Swift SceneKit 也不是圆形球体

Posted 2023-03-23

【中文标题】Swift SceneKit 也不是圆形球体

【英文标题】：Swift SceneKit nor rounded sphere

【发布时间】：2021-08-27 05:29:54

【问题描述】：

我添加了一个球体节点，但是当我旋转节点（从触摸）时，球体的边缘不平滑。有没有办法解决这个问题？

在 X 上旋转时一切都很好，但在 Y 球体上不平滑:(

sceneView.scene = scene

cameraOrbit = SCNNode()
cameraNode = SCNNode()
camera = SCNCamera()

// camera stuff
camera.usesOrthographicProjection = true
camera.orthographicScale = 5
camera.zNear = 1
camera.zFar = 100

cameraNode.position = SCNVector3(x: 0, y: 0, z: 70)
cameraNode.camera = camera
cameraOrbit = SCNNode()
cameraOrbit.addChildNode(cameraNode)
scene.rootNode.addChildNode(cameraNode)

let sphere = SCNSphere(radius: 2)
sphere.firstMaterial?.diffuse.contents = UIColor.red
let earthNode = SCNNode(geometry: sphere)
earthNode.name = "sphere"
earthNode.geometry?.materials = [blueMaterial]
scene.rootNode.addChildNode(earthNode)
earthNode.rotation = SCNVector4(0, 1, 0, 0)

let lightNode = SCNNode()
let light = SCNLight()
light.type = .ambient
light.intensity = 200
lightNode.light = light
scene.rootNode.addChildNode(lightNode)

sceneView.allowsCameraControl = true
sceneView.backgroundColor = UIColor.clear
sceneView.cameraControlConfiguration.allowsTranslation = true
sceneView.cameraControlConfiguration.rotationSensitivity = 0.4

【问题讨论】：

developer.apple.com/documentation/scenekit/scnsphere谈segmentCount：developer.apple.com/documentation/scenekit/scnsphere/…

geodesic 属性也可以带来更好的结果。

@Shadowrun 谢谢！

【参考方案1】：

你也可以细分你的几何：

node.geometry.subdivisionlevel = 2 // Don't make that more than 3!

注意：这将消耗更多内存，因为几何现在包含更多顶点（网格数据）