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Rework the overly weird vine growth algorithm

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This commit is contained in:
Wuzzy 2018-01-23 06:40:07 +01:00
parent 0405b2aa2c
commit 647524f503
1 changed files with 45 additions and 52 deletions
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97
mods/ITEMS/mcl_core/functions.lua
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@ -942,75 +942,68 @@ minetest.register_abm({
return
end
local neighbor_offsets = {
{ x=1, y=0, z=0 },
{ x=-1, y=0, z=0 },
{ x=0, y=0, z=1 },
{ x=0, y=0, z=-1 },
}
-- Add vines below pos (if empty)
local spread_down = function(pos, node)
local down = vector.add(pos, {x=0, y=-1, z=0})
if minetest.get_node(down).name == "air" then
minetest.add_node(down, {name = "mcl_core:vine", param2 = node.param2})
end
end
-- Add vines above pos if it is backed up
local spread_up = function(pos, node)
local up = vector.add(pos, {x=0, y=1, z=0})
if minetest.get_node(up).name == "air" then
local backup_dir = minetest.facedir_to_dir(node.param2)
local backup = vector.add(up, backup_dir)
local backupnodename = minetest.get_node(backup).name
-- Check if the block above is supported
if mcl_core.supports_vines(backupnodename) then
minetest.add_node(up, {name = "mcl_core:vine", param2 = node.param2})
local spread_down = function(origin, target, dir, node)
if math.random(1, 2) == 1 then
if minetest.get_node(target).name == "air" then
minetest.add_node(target, {name = "mcl_core:vine", param2 = node.param2})
end
end
end
-- Try to spread vines from the 4 horizontal neighbors
local spread_neighbors = function(pos, node, spread_dir)
for n=1, #neighbor_offsets do
if math.random(1,2) == 1 then
local neighbor = vector.add(pos, neighbor_offsets[n])
local neighbornode = minetest.get_node(neighbor)
if neighbornode.name == "mcl_core:vine" then
if spread_dir == "up" then
spread_up(neighbor, neighbornode)
elseif spread_dir == "down" then
spread_down(neighbor, neighbornode)
-- Add vines above pos if it is backed up
local spread_up = function(origin, target, dir, node)
local vines_in_area = minetest.find_nodes_in_area({x=origin.x-4, y=origin.y-1, z=origin.z-4}, {x=origin.x+4, y=origin.y+1, z=origin.z+4}, "mcl_core:vine")
-- Less then 4 vines blocks around the ticked vines block (remember the ticked block is counted by above function as well)
if #vines_in_area < 5 then
if math.random(1, 2) == 1 then
if minetest.get_node(target).name == "air" then
local backup_dir = minetest.wallmounted_to_dir(node.param2)
local backup = vector.subtract(target, backup_dir)
local backupnodename = minetest.get_node(backup).name
-- Check if the block above is supported
if mcl_core.supports_vines(backupnodename) then
minetest.add_node(target, {name = "mcl_core:vine", param2 = node.param2})
end
end
end
end
end
-- Spread down
local down = {x=pos.x, y=pos.y-1, z=pos.z}
local down_node = minetest.get_node(down)
if down_node.name == "air" then
spread_neighbors(pos, node, "down")
elseif down_node.name == "mcl_core:vine" then
spread_neighbors(down, down_node, "down")
end
-- Spread up
local up = {x=pos.x, y=pos.y+1, z=pos.z}
local up_node = minetest.get_node(up)
if up_node.name == "air" then
local vines_in_area = minetest.find_nodes_in_area({x=pos.x-4, y=pos.y-1, z=pos.z-4}, {x=pos.x+4, y=pos.y+1, z=pos.z+4}, "mcl_core:vine")
local spread_horizontal = function(origin, target, dir, node)
local vines_in_area = minetest.find_nodes_in_area({x=origin.x-4, y=origin.y-1, z=origin.z-4}, {x=origin.x+4, y=origin.y+1, z=origin.z+4}, "mcl_core:vine")
-- Less then 4 vines blocks around the ticked vines block (remember the ticked block is counted by above function as well)
if #vines_in_area < 5 then
spread_neighbors(pos, node, "up")
-- Spread horizontally
local backup_dir = minetest.wallmounted_to_dir(node.param2)
if not vector.equals(backup_dir, dir) then
local target_node = minetest.get_node(target)
if target_node.name == "air" then
local backup = vector.add(target, backup_dir)
local backupnodename = minetest.get_node(backup).name
if mcl_core.supports_vines(backupnodename) then
minetest.add_node(target, {name = "mcl_core:vine", param2 = node.param2})
end
end
end
end
end
-- TODO: Spread horizontally
local directions = {
{ { x= 1, y= 0, z= 0 }, spread_horizontal },
{ { x=-1, y= 0, z= 0 }, spread_horizontal },
{ { x= 0, y= 1, z= 0 }, spread_up },
{ { x= 0, y=-1, z= 0 }, spread_down },
{ { x= 0, y= 0, z= 1 }, spread_horizontal },
{ { x= 0, y= 0, z=-1 }, spread_horizontal },
}
local d = math.random(1, #directions)
local dir = directions[d][1]
local spread = directions[d][2]
spread(pos, vector.add(pos, dir), dir, node)
end
})