diff options
Diffstat (limited to 'helpers.lua')
| -rw-r--r-- | helpers.lua | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/helpers.lua b/helpers.lua deleted file mode 100644 index 6a8175f..0000000 --- a/helpers.lua +++ /dev/null @@ -1,249 +0,0 @@ ---advtrains by orwell96, see readme.txt
-local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
-
-advtrains.dir_trans_tbl={
- [0]={x=0, z=1},
- [1]={x=1, z=2},
- [2]={x=1, z=1},
- [3]={x=2, z=1},
- [4]={x=1, z=0},
- [5]={x=2, z=-1},
- [6]={x=1, z=-1},
- [7]={x=1, z=-2},
- [8]={x=0, z=-1},
- [9]={x=-1, z=-2},
- [10]={x=-1, z=-1},
- [11]={x=-2, z=-1},
- [12]={x=-1, z=0},
- [13]={x=-2, z=1},
- [14]={x=-1, z=1},
- [15]={x=-1, z=2},
-}
-
-function advtrains.dirCoordSet(coord, dir)
- local x,z
- if advtrains.dir_trans_tbl[dir] then
- x,z=advtrains.dir_trans_tbl[dir].x, advtrains.dir_trans_tbl[dir].z
- else
- error("advtrains: in helpers.lua/dirCoordSet() given dir="..(dir or "nil"))
- end
- return {x=coord.x+x, y=coord.y, z=coord.z+z}
-end
-function advtrains.dirToCoord(dir)
- return advtrains.dirCoordSet({x=0, y=0, z=0}, dir)
-end
-
-function advtrains.maxN(list, expectstart)
- local n=expectstart or 0
- while list[n] do
- n=n+1
- end
- return n-1
-end
-
-function advtrains.minN(list, expectstart)
- local n=expectstart or 0
- while list[n] do
- n=n-1
- end
- return n+1
-end
-
---vertical_transmit:
---[[
-rely1, rely2 tell to which height the connections are pointed to. 1 means it will go up the next node
-
-]]
-
-function advtrains.conway(midreal, prev, traintype)--in order prev,mid,return
- local mid=advtrains.round_vector_floor_y(midreal)
- local drives_on=advtrains.all_traintypes[traintype].drives_on
-
- if not advtrains.get_rail_info_at(advtrains.round_vector_floor_y(prev), traintype) then
- return nil
- end
-
- local midnode_ok, middir1, middir2, midrely1, midrely2=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(mid), traintype)
- if not midnode_ok then
- return nil
- end
-
- local next, chkdir, chkrely, y_offset
- y_offset=0
- --print("[advtrains] in order mid1,mid2",middir1,middir2)
- --try if it is dir1
- local cor1=advtrains.dirCoordSet(mid, middir2)--<<<<
- if math.floor(cor1.x+0.5)==math.floor(prev.x+0.5) and math.floor(cor1.z+0.5)==math.floor(prev.z+0.5) then--this was previous
- next=advtrains.dirCoordSet(mid, middir1)
- if midrely1>=1 then
- next.y=next.y+1
- --print("[advtrains]found midrely1 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
- y_offset=1
- end
- chkdir=middir1
- chkrely=midrely1
- --print("[advtrains]dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
- end
- --dir2???
- local cor2=advtrains.dirCoordSet(mid, middir1)--<<<<
- if math.floor(cor2.x+0.5)==math.floor(prev.x+0.5) and math.floor(cor2.z+0.5)==math.floor(prev.z+0.5) then
- next=advtrains.dirCoordSet(mid, middir2)--dir2 wird überprüft, alles gut.
- if midrely2>=1 then
- next.y=next.y+1
- --print("[advtrains]found midrely2 to be >=1: next is now "..(next and minetest.pos_to_string(next) or "nil"))
- y_offset=1
- end
- chkdir=middir2
- chkrely=midrely2
- --print("[advtrains] dir2 applied next pos:",minetest.pos_to_string(next),"(chkdir is ",chkdir,")")
- end
- --print("[advtrains]dir applied next pos: "..(next and minetest.pos_to_string(next) or "nil").."(chkdir is "..(chkdir or "nil")..", y-offset "..y_offset..")")
- --is there a next
- if not next then
- --print("[advtrains]in conway: no next rail(nil), returning!")
- return nil
- end
-
- local nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
-
- --is it a rail?
- if(not nextnode_ok) then
- --print("[advtrains]in conway: next "..minetest.pos_to_string(next).." not a rail, trying one node below!")
- next.y=next.y-1
- y_offset=y_offset-1
-
- nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
- if(not nextnode_ok) then
- --print("[advtrains]in conway: one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
- return nil
- end
- end
-
- --is this next rail connecting to the mid?
- if not ( (((nextdir1+8)%16)==chkdir and nextrely1==chkrely-y_offset) or (((nextdir2+8)%16)==chkdir and nextrely2==chkrely-y_offset) ) then
- --print("[advtrains]in conway: next "..minetest.pos_to_string(next).." not connecting, trying one node below!")
- next.y=next.y-1
- y_offset=y_offset-1
-
- nextnode_ok, nextdir1, nextdir2, nextrely1, nextrely2, nextrailheight=advtrains.get_rail_info_at(advtrains.round_vector_floor_y(next), traintype)
- if(not nextnode_ok) then
- --print("[advtrains]in conway: (at connecting if check again) one below "..minetest.pos_to_string(next).." is not a rail either, returning!")
- return nil
- end
- if not ( (((nextdir1+8)%16)==chkdir and nextrely1==chkrely) or (((nextdir2+8)%16)==chkdir and nextrely2==chkrely) ) then
- --print("[advtrains]in conway: one below "..minetest.pos_to_string(next).." rail not connecting, returning!")
- --print("[advtrains] in order mid1,2,next1,2,chkdir "..middir1.." "..middir2.." "..nextdir1.." "..nextdir2.." "..chkdir)
- return nil
- end
- end
-
- --print("[advtrains]conway found rail.")
- return vector.add(advtrains.round_vector_floor_y(next), {x=0, y=nextrailheight, z=0}), chkdir
-end
---TODO use this
-function advtrains.oppd(dir)
- return ((dir+8)%16)
-end
-
-function advtrains.round_vector_floor_y(vec)
- return {x=math.floor(vec.x+0.5), y=math.floor(vec.y), z=math.floor(vec.z+0.5)}
-end
-
-function advtrains.yawToDirection(yaw, conn1, conn2)
- if not conn1 or not conn2 then
- error("given nil to yawToDirection: conn1="..(conn1 or "nil").." conn2="..(conn1 or "nil"))
- end
- local yaw1=math.pi*(conn1/4)
- local yaw2=math.pi*(conn2/4)
- if advtrains.minAngleDiffRad(yaw, yaw1)<advtrains.minAngleDiffRad(yaw, yaw2) then--change to > if weird behavior
- return conn2
- else
- return conn1
- end
-end
-
-function advtrains.minAngleDiffRad(r1, r2)
- local try1=r2-r1
- local try2=(r2+2*math.pi)-r1
- local try3=r2-(r1+2*math.pi)
- if math.min(math.abs(try1), math.abs(try2), math.abs(try3))==math.abs(try1) then
- return try1
- end
- if math.min(math.abs(try1), math.abs(try2), math.abs(try3))==math.abs(try2) then
- return try2
- end
- if math.min(math.abs(try1), math.abs(try2), math.abs(try3))==math.abs(try3) then
- return try3
- end
-end
-function advtrains.dumppath(path)
- if not path then print("dumppath: no path(nil)") return end
- local min=advtrains.minN(path)
- local max=advtrains.maxN(path)
- for i=min, max do print("["..i.."] "..(path[i] and minetest.pos_to_string(path[i]) or "nil")) end
-end
-
-function advtrains.merge_tables(a, ...)
- local new={}
- for _,t in ipairs({a,...}) do
- for k,v in pairs(t) do new[k]=v end
- end
- return new
-end
-function advtrains.yaw_from_3_positions(prev, curr, next)
- local pts=minetest.pos_to_string
- --print("p3 "..pts(prev)..pts(curr)..pts(next))
- local prev2curr=math.atan2((curr.x-prev.x), (prev.z-curr.z))
- local curr2next=math.atan2((next.x-curr.x), (curr.z-next.z))
- --print("y3 "..(prev2curr*360/(2*math.pi)).." "..(curr2next*360/(2*math.pi)))
- return prev2curr+(advtrains.minAngleDiffRad(prev2curr, curr2next)/2)
-end
-function advtrains.get_wagon_yaw(front, first, second, back, pct)
- local pts=minetest.pos_to_string
- --print("p "..pts(front)..pts(first)..pts(second)..pts(back))
- local y2=advtrains.yaw_from_3_positions(second, first, front)
- local y1=advtrains.yaw_from_3_positions(back, second, first)
- --print("y "..(y1*360/(2*math.pi)).." "..(y2*360/(2*math.pi)))
- return y1+advtrains.minAngleDiffRad(y1, y2)*pct
-end
-function advtrains.get_real_index_position(path, index)
- if not path or not index then return end
-
- local first_pos=path[math.floor(index)]
- local second_pos=path[math.floor(index)+1]
-
- if not first_pos or not second_pos then return nil end
-
- local factor=index-math.floor(index)
- local actual_pos={x=first_pos.x-(first_pos.x-second_pos.x)*factor, y=first_pos.y-(first_pos.y-second_pos.y)*factor, z=first_pos.z-(first_pos.z-second_pos.z)*factor,}
- return actual_pos
-end
-function advtrains.pos_median(pos1, pos2)
- return {x=pos1.x-(pos1.x-pos2.x)*0.5, y=pos1.y-(pos1.y-pos2.y)*0.5, z=pos1.z-(pos1.z-pos2.z)*0.5}
-end
-function advtrains.abs_ceil(i)
- return math.ceil(math.abs(i))*math.sign(i)
-end
-
-function advtrains.serialize_inventory(inv)
- local ser={}
- local liszts=inv:get_lists()
- for lisztname, liszt in pairs(liszts) do
- ser[lisztname]={}
- for idx, item in ipairs(liszt) do
- local istring=item:to_string()
- if istring~="" then
- ser[lisztname][idx]=istring
- end
- end
- end
- return minetest.serialize(ser)
-end
-function advtrains.deserialize_inventory(sers, inv)
- local ser=minetest.deserialize(sers)
- if ser then
- inv:set_lists(ser)
- return true
- end
- return false
-end
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