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-- Walks down the dungeon to Snake:$ and tests for the existence of the rune.
-- This is a more exhaustive test than rune-gen.lua since it generates all
-- intermediate levels and activates the dungeon connectivity code.
local niters = 500
local current_iter = 0
local branch_entrance_feats = {
{ dgn.fnum("enter_lair"), "Lair:1" },
{ dgn.fnum("enter_snake_pit"), "Snake:1" }
}
local junk_feat_fn = dgn.feature_set_fn("rock_wall", "floor", "stone_wall")
local function thing_exists_fn(thing)
return function()
return test.level_contains_item(thing)
end
end
local function visit_branch_end_from(start, stair_places, final_predicate)
while true do
crawl.mesclr()
crawl.mpr("Visiting (" .. current_iter .. ") " .. start)
debug.goto_place(start)
dgn.reset_level()
debug.generate_level()
local downstairs = { }
for y = 1, dgn.GYM - 2 do
for x = 1, dgn.GXM - 2 do
local dfeat = dgn.grid(x, y)
if not junk_feat_fn(dfeat) then
for _, place in ipairs(stair_places) do
if dfeat == place[1] then
return visit_branch_end_from(place[2], stair_places,
final_predicate)
end
end
if test.is_down_stair(dfeat) then
table.insert(downstairs, dgn.point(x, y))
end
end
end
end
if #downstairs > 0 then
local _, _, branch, depth = string.find(start, "(%w+):(%d+)")
start = branch .. ":" .. (tonumber(depth) + 1)
else
test.map_assert(final_predicate(),
"Place " .. start .. " does not satisfy predicate")
return
end
end
end
for i = 1, niters do
crawl.mpr("Visiting Snake:$ the hard way")
current_iter = i
debug.flush_map_memory()
visit_branch_end_from("D:1",
branch_entrance_feats,
thing_exists_fn("serpentine rune"))
end
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