scenekit

问题 I'm new to iPhone app developing, though have experience in graphics programming in OpenGL. I'm creating an iPhone app that I intend to display realistic/high-quality renders within AR. Whilst experimenting with these 3 options, I'm still unsure which of them I should go forward with developing my app's framework around: SceneKit, RealityKit and Metal. I've read that SceneKit is built on top of Metal, but I'm not sure whether its worth the time/effort programming any custom shaders as opposed

问题 I am trying to use projectPoint to get the 2D information of the updated SCNNode in scenekit and save them. Based on ignotusverum's suggestion, I am able to save the SCNNode in to a path in a button. var lastPosition: CGPoint? func renderer(_ renderer: SCNSceneRenderer, didUpdate node: SCNNode, for anchor: ARAnchor) { guard anchor == currentFaceAnchor, let contentNode = selectedContentController.contentNode, contentNode.parent == node else { return } for (index, vertex) in vertices.enumerated

问题 After some testings by printing faceAnchor.transform.columns.3 , digging in SO: ARFaceAnchor have negative Z position? and Apple's documentation: ARFaceAnchor, I realized that the z axis is actually flipped and it is not the right-handed coordinate system as in the documentation. The ARFaceAnchor claims the coordinate: the positive x direction points to the viewer’s right (that is, the face’s own left), the positive y direction points up (relative to the face itself, not to the world), and

问题 After some testings by printing faceAnchor.transform.columns.3 , digging in SO: ARFaceAnchor have negative Z position? and Apple's documentation: ARFaceAnchor, I realized that the z axis is actually flipped and it is not the right-handed coordinate system as in the documentation. The ARFaceAnchor claims the coordinate: the positive x direction points to the viewer’s right (that is, the face’s own left), the positive y direction points up (relative to the face itself, not to the world), and

问题 I am doing this Augmented Reality project starting from Xcode's default AR project. I need to know the focal length of the camera used by ARKit. This page defines Focal Length well: Focal length, usually represented in millimeters (mm), is the basic description of a photographic lens. It is not a measurement of the actual length of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm film at

问题 It's my first time working with Augmented Reality and ARKit. I want to know if I am missing something, I've been looking for a solution for a long time. What I would like to do is sectioning my 3D house horizontally so I can see my house floor by floor or sectioning the house by Y height; like it's shown in these two images from the CAD Exchanger software. I've seen some applications using this tool, but I couldn't find a way to do it. ( PS: I have a 3D house implemented by AutoCAD) Is there

问题 It's my first time working with Augmented Reality and ARKit. I want to know if I am missing something, I've been looking for a solution for a long time. What I would like to do is sectioning my 3D house horizontally so I can see my house floor by floor or sectioning the house by Y height; like it's shown in these two images from the CAD Exchanger software. I've seen some applications using this tool, but I couldn't find a way to do it. ( PS: I have a 3D house implemented by AutoCAD) Is there

问题 It's my first time working with Augmented Reality and ARKit. I want to know if I am missing something, I've been looking for a solution for a long time. What I would like to do is sectioning my 3D house horizontally so I can see my house floor by floor or sectioning the house by Y height; like it's shown in these two images from the CAD Exchanger software. I've seen some applications using this tool, but I couldn't find a way to do it. ( PS: I have a 3D house implemented by AutoCAD) Is there

问题 How do I create a material in SceneKit that plays a looping video? 回答1: It's possible to achieve this in SceneKit using a SpriteKit scene as the geometry's material. The following example will create a SpriteKit scene, add a video node to it with a video player, make the video player loop, create a SceneKit scene, add a SceneKit plane, and finally add the SpriteKit scene as the plane's diffuse material. import UIKit import SceneKit import SpriteKit import AVFoundation class ViewController:

问题 I'd like to build a dissolve in effect for a Scenekit game. I've been looking into shader modifiers since they seem to be the most light weight and haven't had any luck in replicating this effect: Is it possible to use shader modifiers to create this effect? How would you go about implementing one? 回答1: You can get pretty close to the intended effect with a fragment shader modifier. The basic approach is as follows: Sample from a noise texture If the noise sample is below a certain threshold