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--[[
program entry
]]
local function _onEvent(e)
-- update keyboard status
if e.type == "keydown" then
jin.keyboard.set(e.key, true)
elseif e.type == "keyup" then
jin.keyboard.set(e.key, false)
end
-- call user onEvent function
if jin.core.onEvent then
jin.core.onEvent(e)
end
end
-------------------------------------------------
-- init file system
-------------------------------------------------
jin._argv[2] = jin._argv[2] or '.'
jin.filesystem.init()
jin.filesystem.mount(jin._argv[2])
-- config
local conf = {}
if jin.filesystem.exist("config.lua") then
conf = require "config"
end
conf.width = conf.width or 600
conf.height = conf.height or 500
conf.fps = conf.fps or 60
conf.title = conf.title or ("jin v" .. jin.version())
-- init video subsystem
jin.graphics.init(conf.width,conf.height,conf.title)
-- open debug mode, must after jin.graphics.init
if jin._argv[3] == '-d' then
jin.debug.init()
end
function jin.core.run()
local now = jin.time.second()
local last = now
local fsec = 1/conf.fps
-- for loading resources
if jin.core.load then
jin.core.load()
end
local dt = 0
while(jin.core.running()) do
-- frame controle
last = now
now = jin.time.second()
if (now - last) < fsec then
jin.time.sleep(fsec - now + last)
end
-- handle events
for _, e in pairs(jin.event.poll()) do
if _onEvent then
_onEvent(e)
end
end
-- update
dt = now - last
if dt < fsec then
dt = fsec
end
if jin.core.onUpdate then
jin.core.onUpdate(dt)
end
-- bind to default render buffer
jin.graphics.bind()
jin.graphics.clear()
jin.graphics.color()
jin.graphics.study()
-- custom drawing
if jin.core.onDraw then
jin.core.onDraw()
end
-- render debug window
if jin.debug.status() then
jin.debug.render()
end
-- swap window buffer
jin.graphics.present()
end
end
local function onError(msg)
local tab = ' '
print("Error:\n" .. msg)
function jin.core.onEvent(e)
if e.type == 'quit' then
jin.core.quit()
end
end
local ww, wh = jin.graphics.size()
function jin.core.onDraw()
jin.graphics.write("Error: ", 10, 10, 30, 3, 30)
jin.graphics.write(msg, 10, 50)
end
end
if jin.filesystem.exist("main.lua") then
-- require main game script
xpcall(function() require"main" end, onError)
jin.core.run()
else
-- no game
function jin.core.onEvent(e)
if e.type == 'quit' then
jin.core.quit()
end
end
function jin.core.onDraw()
jin.graphics.clear(111, 134, 125, 255)
local ww, wh = jin.graphics.size()
local fw, fh = jin.graphics.box("no game", 20, 1, 20)
jin.graphics.write("no game", ww /2 - fw / 2, wh * 2/3, 16, 1, 18)
end
jin.core.run()
end
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