AsteroidsTV

@asteroids

https://asteroids.gamely.com.br

Precondition

require math math.random i18n

Author

RodrigoDornelles

Version

1.0.0

Brief

similar to the original but with lasers because televisions may have limited hardware.

Game FSM

Source Code

local function i18n(std, game)
    return {
        ['pt-BR'] = {
            ['lifes:'] = 'vidas:',
            ['Continue'] = 'Continuar',
            ['New Game'] = 'Novo Jogo',
            ['Dificulty'] = 'Dificuldade',
            ['Invincibility'] = 'Imortabilidade',
            ['Object Limit'] = 'Limitador',
            ['Graphics'] = 'Graficos',
            ['fast'] = 'rapido',
            ['pretty'] = 'bonito',
            ['Language'] = 'Idioma',
            ['Credits'] = 'Creditos',
            ['Exit'] = 'Sair'
        }
    }
end
 
local function draw_logo(std, game, height, anim)
    anim = anim or 0
    std.text.font_size(32)
    std.draw.color(std.color.white)
    local s1 = std.text.mensure('AsteroidsTv')
    local s2 = std.text.mensure('Tv')
    std.text.print(game.width/2 - s1/2, height + anim, 'Asteroids')
    std.draw.color(std.color.red)
    std.text.print(game.width/2 + s1/2 - s2, height - anim, 'Tv')
    return s1
end
 
local function intersect_line_circle(x1, y1, x2, y2, h, k, raio)
    local m = (y2 - y1) / (x2 - x1)
    local c = y1 - m * x1
    local A = 1 + m^2
    local B = 2 * (m * c - m * k - h)
    local C = h^2 + k^2 + c^2 - 2 * c * k - raio^2
    local discriminante = B^2 - 4 * A * C
    return discriminante >= 0
end
 
local function asteroid_fragments(game, size, level)
    -- level 1,2,3
    if size == game.asteroid_small_mini then return 0, -1, 50 end
    if size == game.asteroid_small_size and level <=3 then return 0, -1, 15 end
    if size == game.asteroid_mid_size and level <= 3 then return 2, game.asteroid_small_size, 10 end                
    if size == game.asteroid_large_size and level <= 3 then return 1, game.asteroid_mid_size, 5 end
    -- level 4,5,6
    if size == game.asteroid_small_size and level <= 6 then return 1, game.asteroid_mini_size, 20 end
    if size == game.asteroid_mid_size and level <= 6 then return 2, game.asteroid_small_size, 15 end
    if size == game.asteroid_large_size and level <= 6 then return 1, game.asteroid_mid_size, 10 end
    -- level 7,8,9
    if size == game.asteroid_small_size and level <= 9 then return 1, game.asteroid_mini_size, 25 end
    if size ==  game.asteroid_mid_size and level <= 9 then return 3, game.asteroid_small_size, 20 end
    if size == game.asteroid_large_size and level <= 9 then return 1,  game.asteroid_mid_size, 15 end
    -- level 10... all asteroids
    if size == game.asteroid_small_size then return 1, game.asteroid_mini_size, 40 end
    if size == game.asteroid_mid_size then return 3, game.asteroid_small_size, 30 end
    if size == game.asteroid_large_size then return 2, game.asteroid_mid_size, 20 end
    return 0, -1, 0
end
 
local function asteroid_nest(std, game, x, y, id)
    local index = 1
    while index < #game.asteroid_size do
        if index ~= id  and game.asteroid_size[index] ~= -1 then
            local size = game.asteroid_size[index] / 2
            local distance = std.math.dis(x, y, game.asteroid_pos_x[index] + size, game.asteroid_pos_y[index] + size)
            if distance <= size then
                return true
            end
        end
        index = index + 1
    end
    return false
end
 
local function asteroids_rain(std, game)
    local index = 1
    local attemps = 1
    local n1 = 0.5 * std.math.min(game.level/3, 1)
    local n2 = 1.0 * std.math.min(game.level/3, 1)
    local n3 = 2.0 * std.math.min(game.level/3, 1)
    local n4 = 2.5 * std.math.min(game.level/3, 1)
    local hspeed = {-n1, 0, 0, 0, 0, 0, n1}
    local vspeed = {-n4, -n3, -n2, n2, n3, n4}
    local middle_left = game.width/4
    local middle_right = game.width/4 * 3
 
    while index <= game.asteroids_max and index <= 10 do
        repeat
            local success = true
            attemps = attemps + 1
            game.asteroid_size[index] = game.asteroid_large_size
            game.asteroid_pos_x[index] = std.math.random(1, game.width)
            game.asteroid_pos_y[index] = std.math.random(1, game.height)
            game.asteroid_spd_x[index] = hspeed[std.math.random(1, #hspeed)]
            game.asteroid_spd_y[index] = vspeed[std.math.random(1, #vspeed)]
 
            if game.asteroid_pos_x[index] > middle_left and game.asteroid_pos_x[index] < middle_right then
                success = false
            end
 
            if asteroid_nest(std, game, game.asteroid_pos_x[index], game.asteroid_pos_x[index], index) then
                success = false
            end
 
            if attemps > 100 then
                success = true
            end
        until success
        index = index + 1
    end
end
 
local function asteroid_destroy(std, game, id)
    local index = 1
    local hspeed = {-1, 1}
    local vspeed = {-2, -1, 1, 2}
    local asteroids = #game.asteroid_size
    local original_size = game.asteroid_size[id]
    local fragments, size, score = asteroid_fragments(game, original_size, game.level)
    
    game.asteroid_size[id] = -1
 
    while index <= fragments and (game.asteroids_count + index) <= (game.asteroids_max + 1) do
        game.asteroid_size[asteroids + index] = size
        game.asteroid_pos_x[asteroids + index] = game.asteroid_pos_x[id]
        game.asteroid_pos_y[asteroids + index] = game.asteroid_pos_y[id]
        game.asteroid_spd_x[asteroids + index] = hspeed[std.math.random(1, #hspeed)] * std.math.min(game.level/5, 1)
        game.asteroid_spd_y[asteroids + index] = vspeed[std.math.random(1, #vspeed)] * std.math.min(game.level/5, 1)
        index = index + 1
    end
 
    return score
end
 
local function init(std, game)
    -- game
    game.boost = 0.12
    game.speed_max = 5
    game.asteroids_count = 0
    -- configs
    game.state = game.state or 1
    game.lifes = game.lifes or 3
    game.level = game.level or 1
    game.score = game.score or 0
    game.imortal = game.imortal or 0
    game.highscore = game.highscore or 0
    game.asteroids_max = game.asteroids_max or 60
    game.graphics_fastest = game.graphics_fastest or 0
    -- player
    game.player_pos_x = game.width/2
    game.player_pos_y = game.height/2
    game.player_spd_x = 0
    game.player_spd_y = 0
    game.player_angle = 0
    game.player_last_teleport = 0
    -- cannon
    game.laser_enabled = false
    game.laser_pos_x1 = 0
    game.laser_pos_y1 = 0
    game.laser_pos_x2 = 0
    game.laser_pos_y2 = 0
    game.laser_last_fire = 0
    game.laser_time_fire = 50
    game.laser_time_recharge = 300
    game.laser_distance_fire = 300
    -- asteroids
    game.asteroid_pos_x = {}
    game.asteroid_pos_y = {}
    game.asteroid_spd_x = {}
    game.asteroid_spd_y = {}
    game.asteroid_size = {}
    -- polys
    game.asteroid_large = {27, 0, 27, 15, 15, 12, 0, 30, 18, 39, 9, 48, 15, 60, 30, 66, 48, 66, 57, 57, 60, 51, 66, 42, 66, 33, 54, 12}
    game.asteroid_mid = {6, 0, 0, 21, 9, 33, 9, 48, 24, 51, 36, 45, 48, 42, 36, 12, 48, 3, 18, 0}
    game.asteroid_small = {3, 0, 0, 3, 3, 9, 3, 12, 0, 18, 6, 21, 12, 21, 18, 18, 21, 15, 21, 3, 12, 3, 9, 6}
    game.asteroid_mini = {6, 0, 6, 6, 0, 6, 0, 12, 3, 18, 6, 18, 6, 15, 15, 15, 18, 9, 12, 6, 12, 0}
    game.spaceship = {-2,3, 0,-2, 2,3}
    -- sizes
    game.asteroid_large_size = std.math.max(game.asteroid_large)
    game.asteroid_mid_size = std.math.max(game.asteroid_mid)
    game.asteroid_small_size = std.math.max(game.asteroid_small)
    game.asteroid_mini_size = std.math.max(game.asteroid_mini)
    -- menu
    game.menu = 2
    game.menu_time = 0
    -- start
    asteroids_rain(std, game)
end
 
local function loop(std, game)
    if game.state == 1 then
        local keyh = std.key.axis.x + std.key.axis.a 
        if std.key.axis.y ~= 0 and std.milis > game.menu_time + 250 then
            game.menu = std.math.clamp(game.menu + std.key.axis.y, game.player_pos_x == (game.width/2) and 2 or 1, 9)
            game.menu_time = std.milis
        end
        if keyh ~= 0 and std.milis > game.menu_time + 100 then
            game.menu_time = std.milis
            if game.menu == 1 then
                game.state = 4
            elseif game.menu == 2 then
                std.app.reset()
                game.state = 4
                game.score = 0
            elseif game.menu == 3 then
                game.level = std.math.clamp2(game.level + keyh, 1, 99)
            elseif game.menu == 4 then
                game.imortal = std.math.clamp(game.imortal + keyh, 0, 1)
            elseif game.menu == 5 then
                game.asteroids_max = std.math.clamp2(game.asteroids_max + keyh, 5, 60)
            elseif game.menu == 6 then
                game.graphics_fastest = std.math.clamp(game.graphics_fastest + keyh, 0, 1)
                game.fps_max = 100
            elseif game.menu == 7 then
                std.i18n.next()
            elseif game.menu == 8 then
                game.state = 2
            elseif game.menu == 9 then
                std.app.exit()
            end
        end
        return
    elseif game.state == 2 and (std.key.press.d or std.key.press.menu) then
        game.menu_time = std.milis
        game.state = 1
        return
    end
    -- enter in the menu
    if std.key.press.d or std.key.press.menu then
        game.state = 1
    end
    -- player move
    game.player_angle = (game.player_angle + (std.key.axis.x * 0.1)) % (std.math.pi * 2)
    game.player_pos_x = game.player_pos_x + (game.player_spd_x/16 * std.delta)
    game.player_pos_y = game.player_pos_y + (game.player_spd_y/16 * std.delta)
    if not std.key.press.up and (std.math.abs(game.player_spd_x) + std.math.abs(game.player_spd_y)) < 0.45 then
        game.player_spd_x = 0
        game.player_spd_y = 0
    end
    if std.key.press.up then
        game.player_spd_x = game.player_spd_x + (game.boost * std.math.cos(game.player_angle - std.math.pi/2))
        game.player_spd_y = game.player_spd_y + (game.boost * std.math.sin(game.player_angle - std.math.pi/2))
        local max_spd_x = std.math.abs(game.speed_max * std.math.cos(game.player_angle - std.math.pi/2))
        local max_spd_y = std.math.abs(game.speed_max * std.math.sin(game.player_angle - std.math.pi/2))
        game.player_spd_x = std.math.clamp(game.player_spd_x, -max_spd_x, max_spd_x) 
        game.player_spd_y = std.math.clamp(game.player_spd_y, -max_spd_y, max_spd_y)
    end
    if game.player_pos_y < 3 then
        game.player_pos_y = game.height
    end
    if game.player_pos_x < 3 then
        game.player_pos_x = game.width
    end
    if game.player_pos_y > game.height then
        game.player_pos_y = 3
    end
    if game.player_pos_x > game.width then
        game.player_pos_x = 3
    end
    -- player teleport
    if std.key.press.down and std.milis > game.player_last_teleport + 1000 then
        game.player_last_teleport = std.milis
        game.laser_pos_x1 = game.player_pos_x
        game.laser_pos_y1 = game.player_pos_y 
        game.player_spd_x = 0
        game.player_spd_y = 0
        repeat
            game.player_pos_x = std.math.random(1, game.width)
            game.player_pos_y = std.math.random(1, game.height)
        until not asteroid_nest(std, game, game.player_pos_x, game.player_pos_y, -1)
    end
    -- player shoot
    if not game.laser_enabled and game.state == 4 and std.key.press.a then
        local index = 1
        local asteroids = #game.asteroid_size
        local sin = std.math.cos(game.player_angle - std.math.pi/2)
        local cos = std.math.sin(game.player_angle - std.math.pi/2)
        local laser_fake_x = game.player_pos_x - (game.laser_distance_fire * sin)
        local laser_fake_y = game.player_pos_y - (game.laser_distance_fire * cos)
        game.laser_pos_x2 = game.player_pos_x + (game.laser_distance_fire * sin)
        game.laser_pos_y2 = game.player_pos_y + (game.laser_distance_fire * cos)
        game.laser_pos_x1 = game.player_pos_x + (12 * sin)
        game.laser_pos_y1 = game.player_pos_y + (12 * cos)
        game.laser_last_fire = std.milis
        game.laser_enabled = true
        while index <= asteroids do
            if game.asteroid_size[index] ~= -1 then
                local size = game.asteroid_size[index]/2
                local x = game.asteroid_pos_x[index] + size
                local y = game.asteroid_pos_y[index] + size
                local dis_p1 = std.math.dis(game.laser_pos_x1, game.laser_pos_y1, x,y)
                local dis_p2 = std.math.dis(game.laser_pos_x2, game.laser_pos_y2, x,y)
                local dis_fake = std.math.dis(laser_fake_x, laser_fake_y, x,y)
                local intersect = intersect_line_circle(game.laser_pos_x1, game.laser_pos_y1, game.laser_pos_x2, game.laser_pos_y2, x, y, size*2)
                if intersect and dis_p2 < dis_fake and dis_p1 < game.laser_distance_fire then
                    game.score = game.score + asteroid_destroy(std, game, index)
                end
            end
            index = index + 1
        end
    end
    if game.laser_enabled and std.milis > game.laser_last_fire + game.laser_time_recharge then
        game.laser_enabled = false
    end
    -- player death
    if game.imortal ~= 1 and game.state == 4 and asteroid_nest(std, game, game.player_pos_x, game.player_pos_y, -1) then
        game.menu_time = std.milis
        game.lifes = game.lifes - 1
        game.state = 5
    end
    -- asteroids move
    local index = 1
    game.asteroids_count = 0
    while index <= #game.asteroid_size do
        if game.asteroid_size[index] ~= -1 then
            game.asteroids_count = game.asteroids_count + 1
            game.asteroid_pos_x[index] = game.asteroid_pos_x[index] + game.asteroid_spd_x[index]
            game.asteroid_pos_y[index] = game.asteroid_pos_y[index] + game.asteroid_spd_y[index]
            if game.asteroid_pos_y[index] < 1 then
                game.asteroid_pos_y[index] = game.height
            end
            if game.asteroid_pos_x[index] < 1 then
                game.asteroid_pos_x[index] = game.width
            end
            if game.asteroid_pos_y[index] > game.height then
                game.asteroid_pos_y[index] = 1
            end
            if game.asteroid_pos_x[index] > game.width then
                game.asteroid_pos_x[index] = 1
            end
        end
        index = index + 1
    end
    -- next level
    if game.state == 4 and game.asteroids_count == 0 then
        game.menu_time = std.milis
        game.state = 6
    end
    if game.state == 6 and std.milis > game.menu_time + 3000 then
        std.app.reset()
        game.level = game.level + 1
        game.state = 4
    end
    -- restart 
    if game.state == 5 and std.milis > game.menu_time + 3000 then
        std.app.reset()
        game.state = 4
        if game.lifes == 0 then
            game.score = 0
            game.lifes = 3
            game.level = 1
        end
    end
end
 
local function draw(std, game)
    local death_anim = game.state == 5 and std.milis < game.menu_time + 50 
    std.draw.clear(death_anim and std.color.white or std.color.black)
    local s = 0
    if game.state == 1 then
        local s2 = 0
        local h = game.height/16
        local hmenu = (h*(4+game.menu)) + 24
        local language = std.i18n.get_language()
        local graphics = game.graphics_fastest == 1 and 'fast' or 'pretty'
        local s = draw_logo(std, game, h*2)
        std.text.font_size(16)
        std.draw.color(std.color.white)
        if game.player_pos_x ~= (game.width/2) then
            std.text.print(game.width/2 - s, h*5, 'Continue')
        end
        std.text.print(game.width/2 - s, h*6, 'New Game')
        std.text.print(game.width/2 - s, h*7, 'Dificulty')
        std.text.print(game.width/2 - s, h*8, 'Invincibility')
        std.text.print(game.width/2 - s, h*9, 'Object Limit')
        std.text.print(game.width/2 - s, h*10, 'Graphics')
        std.text.print(game.width/2 - s, h*11, 'Language')
        std.text.print(game.width/2 - s, h*12, 'Credits')
        std.text.print(game.width/2 - s, h*13, 'Exit')
        std.draw.line(game.width/2 - s, hmenu, game.width/2 + s, hmenu)
        std.draw.color(std.color.red)
        std.text.print_ex(game.width/2 + s, h*7, game.level, -1)
        std.text.print_ex(game.width/2 + s, h*8, game.imortal, -1)
        std.text.print_ex(game.width/2 + s, h*9, game.asteroids_max, -1)
        std.text.print_ex(game.width/2 + s, h*10, graphics, -1)
        std.text.print_ex(game.width/2 + s, h*11, language, -1)
        return
    elseif game.state == 2 then
        local height = game.height/4
        local anim = std.math.cos(std.milis/100) * 5
        draw_logo(std, game, height, anim) 
        std.text.font_size(16)
        std.draw.color(std.color.white)
        std.text.print_ex(game.width/2 + anim, height*2, 'Rodrigo Dornelles', 0)
        return
    end
    -- draw asteroids
    std.draw.color(std.color.white)
    local index = 1
    while index <= #game.asteroid_size do
        if game.asteroid_size[index] ~= -1 then
            if game.graphics_fastest == 1 then
                local s = game.asteroid_size[index]
                std.draw.rect(1, game.asteroid_pos_x[index], game.asteroid_pos_y[index], s, s)
            elseif game.asteroid_size[index] == game.asteroid_large_size then
                std.draw.poly(1, game.asteroid_large, game.asteroid_pos_x[index], game.asteroid_pos_y[index])
            elseif game.asteroid_size[index] == game.asteroid_mid_size then
                std.draw.poly(1, game.asteroid_mid, game.asteroid_pos_x[index], game.asteroid_pos_y[index])
            elseif game.asteroid_size[index] == game.asteroid_small_size then
                std.draw.poly(1, game.asteroid_small, game.asteroid_pos_x[index], game.asteroid_pos_y[index])
            else
                std.draw.poly(1, game.asteroid_mini, game.asteroid_pos_x[index], game.asteroid_pos_y[index])
            end
        end
        index = index + 1
    end
    -- draw player
    if game.state ~= 5 then
        -- triangle
        std.draw.color(std.color.yellow)
        std.draw.poly(2, game.spaceship, game.player_pos_x, game.player_pos_y, 3, game.player_angle)
        -- laser bean
        if game.laser_enabled and std.milis < game.laser_last_fire + game.laser_time_fire then
            std.draw.color(std.color.green)
            std.draw.line(game.laser_pos_x1, game.laser_pos_y1, game.laser_pos_x2, game.laser_pos_y2)
        end
        std.draw.color(std.color.red)
        -- boost
        if std.key.press.up then
            local s = std.math.random(4, 12)
            local sin = std.math.cos(game.player_angle - std.math.pi/2)
            local cos = std.math.sin(game.player_angle - std.math.pi/2)
            local x = game.player_pos_x - (sin * (s + 12)) - (s/2)
            local y = game.player_pos_y - (cos * (s + 12)) - (s/2)
            std.draw.rect(1, x, y, s, s)
        end
        -- teleport
        if std.milis < game.player_last_teleport + 100 then
            std.draw.line(game.laser_pos_x1, game.laser_pos_y1, game.player_pos_x, game.player_pos_y)
        end
    end
    -- draw gui
    local w = game.width/16
    std.draw.color(std.color.black)  
    std.draw.rect(0, 0, 0, game.width, 32)
    std.draw.color(std.color.white)
    s=std.text.print_ex(8, 8, 'lifes:')
    std.text.print(8+s, 8, game.lifes)
    s=std.text.print_ex(w*2, 8, 'level:')
    std.text.print(w*2+s, 8, game.level)
    s=std.text.print_ex(w*4, 8, 'asteroids:')
    std.text.print(w*4+s, 8, game.asteroids_count)
    s=std.text.print_ex(w*9, 8, 'score:')
    std.text.print(w*9+s, 8, game.score)
    s=std.text.print_ex(w*12, 8, 'highscore:')
    std.text.print(w*12+s, 8, game.highscore)
end
 
local function exit(std, game)
    game.highscore = std.math.max(game.score, game.highscore)
    game.asteroid_pos_x = nil
    game.asteroid_pos_y = nil
    game.asteroid_spd_x = nil
    game.asteroid_spd_y = nil
    game.asteroid_size = nil
    game.asteroid_large = nil
    game.asteroid_mid =  nil
    game.asteroid_small = nil
    game.asteroid_mini = nil
end
 
local P = {
    meta={
        id='br.com.gamely.asteroids',
        title='AsteroidsTV',
        author='RodrigoDornelles',
        description='similar to the original but with lasers because televisions may have limited hardware.',
        tizen_package='3202411037732',
        version='1.0.0'
    },
    config = {
        require = 'math math.random i18n'
    },
    callbacks={
        i18n=i18n,
        init=init,
        loop=loop,
        draw=draw,
        exit=exit
    }
}
 
return P;