In theory HD Cast Pro offers a direct casting mode, reflecting everything happening on the screen of the phone or tablet across to the projector. The app is comprehensive-and correspondingly complicated. It turns the projector into an HD Cast Pro device, able to connect in various ways with Android and iOS devices running Optoma’s HD Cast Pro app. Optoma offers a tiny USB wireless dongle for the ML750ST. Five additional Content Packs can be bought as in-app purchases at £2.99 each. There are two other free Content Packs to download: Music and Retail. It’s supplied as a regular circle-the Daliesque distortions are my own manipulation of the clock’s control points. It’s a component in the freely downloadable Content Pack called Home. You can’t see from the static picture above, but some of the available patterns are animated. You can apply the shapes in layers, sending them to the background, the foreground and relative positions in between. Once you’ve tailored the shape on your map to fit the real world target, you can fill it with patterns and colour them by picking from a colour wheel. The basic shapes are a rectangle you can reshape into any kind of trapezium using its four corner control points a similarly mouldable triangle and circle and-most flexible of all-a rectangle with bezier-curvable sides. You start by choosing a roughly suitable shape from the Projection Mapper menu, positioning it over your selected target area, and pulling at the control points until it fits the real life object. The areas are marked out on the phone screen and on the target by bright white lines, with control points indicated by small circles with crosses in the middle. As the phone’s screen is mirroring everything to the projector, the areas will show up on the target as you edit them on the phone. Pull up the Projection Mapper app and use it to delineate the individual areas for your map. Link the phone’s screen display to the projector and point the projector onto the set of surfaces you want to map to. The phone is the Wileyfox Spark 2 X from the Spark 2 range we recently reviewed here. It produces a 100″ (diagonal) image from just 3ft away. The ML750ST is a pocket-sized short-throw LED projector with a very wide angle lens. The tools: an Optoma ML750ST, a Googlecast HDMI dongle and an Android phone running Optoma’s Projection Mapper app. But on day one I was able to come up with the colourful domestic scene (my living room sofa) in the picture. I WAS STARTING FROM SCRATCH, so my efforts are distinctly amateur league. Of course, you’ll need a projector, but you have one already, right? (If not, why not? They’re cheap enough, and where else can you get a 120″ screen for around £600 or less?) Also required are a phone or tablet and Optoma’s Projection Mapper app. Each surface can be given a flat colour, a texture, a pattern or even a moving image. The projected scene can be tailored so that each surface receives its own individual image. The shapes can be a collection of everyday objects, or specially constructed forms with (usually) white or light-coloured surfaces. Instead of projecting a coherent picture onto a flat surface, as you do when watching a movie or giving a slide show, the output is directed at a target of three-dimensional shapes, painting each shape individually. You may have seen it at exhibitions or concerts. I can’t say it’s high on my list of life-essentials, but projection mapping is certainly a lot of fun. The UnRAID Story: The Prasanna Addendum.The UnRAID Story (Chapter 4): Time to Cache In.The UnRAID Story (Chapter 3): More Room for Data.The UnRAID Story (Chapter 2): Getting Even.Opinion: Why there is only one FreeCell.Opinion: The Paralysis of Positive Thinking.Data Sheet: The X-plore on the Shield Gotcha.Data Sheet: Low Energy Audio and the Future of ASHA.Data Sheet: Dust and your DLP Projector.Data Sheet: DeBloating the Huawei P30 Pro.
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