作者:黑漆高傲的眼眸 | 来源:互联网 | 2023-01-19 17:53
如何绘制边框以突出显示SCNNode并向用户指示该节点已被选中?在我的项目中,用户可以放置多个虚拟对象,用户可以随时选择任何对象.选择后,我应该向用户显示高亮显示的3D对象.有没有办法直接实现这个或在SCNNode上绘制边框?
1> LinusGeffart..:
您需要添加一个轻击手势识别器sceneView
.
// add a tap gesture recognizer
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
scnView.addGestureRecognizer(tapGesture)
然后,处理点击并突出显示节点:
@objc
func handleTap(_ gestureRecognize: UIGestureRecognizer) {
// retrieve the SCNView
let scnView = self.view as! SCNView
// check what nodes are tapped
let p = gestureRecognize.location(in: scnView)
let hitResults = scnView.hitTest(p, options: [:])
// check that we clicked on at least one object
if hitResults.count > 0 {
// retrieved the first clicked object
let result = hitResults[0]
// get its material
let material = result.node.geometry!.firstMaterial!
// highlight it
SCNTransaction.begin()
SCNTransaction.animatiOnDuration= 0.5
// on completion - unhighlight
SCNTransaction.completiOnBlock= {
SCNTransaction.begin()
SCNTransaction.animatiOnDuration= 0.5
material.emission.cOntents= UIColor.black
SCNTransaction.commit()
}
material.emission.cOntents= UIColor.red
SCNTransaction.commit()
}
}
上面的代码段突出显示整个节点.你必须调整它才能突出显示边框,如果这是你正在寻找的.
免责声明:
此代码直接取自Xcode在打开新游戏(SceneKit
)项目时创建的模板代码.