example code and ship blueprints added

README.md

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+This is a mod for MineTest.
+
+It spawns pre-built ships and rafts at mapgen time on water.
+
+Depends on handle_schematics.

depends.txt

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+handle_schematics

init.lua

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+
+ships_on_mapgen = {}
+
+-- if set to 100: place one ship in each mapchunk if possible;
+-- if set to a lower value: percent chance of placing a ship
+-- in a mapchunk
+ships_on_mapgen.probability_per_mapchunk = 100;
+
+ships_on_mapgen.schematics = {
+	-- yoff: how deep is the ship burried in water?
+--	{scm="boat", typ="ship", is_ship=true, yoff=-1, orients={0}},
+--	{scm="shipc_4_270", typ="ship", is_ship=true, orients={0}}
+
+	-- big sailing ship
+	{scm="ship_sokomine_big_3_180", typ="ship", is_ship=true, orients={0}},
+	-- some smaller rafts
+	-- raft for general transport purposes
+	{scm="raft_1_2_180", typ="ship", is_ship=true, orients={0}},
+	-- raft with fences for transporting passagers or cattle
+	{scm="raft_2_2_180", typ="ship", is_ship=true, orients={0}},
+	-- raft with hut on it
+	{scm="raft_3_2_180", typ="ship", is_ship=true, orients={0}},
+}
+
+
+ships_on_mapgen.mts_path = minetest.get_modpath( minetest.get_current_modname() ).."/schems/";
+
+-- determine the size of the given houses and other necessary values
+for i,v in ipairs( ships_on_mapgen.schematics ) do
+	v.mts_path = ships_on_mapgen.mts_path;
+	v.is_ship = true;
+	v.typ = "ship";
+	ships_on_mapgen.schematics[ i ] = handle_schematics.analyze_file( nil, nil, v.mts_path .. v.scm, v, false ); 
+end
+
+
+minetest.register_on_generated(function(minp, maxp, seed)
+	-- no point in placing boats on mountains or deep below sealevel
+	if( minp.y < -64 or minp.y > 0) then
+		return;
+	end
+
+	local heightmap = minetest.get_mapgen_object('heightmap');
+	if( not( heightmap )) then
+		return;
+	end
+
+	-- place a ship on water if possible; do this with the given probability
+	if( math.random(1,100)<ships_on_mapgen.probability_per_mapchunk ) then
+		-- I have accidently used the building spawner instead of a chest when building the
+		-- rafts. But that can easily be corrected here.
+		local replacements = {{'handle_schematics:build','default:chest'}};
+		-- choose a random ship
+		local building = ships_on_mapgen.schematics[ math.random(1,#ships_on_mapgen.schematics) ];
+		-- the boat file uses strange blocks not occouring in default
+		if( building.scm == "boat" ) then
+			replacements = {
+				{'color:orange', 'default:wood'},
+				{'color:white', 'wool:white'},
+				{'color:black', 'wool:black'}};
+		elseif( math.random(1,3)>1) then
+			-- colored sails can make the ships more intresting
+			local colors = {"white", "white", "yellow", "grey", "black", "brown", "dark_green"};
+			table.insert( replacements, {"cottages:wool", "wool:"..colors[math.random(1,#colors)]});
+		else
+			-- not all ships have sails set
+			table.insert( replacements, {"cottages:wool", "air"});
+		end
+		local success = handle_schematics.place_schematic_on_flat_land( heightmap, minp, maxp,
+			building.sizex, building.sizez, -100, building.yoff-1,
+			3, 3, 0, 0, -- margin: front, back, right, left
+			ships_on_mapgen.mts_path..building.scm, --..".mts",
+			replacements,
+			building.yoff,
+			building.orients[1],
+			building
+			);
+	end
+end);