forked from mtcontrib/Minetest-WorldEdit
104 lines
2.7 KiB
Lua
Executable File
104 lines
2.7 KiB
Lua
Executable File
worldedit = rawget(_G, "worldedit") or {}
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local minetest = minetest --local copy of global
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local get_pointed = function(pos, nearest, distance)
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if distance > 100 then
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return false
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end
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--check for collision with node
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local nodename = minetest.get_node(pos).name
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if nodename ~= "air"
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and nodename ~= "default:water_source"
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and nodename ~= "default:water_flowing" then
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if nodename ~= "ignore" then
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return nearest
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end
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return false
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end
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end
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local use = function(itemstack, user, pointed_thing)
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if pointed_thing.type == "nothing" then --pointing at nothing
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local placepos = worldedit.raytrace(user:getpos(), user:get_look_dir(), get_pointed)
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if placepos then --extended reach
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pointed_thing.type = "node"
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pointed_thing.under = nil --wip
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pointed_thing.above = nil --wip
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end
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end
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return minetest.item_place_node(itemstack, user, pointed_thing)
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end
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--
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worldedit.raytrace = function(pos, dir, callback)
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local base = {x=math.floor(pos.x), y=math.floor(pos.y), z=math.floor(pos.z)}
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local stepx, stepy, stepz = 0, 0, 0
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local componentx, componenty, componentz = 0, 0, 0
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local intersectx, intersecty, intersectz = 0, 0, 0
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if dir.x == 0 then
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intersectx = math.huge
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elseif dir.x > 0 then
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stepx = 1
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componentx = 1 / dir.x
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intersectx = ((base.x - pos.x) + 1) * componentx
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else
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stepx = -1
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componentx = 1 / -dir.x
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intersectx = (pos.x - base.x) * componentx
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end
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if dir.y == 0 then
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intersecty = math.huge
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elseif dir.y > 0 then
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stepy = 1
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componenty = 1 / dir.y
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intersecty = ((base.y - pos.y) + 1) * componenty
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else
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stepy = -1
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componenty = 1 / -dir.y
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intersecty = (pos.y - base.y) * componenty
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end
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if dir.z == 0 then
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intersectz = math.huge
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elseif dir.z > 0 then
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stepz = 1
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componentz = 1 / dir.z
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intersectz = ((base.z - pos.z) + 1) * componentz
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else
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stepz = -1
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componentz = 1 / -dir.z
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intersectz = (pos.z - base.z) * componentz
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end
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local distance = 0
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local nearest = {x=base.x, y=base.y, z=base.z}
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while true do
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local values = {callback(base, nearest, distance)}
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if #values > 0 then
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return unpack(values)
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end
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nearest.x, nearest.y, nearest.z = base.x, base.y, base.z
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if intersectx < intersecty then
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if intersectx < intersectz then
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base.x = base.x + stepx
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distance = intersectx
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intersectx = intersectx + componentx
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else
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base.z = base.z + stepz
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distance = intersectz
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intersectz = intersectz + componentz
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end
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elseif intersecty < intersectz then
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base.y = base.y + stepy
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distance = intersecty
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intersecty = intersecty + componenty
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else
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base.z = base.z + stepz
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distance = intersectz
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intersectz = intersectz + componentz
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end
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end
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end
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