Add mcl_util.trace_node(), rewrite bamboo growth code to fix bone meal growth
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@ -1131,3 +1131,25 @@ if not vector.in_area then
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(pos.z >= min.z) and (pos.z <= max.z)
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end
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end
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-- Traces along a line of nodes vertically to find the next possition that isn't an allowed node
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---@param pos The position to start tracing from
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---@param dir The direction to trace in (1 is up, -1 is down)
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---@param allowed_nodes A table of node names to trace along
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---@param limit The maximum number of steps to make. Defaults to 16 if nil or missing
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---@return Three return values:
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--- the position of the next node that isn't allowed or nil if no such node was found,
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--- the distance from the start where that node was found,
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--- the node table if a node was found
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function mcl_util.trace_nodes(pos, dir, allowed_nodes, limit)
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if not dir or dir == 0 or #allowed_nodes == 0 then return nil, 0, nil end
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limit = limit or 16
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for i = 1,limit do
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pos = vector.offset(pos, 0, dir, 0)
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local node = minetest.get_node(pos)
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if table.indexof(allowed_nodes, node.name) == -1 then return pos, i, node end
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end
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return nil, limit, nil
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end
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@ -94,172 +94,84 @@ end
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--]]
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function mcl_bamboo.grow_bamboo(pos, bonemeal_applied)
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local log = mcl_bamboo.mcl_log
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local node_above = minetest.get_node(vector.offset(pos, 0, 1, 0))
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mcl_bamboo.mcl_log("Grow bamboo called; bonemeal: " .. tostring(bonemeal_applied))
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log("Grow bamboo called; bonemeal: " .. tostring(bonemeal_applied))
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if not bonemeal_applied and mcl_bamboo.is_bamboo(node_above.name) ~= false then
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return false -- short circuit this function if we're trying to grow (std) the bamboo and it's not the top shoot.
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if not bonemeal_applied then
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-- Only allow natural growth at the top of the bamboo
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if mcl_bamboo.is_bamboo(node_above.name) ~= false then return false end
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-- Don't perform natual growth in low light
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if minetest.get_node_light(pos) < 8 then return false end
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end
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if minetest.get_node_light(pos) < 8 then
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-- Determine the location of soil
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local soil_pos
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soil_pos,a,b = mcl_util.trace_nodes(pos, -1, mcl_bamboo.bamboo_index, BAMBOO_MAX_HEIGHT - 1)
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-- No soil found, return false so that bonemeal isn't used
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if not soil_pos then return false end
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log("Grow bamboo; soil found. ")
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-- Find the first bamboo shoot and retrieve data about it
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local first_shoot = vector.offset(soil_pos, 0, 1, 0)
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local first_shoot_meta = minetest.get_meta(first_shoot)
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-- Get or initialize bamboo height
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local height = (first_shoot_meta and first_shoot_meta:get_int("height", -1)) or -1
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if height == -1 then
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height = rand(BAM_MAX_HEIGHT_STPCHK + 1, BAM_MAX_HEIGHT_TOP + 1)
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first_shoot_meta:set_int("height", height)
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end
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log("Grow bamboo; height: " .. height)
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-- Locate the bamboo tip
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local bamboo_tip,actual_height,bamboo_tip_node = mcl_util.trace_nodes(first_shoot, 1, mcl_bamboo.bamboo_index, height - 1)
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log("Current height: "..tostring(actual_height))
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-- Short circuit growth if the bamboo is already finished growing
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if not bamboo_tip or not actual_height or actual_height >= height then
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log("Bamboo is already as large as it can grow")
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return false
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end
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-- variables used in more than one spot.
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local first_shoot
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local chk_pos
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local soil_pos
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local node_name = ""
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local dist = 0
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local node_below
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-- -------------------
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-- Now that we are actually going to add nodes, initialize some more information
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local first_shoot_node_name = minetest.get_node(first_shoot).name
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mcl_bamboo.mcl_log("Grow bamboo; checking for soil: ")
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-- the soil node below the bamboo.
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for py = -1, BAMBOO_SOIL_DIST, -1 do
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chk_pos = vector.offset(pos, 0, py, 0)
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node_name = minetest.get_node(chk_pos).name
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if mcl_bamboo.is_dirt(node_name) then
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soil_pos = chk_pos
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break
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end
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if mcl_bamboo.is_bamboo(node_name) == false then
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break
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end
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end
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-- requires knowing where the soil node is.
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if soil_pos == nil then
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return false -- returning false means don't use up the bonemeal.
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end
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mcl_bamboo.mcl_log("Grow bamboo; soil found. ")
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local grow_amount = rand(1, GROW_DOUBLE_CHANCE)
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grow_amount = rand(1, GROW_DOUBLE_CHANCE)
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grow_amount = rand(1, GROW_DOUBLE_CHANCE) -- because yeah, not truly random, or even a good prng.
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grow_amount = rand(1, GROW_DOUBLE_CHANCE)
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local init_height = rand(BAM_MAX_HEIGHT_STPCHK + 1, BAM_MAX_HEIGHT_TOP + 1)
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mcl_bamboo.mcl_log("Grow bamboo; random height: " .. init_height)
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node_name = ""
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-- update: add randomized max height to first node's meta data.
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first_shoot = vector.offset(soil_pos, 0, 1, 0)
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local meta = minetest.get_meta(first_shoot)
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node_below = minetest.get_node(first_shoot).name
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mcl_bamboo.mcl_log("Grow bamboo; checking height meta ")
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-- check the meta data for the first node, to see how high to make the stalk.
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if not meta then
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-- if no metadata, set the metadata!!!
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meta:set_int("height", init_height)
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end
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local height = meta:get_int("height", -1)
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mcl_bamboo.mcl_log("Grow bamboo; meta-height: " .. height)
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if height <= 10 then
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height = init_height
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meta:set_int("height", init_height)
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end
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mcl_bamboo.mcl_log("Grow bamboo; height: " .. height)
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-- Bonemeal: Grows the bamboo by 1-2 stems. (per the minecraft wiki.)
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-- If applying bonemeal, randomly grow two segments instead of one
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local grow_amount = 1
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if bonemeal_applied then
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-- handle applying bonemeal.
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for py = 1, BAM_MAX_HEIGHT_TOP do
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-- find the top node of bamboo.
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chk_pos = vector.offset(pos, 0, py, 0)
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node_name = minetest.get_node(chk_pos).name
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dist = vector.distance(soil_pos, chk_pos)
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if mcl_bamboo.is_bamboo(node_name) == false or node_name == BAMBOO_ENDCAP_NAME then
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break
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end
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end
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mcl_bamboo.mcl_log("Grow bamboo; dist: " .. dist)
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if node_name == BAMBOO_ENDCAP_NAME then
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-- prevent overgrowth
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return false
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end
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-- check to see if we have a full stalk of bamboo.
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if dist >= height - 1 then
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if dist == height - 1 then
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-- equals top of the stalk before the cap
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if node_name == "air" then
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mcl_bamboo.mcl_log("Grow bamboo; Placing endcap")
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minetest.set_node(vector.offset(chk_pos, 0, 1, 0), { name = BAMBOO_ENDCAP_NAME })
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return true -- returning true means use up the bonemeal.
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else
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return false
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end
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else
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-- okay, we're higher than the end cap, fail out.
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return false -- returning false means don't use up the bonemeal.
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end
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end
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-- and now, the meat of the section... add bamboo to the stalk.
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-- at this point, we should be lower than the generated maximum height. ~ about height -2 or lower.
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if dist <= height - 2 then
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if node_name == "air" then
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-- here we can check to see if we can do up to 2 bamboo shoots onto the stalk
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mcl_bamboo.mcl_log("Grow bamboo; Placing bamboo.")
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minetest.set_node(chk_pos, { name = node_below })
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-- handle growing a second node.
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if grow_amount == 2 then
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chk_pos = vector.offset(chk_pos, 0, 1, 0)
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if minetest.get_node(chk_pos).name == "air" then
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mcl_bamboo.mcl_log("Grow bamboo; OOOH! It's twofer day!")
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minetest.set_node(chk_pos, { name = node_below })
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end
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end
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return true -- exit out with a success. We've added 1-2 nodes, per the wiki.
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end
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local rng = PcgRandom(minetest.hash_node_position(pos) + minetest.get_us_time())
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if rng:next(1, GROW_DOUBLE_CHANGE) == 1 then
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grow_amount = 2
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end
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end
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log("Growing up to "..grow_amount.." segments")
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-- Non-Bonemeal growth.
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for py = 1, BAM_MAX_HEIGHT_TOP do
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-- Find the topmost node above the stalk, and check it for "air"
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chk_pos = vector.offset(pos, 0, py, 0)
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node_below = minetest.get_node(pos).name
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node_name = minetest.get_node(chk_pos).name
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dist = vector.distance(soil_pos, chk_pos)
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if node_name ~= "air" and mcl_bamboo.is_bamboo(node_name) == false then
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break
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-- Perform bamboo growth
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for i = 1,grow_amount do
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-- Check for air to grow into
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local bamboo_tip_node = minetest.get_node(bamboo_tip)
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if not bamboo_tip_node or bamboo_tip_node.name ~= "air" then
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-- Something is blocking growth, stop and signal that use bonemeal has been used if at least on segment has grown
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return i ~= 1
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end
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-- stop growing check. ie, handle endcap placement.
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if dist >= height - 1 then
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local above_node_name = minetest.get_node(vector.offset(chk_pos, 0, 1, 0)).name
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if node_name == "air" and above_node_name == "air" then
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if height - 1 == dist then
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mcl_bamboo.mcl_log("Grow bamboo; Placing endcap")
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minetest.set_node(chk_pos, { name = BAMBOO_ENDCAP_NAME })
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end
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end
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break
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if actual_height + 1 == height then
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-- This is the end cap
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minetest.set_node(bamboo_tip, { name = BAMBOO_ENDCAP_NAME })
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return true
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else
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-- This isn't the end cap, add a bamboo segment
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minetest.set_node(bamboo_tip, { name = first_shoot_node_name })
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actual_height = actual_height + 1
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end
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-- handle regular node placement.
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-- find the air node above the top shoot. place a node. And then, if short enough,
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-- check for second node placement.
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if node_name == "air" then
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mcl_bamboo.mcl_log("Grow bamboo; dist: " .. dist)
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mcl_bamboo.mcl_log("Grow bamboo; Placing bamboo.")
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minetest.set_node(chk_pos, { name = node_below })
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-- handle growing a second node. (1 in 32 chance.)
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if grow_amount == 2 and dist <= height - 2 then
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chk_pos = vector.offset(chk_pos, 0, 1, 0)
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if minetest.get_node(chk_pos).name == "air" then
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mcl_bamboo.mcl_log("Grow bamboo; OOOH! It's twofer day!")
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minetest.set_node(chk_pos, { name = node_below })
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end
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end
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break
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end
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bamboo_tip = vector.offset(bamboo_tip, 0, 1, 0)
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end
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return true
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end
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-- Add Groups function, courtesy of Warr1024.
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