Sceneekit＆＃x2013;加载HDR或EXR照明环境无效

发布于 2025-01-21 04:35:31 字数 590 浏览 1 评论 0 原文

我尝试加载 .hdr 文件将其用作Skybox并使用其照明信息。这是我使用的代码：

backgroundColor = UIColor.gray 
// check if a default skybox is added

let environment = UIImage(named: "studio_small_09_2k.hdr")
scene?.lightingEnvironment.contents = environment
scene?.lightingEnvironment.intensity = 1.0
scene?.background.contents = environment

不幸的是，我收到一个灰色屏幕，也没有错误。有没有在Scenekit中使用HDR文件的经验？

XCode版本：13.2.1 iOS版本：15.3.1 hdr文件： https://polyhaven.com/a/studio_small_09

原文

I tried loading an .hdr file to use it as a skybox and use its lighting informations. This is the code I used:

backgroundColor = UIColor.gray 
// check if a default skybox is added

let environment = UIImage(named: "studio_small_09_2k.hdr")
scene?.lightingEnvironment.contents = environment
scene?.lightingEnvironment.intensity = 1.0
scene?.background.contents = environment

Unfortunately I recieve a grey screen and also no errors. Has anyone experience in using hdr files in SceneKit?

XCode Version: 13.2.1
iOS version: 15.3.1
hdr file: https://polyhaven.com/a/studio_small_09

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沙与沫 2025-01-28 04:35:31

我通常使用，其中6张图像中的每一个为Square （height == width）。

另外，支持以下立方体映射表示：

垂直条作为单个图像（高度== 6 *宽度）
水平条作为单个图像（6 * height == width）
球形投影作为单个图像（2 * height ==宽度）

这是SwiftUI代码：

func makeUIView(context: Context) -> SCNView {

    let sceneView = SCNView(frame: .zero)
    sceneView.scene = SCNScene()
    // if EXR or HDR is 2:1 spherical map, it really meets the requirements
    sceneView.scene?.lightingEnvironment.contents = UIImage(named: "std.exr")
    sceneView.backgroundColor = .black
    sceneView.autoenablesDefaultLighting = true
    sceneView.allowsCameraControl = true
    
    let node = SCNNode()
    node.geometry = SCNSphere(radius: 0.1)
    node.geometry?.firstMaterial?.lightingModel = .physicallyBased
    node.geometry?.firstMaterial?.metalness.contents = 1.0
    sceneView.scene?.rootNode.addChildNode(node)
    return sceneView
}

特别注意 - 您需要。基于照明模型以获得HDR或EXR反射。

让我们为BG设置它：

sceneView.scene?.background.contents = UIImage(named: "std.exr")

为什么您的 .exr 不起作用？

解决方案很简单：从项目中删除您的 .exr ，然后清空垃圾，然后拖放 .exr file，in 选择用于添加这些文件的选项窗口选择添加到目标：

现在您的 .exr 必须工作。

I usually use a Cube Texture Set, where each of 6 images is square (height == width).

Also, the following cube map representations are supported:

Vertical strip as single image (height == 6 * width)
Horizontal strip as single image (6 * height == width)
Spherical projection as single image (2 * height == width)

Here's a SwiftUI code:

func makeUIView(context: Context) -> SCNView {

    let sceneView = SCNView(frame: .zero)
    sceneView.scene = SCNScene()
    // if EXR or HDR is 2:1 spherical map, it really meets the requirements
    sceneView.scene?.lightingEnvironment.contents = UIImage(named: "std.exr")
    sceneView.backgroundColor = .black
    sceneView.autoenablesDefaultLighting = true
    sceneView.allowsCameraControl = true
    
    let node = SCNNode()
    node.geometry = SCNSphere(radius: 0.1)
    node.geometry?.firstMaterial?.lightingModel = .physicallyBased
    node.geometry?.firstMaterial?.metalness.contents = 1.0
    sceneView.scene?.rootNode.addChildNode(node)
    return sceneView
}

Pay particular attention – you need .physicallyBased lighting model to get HDR or EXR reflections.

And let's set it for BG:

sceneView.scene?.background.contents = UIImage(named: "std.exr")

Why your .exr doesn't work?

The solutions is simple: delete your .exr from project, empty the Trash and after that drag-and-drop .exr file, in Choose options for adding these files window choose Add to targets: