Swift Scenekit - 居中SCNText - getBoundingBoxMin：Max问题 [英] Swift Scenekit - Centering SCNText - the getBoundingBoxMin:Max issue

问题描述

享受SCNText上的alignmentMode选项。谷歌搜索周围看起来像alignmentMode和containerFrame有问题。我发现的替代方案建议使用获取边界框功能来查找文本大小，然后相应地手动调整。很棒，除了我不能让功能工作。当我试图得到这两个向量时，我得到一个错误：

Having fun with the alignmentMode option on SCNText. Been googling around and it looks like there is a problem with alignmentMode and containerFrame. The alternatives I've found suggest using the get bounding box function to find the text size and then manually adjust accordingly. Great except I cant get the function to work. When I try to get the two vectors I get an error:

'SCNVector3'不能转换为'UnsafeMutablePointer< SCNVector3>'

'SCNVector3' is not convertible to 'UnsafeMutablePointer < SCNVector3>'

我在几何体和节点上都得到了它。代码示例如下

I get that both on the geometry and the node. example of the code is below

func setCounterValue(counterValue:Int) {

    var v1 = SCNVector3(x: 0,y: 0,z: 0)
    var v2 = SCNVector3(x: 0,y: 0,z: 0)


    _counterValue = counterValue

    let newText = SCNText(string: String(format: "%06d", counterValue), extrusionDepth:sDepth)
    newText.font = UIFont (name: "Arial", size: 3)
    newText.firstMaterial!.diffuse.contents = UIColor.whiteColor()
    newText.firstMaterial!.specular.contents = UIColor.whiteColor()

    newText.getBoundingBoxMin(v1, max: v2)

    _textNode = SCNNode(geometry: newText)
    _textNode.getBoundingBoxMin(v1, max: v2)

}

任何建议都非常感谢。

推荐答案

好的，所以我的最终代码解决方案如下：

OK so my final code solution looks like:

func setCounterValue(counterValue:Int) {

    var v1 = SCNVector3(x: 0,y: 0,z: 0)
    var v2 = SCNVector3(x: 0,y: 0,z: 0)

    _textNode.removeFromParentNode()
    _counterValue = counterValue

    let newText = SCNText(string: String(format: "%08d", counterValue), extrusionDepth:sDepth)
    newText.font = UIFont (name: "Arial", size: 3)
    newText.firstMaterial!.diffuse.contents = UIColor.whiteColor()
    newText.firstMaterial!.specular.contents = UIColor.whiteColor()

    _textNode = SCNNode(geometry: newText)
    _textNode.getBoundingBoxMin(&v1, max: &v2)

    let dx:Float = Float(v1.x - v2.x)/2.0
    let dy:Float = Float(v1.y - v2.y)
    _textNode.position = SCNVector3Make(dx, dy, Float(sDepth/2))

    node.addChildNode(_textNode)

}

我已经离开了几个全局变量，但应该有意义。

I've left in my couple of global variables, but should make sense.

感谢您的帮助。

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