如何在ARKit和SceneKit中正确缩放DAE模型? [英] How to scale DAE models correctly in ARKit and SceneKit?

问题描述

我目前正在尝试合并以下来源:

I'm currently trying to combine the following sources:

Apple SceneKit车辆演示，分别.它的Swift版本， ARKit示例，和每个项目的工作都像一个魅力(尽管我更改了车辆演示，以便可以通过屏幕上的按钮控制汽车).

Each project on its own works like a charm (although I changed the vehicle demo so that the car can be controlled by on-screen buttons).

现在，当我尝试将两个项目结合在一起以创建增强现实赛车游戏时，我遇到了有关汽车.dae模型尺寸的问题:它太大了.

Now, when I try to combine both projects to create an augmented reality racing game, I run into problems regarding the size of the .dae model of the car: it's too big.

我可以使用(底盘)节点的 .scale 属性缩放模型，但是一旦添加 SCNPhysicsVehicle 属性和行为，汽车就会重置(?)到其原始大小.我试图在Xcode中缩放模型(打开dae文件，更改比例)，但是其边界框保持不变-告诉我重新缩放无法正常进行.

I can scale the model using the (chassis) nodes .scale property, but as soon as I add the SCNPhysicsVehicle properties and behaviour, the car gets reset(?) to its original size. I tried to scale the model in Xcode (open dae file, change scale), but its bounding box remains the same - that tells me that the rescaling didn't work properly.

有任何提示吗?

推荐答案

1)，您可以直接通过art.scnassets缩放dae模型.

1)you can scale the dae models by art.scnassets directly.

art.scnassets->car.dae->节点检查器->转换->缩放对象

2)可以通过 SCNAction

let scene = SCNScene(named: "art.scnassets/cup.dae")!
let node = scene.rootNode.childNode(withName: "cup", recursively: true)!
let action = SCNAction.scale(by: sender.scale, duration: 1.0)
node.runAction(action)

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