51d89e2594
* simplify some things (no functional changes) * increase default and exploded ball size a bit to be more compliant with the original game (and make beating it on big screens a bit easier) * whitespace cleanups git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23876 a1c6a512-1295-4272-9138-f99709370657
368 lines
12 KiB
Lua
368 lines
12 KiB
Lua
--[[
|
|
__________ __ ___.
|
|
Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
\/ \/ \/ \/ \/
|
|
$Id$
|
|
|
|
Port of Chain Reaction (which is based on Boomshine) to Rockbox in Lua.
|
|
See http://www.yvoschaap.com/chainrxn/ and http://www.k2xl.com/games/boomshine/
|
|
|
|
Copyright (C) 2009 by Maurus Cuelenaere
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
KIND, either express or implied.
|
|
|
|
]]--
|
|
|
|
require "actions"
|
|
|
|
local CYCLETIME = rb.HZ / 50
|
|
local HAS_TOUCHSCREEN = rb.action_get_touchscreen_press ~= nil
|
|
local DEFAULT_BALL_SIZE = rb.LCD_HEIGHT > rb.LCD_WIDTH and rb.LCD_WIDTH / 30
|
|
or rb.LCD_HEIGHT / 30
|
|
local MAX_BALL_SPEED = DEFAULT_BALL_SIZE / 2
|
|
local DEFAULT_FOREGROUND_COLOR = rb.lcd_get_foreground ~= nil
|
|
and rb.lcd_get_foreground()
|
|
or 0
|
|
|
|
local levels = {
|
|
-- {GOAL, TOTAL_BALLS},
|
|
{1, 5},
|
|
{2, 10},
|
|
{4, 15},
|
|
{6, 20},
|
|
{10, 25},
|
|
{15, 30},
|
|
{18, 35},
|
|
{22, 40},
|
|
{30, 45},
|
|
{37, 50},
|
|
{48, 55},
|
|
{55, 60}
|
|
}
|
|
|
|
local Ball = {
|
|
size = DEFAULT_BALL_SIZE,
|
|
exploded = false,
|
|
implosion = false
|
|
}
|
|
|
|
function Ball:new(o)
|
|
if o == nil then
|
|
o = {
|
|
x = math.random(self.size, rb.LCD_WIDTH - self.size),
|
|
y = math.random(self.size, rb.LCD_HEIGHT - self.size),
|
|
color = random_color(),
|
|
up_speed = Ball:generateSpeed(),
|
|
right_speed = Ball:generateSpeed(),
|
|
explosion_size = math.random(2*self.size, 4*self.size),
|
|
life_duration = math.random(rb.HZ, rb.HZ*5)
|
|
}
|
|
end
|
|
|
|
setmetatable(o, self)
|
|
self.__index = self
|
|
return o
|
|
end
|
|
|
|
function Ball:generateSpeed()
|
|
local speed = math.random(-MAX_BALL_SPEED, MAX_BALL_SPEED)
|
|
if speed == 0 then
|
|
speed = 1 -- Make sure all balls move
|
|
end
|
|
|
|
return speed
|
|
end
|
|
|
|
function Ball:draw()
|
|
--[[
|
|
I know these aren't circles, but as there's no current circle
|
|
implementation in Rockbox, rectangles will just do fine (drawing
|
|
circles from within Lua is far too slow).
|
|
]]--
|
|
set_foreground(self.color)
|
|
rb.lcd_fillrect(self.x, self.y, self.size, self.size)
|
|
end
|
|
|
|
function Ball:step()
|
|
if self.exploded then
|
|
if self.implosion and self.size > 0 then
|
|
self.size = self.size - 2
|
|
self.x = self.x + 1 -- We do this because we want to stay centered
|
|
self.y = self.y + 1
|
|
elseif self.size < self.explosion_size then
|
|
self.size = self.size + 2
|
|
self.x = self.x - 1 -- We do this for the same reasons as above
|
|
self.y = self.y - 1
|
|
end
|
|
return
|
|
end
|
|
|
|
self.x = self.x + self.right_speed
|
|
self.y = self.y + self.up_speed
|
|
if (self.x + self.size) >= rb.LCD_WIDTH or self.x <= self.size then
|
|
self.right_speed = self.right_speed * (-1)
|
|
elseif (self.y + self.size) >= rb.LCD_HEIGHT or self.y <= self.size then
|
|
self.up_speed = self.up_speed * (-1)
|
|
end
|
|
end
|
|
|
|
function Ball:checkHit(other)
|
|
local x_dist = math.abs(other.x - self.x)
|
|
local y_dist = math.abs(other.y - self.y)
|
|
local x_size = self.x > other.x and other.size or self.size
|
|
local y_size = self.y > other.y and other.size or self.size
|
|
|
|
if (x_dist <= x_size) and (y_dist <= y_size) then
|
|
assert(not self.exploded)
|
|
self.exploded = true
|
|
self.death_time = rb.current_tick() + self.life_duration
|
|
if not other.exploded then
|
|
other.exploded = true
|
|
other.death_time = rb.current_tick() + other.life_duration
|
|
end
|
|
return true
|
|
end
|
|
|
|
return false
|
|
end
|
|
|
|
local Cursor = {
|
|
size = DEFAULT_BALL_SIZE*2,
|
|
x = rb.LCD_WIDTH/2,
|
|
y = rb.LCD_HEIGHT/2
|
|
}
|
|
|
|
function Cursor:new()
|
|
return self
|
|
end
|
|
|
|
function Cursor:do_action(action)
|
|
if action == rb.actions.ACTION_TOUCHSCREEN and HAS_TOUCHSCREEN then
|
|
_, self.x, self.y = rb.action_get_touchscreen_press()
|
|
return true
|
|
elseif action == rb.actions.ACTION_KBD_SELECT then
|
|
return true
|
|
elseif (action == rb.actions.ACTION_KBD_RIGHT) then
|
|
self.x = self.x + self.size
|
|
elseif (action == rb.actions.ACTION_KBD_LEFT) then
|
|
self.x = self.x - self.size
|
|
elseif (action == rb.actions.ACTION_KBD_UP) then
|
|
self.y = self.y - self.size
|
|
elseif (action == rb.actions.ACTION_KBD_DOWN) then
|
|
self.y = self.y + self.size
|
|
end
|
|
|
|
if self.x > rb.LCD_WIDTH then
|
|
self.x = 0
|
|
elseif self.x < 0 then
|
|
self.x = rb.LCD_WIDTH
|
|
end
|
|
|
|
if self.y > rb.LCD_HEIGHT then
|
|
self.y = 0
|
|
elseif self.y < 0 then
|
|
self.y = rb.LCD_HEIGHT
|
|
end
|
|
|
|
return false
|
|
end
|
|
|
|
function Cursor:draw()
|
|
set_foreground(DEFAULT_FOREGROUND_COLOR)
|
|
|
|
rb.lcd_hline(self.x - self.size/2, self.x - self.size/4, self.y - self.size/2)
|
|
rb.lcd_hline(self.x + self.size/4, self.x + self.size/2, self.y - self.size/2)
|
|
rb.lcd_hline(self.x - self.size/2, self.x - self.size/4, self.y + self.size/2)
|
|
rb.lcd_hline(self.x + self.size/4, self.x + self.size/2, self.y + self.size/2)
|
|
rb.lcd_vline(self.x - self.size/2, self.y - self.size/2, self.y - self.size/4)
|
|
rb.lcd_vline(self.x - self.size/2, self.y + self.size/4, self.y + self.size/2)
|
|
rb.lcd_vline(self.x + self.size/2, self.y - self.size/2, self.y - self.size/4)
|
|
rb.lcd_vline(self.x + self.size/2, self.y + self.size/4, self.y + self.size/2)
|
|
|
|
rb.lcd_hline(self.x - self.size/4, self.x + self.size/4, self.y)
|
|
rb.lcd_vline(self.x, self.y - self.size/4, self.y + self.size/4)
|
|
end
|
|
|
|
function draw_positioned_string(bottom, right, str)
|
|
local _, w, h = rb.font_getstringsize(str, rb.FONT_UI)
|
|
|
|
rb.lcd_putsxy((rb.LCD_WIDTH-w)*right, (rb.LCD_HEIGHT-h)*bottom, str)
|
|
end
|
|
|
|
function set_foreground(color)
|
|
if rb.lcd_set_foreground ~= nil then
|
|
rb.lcd_set_foreground(color)
|
|
end
|
|
end
|
|
|
|
function random_color()
|
|
if rb.lcd_rgbpack ~= nil then --color target
|
|
return rb.lcd_rgbpack(math.random(1,255), math.random(1,255), math.random(1,255))
|
|
end
|
|
|
|
return math.random(1, rb.LCD_DEPTH)
|
|
end
|
|
|
|
function start_round(level, goal, nrBalls, total)
|
|
local player_added, score, exit, nrExpandedBalls = false, 0, false, 0
|
|
local balls, explodedBalls = {}, {}
|
|
local cursor = Cursor:new()
|
|
|
|
-- Initialize the balls
|
|
for _=1,nrBalls do
|
|
table.insert(balls, Ball:new())
|
|
end
|
|
|
|
-- Make sure there are no unwanted touchscreen presses
|
|
rb.button_clear_queue()
|
|
|
|
while true do
|
|
local endtick = rb.current_tick() + CYCLETIME
|
|
|
|
-- Check if the round is over
|
|
if #explodedBalls == 0 and player_added then
|
|
break
|
|
end
|
|
|
|
-- Check for actions
|
|
local action = rb.get_action(rb.contexts.CONTEXT_KEYBOARD, 0)
|
|
if(action == rb.actions.ACTION_KBD_ABORT) then
|
|
exit = true
|
|
break
|
|
end
|
|
if not player_added and cursor:do_action(action) then
|
|
local player = Ball:new({
|
|
x = cursor.x,
|
|
y = cursor.y,
|
|
color = DEFAULT_FOREGROUND_COLOR,
|
|
size = 10,
|
|
explosion_size = 3*DEFAULT_BALL_SIZE,
|
|
exploded = true,
|
|
death_time = rb.current_tick() + rb.HZ * 3
|
|
})
|
|
table.insert(explodedBalls, player)
|
|
player_added = true
|
|
end
|
|
|
|
-- Check for hits
|
|
for i, ball in ipairs(balls) do
|
|
for _, explodedBall in ipairs(explodedBalls) do
|
|
if ball:checkHit(explodedBall) then
|
|
score = score + 100*level
|
|
nrExpandedBalls = nrExpandedBalls + 1
|
|
table.insert(explodedBalls, ball)
|
|
table.remove(balls, i)
|
|
break
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Check if we're dead yet
|
|
for i, explodedBall in ipairs(explodedBalls) do
|
|
if rb.current_tick() >= explodedBall.death_time then
|
|
if explodedBall.size > 0 then
|
|
explodedBall.implosion = true -- We should be dying
|
|
else
|
|
table.remove(explodedBalls, i) -- We're imploded!
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Drawing phase
|
|
rb.lcd_clear_display()
|
|
|
|
set_foreground(DEFAULT_FOREGROUND_COLOR)
|
|
draw_positioned_string(0, 0, string.format("%d balls expanded", nrExpandedBalls))
|
|
draw_positioned_string(0, 1, string.format("Level %d", level))
|
|
draw_positioned_string(1, 1, string.format("%d level points", score))
|
|
draw_positioned_string(1, 0, string.format("%d total points", total+score))
|
|
|
|
for _, ball in ipairs(balls) do
|
|
ball:step()
|
|
ball:draw()
|
|
end
|
|
|
|
for _, explodedBall in ipairs(explodedBalls) do
|
|
explodedBall:step()
|
|
explodedBall:draw()
|
|
end
|
|
|
|
if not HAS_TOUCHSCREEN and not player_added then
|
|
cursor:draw()
|
|
end
|
|
|
|
-- Push framebuffer to the LCD
|
|
rb.lcd_update()
|
|
|
|
if rb.current_tick() < endtick then
|
|
rb.sleep(endtick - rb.current_tick())
|
|
else
|
|
rb.yield()
|
|
end
|
|
end
|
|
|
|
return exit, score, nrExpandedBalls
|
|
end
|
|
|
|
-- Helper function to display a message
|
|
function display_message(...)
|
|
local message = string.format(...)
|
|
local _, w, h = rb.font_getstringsize(message, rb.FONT_UI)
|
|
local x, y = (rb.LCD_WIDTH - w) / 2, (rb.LCD_HEIGHT - h) / 2
|
|
|
|
rb.lcd_clear_display()
|
|
set_foreground(DEFAULT_FOREGROUND_COLOR)
|
|
if w > rb.LCD_WIDTH then
|
|
rb.lcd_puts_scroll(x/w, y/h, message)
|
|
else
|
|
rb.lcd_putsxy(x, y, message)
|
|
end
|
|
rb.lcd_update()
|
|
|
|
rb.sleep(rb.HZ * 2)
|
|
|
|
rb.lcd_stop_scroll() -- Stop our scrolling message
|
|
end
|
|
|
|
if HAS_TOUCHSCREEN then
|
|
rb.touchscreen_set_mode(rb.TOUCHSCREEN_POINT)
|
|
end
|
|
rb.backlight_force_on()
|
|
|
|
local idx, highscore = 1, 0
|
|
while levels[idx] ~= nil do
|
|
local goal, nrBalls = levels[idx][1], levels[idx][2]
|
|
|
|
display_message("Level %d: get %d out of %d balls", idx, goal, nrBalls)
|
|
|
|
local exit, score, nrExpandedBalls = start_round(idx, goal, nrBalls, highscore)
|
|
if exit then
|
|
break -- Exiting..
|
|
else
|
|
if nrExpandedBalls >= goal then
|
|
display_message("You won!")
|
|
idx = idx + 1
|
|
highscore = highscore + score
|
|
else
|
|
display_message("You lost!")
|
|
end
|
|
end
|
|
end
|
|
|
|
if idx > #levels then
|
|
display_message("You finished the game with %d points!", highscore)
|
|
else
|
|
display_message("You made it till level %d with %d points!", idx, highscore)
|
|
end
|
|
|
|
-- Restore user backlight settings
|
|
rb.backlight_use_settings()
|