technic/technic/frames.lua

function get_face(pos,ppos,pvect)
	ppos={x=ppos.x-pos.x,y=ppos.y-pos.y+1.5,z=ppos.z-pos.z}
	if pvect.x>0 then
		local t=(-0.5-ppos.x)/pvect.x
		local y_int=ppos.y+t*pvect.y
		local z_int=ppos.z+t*pvect.z
		if y_int>-0.4 and y_int<0.4 and z_int>-0.4 and z_int<0.4 then return 1 end 
	elseif pvect.x<0 then
		local t=(0.5-ppos.x)/pvect.x
		local y_int=ppos.y+t*pvect.y
		local z_int=ppos.z+t*pvect.z
		if y_int>-0.4 and y_int<0.4 and z_int>-0.4 and z_int<0.4 then return 2 end 
	end
	if pvect.y>0 then
		local t=(-0.5-ppos.y)/pvect.y
		local x_int=ppos.x+t*pvect.x
		local z_int=ppos.z+t*pvect.z
		if x_int>-0.4 and x_int<0.4 and z_int>-0.4 and z_int<0.4 then return 3 end 
	elseif pvect.y<0 then
		local t=(0.5-ppos.y)/pvect.y
		local x_int=ppos.x+t*pvect.x
		local z_int=ppos.z+t*pvect.z
		if x_int>-0.4 and x_int<0.4 and z_int>-0.4 and z_int<0.4 then return 4 end 
	end
	if pvect.z>0 then
		local t=(-0.5-ppos.z)/pvect.z
		local x_int=ppos.x+t*pvect.x
		local y_int=ppos.y+t*pvect.y
		if x_int>-0.4 and x_int<0.4 and y_int>-0.4 and y_int<0.4 then return 5 end 
	elseif pvect.z<0 then
		local t=(0.5-ppos.z)/pvect.z
		local x_int=ppos.x+t*pvect.x
		local y_int=ppos.y+t*pvect.y
		if x_int>-0.4 and x_int<0.4 and y_int>-0.4 and y_int<0.4 then return 6 end 
	end
end


for xm=0,1 do
for xp=0,1 do
for ym=0,1 do
for yp=0,1 do
for zm=0,1 do
for zp=0,1 do

local a=8/16
local b=7/16
local nodeboxes= {
	{ -a, -a, -a, -b,  a, -b },
	{ -a, -a,  b, -b,  a,  a },
	{  b, -a,  b,  a,  a,  a },
	{  b, -a, -a,  a,  a, -b },

	{ -b,  b, -a,  b,  a, -b },
	{ -b, -a, -a,  b, -b, -b },
	
	{ -b,  b,  b,  b,  a,  a },
	{ -b, -a,  b,  b, -b,  a },

	{  b,  b, -b,  a,  a,  b },
	{  b, -a, -b,  a, -b,  b },

	{ -a,  b, -b, -b,  a,  b },
	{ -a, -a, -b, -b, -b,  b },
	}
	
	if yp==0 then
		table.insert(nodeboxes, {-b,b,-b, b,a,b})
	end
	if ym==0 then
		table.insert(nodeboxes, {-b,-a,-b, b,-b,b})
	end
	if xp==0 then
		table.insert(nodeboxes, {b,b,b,a,-b,-b})
	end
	if xm==0 then
		table.insert(nodeboxes, {-a,-b,-b,-b,b,b})
	end
	if zp==0 then
		table.insert(nodeboxes, {-b,-b,b, b,b,a})
	end
	if zm==0 then
		table.insert(nodeboxes, {-b,-b,-a, b,b,-b})
	end
	
	local nameext=tostring(xm)..tostring(xp)..tostring(ym)..tostring(yp)..tostring(zm)..tostring(zp)
	local groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2}
	if nameext~="111111" then groups.not_in_creative_inventory=1 end
	

	minetest.register_node("technic:frame_"..nameext,{
		description = "Frame",
		tiles = {"technic_frame.png"},
		groups=groups,
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
		fixed=nodeboxes,
		},
		selection_box = {
			type="fixed",
			fixed={-0.5,-0.5,-0.5,0.5,0.5,0.5}
		},
		paramtype = "light",
		frame=1,
		drop="technic:frame_111111",
		frame_connect_all=function(pos)
			local nodename=minetest.env:get_node(pos).name
			l2={}
			l1={{x=-1,y=0,z=0},{x=1,y=0,z=0},{x=0,y=-1,z=0},{x=0,y=1,z=0},{x=0,y=0,z=-1},{x=0,y=0,z=1}}
			for i,dir in ipairs(l1) do
				if string.sub(nodename,-7+i,-7+i)=="1" then
					l2[#(l2)+1]=dir
				end
			end
			return l2
		end,
		on_punch=function(pos,node,puncher)
			local ppos=puncher:getpos()
			local pvect=puncher:get_look_dir()
			local pface=get_face(pos,ppos,pvect)
			if pface==nil then return end
			local nodename=node.name
			local newstate=tostring(1-tonumber(string.sub(nodename,-7+pface,-7+pface)))
			if pface<=5 then
				nodename=string.sub(nodename,1,-7+pface-1)..newstate..string.sub(nodename,-7+pface+1)
			else
				nodename=string.sub(nodename,1,-2)..newstate
			end
			node.name=nodename
			minetest.env:set_node(pos,node)
		end
	})

end
end
end
end
end
end


function frame_motor1_on(pos,node)
	local npos={x=pos.x,y=pos.y+1,z=pos.z}
	local nnode=minetest.env:get_node(npos)
	if node.param2==0 then
		dir={x=1,y=0,z=0}
	elseif node.param2==1 then
		dir={x=0,y=0,z=-1}
	elseif node.param2==2 then
		dir={x=-1,y=0,z=0}
	else
		dir={x=0,y=0,z=1}
	end
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end

function frame_motor2_on(pos,node)
	local npos={x=pos.x,y=pos.y-1,z=pos.z}
	local nnode=minetest.env:get_node(npos)
	if node.param2==0 then
		dir={x=1,y=0,z=0}
	elseif node.param2==1 then
		dir={x=0,y=0,z=-1}
	elseif node.param2==2 then
		dir={x=-1,y=0,z=0}
	else
		dir={x=0,y=0,z=1}
	end
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end

function frame_motor3_on(pos,node)
	local npos={x=pos.x,y=pos.y,z=pos.z}
	if node.param2==0 then
		dir={x=1,y=0,z=0}
		npos.z=npos.z-1
	elseif node.param2==1 then
		dir={x=0,y=0,z=-1}
		npos.x=npos.x-1
	elseif node.param2==2 then
		dir={x=-1,y=0,z=0}
		npos.z=npos.z+1
	else
		dir={x=0,y=0,z=1}
		npos.x=npos.x+1
	end
	local nnode=minetest.env:get_node(npos)
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end

function frame_motor4_on(pos,node)
	local npos={x=pos.x,y=pos.y,z=pos.z}
	if node.param2==0 then
		dir={x=-1,y=0,z=0}
		npos.z=npos.z-1
	elseif node.param2==1 then
		dir={x=0,y=0,z=1}
		npos.x=npos.x-1
	elseif node.param2==2 then
		dir={x=1,y=0,z=0}
		npos.z=npos.z+1
	else
		dir={x=0,y=0,z=-1}
		npos.x=npos.x+1
	end
	local nnode=minetest.env:get_node(npos)
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end

function frame_motor5_on(pos,node)
	local npos={x=pos.x,y=pos.y,z=pos.z}
	if node.param2==0 then
		npos.z=npos.z-1
	elseif node.param2==1 then
		npos.x=npos.x-1
	elseif node.param2==2 then
		npos.z=npos.z+1
	else
		npos.x=npos.x+1
	end
	dir={x=0,y=1,z=0}
	local nnode=minetest.env:get_node(npos)
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end

function frame_motor6_on(pos,node)
	local npos={x=pos.x,y=pos.y,z=pos.z}
	if node.param2==0 then
		npos.z=npos.z-1
	elseif node.param2==1 then
		npos.x=npos.x-1
	elseif node.param2==2 then
		npos.z=npos.z+1
	else
		npos.x=npos.x+1
	end
	dir={x=0,y=-1,z=0}
	local nnode=minetest.env:get_node(npos)
	if minetest.registered_nodes[nnode.name].frame==1 then
		local connected_nodes=get_connected_nodes(npos)
		move_nodes_vect(connected_nodes,dir)
	end
end


minetest.register_node("technic:frame_motor1",{
	description = "Frame motor 1",
	tiles = {"pipeworks_filter_top.png", "technic_lv_cable.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor1_on}},
	frames_can_connect=function(pos,dir)
		return dir.y~=-1
	end
})

minetest.register_node("technic:frame_motor2",{
	description = "Frame motor 2",
	tiles = {"technic_lv_cable.png", "pipeworks_filter_top.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor2_on}},
	frames_can_connect=function(pos,dir)
		return dir.y~=1
	end
})

minetest.register_node("technic:frame_motor3",{
	description = "Frame motor 3",
	tiles = {"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "pipeworks_filter_top.png"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor3_on}},
	frames_can_connect=function(pos,dir)
		local node=minetest.env:get_node(pos)
		if node.param2==0 then return dir.z~=1
		elseif node.param2==1 then return dir.x~=1
		elseif node.param2==2 then return dir.z~=-1
		else return dir.x~=-1 end
	end
})

minetest.register_node("technic:frame_motor4",{
	description = "Frame motor 4",
	tiles = {"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "pipeworks_filter_top.png^[transformR180"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor4_on}},
	frames_can_connect=function(pos,dir)
		local node=minetest.env:get_node(pos)
		if node.param2==0 then return dir.z~=1
		elseif node.param2==1 then return dir.x~=1
		elseif node.param2==2 then return dir.z~=-1
		else return dir.x~=-1 end
	end
})

minetest.register_node("technic:frame_motor5",{
	description = "Frame motor 5",
	tiles = {"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "pipeworks_filter_top.png^[transformR90"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor5_on}},
	frames_can_connect=function(pos,dir)
		local node=minetest.env:get_node(pos)
		if node.param2==0 then return dir.z~=1
		elseif node.param2==1 then return dir.x~=1
		elseif node.param2==2 then return dir.z~=-1
		else return dir.x~=-1 end
	end
})

minetest.register_node("technic:frame_motor6",{
	description = "Frame motor 6",
	tiles = {"technic_lv_cable.png", "technic_lv_cable.png", "technic_lv_cable.png",
		"technic_lv_cable.png", "technic_lv_cable.png", "pipeworks_filter_top.png^[transformR270"},
	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,mesecon=2},
	paramtype2 = "facedir",
	mesecons={effector={action_on=frame_motor6_on}},
	frames_can_connect=function(pos,dir)
		local node=minetest.env:get_node(pos)
		if node.param2==0 then return dir.z~=1
		elseif node.param2==1 then return dir.x~=1
		elseif node.param2==2 then return dir.z~=-1
		else return dir.x~=-1 end
	end
})

function add_table(table,toadd)
	local i=1
	while true do
		o=table[i]
		if o==toadd then return end
		if o==nil then break end
		i=i+1
	end
	table[i]=toadd
end

function move_nodes_vect(poslist,vect)
		for _,pos in ipairs(poslist) do
		local npos=addVect(pos,vect)
		if minetest.env:get_node(npos).name~="air" and not(pos_in_list(poslist,npos)) then return end
	end
	nodelist={}
	for _,pos in ipairs(poslist) do
		local node=minetest.env:get_node(pos)
		local meta=minetest.env:get_meta(pos):to_table()
		nodelist[#(nodelist)+1]={pos=pos,node=node,meta=meta}
	end
	objects={}
	for _,pos in ipairs(poslist) do
		for _,object in ipairs(minetest.env:get_objects_inside_radius(pos, 1)) do
			add_table(objects,object)
		end
	end
	for _,obj in ipairs(objects) do
		obj:setpos(addVect(obj:getpos(),vect))
		le=obj:get_luaentity()
		if le and le.name == "pipeworks:tubed_item" then
			le.start_pos=addVect(le.start_pos,vect)
		end
	end
	for _,n in ipairs(nodelist) do
		local npos=addVect(n.pos,vect)
		minetest.env:set_node(npos,n.node)
		local meta=minetest.env:get_meta(npos)
		meta:from_table(n.meta)
		for __,pos in ipairs(poslist) do
			if npos.x==pos.x and npos.y==pos.y and npos.z==pos.z then
				table.remove(poslist, __)
				break
			end
		end
	end
	for __,pos in ipairs(poslist) do
		minetest.env:remove_node(pos)
	end
end

function get_connected_nodes(pos)
	c={pos}
	local nodename=minetest.env:get_node(pos).name
	connected(pos,c,minetest.registered_nodes[nodename].frame_connect_all(pos))
	return c
end

function addVect(pos,vect)
	return {x=pos.x+vect.x,y=pos.y+vect.y,z=pos.z+vect.z}
end

function pos_in_list(l,pos)
	for _,p in ipairs(l) do
		if p.x==pos.x and p.y==pos.y and p.z==pos.z then return true end
	end
	return false
end

function connected(pos,c,adj)
	for _,vect in ipairs(adj) do
		local pos1=addVect(pos,vect)
		local nodename=minetest.env:get_node(pos1).name
		if not(pos_in_list(c,pos1)) and nodename~="air" and
		(minetest.registered_nodes[nodename].frames_can_connect==nil or
		minetest.registered_nodes[nodename].frames_can_connect(pos1,vect)) then
			c[#(c)+1]=pos1
			if minetest.registered_nodes[nodename].frame==1 then
				local adj=minetest.registered_nodes[nodename].frame_connect_all(pos1)
				connected(pos1,c,adj)
			end
		end
	end
end