SceneKit_高级05 检测手势点击到节点

  public func hitTest(_ point: CGPoint, options: [SCNHitTestOption : Any]? = nil) -> [SCNHitTestResult]

let tap = UITapGestureRecognizer(target: self, action: #selector(tapHandle(gesture:)))
scnView.addGestureRecognizer(tap)

func tapHandle(gesture:UITapGestureRecognizer){
    let results:[SCNHitTestResult] = (self.scnView?.hitTest(gesture.location(ofTouch: 0, in: self.scnView), options: nil))!
    guard let firstNode  = results.first else{
        return
    }
    // 点击到的节点
    print(firstNode.node)
}

open class SCNHitTestResult : NSObject {


/// 击中的几点
open var node: SCNNode { get }

/// 击中的几何体索引
open var geometryIndex: Int { get }

/// 击中的面的索引
open var faceIndex: Int { get }

 /// 击中的本地坐标系统
open var localCoordinates: SCNVector3 { get }


 /// 击中的世界坐标系统
open var worldCoordinates: SCNVector3 { get }


/// 击中节点的本地法线坐标
open var localNormal: SCNVector3 { get }


/// 击中的世界坐标系统的法线坐标
open var worldNormal: SCNVector3 { get }


/*! World transform of the node intersected. */
open var modelTransform: SCNMatrix4 { get }


/*! The bone node hit. Only available if the node hit has a SCNSkinner attached. */
@available(iOS 10.0, *)
open var boneNode: SCNNode { get }


/*!
 @method textureCoordinatesWithMappingChannel:
 @abstract Returns the texture coordinates at the point of intersection, for a given mapping channel.
 @param channel The texture coordinates source index of the geometry to use. The channel must exists on the geometry otherwise {0,0} will be returned.
 */
open func textureCoordinates(withMappingChannel channel: Int) -> CGPoint
}