vector Centre coordinates.
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function worldeditadditions.vector.mean(pos1, pos2)
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return vector.new((pos1.x + pos2.x)/2, (pos1.y + pos2.y)/2, (pos1.z + pos2.z)/2)
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end
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