Corona sdk 防止球的 x 运动

Question

在球跳到 Ractangle 后，我无法阻止球开始移动。矩形以恒定的速度向左移动。球跟随屏幕。当球在矩形上跳跃时，它会从矩形的下落中获得速度。请帮忙！

这是我的一些代码：

--make a box
local box1 = display.newRect( 600, 220, 20, 20 )
box1:setFillColor(255,255,255)
physics.addBody( box1, "static", { friction=0, bounce=0.0 } )

-- make a ball (off-screen) and position it
local ball = display.newImage( "ball.png", 20, 20 )
ball.x, ball.y = 100, 200


-- add physics to the ball
physics.addBody( ball, { density = 1.0, friction = 0, bounce = 0, radius = 19 } )

--rotate the ball
local function rotateBall()
ball.rotation = -365
transition.to( ball, { time=1000, rotation=365, onComplete=rotateBall} )

end
rotateBall()

Answer 1

如果我理解正确

• 您正试图让球在来回方向上无限旋转
• 让球弹起来

下面的代码可以解决这个问题：

local physics=require("physics")
physics.start()

--make a box
local box1 = display.newRect( 50, 420, 150, 150 )
box1:setFillColor(255,255,255)
physics.addBody( box1, "static", { friction=0, bounce=0.0 } )

-- make a ball (off-screen) and position it
local ball = display.newImage( "scnGame_bird.png", 20, 20 )
ball.x, ball.y = 100, 200


-- add physics to the ball
physics.addBody( ball, { density = 1.0, friction = 0, bounce = 0.8, radius = 19 } )

--rotate the ball

--ball.rotation = -365
local rotateBallReverse
local function rotateBall()
    transition.to( ball, { time=1000, rotation=365, onComplete=rotateBallReverse} )
end

rotateBallReverse = function()
    transition.to( ball, { time=1000, rotation=-365, onComplete=rotateBall} )
end
rotateBall()

对于其余部分，“防止 x 移动”是什么意思？