如何使用Kotlin匿名類作為本機JavaScript函數的參數？

Question

我正在為此 ThreeJS類設置互操作層，並且該類的構造函數接受一個用於設置屬性的對象。

//PointCloudMaterial.js    
THREE.PointCloudMaterial = function ( parameters ) {
    THREE.Material.call( this );
    this.color = new THREE.Color( 0xffffff );
    this.map = null;
    this.size = 1;
    this.sizeAttenuation = true;
    this.vertexColors = THREE.NoColors;
    this.fog = true;
    this.setValues( parameters );
};

以下是我想在Kotlin中能夠做的事情，是否可以以某種方式使用異常對象？ 我本來是想創建一個等效於要傳入的周長的對象，但問題是它會覆蓋當前值，這不是我想要的。

//Interop Layer
native("THREE.PointCloudMaterial")
public class PointCloudMaterial(parameters: object) { } //This doesn't compile "Type Expected"

//Example usage
var sizeObject = object {
     var size: Double = size
}
PointCloudMaterial(sizeObject);

Answer 1

類型安全的解決方案可能如下所示：

native 
val <T> undefined: T = noImpl

class PointCloudMaterialParameters (
   val color: Int = undefined,
   val opacity: Double = undefined,
   //val map: THREE.Texture = undefined,
   val size: Double = undefined,
   //val blending: THREE.NormalBlending = undefined,
   val depthTest: Boolean = undefined,
   val depthWrite: Boolean = undefined,
   val vertexColors: Boolean = undefined,
   val fog: Boolean = undefined
)

fun main(args : Array<String>) {
  println(PointCloudMaterialParameters(size = 2.0))
}

native("THREE.PointCloudMaterial")
public class PointCloudMaterial(parameters: PointCloudMaterialParameters)

//Example usage
PointCloudMaterial(PointCloudMaterialParameters(size = 2.0))

另一個較短但不安全的解決方案是：

native("THREE.PointCloudMaterial")
public class PointCloudMaterial(parameters: Any)

//Example usage
PointCloudMaterial(object { val size = 2.0 })

附言：我們將在以后嘗試簡化這種情況。