light_world.lua/main.lua

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--
-- EXF: Example Framework
--
-- This should make examples easier and more enjoyable to use.
-- All examples in one application! Yaay!
--
-- Updated by Dresenpai
require "lib/postshader"
local LightWorld = require "lib/light_world"
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exf = {}
exf.current = nil
exf.available = {}
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function love.load()
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exf.list = List:new()
exf.smallfont = love.graphics.newFont(love._vera_ttf,12)
exf.bigfont = love.graphics.newFont(love._vera_ttf, 24)
exf.list.font = exf.smallfont
exf.bigball = love.graphics.newImage("gfx/love-big-ball.png")
-- Find available demos.
local files = love.filesystem.getDirectoryItems("examples")
local n = 0
for i, v in ipairs(files) do
n = n + 1
table.insert(exf.available, v);
local file = love.filesystem.newFile(v, love.file_read)
file:open("r")
local contents = love.filesystem.read("examples/" .. v, 100)
local s, e, c = string.find(contents, "Example: ([%a%p ]-)[\r\n]")
file:close(file)
if not c then c = "Untitled" end
local title = exf.getn(n) .. " " .. c .. " (" .. v .. ")"
exf.list:add(title, v)
end
exf.list:done()
exf.resume()
end
function love.update(dt) end
function love.draw() end
function love.keypressed(k) end
function love.keyreleased(k) end
function love.mousepressed(x, y, b) end
function love.mousereleased(x, y, b) end
function exf.empty() end
function exf.update(dt)
exf.list:update(dt)
lightMouse:setPosition(love.mouse.getX(), love.mouse.getY())
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end
function exf.draw()
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love.graphics.setBackgroundColor(0, 0, 0)
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love.graphics.setColor(48, 156, 225)
love.graphics.rectangle("fill", 0, 0, love.window.getWidth(), love.window.getHeight())
love.graphics.setColor(255, 255, 255, 191)
love.graphics.setFont(exf.bigfont)
love.graphics.print("Examples:", 50, 50)
love.graphics.setFont(exf.smallfont)
love.graphics.print("Browse and click on the example you \nwant to run. To return the the example \nselection screen, press escape.", 500, 80)
exf.list:draw()
lightWorld:update()
lightWorld:drawShadow()
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love.graphics.setColor(255, 255, 255)
love.graphics.draw(exf.bigball, 800 - 128, 600 - 128, love.timer.getTime(), 1, 1, exf.bigball:getWidth() * 0.5, exf.bigball:getHeight() * 0.5)
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end
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function exf.keypressed(k)
end
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function exf.keyreleased(k)
end
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function exf.mousepressed(x, y, b)
exf.list:mousepressed(x, y, b)
end
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function exf.mousereleased(x, y, b)
exf.list:mousereleased(x, y, b)
end
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function exf.getn(n)
local s = ""
n = tonumber(n)
local r = n
if r <= 0 then error("Example IDs must be bigger than 0. (Got: " .. r .. ")") end
if r >= 10000 then error("Example IDs must be less than 10000. (Got: " .. r .. ")") end
while r < 1000 do
s = s .. "0"
r = r * 10
end
s = s .. n
return s
end
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function exf.intable(t, e)
for k, v in ipairs(t) do
if v == e then return true end
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end
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return false
end
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function exf.start(item, file)
local e_id = string.sub(item, 1, 4)
local e_rest = string.sub(item, 5)
local unused1, unused2, n = string.find(item, "(%s)%.lua")
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if exf.intable(exf.available, file) then
if not love.filesystem.exists("examples/" .. file) then
print("Could not load game .. " .. file)
else
-- Clear all callbacks.
love.load = exf.empty
love.update = exf.empty
love.draw = exf.empty
love.keypressed = exf.empty
love.keyreleased = exf.empty
love.mousepressed = exf.empty
love.mousereleased = exf.empty
love.filesystem.load("examples/" .. file)()
exf.clear()
--love.window.setTitle(e_rest)
-- Redirect keypress
local o_keypressed = love.keypressed
love.keypressed =
function(k)
if k == "escape" then
exf.resume()
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end
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o_keypressed(k)
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end
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love.load()
end
else
print("Example ".. e_id .. " does not exist.")
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end
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end
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function exf.clear()
love.graphics.setBackgroundColor(0,0,0)
love.graphics.setColor(255, 255, 255)
love.graphics.setLineWidth(1)
love.graphics.setLineStyle("smooth")
--love.graphics.setLine(1, "smooth")
--love.graphics.setColorMode("replace")
love.graphics.setBlendMode("alpha")
love.mouse.setVisible(true)
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end
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function exf.resume()
load = nil
love.update = exf.update
love.draw = exf.draw
love.keypressed = exf.keypressed
love.keyreleased = exf.keyreleased
love.mousepressed = exf.mousepressed
love.mousereleased = exf.mousereleased
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love.mouse.setVisible(true)
love.window.setTitle("LOVE Example Browser")
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-- create light world
lightWorld = LightWorld()
lightWorld:setAmbientColor(127, 127, 127)
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-- create light
lightMouse = lightWorld:newLight(0, 0, 255, 127, 63, 500)
lightMouse:setSmooth(2)
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-- create shadow bodys
circleTest = lightWorld:newCircle(800 - 128, 600 - 128, 46)
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end
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function inside(mx, my, x, y, w, h)
return mx >= x and mx <= (x+w) and my >= y and my <= (y+h)
end
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----------------------
-- List object
----------------------
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List = {}
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function List:new()
o = {}
setmetatable(o, self)
self.__index = self
o.items = {}
o.files = {}
o.x = 50
o.y = 70
o.width = 400
o.height = 500
o.item_height = 23
o.sum_item_height = 0
o.bar_size = 20
o.bar_pos = 0
o.bar_max_pos = 0
o.bar_width = 15
o.bar_lock = nil
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return o
end
function List:add(item, file)
table.insert(self.items, item)
table.insert(self.files, file)
end
function List:done()
self.items.n = #self.items
-- Recalc bar size.
self.bar_pos = 0
local num_items = (self.height/self.item_height)
local ratio = num_items/self.items.n
self.bar_size = self.height * ratio
self.bar_max_pos = self.height - self.bar_size - 3
-- Calculate height of everything.
self.sum_item_height = (self.item_height+1) * self.items.n + 2
end
function List:hasBar()
return self.sum_item_height > self.height
end
function List:getBarRatio()
return self.bar_pos/self.bar_max_pos
end
function List:getOffset()
local ratio = self.bar_pos/self.bar_max_pos
return math.floor((self.sum_item_height-self.height)*ratio + 0.5)
end
function List:update(dt)
if self.bar_lock then
local dy = math.floor(love.mouse.getY()-self.bar_lock.y+0.5)
self.bar_pos = self.bar_pos + dy
if self.bar_pos < 0 then
self.bar_pos = 0
elseif self.bar_pos > self.bar_max_pos then
self.bar_pos = self.bar_max_pos
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end
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self.bar_lock.y = love.mouse.getY()
end
end
function List:mousepressed(mx, my, b)
if self:hasBar() then
if b == "l" then
local x, y, w, h = self:getBarRect()
if inside(mx, my, x, y, w, h) then
self.bar_lock = { x = mx, y = my }
end
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end
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local per_pixel = (self.sum_item_height-self.height)/self.bar_max_pos
local bar_pixel_dt = math.floor(((self.item_height)*3)/per_pixel + 0.5)
if b == "wd" then
self.bar_pos = self.bar_pos + bar_pixel_dt
if self.bar_pos > self.bar_max_pos then self.bar_pos = self.bar_max_pos end
elseif b == "wu" then
self.bar_pos = self.bar_pos - bar_pixel_dt
if self.bar_pos < 0 then self.bar_pos = 0 end
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end
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end
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if b == "l" and inside(mx, my, self.x+2, self.y+1, self.width-3, self.height-3) then
local tx, ty = mx-self.x, my + self:getOffset() - self.y
local index = math.floor((ty/self.sum_item_height)*self.items.n)
local i = self.items[index+1]
local f = self.files[index+1]
if f then
exf.start(i, f)
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end
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end
end
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function List:mousereleased(x, y, b)
if self:hasBar() then
if b == "l" then
self.bar_lock = nil
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end
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end
end
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function List:getBarRect()
return
self.x+self.width+2, self.y+1+self.bar_pos,
self.bar_width-3, self.bar_size
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end
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function List:getItemRect(i)
return
self.x+2, self.y+((self.item_height+1)*(i-1)+1)-self:getOffset(),
self.width-3, self.item_height
end
function List:draw()
love.graphics.setLineWidth(2)
love.graphics.setLineStyle("rough")
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love.graphics.setFont(self.font)
love.graphics.setColor(48, 156, 225)
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local mx, my = love.mouse.getPosition()
-- Get interval to display.
local start_i = math.floor( self:getOffset()/(self.item_height+1) ) + 1
local end_i = start_i+math.floor( self.height/(self.item_height+1) ) + 1
if end_i > self.items.n then end_i = self.items.n end
love.graphics.setScissor(self.x, self.y, self.width, self.height)
-- Items.
for i = start_i,end_i do
local x, y, w, h = self:getItemRect(i)
local hover = inside(mx, my, x, y, w, h)
if hover then
love.graphics.setColor(0, 0, 0, 127)
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else
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love.graphics.setColor(0, 0, 0, 63)
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end
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love.graphics.rectangle("fill", x+1, y+i+1, w-3, h)
if hover then
love.graphics.setColor(255, 255, 255)
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else
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love.graphics.setColor(255, 255, 255, 127)
end
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local e_id = string.sub(self.items[i], 1, 5)
local e_rest = string.sub(self.items[i], 5)
love.graphics.print(e_id, x+10, y+i+6) --Updated y placement -- Used to change position of Example IDs
love.graphics.print(e_rest, x+50, y+i+6) --Updated y placement -- Used to change position of Example Titles
end
love.graphics.setScissor()
-- Bar.
if self:hasBar() then
local x, y, w, h = self:getBarRect()
local hover = inside(mx, my, x, y, w, h)
if hover or self.bar_lock then
love.graphics.setColor(0, 0, 0, 127)
else
love.graphics.setColor(0, 0, 0, 63)
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end
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love.graphics.rectangle("fill", x, y, w, h)
end
-- Border.
love.graphics.setColor(0, 0, 0, 63)
love.graphics.rectangle("line", self.x+self.width, self.y, self.bar_width, self.height)
love.graphics.rectangle("line", self.x, self.y, self.width, self.height)
end