xcode 将背景图像添加到 ScnScene
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Adding background image to ScnScene
提问by snksnk
I have an app which uses SpriteKit and emitter particles (sks) which I find to be not as realistic as Scene kit's particles (scnp). So I wish to incorporate that into SKScene but I'm not sure if that is even possible. So I decided to create an SCNScene and particles(scnp). However I want to add a background image and the only 3D effect would be the particles. Can anyone help me set a background image to my SCNScene. Traditionally I would add it like this to an SKScene but I could not find any help online for the SceneKit.
我有一个使用 SpriteKit 和发射器粒子 (sks) 的应用程序，我发现它不如 Scene kit 的粒子 (scnp) 逼真。所以我希望将它合并到 SKScene 中，但我不确定这是否可能。所以我决定创建一个 SCNScene 和粒子（scnp）。但是我想添加一个背景图像，唯一的 3D 效果就是粒子。谁能帮我为我的 SCNScene 设置背景图像。传统上，我会像这样将它添加到 SKScene，但我无法在线找到 SceneKit 的任何帮助。
let backgroundNode = SKSpriteNode(imageNamed: "backgroundImage")
backgroundNode.size = view.frame.size
backgroundNode.position = CGPointMake(view.frame.size.width/2, view.frame.height/2)
self.addChild(backgroundNode)
Thank you in advance
先感谢您
回答by Kusal Shrestha
let scnScene = SCNScene()
scnScene.background.contents = UIImage(named: "earth.jpg")
回答by Jonny
Basically the same answer as @Kusal Shrestha, but I was able to put a gradient background using a bunch of different technologies. Still very simple and useful.
与@Kusal Shrestha 的答案基本相同，但我能够使用一系列不同的技术设置渐变背景。仍然非常简单和有用。
const CGFloat DIVISOR = 255.0f;
CIColor *bottomColor = [CIColor colorWithRed:(CGFloat)0xee / DIVISOR green:(CGFloat)0x78 / DIVISOR blue:(CGFloat)0x0f / DIVISOR alpha:1];
CIColor *topColor = [CIColor colorWithRed:0xff / DIVISOR green:0xfb / DIVISOR blue:0xcf / DIVISOR alpha:1];
SKTexture* textureGradient = [SKTexture textureWithVerticalGradientofSize:scnview.frame.size topColor:topColor bottomColor:bottomColor];
UIImage* uiimageGradient = [UIImage imageWithCGImage:textureGradient.CGImage];
self.background.contents = uiimageGradient;
Where "self" is a subclass of SCNScene.
其中“self”是 SCNScene 的子类。
This example requires the category on texture from here: https://gist.github.com/Tantas/7fc01803d6b559da48d6
此示例需要来自此处的纹理类别：https: //gist.github.com/Tantas/7fc01803d6b559da48d6
回答by Amal T S
I tried using @Kusal Shresthas answer. However the image was not loading when I put the image file in scnassets. But when I put the file in xcassets, it worked.
我尝试使用@Kusal Shresthas 的答案。但是，当我将图像文件放入scnassets. 但是当我把文件放进去时xcassets，它起作用了。
scnScene.background.contents = UIImage(named: "earth")
