排除碰撞侦听器的一个对象

Question

在下面的代码行6我已经添加了一个Runtime:addEventListener("collision", onCollision)，但它与一切与身体交互，如何排除碰撞监听器在这种情况下，在这种情况下'BCloud1.png'

function getRandomStar() 
    local temp = starTable[math.random(1, #starTable)] -- Get a random star from starTable 
    local randomStar = display.newImage(temp.imgpath) -- Set image path for object 

    if (temp.imgpath == "BCloud1.png") then 
    physics.addBody(randomStar, "static", { density=.1, bounce=.1, friction=.2, radius=45 }) 
    Runtime:addEventListener("collision", onCollision) 
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png"; 
    end 

    if (temp.imgpath == "BCloud2.png") then 
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png"; 
    physics.addBody(randomStar, "static", { density=.1, bounce=.1, friction=.2, radius=45 }) 
    end 

    if (temp.imgpath == "BCloud3.png") then 
    temp.imgpath = "BCloud"..tostring(math.random(1, 3))..".png"; 
    physics.addBody(randomStar, "static", { density=.1, bounce=.1, friction=.2, radius=45 }) 
    end 

    randomStar.myName = "star" -- Set the name of the object to star 
    randomStar.movementSpeed = temp.movementSpeed; -- Set how fast the object will move 
    randomStar.x = math.random(-30, _W);  
    randomStar.y = -35; 
    randomStar.rotation = math.random(0,20) -- Rotate the object 

    starMove = transition.to(randomStar, { 
     time=randomStar.movementSpeed, 
     y=500, 
     onComplete = function(self) self.parent:remove(self); self = nil; 
     end 
     }) -- Move the star 
end--END getRandomStar() 

Answer 1

如果你想使用

Runtime:addEventListener("collision", onCollision) 

和控制与什么什么碰撞，然后用碰撞过滤器。他们看起来容易得多。

这是我在学习关于它们时使用的教程。

Collision Filters