mirror of
https://github.com/minetest-mods/digtron.git
synced 2024-11-14 02:53:44 +01:00
eaae4276fc
This is basically working, but still needs revisions to take advantage of the new information being stored in the image data. It should be possible to do all the temporary inventory work directly on the image file so that no put-back-in-inventory steps will be needed any more. Much nicer.
329 lines
12 KiB
Lua
329 lines
12 KiB
Lua
local facedir_rotate = {
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['x'] = {
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[-1] = {[0]=4, 5, 6, 7, 22, 23, 20, 21, 0, 1, 2, 3, 13, 14, 15, 12, 19, 16, 17, 18, 10, 11, 8, 9}, -- 270 degrees
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[1] = {[0]=8, 9, 10, 11, 0, 1, 2, 3, 22, 23, 20, 21, 15, 12, 13, 14, 17, 18, 19, 16, 6, 7, 4, 5}, -- 90 degrees
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},
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['y'] = {
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[-1] = {[0]=3, 0, 1, 2, 19, 16, 17, 18, 15, 12, 13, 14, 7, 4, 5, 6, 11, 8, 9, 10, 21, 22, 23, 20}, -- 270 degrees
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[1] = {[0]=1, 2, 3, 0, 13, 14, 15, 12, 17, 18, 19, 16, 9, 10, 11, 8, 5, 6, 7, 4, 23, 20, 21, 22}, -- 90 degrees
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},
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['z'] = {
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[-1] = {[0]=16, 17, 18, 19, 5, 6, 7, 4, 11, 8, 9, 10, 0, 1, 2, 3, 20, 21, 22, 23, 12, 13, 14, 15}, -- 270 degrees
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[1] = {[0]=12, 13, 14, 15, 7, 4, 5, 6, 9, 10, 11, 8, 20, 21, 22, 23, 0, 1, 2, 3, 16, 17, 18, 19}, -- 90 degrees
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}
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}
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local wallmounted_rotate = {
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['x'] = {
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[-1] = {[0]=4, 5, 2, 3, 1, 0}, -- 270 degrees
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[1] = {[0]=5, 4, 2, 3, 0, 1}, -- 90 degrees
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},
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['y'] = {
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[-1] = {[0]=0, 1, 4, 5, 3, 2}, -- 270 degrees
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[1] = {[0]=0, 1, 5, 4, 2, 3}, -- 90 degrees
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},
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['z'] = {
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[-1] = {[0]=3, 2, 0, 1, 4, 5}, -- 270 degrees
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[1] = {[0]=2, 3, 1, 0, 4, 5}, -- 90 degrees
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}
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}
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--90 degrees CW about x-axis: (x, y, z) -> (x, -z, y)
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--90 degrees CCW about x-axis: (x, y, z) -> (x, z, -y)
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--90 degrees CW about y-axis: (x, y, z) -> (-z, y, x)
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--90 degrees CCW about y-axis: (x, y, z) -> (z, y, -x)
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--90 degrees CW about z-axis: (x, y, z) -> (y, -x, z)
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--90 degrees CCW about z-axis: (x, y, z) -> (-y, x, z)
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local rotate_pos = function(axis, direction, pos)
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if axis == "x" then
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if direction < 0 then
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return {x= pos.x, y= -pos.z, z= pos.y}
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else
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return {x= pos.x, y= pos.z, z= -pos.y}
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end
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elseif axis == "y" then
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if direction < 0 then
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return {x= -pos.z, y= pos.y, z= pos.x}
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else
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return {x= pos.z, y= pos.y, z= -pos.x}
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end
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else
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if direction < 0 then
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return {x= -pos.y, y= pos.x, z= pos.z}
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else
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return {x= pos.y, y= -pos.x, z= pos.z}
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end
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end
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end
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local get_node_image = function(pos, node)
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local node_image = {node=node, pos={x=pos.x, y=pos.y, z=pos.z}}
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node_image.paramtype2 = minetest.registered_nodes[node.name].paramtype2
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local meta = minetest.get_meta(pos)
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node_image.meta = meta:to_table()
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-- Record what kind of thing we've got in a builder node so its facing can be rotated properly
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if minetest.get_item_group(node.name, "digtron") == 4 then
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local build_item = node_image.meta.inventory.main[1]
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if build_item ~= "" then
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local build_item_def = minetest.registered_nodes[ItemStack(build_item):get_name()]
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node_image.build_item_paramtype2 = build_item_def.paramtype2
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end
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end
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return node_image
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end
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local rotate_node_image = function(node_image, origin, axis, direction, old_pos_pointset)
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-- Facings
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if node_image.paramtype2 == "wallmounted" then
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node_image.node.param2 = wallmounted_rotate[axis][direction][node_image.node.param2]
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elseif node_image.paramtype2 == "facedir" then
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node_image.node.param2 = facedir_rotate[axis][direction][node_image.node.param2]
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end
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if node_image.build_item_paramtype2 == "wallmounted" then
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node_image.meta.fields.build_facing = wallmounted_rotate[axis][direction][tonumber(node_image.meta.fields.build_facing)]
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elseif node_image.build_item_paramtype2 == "facedir" then
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node_image.meta.fields.build_facing = facedir_rotate[axis][direction][tonumber(node_image.meta.fields.build_facing)]
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end
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node_image.meta.fields.waiting = nil -- If we're rotating a controller that's in the "waiting" state, clear it. Otherwise it may stick like that.
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-- record the old location so we can destroy the old node if the rotation operation is possible
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old_pos_pointset:set(node_image.pos.x, node_image.pos.y, node_image.pos.z, true)
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-- position in space relative to origin
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local pos = vector.subtract(node_image.pos, origin)
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pos = rotate_pos(axis, direction, pos)
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-- Move back to original reference frame
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node_image.pos = vector.add(pos, origin)
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return node_image
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end
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-- Rotates 90 degrees widdershins around the axis defined by facedir (which in this case is pointing out the front of the node, so it needs to be converted into an upward-pointing axis internally)
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digtron.rotate_layout_image = function(layout_image, facedir)
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-- To convert this into the direction the "top" of the axel node is pointing in:
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-- 0, 1, 2, 3 == (0,1,0)
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-- 4, 5, 6, 7 == (0,0,1)
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-- 8, 9, 10, 11 == (0,0,-1)
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-- 12, 13, 14, 15 == (1,0,0)
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-- 16, 17, 18, 19 == (-1,0,0)
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-- 20, 21, 22, 23== (0,-1,0)
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local top = {
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[0]={axis="y", dir=-1},
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{axis="z", dir=1},
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{axis="z", dir=-1},
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{axis="x", dir=1},
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{axis="x", dir=-1},
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{axis="y", dir=1},
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}
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local params = top[math.floor(facedir/4)]
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for k, node_image in pairs(layout_image.all) do
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rotate_node_image(node_image, layout_image.controller, params.axis, params.dir, layout_image.old_pos_pointset)
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end
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return layout_image
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end
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digtron.move_layout_image = function(layout_image, facing, player_name)
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local extents = layout_image.extents
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local dir = digtron.facedir_to_dir_map[facing]
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local increment
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local filter
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if dir == 1 then -- z+
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filter = "z"
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increment = 1
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extents.max_z = extents.max_z + 1
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extents.min_z = extents.min_z + 1
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elseif dir == 2 then -- x+
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filter = "x"
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increment = 1
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extents.max_x = extents.max_x + 1
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extents.min_x = extents.min_x + 1
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elseif dir == 3 then -- z-
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filter = "z"
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increment = -1
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extents.max_z = extents.max_z - 1
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extents.min_z = extents.min_z - 1
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elseif dir == 4 then -- x-
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filter = "x"
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increment = -1
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extents.max_x = extents.max_x - 1
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extents.min_x = extents.min_x - 1
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elseif dir == 5 then -- y-
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filter = "y"
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increment = -1
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extents.max_y = extents.max_y - 1
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extents.min_y = extents.min_y - 1
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elseif dir == 6 then -- y+
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filter = "y"
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increment = 1
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extents.max_y = extents.max_y + 1
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extents.min_y = extents.min_y + 1
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end
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for k, node_image in pairs(layout_image.all) do
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layout_image.old_pos_pointset:set(node_image.pos.x, node_image.pos.y, node_image.pos.z, true)
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node_image.pos[filter] = node_image.pos[filter] + increment
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layout_image.nodes_dug:set(node_image.pos.x, node_image.pos.y, node_image.pos.z, false) -- we've moved a digtron node into this space, mark it so that we don't dig it.
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-- TODO: log
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end
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end
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digtron.can_write_layout_image = function(layout_image, player)
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for k, node_image in pairs(layout_image.all) do
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if not layout_image.old_pos_pointset:get(node_image.pos.x, node_image.pos.y, node_image.pos.z)
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and not minetest.registered_nodes[minetest.get_node(node_image.pos).name].buildable_to then
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return false
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elseif minetest.is_protected(node_image.pos, player:get_player_name()) and not minetest.check_player_privs(player, "protection_bypass") then
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return false
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end
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end
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return true
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end
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digtron.write_layout_image = function(layout_image)
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-- destroy the old digtron
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local oldpos, _ = layout_image.old_pos_pointset:pop()
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while oldpos ~= nil do
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local old_def = minetest.registered_nodes[minetest.get_node(oldpos).name]
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minetest.remove_node(oldpos)
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if old_def.after_dig_node ~= nil then
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old_def.after_dig_node(oldpos)
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end
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oldpos, _ = layout_image.old_pos_pointset:pop()
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end
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-- create the new one
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for k, node_image in pairs(layout_image.all) do
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minetest.add_node(node_image.pos, node_image.node)
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minetest.get_meta(node_image.pos):from_table(node_image.meta)
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local new_def = minetest.registered_nodes[node_image.node.name]
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if new_def.after_place_node ~= nil then
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new_def.after_place_node(node_image.pos)
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end
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end
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end
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-- Similar to get_layout, but far more comprehensive. This produces a data structure that will allow the digtron to be rotated and then recreated in its entirety.
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digtron.get_layout_image = function(pos, player)
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local image = {}
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--initialize. We're assuming that the start position is a controller digtron, should be a safe assumption since only the controller node should call this
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image.traction = 0
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image.all = {}
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image.inventories = {}
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image.fuelstores = {}
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image.diggers = {}
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image.builders = {}
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image.extents = {}
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image.water_touching = false
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image.lava_touching = false
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image.protected = Pointset.create() -- if any nodes we look at are protected, make note of that. That way we don't need to keep re-testing protection state later.
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image.old_pos_pointset = Pointset.create() -- For tracking original location of nodes if we do transformations on the Digtron
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image.nodes_dug = Pointset.create() -- For tracking adjacent nodes that will have been dug by digger heads in future
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image.contains_protected_node = false -- used to indicate if at least one node in this digtron array is protected from the player.
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image.controller = {x=pos.x, y=pos.y, z=pos.z} --Make a deep copy of the pos parameter just in case the calling code wants to play silly buggers with it
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table.insert(image.all, get_node_image(pos, minetest.get_node(pos))) -- We never visit the source node, so insert it into the all table a priori. Revisit this if a controller node is created that contains fuel or inventory or whatever.
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image.extents.max_x = pos.x
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image.extents.min_x = pos.x
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image.extents.max_y = pos.y
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image.extents.min_y = pos.y
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image.extents.max_z = pos.z
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image.extents.min_z = pos.z
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-- temporary pointsets used while searching
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local to_test = Pointset.create()
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local tested = Pointset.create()
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tested:set(pos.x, pos.y, pos.z, true)
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to_test:set(pos.x + 1, pos.y, pos.z, true)
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to_test:set(pos.x - 1, pos.y, pos.z, true)
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to_test:set(pos.x, pos.y + 1, pos.z, true)
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to_test:set(pos.x, pos.y - 1, pos.z, true)
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to_test:set(pos.x, pos.y, pos.z + 1, true)
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to_test:set(pos.x, pos.y, pos.z - 1, true)
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if minetest.is_protected(pos, player:get_player_name()) and not minetest.check_player_privs(player, "protection_bypass") then
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image.protected:set(pos.x, pos.y, pos.z, true)
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image.contains_protected_node = true
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end
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-- Do a loop on to_test positions, adding new to_test positions as we find digtron nodes. This is a flood fill operation
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-- that follows node faces (no diagonals)
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local testpos, _ = to_test:pop()
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while testpos ~= nil do
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tested:set(testpos.x, testpos.y, testpos.z, true) -- track nodes we've looked at to prevent infinite loops
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local node = minetest.get_node(testpos)
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if node.name == "ignore" then
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--buildtron array is next to unloaded nodes, too dangerous to do anything. Abort.
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return nil
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end
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if minetest.get_item_group(node.name, "water") ~= 0 then
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image.water_touching = true
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elseif minetest.get_item_group(node.name, "lava") ~= 0 then
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image.lava_touching = true
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if digtron.lava_impassible == true then
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image.protected:set(testpos.x, testpos.y, testpos.z, true)
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end
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end
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local group_number = minetest.get_item_group(node.name, "digtron")
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if group_number > 0 then
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--found one. Add it to the digtrons output
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local node_image = get_node_image(testpos, node)
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table.insert(image.all, node_image)
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-- add a reference to this node's position to special node lists
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if group_number == 2 then
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table.insert(image.inventories, node_image)
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elseif group_number == 3 then
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table.insert(image.diggers, node_image)
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elseif group_number == 4 then
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table.insert(image.builders, node_image)
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elseif group_number == 5 then
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table.insert(image.fuelstores, node_image)
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elseif group_number == 6 then
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table.insert(image.inventories, node_image)
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table.insert(image.fuelstores, node_image)
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end
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if minetest.is_protected(pos, player:get_player_name()) and not minetest.check_player_privs(player, "protection_bypass") then
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image.contains_protected_node = true
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end
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-- update extents
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image.extents.max_x = math.max(image.extents.max_x, testpos.x)
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image.extents.min_x = math.min(image.extents.min_x, testpos.x)
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image.extents.max_y = math.max(image.extents.max_y, testpos.y)
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image.extents.min_y = math.min(image.extents.min_y, testpos.y)
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image.extents.max_z = math.max(image.extents.max_z, testpos.z)
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image.extents.min_z = math.min(image.extents.min_z, testpos.z)
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--queue up potential new test points adjacent to this digtron node
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to_test:set_if_not_in(tested, testpos.x + 1, testpos.y, testpos.z, true)
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to_test:set_if_not_in(tested, testpos.x - 1, testpos.y, testpos.z, true)
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to_test:set_if_not_in(tested, testpos.x, testpos.y + 1, testpos.z, true)
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to_test:set_if_not_in(tested, testpos.x, testpos.y - 1, testpos.z, true)
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to_test:set_if_not_in(tested, testpos.x, testpos.y, testpos.z + 1, true)
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to_test:set_if_not_in(tested, testpos.x, testpos.y, testpos.z - 1, true)
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elseif minetest.registered_nodes[node.name].buildable_to ~= true then
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-- Tracks whether the digtron is hovering in mid-air. If any part of the digtron array touches something solid it gains traction.
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image.traction = image.traction + 1
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end
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testpos, _ = to_test:pop()
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end
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return image
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end
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