作爲SKEffectNode的子SKLabelNode上的SKWarpGeometry翻轉標籤顛倒

Question

我試圖扭曲SKLabelNode作爲SKEffectNode（文檔說，你可以做到這一點）的孩子，但它翻轉標籤節點顛倒之前，它應用經。這可能是一個錯誤，但在此之前我的文件，我認爲我會問放在這裏......

這裏是我的代碼：

func warpNode(_ node: SKEffectNode) 
{ 
    if #available(iOS 10.0, *) 
    { 
     let sourcePositions: [vector_float2] = 
      [ 
       vector_float2(0, 0), vector_float2(0.5, 0), vector_float2(1, 0), //bottom row of object 
       vector_float2(0, 0.5), vector_float2(0.5, 0.5), vector_float2(1, 0.5), //middle row of object 
       vector_float2(0, 1), vector_float2(0.5, 1), vector_float2(1, 1) //top row of object 
      ] 

     let destinationPositions: [vector_float2] = 
      [ 
       vector_float2(0, 0), vector_float2(0.5, 0), vector_float2(1, 0), //bottom row of object 
       vector_float2(0, 0.5), vector_float2(0.5, 0.5), vector_float2(1, 0.5), //middle row of object 
       vector_float2(0, 0.8), vector_float2(0.5, 0.8), vector_float2(1, 0.8) //top row of object 
      ] 

     let warpGeometryGrid = SKWarpGeometryGrid(columns: 2, rows: 2, sourcePositions: sourcePositions, destinationPositions: destinationPositions) 

     let warpGeometryGridNoWarp = SKWarpGeometryGrid(columns: 2, rows: 2) 

     node.warpGeometry = warpGeometryGridNoWarp 

     let warpAction = SKAction.animate(withWarps: [warpGeometryGridNoWarp, warpGeometryGrid, warpGeometryGridNoWarp], times: [0.25, 0.5, 0.75], restore: true) 

     node.run(warpAction!) 
    } 
    else 
    { 
     print("Need iOS >= iOS 10 to warp!!!") 
    } 
} 

let effectNode = SKEffectNode() 
effectNode.shouldEnableEffects = true     
addChild(effectNode) 

let labelNode = SKLabelNode(fontNamed: "Chalkduster") 
labelNode.text = "Label" 
effectNode.addChild(labelNode) 

warpNode(effectNode) 

此代碼應壓扁標籤的頂下來，然後將它恢復到原來的位置（就好像你推了一個球或某物），然而，它翻轉它顛倒，然後擠壓頂部（現在是底部），然後將其恢復到原始大小和位置（右側）。

編輯：基於0x141E的評論，我將SKLabelnode轉換爲SKTexture並添加了一個帶有該紋理的新SKSpriteNode。如果我在effectNode上使用了warpNode函數，則它會顛倒單詞，然後應用壓扁效果。但是，如果我直接在新的SKSpriteNode上使用warpNode函數，它將正常工作。

新的代碼如下：

func warpNode(_ node: SKSpriteNode) 
{ 
    if #available(iOS 10.0, *) 
    { 
     let sourcePositions: [vector_float2] = 
      [ 
       vector_float2(0, 0), vector_float2(0.5, 0), vector_float2(1, 0), //bottom row of object 
       vector_float2(0, 0.5), vector_float2(0.5, 0.5), vector_float2(1, 0.5), //middle row of object 
       vector_float2(0, 1), vector_float2(0.5, 1), vector_float2(1, 1) //top row of object 
      ] 

     let destinationPositions: [vector_float2] = 
      [ 
       vector_float2(0, 0), vector_float2(0.5, 0), vector_float2(1, 0), //bottom row of object 
       vector_float2(0, 0.5), vector_float2(0.5, 0.5), vector_float2(1, 0.5), //middle row of object 
       vector_float2(0, 0.8), vector_float2(0.5, 0.8), vector_float2(1, 0.8) //top row of object 
      ] 

     let warpGeometryGrid = SKWarpGeometryGrid(columns: 2, rows: 2, sourcePositions: sourcePositions, destinationPositions: destinationPositions) 

     let warpGeometryGridNoWarp = SKWarpGeometryGrid(columns: 2, rows: 2) 

     node.warpGeometry = warpGeometryGridNoWarp 

     let warpAction = SKAction.animate(withWarps: [warpGeometryGridNoWarp, warpGeometryGrid, warpGeometryGridNoWarp], times: [0.25, 0.5, 0.75], restore: true) 

     node.run(warpAction!) 
    } 
    else 
    { 
     print("Need iOS >= iOS 10 to warp!!!") 
    } 
} 

let labelNode = SKLabelNode(fontNamed: "Chalkduster") 
labelNode.text = "Label" 

let labelNodeTexture = SKView().texture(from: labelNode)! 
let labelNodeSprite = SKSpriteNode(texture: labelNodeTexture) 

addChild(labelNodeSprite) 

warpNode(labelNodeSprite) 

我只是消除了代碼的整體effectNode部分並添加新的精靈，並做了經紗。

Answer 1

編輯我的問題作爲基於0x141E的評論的答案。