That intersection is called a hit and determining whether a hit has occurred is a hit test. Ray casting means calculating the intersection between the pointer ray and a surface in the real world. The method for doing this is called ray casting.
Magic window reality definition how to#
# Ray casts, hit tests, and reticlesĪ key problem to solve when implementing augmented reality is how to place objects in a real-world view. The AR application tells you whether the couch fits your space and how it will look next to your other furniture. Imagine a furniture shopping site that lets you place a couch in your living room. The Chacmool example is educational but it could just as easily be commercial. The important thing for this discussion is that when you place the Chacmool statue in augmented reality, you're seeing its size as though it were actually in the room with you. A companion article describes this demo in detail. The video here shows an educational demo that we built called Chacmool. One thing that demo and video doesn't show is how AR can convey the size of a real object. If you don't have a device that can run the demo, check out the video link at the top of this article.
If you're not sure what I mean by all of that, it will become clear when you use the demos. This gives viewers a deeper understanding of the object than is possible with a two dimensional image. Once placed, the image stays on the selected surface, appears the size it would be if the actual item were on that surface, and allows the user to move around it as well as closer to it or farther from it.
They allow users to place a life-size representation of an object as if in reality. For example, it can help people learn on education sites, and allow potential buyers to visualize objects in their home while shopping. # What's it useful for?Īugmented reality will be a valuable addition to a lot of existing web pages. Speaking of IO, if you want to hear more about the immersive web in general, where it is, where it's going check out this video. If you build demonstrations with this new API, prepare for this question. This may be obvious to you since you're reading this on a website devoted to the web. "What app do I need to install?" "There is no special app. "Do I need a special browser?" "It's just the web." "What Chrome extension do I need to install?" "There's no extension. I said something repeatedly to developers and non-developers alike during those three days that I wish I had known to put in my immersive web article: "It's just the web." Please excuse our construction debris.Īt Google IO this year, we demonstrated augmented reality with an early build of Chrome. Note: Some of the Immersive Web Community Group's existing demos, specifically the ones using magic windows, do not work with the WebXR Hit Test turned on. With these, you can dive into the demos or try out our codelab. Two Chrome flags (chrome://flags): WebXRDevice API (#webxr) and WebXR Hit Test (#webxr-hit-test).
Magic window reality definition android#
A compatible smartphone running Android O or later.We want a protracted testing period because this is a very new API proposal and we want to make sure it's both robust and right for developers.Īside from Chrome Canary, you'll also need: This API is intended to stay in Canary for the immediate future.
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