如何将光泽效果应用于3D模型？

Question

我想在3D模型上应用光泽效果，我正在使用SceneKit加载3D模型。我已经应用了metalness和roughness属性，但是它看起来像下面的屏幕快照，并且metalness和roughness在旋转时未更新：

model.capsuleModel.geometry?.firstMaterial?.lightingModel = .physicallyBased
model.capsuleModel.geometry?.firstMaterial?.metalness.intensity = 0.5
model.capsuleModel.geometry?.firstMaterial?.roughness.intensity = 0.5

I want something like this

Answer 1

可以使用以下代码添加光泽效果：

let material = SCNMaterial()
material.locksAmbientWithDiffuse = true
material.lightingModel = .phong
material.diffuse.contents = UIColor.darkGray
material.specular.contents = UIColor.white
material.shininess = 0.1
sceneView.scene?.rootNode.childNodes.first?.geometry?.materials = [material]