[Note: The code on the github example does not calculate the gradient on a pixel basis. The code on the github example calculates the gradient on a points basis. -Fattie] The code is working in pixels. First, it fills a simple raster bitmap buffer with the pixel color data. That obviously has no notion of … Read more
As explained in the Advances in SceneKit Rendering session from WWDC 2016, SceneKit now defaults to rendering in linear space which is required to have accurate results from lighting equations. The difference you see comes from the fact that in the MetalKit case you are providing color components (red, green and blue values) in the … Read more
Updated: October 08, 2022. TL;DR This post is not only about RealityKit, SceneKit & Metal, but also about related APIs and USD files. RealityKit 2.0 RealityKit (and RealityFoundation) is the youngest SDK in Apple family of rendering technologies. This high-level framework was released in 2019. RealityKit is made for AR / VR projects, has simplified … Read more
Scene Reconstruction Pity but I am still unable to capture model’s texture in realtime using the LiDAR scanning process. Neither at WWDC20 nor at WWDC22 Apple announced a native API for that (so texture capturing is only possible now using third-party APIs – don’t ask me which ones 🙂 ). However, there’s good news – … Read more
Your original question: Does H.264 encoded video with BT.709 matrix include any gamma adjustment? The encoded video only contains gamma adjustment – if you feed the encoder gamma adjusted values. A H.264 encoder doesn’t care about the transfer characteristics. So if you compress linear and then decompress – you’ll get linear. So if you compress … Read more