hexyz/main.lua

math.randomseed(os.time())
math.random()
math.random()
math.random()


-- Globals
WIN = am.window{
    width       = 1920,
    height      = 1080,
    title       = "hexyz",
    highdpi     = true,
    letterbox   = true
}

STATE = {} -- @TODO move state in here

-- assets and/or trivial code
require "color"
require "sound"
require "texture"

require "src/entity"
require "src/extra"
require "src/geometry"
require "src/hexyz"
require "src/grid"
require "src/gui"
require "src/mob"
require "src/projectile"
require "src/tower"


OFF_SCREEN = vec2(WIN.width * 2) -- arbitrary pixel position that is garunteed to be off screen
PERF_STATS = false               -- result of am.perf_stats() -- should be called every frame

WORLD = false -- root scene node of everything considered to be in the game world
              -- aka non gui stuff

HEX_CURSOR = false

TIME           = 0                  -- runtime of the current game in seconds (not whole program runtime)
SCORE          = 0                  -- score of the player
STARTING_MONEY = 50
MONEY          = STARTING_MONEY     -- available resources
MOUSE          = false              -- position of the mouse at the start of every frame, if an action is tracking it

-- global audio settings
MUSIC_VOLUME = 0.1
SFX_VOLUME   = 0.1

-- game stuff
SELECTED_TOWER_TYPE = 1

-- top right display types
local TRDTS = {
    NOTHING        = -1,
    CENTERED_EVENQ = 0,
    EVENQ          = 1,
    HEX            = 2,
    PLATFORM       = 3,
    PERF           = 4,
    SEED           = 5,
    TILE           = 6
}
local TRDT = TRDTS.SEED

local function select_hex(hex)
    local tower = tower_on_hex(hex)
    local tile = HEX_MAP.get(hex.x, hex.y)
end

local function can_do_build(hex, tile, tower_type)
    return can_afford_tower(MONEY, tower_type) and tower_is_buildable_on(hex, tile, tower_type)
end

local function game_action(scene)
    --if SCORE < 0 then game_end() end

    TIME       = TIME + am.delta_time
    SCORE      = SCORE + am.delta_time
    MOUSE      = WIN:mouse_position()
    PERF_STATS = am.perf_stats()

    local hex            = pixel_to_hex(MOUSE - WORLDSPACE_COORDINATE_OFFSET)
    local rounded_mouse  = hex_to_pixel(hex) + WORLDSPACE_COORDINATE_OFFSET
    local evenq          = hex_to_evenq(hex)
    local centered_evenq = evenq{ y = -evenq.y } - vec2(math.floor(HEX_GRID_WIDTH/2)
                                                      , math.floor(HEX_GRID_HEIGHT/2))
    local tile = HEX_MAP.get(hex.x, hex.y)
    local hot = evenq_is_interactable(evenq{ y = -evenq.y })

    do_entity_updates()
    do_mob_spawning()
    do_gui_updates()

    if WIN:mouse_pressed"left" then
        if hot and can_do_build(hex, tile, SELECTED_TOWER_TYPE) then
            build_tower(hex, SELECTED_TOWER_TYPE)
        end
    end

    --[[
    if WIN:mouse_pressed"middle" then
        WORLD"scale".scale2d = vec2(1)
    else
        local mwd = vec2(WIN:mouse_wheel_delta().y / 500)
        WORLD"scale".scale2d = WORLD"scale".scale2d + mwd
        WORLD"scale".scale2d = WORLD"scale".scale2d + mwd
    end
    ]]

    if WIN:key_pressed"escape" then
        WIN.scene"game".paused = true
        WIN.scene:append(am.group{
            am.rect(WIN.left, WIN.bottom, WIN.right, WIN.top, COLORS.TRANSPARENT),
            am.scale(3) ^ am.text("Paused.\nEscape to Resume", COLORS.BLACK)
        }:tag"pause_menu")
        WIN.scene:action(function()
            if WIN:key_pressed"escape" then
                WIN.scene:remove"pause_menu"
                WIN.scene"game".paused = false
                return true
            end
        end)

    elseif WIN:key_pressed"f1" then
        TRDT = (TRDT + 1) % #table.keys(TRDTS)

    elseif WIN:key_pressed"f2" then
        WORLD"flow_field".hidden = not WORLD"flow_field".hidden

    elseif WIN:key_pressed"tab" then
        local num_of_types = #table.keys(TOWER_TYPE)
        if WIN:key_down"lshift" then
            select_tower_type((SELECTED_TOWER_TYPE + num_of_types - 2) % num_of_types + 1)
        else
            select_tower_type((SELECTED_TOWER_TYPE) % num_of_types + 1)
        end

    elseif WIN:key_pressed"1" then select_tower_type(TOWER_TYPE.REDEYE)
    elseif WIN:key_pressed"2" then select_tower_type(2)
    elseif WIN:key_pressed"3" then select_tower_type(3)
    elseif WIN:key_pressed"4" then select_tower_type(4)
    elseif WIN:key_pressed"5" then select_tower_type(5)
    elseif WIN:key_pressed"6" then select_tower_type(6)
    elseif WIN:key_pressed"7" then select_tower_type(7)
    elseif WIN:key_pressed"8" then select_tower_type(8)
    elseif WIN:key_pressed"9" then select_tower_type(9)
    elseif WIN:key_pressed"0" then select_tower_type(10)
    elseif WIN:key_pressed"minus" then select_tower_type(11)
    elseif WIN:key_pressed"equals" then select_tower_type(12)
    end

    if tile and hot then
        HEX_CURSOR.center = rounded_mouse
    else
        HEX_CURSOR.center = OFF_SCREEN
    end

    WIN.scene"score".text = string.format("SCORE: %.2f", SCORE)
    WIN.scene"money".text = string.format("MONEY: %d", MONEY)

    do
        local str = ""
        if TRDT == TRDTS.CENTERED_EVENQ then
            str = centered_evenq.x .. "," .. centered_evenq.y .. " (cevenq)"

        elseif TRDT == TRDTS.EVENQ then
            str = evenq.x .. "," .. evenq.y .. " (evenq)"

        elseif TRDT == TRDTS.HEX then
            str = hex.x .. "," .. hex.y .. " (hex)"

        elseif TRDT == TRDTS.PLATFORM then
            str = string.format("%s %s lang %s", am.platform, am.version, am.language())

        elseif TRDT == TRDTS.PERF then
            str = table.tostring(PERF_STATS)

        elseif TRDT == TRDTS.SEED then
            str = "SEED: " .. HEX_MAP.seed

        elseif TRDT == TRDTS.TILE then
            str = table.tostring(HEX_MAP.get(hex.x, hex.y))
        end
        WIN.scene"coords".text = str
    end

    do_day_night_cycle()
end

function do_day_night_cycle()
    local slow = 100
    local tstep = (math.sin(TIME / 100) + 1) / PERF_STATS.avg_fps
    WORLD"negative_mask".color = vec4(tstep){a=1}
end

function game_end()
    -- de-initialize stuff
    delete_all_entities()
    TIME = 0
    SCORE = 0
    MONEY = STARTING_MONEY
    WORLD = false

    WIN.scene = am.group(am.scale(1) ^ game_scene())
end

function update_score(diff) SCORE = SCORE + diff end
function update_money(diff) MONEY = MONEY + diff end

function draw_hex_cursor(map, color)
    local group = am.group()
    for _,h in pairs(map) do
        group:append(am.circle(hex_to_pixel(h), HEX_SIZE, color, 6))
    end
    return group
end

function game_scene()
    local score = am.translate(WIN.left + 10, WIN.top - 20) ^ am.text("", "left"):tag"score"
    local money = am.translate(WIN.left + 10, WIN.top - 40) ^ am.text("", "left"):tag"money"
    local coords = am.translate(WIN.right - 10, WIN.top - 20) ^ am.text("", "right", "top"):tag"coords"
    HEX_CURSOR = am.circle(OFF_SCREEN, HEX_SIZE, COLORS.TRANSPARENT, 6):tag"hex_cursor"

    local curtain = am.rect(WIN.left, WIN.bottom, WIN.right, WIN.top, COLORS.TRUE_BLACK)
    curtain:action(coroutine.create(function()
        am.wait(am.tween(curtain, 3, { color = vec4(0) }, am.ease.out(am.ease.hyperbola)))
        WIN.scene:remove(curtain)
    end))

    -- 2227
    HEX_MAP, WORLD = random_map()

    local scene = am.group{
        WORLD,
        curtain,
        HEX_CURSOR,
        toolbelt(),
        score,
        money,
        coords,
    }:tag"game"

    scene:action(game_action)
    --scene:action(am.play(SOUNDS.TRACK1))

    return scene
end

WIN.scene = am.group(game_scene())
noglobals()