我尝试使用lua中的Objects进行实验，所以我尝试制作一个StaticBody和一个碰撞和一个Hitbox对象，但是当我在创建静态主体的行中启动main时它会发出错误：＆＃34; main.lua：4尝试索引全球＆＃39; StaticBody＆＃39; （布尔值）＆＃34;
https://pastebin.com/UFnEcYcT 这是代码
--main.lua
StaticBody = require"StaticBody"
collision = require"collision"
player = StaticBody.StaticBody:new(300, 200, 40, 30, "RECT", 2000, 5000, 8.9, 900, 900, 5)
function love.load()
playerimg = love.graphics.newImage("player.png")
player:setSprite(playerimg, 1, 1, 0, 0)
end
function love.draw()
player:draw()
end
function love.update(d)
if love.keyboard.isDown("a") then
input = -1
end
if love.keyboard.isDown("d") then
input = 1
end
if not love.keyboard.isDown("a") and not love.keyboard.isDown("d") then
input = 0
end
player:update(d,input)
end
function love.keypressed( key, scancode, isrepeat)
if key == "space" then
player:jump(800)
end
end
-----------------------------------------------------------------------------------------------------------------
--StaticBody.lua
-----------------------------------------------------------------------------------------------------------------
StaticBody = {x = 0, y = 0, w = 1, h = 1, speedx = 0, speedy = 0, maxxspd = 1, maxyspd = 1, collosionmode = "RECT", sprite = nil, scalex = 1,
scaley = 1, offsetx = 0, offsety = 0, acc = 1, decel = 1, grav = 1, velx = 0, colbox = nil, hitbox = nil, turningfriction = 2}
collision = require"collision"
function clamp(variable,vmin,vmax)
if variable < vmin then
variable = vmin
end
if variable > vmax then
variable = vmax
end
end
function StaticBody:new(x, y, w, h, colmode, acc, decel, grav, maxxspd, maxyspd, turningfriction)
setmetatable({},StaticBody)
self.x = x
self.y = y
self.w = w
self.h = h
self.hitbox = collision.hitbox:new(x,y,w,h,false)
self.colbox = collision.ColObjekt:new(colmode,self.hitbox)
self.acc = acc
self.decel = decel
self.grav = grav
self.maxxspd = maxxspd
self.maxyspd = maxyspd
self.speedx = 0
self.speedy = 0
self.turningfriction = turningfriction
self.velx = 0
return self
end
function StaticBody:setSprite(sprite, scalex, scaley, offsetx, offsety)
self.sprite = sprite
self.scalex = scalex
self.scaley = scaley
self.offsetx = offsetx
self.offsety = offsety
end
function StaticBody:draw()
love.graphics.draw(self.sprite,self.x,self,y,0,self.scalex,self.scaley,self.offsetx,self.offsety,0,0)
end
function StaticBody:update(d,input)
local dir = 0
if input == -dir then
self.speedx = self.speedx / self.turningfriction
end
if input then
dir = input
end
if not self.colbox:getOnGround() then
self.speedy = self.speedy + self.grav * d
end
if input ~= 0 then
self.speedx = self.speedx + self.acc * d
else
self.speedx = self.speedx - self.decel * d
end
clamp(self.speedx,0,self.maxxspd)
clamp(self.speedy,0,self.maxyspd)
self.velx = self.speedx * d * dir
self.y = self.y + self.speedy * d
self.x = self.x + self.speedx * d * dir
end
function StaticBody:jump(jumpforce)
self.speedy = -jumpforce
end
------------------------------------------------------------------------------------------------
--collision.lua
------------------------------------------------------------------------------------------------
ColObjekts = {}
ColObjekt = {mode, x, y, w, h, collisionObjekts = ColObjekts}
--Constructer
function ColObjekt:new(mode,x,y,w,h,collisionObjekts)
setmetatable({},ColObjekt)
self.mode = mode
self.collisionObjekts = collisionObjekts
self.x = x
self.y = y
self.w = w
self.h = h
ColObjekts.push(self)
return self
end
--Constructer with Hitbbox
function ColObjekt:new(mode,Hb,collisionObjekts)
setmetatable({},ColObjekt)
self.mode = mode
self.collisionObjekts = collisionObjekts
self.x = Hb.x
self.y = Hb.y
self.w = Hb.w
self.h = Hb.h
end
function ColObjekt:setcolObjekts(colobs)
self.collisionObjekts = colobs
end
function ColObjekt:getColliding()
for key,i in pairs(self.collisionObjekts) do
if getCollidingWith(self,i) then
return true
end
return false
end
end
function ColObjekt:getCollidingWhich()
for key,i in pairs(self.collisionObjekts) do
if getCollidingWith(self,i) then
return true, i
end
return false
end
end
function ColObjekt:getCollidingDir(Colob1,Colob2)
if not getCollidingWith(Colob1,Colob2) then
return false
elseif Colob1.y > Colob2.y then return "ONTOP"
elseif Colob1.x < Colob2.x and Colob1.y > Colob2.y+Colob2.h then return "LEFT"
elseif Colob1.x > Colob2.x and Colob1.y > Colob2.y+Colob2.h then return "RIGHT"
else return "UNDER"
end
end
function ColObjekt:getOnGround()
if self:getCollidingDir(self,self:getCollidingWhich()) == "ONTOP" then
return true
else
return false
end
function getCollidingWith(Colob1,Colob2)
--if Colob1 == Rectangle
if Colob1.mode == "RECT" then
if Colob2.mode == "RECT" then
ColRect_Rect(Colob1,Colob2)
end
if Colob2.mode == "CIRCLE" then
ColRect_Circle(Colob2,Colob1)
end
end
--if Colob1 == Circle
if Colob1.mode == "CIRCLE" then
if Colob2.mode == "CIRCLE" then
ColCircle_Circle(Colob1,Colob2)
end
if Colob2.mode == "RECT" then
ColRect_Circle(Colob1,Colob2)
end
end
end
function ColRect_Edges(c,r)
--OBEN
if c.x > r.x and c.x < r.x + r.w
and c.y > r.y - c.h and c.y < r.y then return true
--UNTEN
elseif c.x > r.x and c.x < r.x + r.w
and c.y > r.y + r.h - c.h and c.y < r.y + r.h then return true
--LINKS
elseif c.y > r.y and c.y < r.y + r.h
and c.x > r.x - c.w and c.x < r.x then return true
--RECHTS
elseif c.y > r.y and c.y < r.y + r.h
and c.x > r.x + r.w - c.w and c.x < r.x + r.w then return true
--WENN NICHTS ZUTRIFFT
else return false end
end
function ColRect_Corners(c,r)
if math.sqrt((c.x - r.x * c.x - r.x) + (c.y - r.y * c.y - r.y)) < c.w/2 then
return true
elseif math.sqrt((c.x - (r.x + r.w) * c.x - (r.x + r.w)) + (c.y - r.y * c.y - r.y)) < c.w/2 then
return true
elseif math.sqrt((c.x - (r.x + r.w) * c.x - (r.x + r.w)) + (c.y - (r.y + r.h) * c.y - (r.y + r.h))) < c.w/2 then
return true
elseif math.sqrt((c.x - r.x * c.x - r.x) + (c.y - (r.y + r.h) * c.y - (r.y + r.h))) then
return true
else
return false
end
end
function ColRect_Rect(r1,r2)
if r1.x < r2.x + r2.w and r1.x > r2.x - r1.x and r1.y > r2.y - r1.h and r1.y < r2.y + r2.h then
return true
end
return false
end
function ColCircle_Circle(c1,c2)
local scndx = c1.x - c2.x
local scndy = c1.y - c2.y
if math.sqrt((scndx * scndx) + (scndy * scndy)) < c1.w/2 + c2.w/2 then
return true
end
return false
end
function ColRect_Circle(c,r)
if c.x > r.x and c.x < r.x + r.w
and c.y > r.y and c.y < r.y + r.h then
return true
end
if ColRect_Corners(c,r) then
return true
end
if ColRect_Edges(c,r) then
return true
end
return false
end
Hitbox = {x,y,w,h,show = false}
function Hitbox:new(x,y,w,h,show)
setmetatable({},Hitbox)
self.x = x
self.y = y
self.w = w
self.h = h
self.show = show
return self
end
function Hitbox:update()
if self.show then
love.graphics.Rectangle("fill",self.x,self.y,self.w,self.h)
end
end
function Hitbox:setVisible(b)
self.show = b
end
end
答案 0 :(得分：2)
当您在Lua中false模块时，传递给您的值是在模块最末端return StaticBody的值。如果没有这样的return语句，Lua似乎隐式返回一个布尔值（StaticBody.lua或package.loaded）。
您需要在package.loaded.StaticBody = StaticBody
结束时{{1}}。对于项目与之交互的每个其他模块也是如此。
有关详细信息，请参阅@ge文章。
正如@nobody在评论中提及的那样，您还可以自行分配到{{1}}表来决定要导出的内容。
{{1}}