Sokomine/handle_schematics
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do not set air below waterlevel for ships

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Sokomine 2018-07-30 04:51:08 +02:00
parent 39d3d03765
commit 173890d4e2
1 changed files with 79 additions and 0 deletions
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79
analyze_file.lua
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@ -1,3 +1,51 @@
-- helper functions for ships submerged below water;
-- this one fills a node with water (or more preceisely: ignore) if it
-- has one water node at one side, or above, or is located at one side
-- on a submerged level
local floodfill_one_spot = function( res, air_id, ignore_table, x, y, z)
if( res.scm_data_cache[y][x][z]) then
return;
end
-- water flows in from the sides
if( x==1 or x==res.size.x or z==1 or z==res.size.z) then
res.scm_data_cache[y][x][z] = ignore_table;
-- or if there is at least one neighbour filled with water
elseif( res.scm_data_cache[y+1][x][z] == ignore_table
or res.scm_data_cache[y][x+1][z] == ignore_table
or res.scm_data_cache[y][x-1][z] == ignore_table
or res.scm_data_cache[y][x+1][z] == ignore_table
or res.scm_data_cache[y][x][z-1] == ignore_table
or res.scm_data_cache[y][x][z+1] == ignore_table) then
res.scm_data_cache[y][x][z] = ignore_table;
end
end
-- check which parts of the schematic will have to be ignore due to beeing
-- water flowing around
local floodfill_with_ignore = function( res, air_id, ignore_table )
-- from water surface level downward
for y=-1*res.yoff + 1, 1, -1 do
for x=1, res.size.x do
for z=1, res.size.z do
floodfill_one_spot( res, air_id, ignore_table, x, y, z);
end
end
end
-- and now from the opposite side so that water may reach corners it
-- didn't reach previously
for y=-1*res.yoff + 1, 1, -1 do
for z=res.size.z, 1, -1 do
for x=res.size.x, 1, -1 do
floodfill_one_spot( res, air_id, ignore_table, x, y, z);
end
end
end
-- Note: For a complete fill, more runs would be necessary. With these
-- calls here, most of the nodes get covered. The small remaining
-- rest can be handled by real water.
end
-- read .mts (minetest schematic), .we (WorldEdit) and .schematic (MC schematic format) files
-- file_name: file name with full path but without file name exstension
-- origin_offset: .we files may have this defined if their start is not at 0,0,0
@ -130,5 +178,36 @@ handle_schematics.analyze_file = function( file_name, origin_offset, store_as_mt
build_chest.add_entry( {'main', modname, modname, building_data.scm, file_name });
end
-- ships need ignore nodes around them so that the water around them doesn't get
-- replaced when they are put in the sea
if( res.is_ship and res.yoff and res.yoff < 0) then
-- we need to find out which node type represents air in this particular schematic
local air_id = 1;
local ignore_id = 0;
for i,n in ipairs( res.nodenames ) do
if( n == "air") then
air_id = i;
end
if( n == "ignore" or n == "mg:ignore" ) then
ignore_id = i;
end
end
-- if necessary add an ignore node
if( ignore_id == 0 ) then
table.insert( res.nodenames, "mg:ignore" );
ignore_id = #res.nodenames;
end
-- yoff is needed so that we know how far the ship is submerged
if( not( res.yoff )) then
res.yoff = 0;
end
local c_air = minetest.get_content_id("air");
local ignore = {ignore_id,0};
floodfill_with_ignore( res, air_id, ignore );
end
return res;
end