From be23a94ddc865b7950d4e11425e6253481c28e9f Mon Sep 17 00:00:00 2001
From: Mat <mat.gregory@virginmedia.com>
Date: Mon, 23 Jun 2014 01:16:52 +0100
Subject: [PATCH] Voxelmanip checks space before spawn

---
 README.txt |  4 +--
 init.lua   | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 88 insertions(+), 6 deletions(-)

diff --git a/README.txt b/README.txt
index 9b09521..ae1deb0 100644
--- a/README.txt
+++ b/README.txt
@@ -1,4 +1,4 @@
-projects 0.1.0 by paramat
-For Minetest 0.4.9 dev
+projects 0.1.1 by paramat
+For Minetest
 Depends default
 Licenses: code WTFPL
diff --git a/init.lua b/init.lua
index 3860d6c..9e3f2db 100644
--- a/init.lua
+++ b/init.lua
@@ -1,8 +1,10 @@
--- projects 0.1.0 by paramat
--- For 
+-- projects 0.1.1 by paramat
+-- For Minetest
 -- Depends default
 -- License: code WTFPL
 
+-- rotation 0 90 180 270 is clockwise
+
 -- Parameters
 
 
@@ -22,7 +24,7 @@ minetest.register_node("projects:flatn", {
 })
 
 minetest.register_node("projects:flats", {
-	description = "Spawn Flat SOuth",
+	description = "Spawn Flat South",
 	drawtype = "airlike",
 	paramtype = "light",
 	sunlight_propagates = true,
@@ -54,9 +56,29 @@ minetest.register_abm({
 	interval = 13,
 	chance = 1,
 	action = function(pos, node)
+		local x = pos.x
+		local y = pos.y
+		local z = pos.z
+		local c_air = minetest.get_content_id("air")
+		local c_ignore = minetest.get_content_id("ignore")
+		local vm = minetest.get_voxel_manip()
+		local pos1 = {x=x-6, y=y-1, z=z+1}
+		local pos2 = {x=x+1, y=y+3, z=z+8}
+		local emin, emax = vm:read_from_map(pos1, pos2)
+		local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
+		local data = vm:get_data()
+		for vi in area:iterp(pos1, pos2) do
+			local nodid = data[vi]
+			if nodid ~= c_air and nodid ~= c_ignore then
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				pos.y = pos.y + 1
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				return
+			end
+		end
 		minetest.add_node(pos, {name="air"})
 		local path = minetest.get_modpath("projects") .. "/schems/flat.mts"
-		minetest.place_schematic({x=pos.x-6, y=pos.y-1, z=pos.z+1}, path, 90, nil, true)
+		minetest.place_schematic({x=x-6, y=y-1, z=z+1}, path, 90, nil, true)
 	end,
 })
 
@@ -67,6 +89,26 @@ minetest.register_abm({
 	interval = 14,
 	chance = 1,
 	action = function(pos, node)
+		local x = pos.x
+		local y = pos.y
+		local z = pos.z
+		local c_air = minetest.get_content_id("air")
+		local c_ignore = minetest.get_content_id("ignore")
+		local vm = minetest.get_voxel_manip()
+		local pos1 = {x=x-1, y=y-1, z=z-8}
+		local pos2 = {x=x+6, y=y+3, z=z-1}
+		local emin, emax = vm:read_from_map(pos1, pos2)
+		local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
+		local data = vm:get_data()
+		for vi in area:iterp(pos1, pos2) do
+			local nodid = data[vi]
+			if nodid ~= c_air and nodid ~= c_ignore then
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				pos.y = pos.y + 1
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				return
+			end
+		end
 		minetest.add_node(pos, {name="air"})
 		local path = minetest.get_modpath("projects") .. "/schems/flat.mts"
 		minetest.place_schematic({x=pos.x-1, y=pos.y-1, z=pos.z-8}, path, 270, nil, true)
@@ -80,6 +122,26 @@ minetest.register_abm({
 	interval = 15,
 	chance = 1,
 	action = function(pos, node)
+		local x = pos.x
+		local y = pos.y
+		local z = pos.z
+		local c_air = minetest.get_content_id("air")
+		local c_ignore = minetest.get_content_id("ignore")
+		local vm = minetest.get_voxel_manip()
+		local pos1 = {x=x+1, y=y-1, z=z-1}
+		local pos2 = {x=x+8, y=y+3, z=z+6}
+		local emin, emax = vm:read_from_map(pos1, pos2)
+		local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
+		local data = vm:get_data()
+		for vi in area:iterp(pos1, pos2) do
+			local nodid = data[vi]
+			if nodid ~= c_air and nodid ~= c_ignore then
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				pos.y = pos.y + 1
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				return
+			end
+		end
 		minetest.add_node(pos, {name="air"})
 		local path = minetest.get_modpath("projects") .. "/schems/flat.mts"
 		minetest.place_schematic({x=pos.x+1, y=pos.y-1, z=pos.z-1}, path, 180, nil, true)
@@ -93,6 +155,26 @@ minetest.register_abm({
 	interval = 16,
 	chance = 1,
 	action = function(pos, node)
+		local x = pos.x
+		local y = pos.y
+		local z = pos.z
+		local c_air = minetest.get_content_id("air")
+		local c_ignore = minetest.get_content_id("ignore")
+		local vm = minetest.get_voxel_manip()
+		local pos1 = {x=x-8, y=y-1, z=z-6}
+		local pos2 = {x=x-1, y=y+3, z=z+1}
+		local emin, emax = vm:read_from_map(pos1, pos2)
+		local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
+		local data = vm:get_data()
+		for vi in area:iterp(pos1, pos2) do
+			local nodid = data[vi]
+			if nodid ~= c_air and nodid ~= c_ignore then
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				pos.y = pos.y + 1
+				minetest.add_node(pos, {name="default:sandstonebrick"})
+				return
+			end
+		end
 		minetest.add_node(pos, {name="air"})
 		local path = minetest.get_modpath("projects") .. "/schems/flat.mts"
 		minetest.place_schematic({x=pos.x-8, y=pos.y-1, z=pos.z-6}, path, 0, nil, true)