132 lines
3.7 KiB
Lua
132 lines
3.7 KiB
Lua
-- Used by cave pearls and crystal clusters
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-- These methods simulate "wallmounted" nodes using regular facedir, randomizing the rotation around the wallmounted direction.
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-- Useful for naturalistic objects you want to have look irregular
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df_mapitems.place_against_surface = function(itemstack, placer, pointed_thing)
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-- check if pointing at a node
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if not pointed_thing then
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return itemstack
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end
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if pointed_thing.type ~= "node" then
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return itemstack
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end
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local under_pos = pointed_thing.under
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local above_pos = pointed_thing.above
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local under_node = minetest.get_node(under_pos)
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local above_node = minetest.get_node(above_pos)
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if minetest.is_protected(above_pos, placer:get_player_name()) then
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minetest.record_protection_violation(above_pos, placer:get_player_name())
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return
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end
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local under_name = under_node.name
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local above_name = above_node.name
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local under_def = minetest.registered_nodes[under_name]
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local above_def = minetest.registered_nodes[above_name]
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-- return if any of the nodes is not registered
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if not under_def or not above_def then
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return itemstack
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end
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-- check if you can replace the node above the pointed node
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if not above_def.buildable_to then
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return itemstack
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end
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local dir = vector.subtract(under_pos, above_pos)
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local param2
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if dir.x > 0 then
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--facing +x: 16, 17, 18, 19,
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param2 = 15 + math.random(1,4)
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elseif dir.x < 0 then
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--facing -x: 12, 13, 14, 15
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param2 = 11 + math.random(1,4)
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elseif dir.z > 0 then
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--facing +z: 8, 9, 10, 11
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param2 = 7 + math.random(1,4)
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elseif dir.z < 0 then
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--facing -z: 4, 5, 6, 7
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param2 = 3 + math.random(1,4)
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elseif dir.y > 0 then
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--facing -y: 20, 21, 22, 23 (ceiling)
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param2 = 19 + math.random(1,4)
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else
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--facing +y: 0, 1, 2, 3 (floor)
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param2 = math.random(1,4) - 1
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end
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-- add the node and remove 1 item from the itemstack
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minetest.add_node(above_pos, {name = itemstack:get_name(), param2 = param2})
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if not minetest.is_creative_enabled(placer:get_player_name()) then
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itemstack:take_item()
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end
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return itemstack
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end
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-- Mapgen version of the above
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local add_to_table = function(dest, source)
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for _, val in ipairs(source) do
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table.insert(dest, val)
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end
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end
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local valid_nodes = {} -- cache values
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local is_valid_mounting_node = function(c_node)
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if valid_nodes[c_node] ~= nil then
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return valid_nodes[c_node]
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end
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local def = minetest.registered_nodes[minetest.get_name_from_content_id(c_node)]
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if def ~= nil
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and (def.drawtype == "normal" or def.drawtype == nil)
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and not def.buildable_to
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and not (def.groups and def.groups.falling_node) then
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valid_nodes[c_node] = true
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return true
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end
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valid_nodes[c_node] = false
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return false
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end
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--facing +x: 16, 17, 18, 19,
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--facing -x: 12, 13, 14, 15
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--facing +z: 8, 9, 10, 11
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--facing -z: 4, 5, 6, 7
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--facing -y: 20, 21, 22, 23, (ceiling)
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--facing +y: 0, 1, 2, 3
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local get_valid_facedirs_vm = function(vi, area, data)
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local dirs = {}
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local ystride = area.ystride
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local zstride = area.zstride
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if is_valid_mounting_node(data[vi+1]) then
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add_to_table(dirs, {16, 17, 18, 19})
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end
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if is_valid_mounting_node(data[vi-1]) then
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add_to_table(dirs, {12, 13, 14, 15})
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end
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if is_valid_mounting_node(data[vi-ystride]) then
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add_to_table(dirs, {0, 1, 2, 3})
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end
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if is_valid_mounting_node(data[vi+ystride]) then
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add_to_table(dirs, {20, 21, 22, 23})
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end
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if is_valid_mounting_node(data[vi+zstride]) then
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add_to_table(dirs, {8, 9, 10, 11})
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end
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if is_valid_mounting_node(data[vi-zstride]) then
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add_to_table(dirs, {4, 5, 6, 7})
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end
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return dirs
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end
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df_mapitems.place_against_surface_vm = function(c_node, vi, area, data, data_param2)
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local facedirs = get_valid_facedirs_vm(vi, area, data)
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local count = #facedirs
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if count > 0 then
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data[vi] = c_node
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data_param2[vi] = facedirs[math.random(1, count)]
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end
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end |