Question

我有一个海狸，意在跟随用户frog。它以较慢的速度向青蛙的方向移动。但是我希望海狸有一个左右动画。所以我让运动起作用，而不是动画。

local BidoofSheetData = 
{   
    width = 32,
    height = 48,
    numFrames = 8,
    sheetContentWidth = 128,
    sheetcontentheight = 96
}

--Set File Actual size
bidoofSheet = graphics.newImageSheet ("BidoofSpriteSheet.png", BidoofSheetData)

--Set the sequences
local bidoofsequenceData = {
    {name = "bstop", start = 1, count = 1, time = 300},
    {name = "bleft", start = 2, count = 3, time = 300},
    {name = "bright", start = 5, count = 3, time = 300} 
}

--frog mask
local physicsData = (require "bidoofdefs").physicsData(1.0)

--Link sheet data to previous settings
beaver = display.newSprite(bidoofSheet, bidoofsequenceData)
beaver.x = display.contentWidth/2
beaver.y = 284
physics.addBody( beaver, "static")
beaver.isFixedRotation = true

--
function moveBeaver ()
    if frog.x > beaver.x then
        beaver.x = beaver.x + 0.5
    elseif frog.x < beaver.x then
        beaver.x = beaver.x - 0.5
    elseif frog.x == beaver.x then
        beaver.x = beaver.x
    end
end
Runtime:addEventListener("enterFrame", moveBeaver)

我尝试在moveBeaver函数中添加它，但它不起作用。

编辑：我尝试将beaver:setSequence("bleft");beaver:play()添加到不同的区域。如果你朝各自的方向移动，它会为左边和右边一个框架。如果你向左或向右移动并停止，它将不断播放左右两帧。

但它没有播放我想要的3帧动画。

Answer 1

首先，我注意到您的工作表数据不一致。

local BidoofSheetData = 
{   
    width = 32,
    height = 48,
    numFrames = 8,
    sheetContentWidth = 128,
    sheetcontentheight = 96 -- Shouldn't this be sheetContentHeight ?
}

我不确定sheetContentHeight是否具有适当的大写字母，但我认为我会把它提起来。我想我现在知道动画的问题。您将它设置为在海狸需要移动时播放，这会将其重置为动画的第一帧。

请改为尝试：

function updateAnim(who, seq)
    if who.sequence == seq then
        -- We're already animating the way we need to be.
        return
    end

    who:setSequence(seq)
    who:play()
end

function moveBeaver()
    -- Get the distance from beaver to frog's position.
    local d = frog.x - beaver.x

    -- This will allow the beaver to stop precisely on the frog's position,
    -- without exceeding a distance of +/- 0.5 per move.
    if d == 0 then
        updateAnim(beaver, "bstop")
    elseif d > 0 then
        beaver.x = beaver.x + math.min(d, 0.5)
        updateAnim(beaver, "bright")
    else
        beaver.x = beaver.x + math.max(d, -0.5)
        updateAnim(beaver, "bleft")
    end
end

在if语句中使用spritesheet移动图像

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