day night cycle

main.lua

@@ -85,7 +85,7 @@ local function game_action(scene)
 
     if WIN:mouse_pressed"left" then
         if hot and is_buildable(hex, tile, nil) then
-            make_and_register_tower(hex, SELECTED_TOWER_TYPE)
+            build_tower(hex, SELECTED_TOWER_TYPE)
         end
     end
 
@@ -141,6 +141,13 @@ local function game_action(scene)
         end
         WIN.scene"coords".text = str
     end
+
+    do_day_night_cycle()
+end
+
+function do_day_night_cycle()
+    local tstep = (math.sin(TIME) / PERF_STATS.avg_fps + 1)/8
+    WORLD"negative_mask".color = vec4(tstep)
 end
 
 function game_end()

sound.lua

@@ -4,6 +4,7 @@ SOUNDS = {
     EXPLOSION1      = 49179102, -- this slowed sounds metal as fuck
     EXPLOSION2      = 19725402,
     EXPLOSION3      = 69338002,
+    EXPLOSION4      = 92224102,
     HIT1            = 25811004,
     LASER1          = 79859301,
     LASER2          = 86914201,

src/grid.lua

@@ -70,6 +70,7 @@ end
 
 function grid_cost(map, from, to)
     local t1, t2 = map.get(from.x, from.y), map.get(to.x, to.y)
+    --local base_cost = math.abs(t1.elevation) * 10
     return math.abs(10 * math.abs(t1.elevation)^0.5 - 10 * math.abs(t2.elevation)^0.5)
 end
 
@@ -112,6 +113,13 @@ function random_map(seed)
                 node = node
             })
 
+            getmetatable(map).__index.neighbours = function(hex)
+                return table.filter(hex_neighbours(hex), function(_hex)
+                    local tile = map.get(_hex.x, _hex.y)
+                    return tile and tile.elevation > -0.5 and tile.elevation <= 0.5
+                end)
+            end
+
             world:append(node)
         end
     end

src/mob.lua

@@ -33,7 +33,7 @@ end
 -- check if a the tile at |hex| is passable by |mob|
 function mob_can_pass_through(mob, hex)
     local tile = HEX_MAP.get(hex.x, hex.y)
-    return tile and tile.elevation < 0.5 and tile.elevation > -0.5
+    return tile and tile.elevation <= 0.5 and tile.elevation > -0.5
 end
 
 function mob_die(mob, mob_index)
@@ -49,15 +49,6 @@ function do_hit_mob(mob, damage, mob_index)
     end
 end
 
-function check_for_broken_mob_pathing(hex)
-    for _,mob in pairs(MOBS) do
-        --if mob and mob.path[hex.x] and mob.path[hex.x][hex.y] then
-            --mob.path = get_mob_path(mob, HEX_MAP, mob.hex, HEX_GRID_CENTER)
-        --end
-    end
-end
-
-
 -- @TODO performance.
 -- try reducing map size by identifying key nodes (inflection points)
 -- there are performance hits everytime we spawn a mob and it's Astar's fault
@@ -99,11 +90,21 @@ local function mob_update(mob, mob_index)
     end
 
     local frame_target = mob.path[mob.hex.x] and mob.path[mob.hex.x][mob.hex.y]
+    -- frame_target will be false when we are one hex away from the center,
+    -- or nil if something went wrong
+    if frame_target == false then
+        frame_target = { hex = HEX_GRID_CENTER, priority = 0 }
 
-    if frame_target --[[and mob_can_pass_through(mob, frame_target.hex)]] then
-        local factor = 1 + mob.speed * (1/frame_target.priority) / PERF_STATS.avg_fps
-        mob.position = mob.position + math.normalize(hex_to_pixel(frame_target.hex) - mob.position) * factor
+    elseif frame_target == nil then
+        log("bad")
+
+    elseif mob_can_pass_through(mob, frame_target.hex) then
+        -- this is supposed to achieve frame rate independence, but i have no idea if it actually does
+        local rate = 1 + mob.speed * (1/frame_target.priority) / PERF_STATS.avg_fps
+
+        mob.position = mob.position + math.normalize(hex_to_pixel(frame_target.hex) - mob.position) * rate
         mob.node.position2d = mob.position
+
     else
         mob.path = get_mob_path(mob, HEX_MAP, mob.hex, HEX_GRID_CENTER)
     end

src/tower.lua

@@ -1,4 +1,13 @@
 
+--[[
+tower(entity) structure:
+{
+    -- @NOTE these should probably be wrapped in a 'weapon' struct or something, so towers can have multiple weapons
+    range           - number    - distance it can shoot
+    last_shot_time  - number    - timestamp (seconds) of last time it shot
+    target_index    - number    - index of entity it is currently shooting
+}
+--]]
 
 TOWER_TYPE = {
     REDEYE = 1,
@@ -41,17 +50,6 @@ local function make_tower_sprite(tower_type)
     end
 end
 
-
-
---[[
-tower(entity) structure:
-{
-    -- @NOTE these should probably be wrapped in a 'weapon' struct or something, so towers can have multiple weapons
-    range           - number    - distance it can shoot
-    last_shot_time  - number    - timestamp (seconds) of last time it shot
-    target_index    - number    - index of entity it is currently shooting
-}
---]]
 function is_buildable(hex, tile, tower)
     local blocked = #mobs_on_hex(hex) ~= 0
     return not blocked and tile.elevation <= 0.5 and tile.elevation > -0.5
@@ -102,8 +100,12 @@ function make_and_register_tower(hex, tower_type)
 
     -- make this cell impassable
     HEX_MAP[hex.x][hex.y].elevation = 2
-    check_for_broken_mob_pathing(hex)
 
     register_entity(TOWERS, tower)
 end
 
+function build_tower(hex, tower_type)
+    make_and_register_tower(hex, tower_type)
+    WIN.scene:action(am.play(am.sfxr_synth(SOUNDS.EXPLOSION4)))
+end
+