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------------------------------------------------------------------------------
-- geoelf.lua:
--
-- Functions that draw the corridors for the geoelf layout.
------------------------------------------------------------------------------
geoelf.corridors = {} -- Namespace for corridor drawing functions
crawl_require("dlua/layout/geoelf_directions.lua")
crawl_require("dlua/layout/geoelf_glyphs.lua")
----------------
--
-- Corridor states
--
-- These are the possible states for a possible corridor.
--
geoelf.corridors.INACTIVE = 0
geoelf.corridors.ACTIVE = 1
geoelf.corridors.BLOCKED = 2
----------------------------------------------------------------
--
-- Drawing corridors
--
function geoelf.corridors.draw (e, room_data, corridor_data, index)
if (corridor_data == nil) then
crawl.mpr("Error: No corridor data array")
end
if (corridor_data.count == nil) then
crawl.mpr("Error: Corridor data array does not have count")
end
if (index >= corridor_data.count) then
crawl.mpr("Error: index is past the end of corridor_data")
end
if (corridor_data[index].status ~= geoelf.corridors.ACTIVE ) then
crawl.mpr("Error: Attempting to draw an invalid corridor type")
end
if (room_data == nil) then
crawl.mpr("Error: No room data array")
end
if (room_data.count == nil) then
crawl.mpr("Error: Room data array does not have count")
end
local room1_index = corridor_data[index].room1
local room2_index = corridor_data[index].room2
if (room1_index >= room_data.count or
room2_index >= room_data.count) then
crawl.mpr("Error: Index of room is past the end of room_data")
end
if (room_data[room1_index] == nil or
room_data[room2_index] == nil) then
crawl.mpr("Error: Room referenced by corridor does not exist")
end
local direction = corridor_data[index].direction
-- flip "backwards" corridors
if (geoelf.directions.IS_REVERSE[direction]) then
direction = geoelf.directions.GET_REVERSE[direction]
local temp = room1_index
room1_index = room2_index
room2_index = temp
end
-- I don't think we need fancier corridors or even wider ones
if (direction == geoelf.directions.S) then
geoelf.corridors.draw_s (e, room_data, room1_index, room2_index)
elseif (direction == geoelf.directions.E) then
geoelf.corridors.draw_e (e, room_data, room1_index, room2_index)
elseif (direction == geoelf.directions.SE) then
geoelf.corridors.draw_se(e, room_data, room1_index, room2_index)
elseif (direction == geoelf.directions.SW) then
geoelf.corridors.draw_sw(e, room_data, room1_index, room2_index)
else
crawl.mpr("Error: Trying to draw corridor with invalid direction " ..
direction)
end
end
function geoelf.corridors.draw_s (e, room_data, room1_index, room2_index)
local x1 = room_data[room1_index].center_x
local x2 = room_data[room2_index].center_x
local radius1 = room_data[room1_index].radius
local radius2 = room_data[room2_index].radius
local x = geoelf.corridors.calculate_position(x1, x2,
radius1, radius2)
local start_y = room_data[room1_index].center_y
local end_y = room_data[room2_index].center_y
if (start_y > end_y) then
crawl.mpr("Error: Corridor S is being drawn backwards")
end
--print("Drawing corridor S from y = " .. start_y .. " to " .. end_y ..
-- " x = " .. x)
for y = start_y, end_y do
e.mapgrd[x][y] = geoelf.glyphs.CORRIDOR
end
end
function geoelf.corridors.draw_e (e, room_data, room1_index, room2_index)
local y1 = room_data[room1_index].center_y
local y2 = room_data[room2_index].center_y
local radius1 = room_data[room1_index].radius
local radius2 = room_data[room2_index].radius
local y = geoelf.corridors.calculate_position(y1, y2,
radius1, radius2)
local start_x = room_data[room1_index].center_x
local end_x = room_data[room2_index].center_x
if (start_x > end_x) then
crawl.mpr("Error: Corridor E is being drawn backwards")
end
--print("Drawing corridor E from x = " .. start_x .. " to " .. end_x ..
-- " y = " .. y)
for x = start_x, end_x do
e.mapgrd[x][y] = geoelf.glyphs.CORRIDOR
end
end
function geoelf.corridors.draw_se (e, room_data, room1_index, room2_index)
local x_minus_y1 = room_data[room1_index].center_x -
room_data[room1_index].center_y
local x_minus_y2 = room_data[room2_index].center_x -
room_data[room2_index].center_y
local radius1 = math.floor(room_data[room1_index].radius * 3/4)
local radius2 = math.floor(room_data[room2_index].radius * 3/4)
local x_minus_y = geoelf.corridors.calculate_position(x_minus_y1, x_minus_y2,
radius1, radius2)
local start_y = room_data[room1_index].center_y
local end_y = room_data[room2_index].center_y
if (start_y > end_y) then
crawl.mpr("Error: Corridor SE is being drawn backwards")
end
--print("Drawing corridor SE from y = " .. start_y .. " to " .. end_y ..
-- " x_minus_y = " .. x_minus_y)
for y = start_y, end_y do
e.mapgrd[x_minus_y + y][y] = geoelf.glyphs.CORRIDOR
end
end
function geoelf.corridors.draw_sw (e, room_data, room1_index, room2_index)
local x_plus_y1 = room_data[room1_index].center_x +
room_data[room1_index].center_y
local x_plus_y2 = room_data[room2_index].center_x +
room_data[room2_index].center_y
local radius1 = math.floor(room_data[room1_index].radius * 3/4)
local radius2 = math.floor(room_data[room2_index].radius * 3/4)
local x_plus_y = geoelf.corridors.calculate_position(x_plus_y1, x_plus_y2,
radius1, radius2)
local start_y = room_data[room1_index].center_y
local end_y = room_data[room2_index].center_y
if (start_y > end_y) then
crawl.mpr("Error: Corridor SW is being drawn backwards")
end
--print("Drawing corridor SW from y = " .. start_y .. " to " .. end_y ..
-- " x_plus_y = " .. x_plus_y)
for y = start_y, end_y do
e.mapgrd[x_plus_y - y][y] = geoelf.glyphs.CORRIDOR
end
end
function geoelf.corridors.calculate_position (pos1, pos2, radius1, radius2)
local pos_min
local pos_max
if (pos1 < pos2) then
pos_min = math.max(pos1, pos2 - radius2)
pos_max = math.min(pos2, pos1 + radius1)
else
pos_min = math.max(pos2, pos1 - radius1)
pos_max = math.min(pos1, pos2 + radius2)
end
if (pos_min < pos_max) then
-- anything in this range is good
return crawl.random_range(pos_min, pos_max)
else
-- if nothing is good, use the middle of the less bad range
return math.floor((pos_min + pos_max) / 2)
end
end
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