diff options
Diffstat (limited to 'advtrains/path.lua')
| -rw-r--r-- | advtrains/path.lua | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/advtrains/path.lua b/advtrains/path.lua index 43add95..a98a1b5 100644 --- a/advtrains/path.lua +++ b/advtrains/path.lua @@ -183,6 +183,13 @@ function advtrains.path_get(train, index) train.path_dist[train.path_ext_b] = vector.distance(pos, adj_pos) end + if index < train.path_req_b then + train.path_req_b = index + end + if index > train.path_req_f then + train.path_req_f = index + end + return train.path[index], (index<=train.path_trk_f and index>=train.path_trk_b) end @@ -233,3 +240,34 @@ function advtrains.path_get_index_by_offset(train, index, offset) end return index end + +local PATH_CLEAR_KEEP = 2 + +function advtrains.path_clear_unused(train) + for i = train.path_ext_b, train.path_req_b - PATH_CLEAR_KEEP do + train.path[i] = nil + train.path_dist[i] = nil + train.path_cp[i] = nil + train.path_cn[i] = nil + train.path_dir[i] = nil + end + for i = train.path_req_f + PATH_CLEAR_KEEP, train.path_ext_f do + train.path[i] = nil + train.path_dist[i-1] = nil + train.path_cp[i] = nil + train.path_cn[i] = nil + train.path_dir[i+1] = nil + end + train.path_req_f = math.ceil(train.index) + train.path_req_b = math.floor(train.end_index or train.index) +end + +function advtrains.path_lookup(train, pos) + local cp = advtrains.round_vector_floor_y(pos) + for i = train.path_ext_b, train.path_ext_f do + if vector.equals(advtrains.round_vector_floor_y(train.path[i]), cp) then + return i + end + end + return nil +end |