143 lines
3.7 KiB
Lua
143 lines
3.7 KiB
Lua
local function place_circle(player, pos, node)
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local player_data = edit.player_data[player]
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if
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player:get_player_control().aux1 or
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not player_data or
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not player_data.circle_luaentity
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or player_data.ignore_node_placement
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then return end
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local center = player_data.circle_luaentity._pos
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center.y = pos.y
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local radius = vector.distance(center, pos)
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if radius < 1 then
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minetest.set_node(pos, node)
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return
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else
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minetest.remove_node(pos)
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end
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local radius_rounded = math.ceil(radius) + 1
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local size = vector.new(radius_rounded * 2, 1, radius_rounded * 2)
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if size.x * size.y * size.z > edit.max_operation_volume then
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edit.display_size_error(player)
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return
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end
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player_data.undo_schematic = edit.schematic_from_map(
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vector.subtract(vector.round(center), vector.new(radius_rounded, 0, radius_rounded)),
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size
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)
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player_data.ignore_node_placement = true -- Stop infinite recursion
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-- Midpoint circle algorithm
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local x = radius
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local z = 0
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if center.z % 1 ~= 0 then -- Is the marker in the middle of a node?
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z = z + 0.5
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end
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while x >= z do
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for factor_x = -1, 1, 2 do
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for factor_z = -1, 1, 2 do
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local factor = vector.new(factor_x, 1, factor_z)
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local offset1 = vector.new(x, 0, z)
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offset1 = vector.new(
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offset1.x * factor.x,
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offset1.y * factor.y,
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offset1.z * factor.z )
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local pos1 = vector.add(center, offset1)
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edit.place_node_like_player(player, node, pos1)
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local offset2 = vector.new(
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offset1.z,
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offset1.y,
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offset1.x
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)
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local pos2 = vector.add(center, offset2)
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edit.place_node_like_player(player, node, pos2)
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end
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end
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z = z + 1
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while z * z + x * x > radius * radius do
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x = x - 1
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end
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end
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player_data.ignore_node_placement = false
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end
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minetest.register_on_dignode(function(pos, oldnode, digger)
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if not digger or not digger:is_player() then return end
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return place_circle(digger, pos, {name = "air"}) or true
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end)
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minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
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if not placer then return end
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return place_circle(placer, pos, newnode)
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end)
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local function circle_tool_on_place(itemstack, player, pointed_thing)
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if not edit.on_place_checks(player) then return end
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local d = edit.player_data[player]
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if d.circle_luaentity then
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d.circle_luaentity.object:remove()
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end
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local pos = edit.get_half_node_pointed_pos(player)
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d.circle_luaentity = edit.add_marker("edit:circle", pos, player)
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d.circle_hud = player:hud_add({
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hud_elem_type = "text",
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text = "CIRCLE MODE\n\nPunch the circle center to exit.\nPress the aux1 key (E) while placing to bypass.",
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position = {x = 0.5, y = 0.8},
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z_index = 100,
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number = 0xffffff
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})
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end
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minetest.register_tool("edit:circle",{
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description = "Edit Circle",
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tiles = {"edit_circle.png"},
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inventory_image = "edit_circle.png",
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range = 10,
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groups = {edit_place_preview = 1,},
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on_place = circle_tool_on_place,
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on_secondary_use = circle_tool_on_place,
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_edit_get_pointed_pos = function(player)
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return edit.get_half_node_pointed_pos(player)
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end,
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})
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minetest.register_entity("edit:circle", {
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initial_properties = {
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visual = "cube",
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visual_size = { x = 1.1, y = 1.1},
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physical = false,
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collide_with_objects = false,
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static_save = false,
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use_texture_alpha = true,
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glow = -1,
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backface_culling = false,
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hp_max = 1,
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textures = {
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"edit_circle.png",
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"edit_circle.png",
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"edit_circle.png",
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"edit_circle.png",
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"edit_circle.png",
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"edit_circle.png",
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},
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},
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on_deactivate = function(self)
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local player_data = edit.player_data[self._placer]
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if player_data then
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player_data.circle_luaentity = nil
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self._placer:hud_remove(player_data.circle_hud)
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player_data.circle_hud = nil
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end
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end,
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})
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