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