60 lines
1.9 KiB
Lua
60 lines
1.9 KiB
Lua
local wea_c = worldeditadditions_core
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local Vector3 = wea_c.Vector3
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--- Raycasts to find a node in the direction the given player is looking.
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-- @param player Player The player object to raycast from.
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-- @param maxdist number The maximum distance to raycast.
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-- @param skip_liquid bool Whether to skip liquids when raycasting.
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-- @return position, number nil if nothing was found (or unloaded chunks were hit), or the position as an {x, y, z} table and the node id if something was found.
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function wea_c.raycast(player, maxdist, skip_liquid)
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if maxdist == nil then maxdist = 100 end
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if skip_liquid == nil then skip_liquid = false end
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local look_dir = Vector3.clone(player:get_look_dir())
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local node_id_ignore = minetest.get_content_id("ignore")
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local cur_pos
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local player_pos = player:get_pos()
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player_pos.y = player_pos.y + 1.5 -- Calculate from the eye position
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local divisor = 5
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for i = 1, maxdist do
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local j = i / divisor
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cur_pos = (look_dir * j) + player_pos
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local node_pos = cur_pos:round()
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-- Don't bother if this is the same position we were looking at before
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if not (node_pos.x == math.floor(0.5+look_dir.x*(j-divisor))
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and node_pos.y == math.floor(0.5+look_dir.y*(j-divisor))
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and node_pos.z == math.floor(0.5+look_dir.z*(j-divisor))) then
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local found_node = false
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local node = minetest.get_node_or_nil(node_pos)
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if node ~= nil then
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local node_id = minetest.get_content_id(node.name)
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local is_air = wea_c.is_airlike(node_id)
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-- ignore = unloaded chunks, as far as I can tell
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if node_id == node_id_ignore then
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return nil
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end
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if is_air == false then
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if skip_liquid == false then
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return node_pos, node_id
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else
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local is_liquid = wea_c.is_liquidlike(node_id)
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if is_liquid == false then
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return node_pos, node_id
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end
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end
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end
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end
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end
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end
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return nil
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end
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