Interested in tutorial on how to achieve table-top view of Cesium in AR (with Hololens)

[DanSynthetaic]

Hi team! I’ve been struggling trying to achieve a table-top view of the Cesium world specifically for Hololens (as in the demo shown a while back).

In the demo, using Unreal’s MRTK for Hololens, it shows a view of the world scaled and manipulated in augmented reality (zooming in/out and dragging the map within the confines of a table). I’ve tried playing with the GraphicsTools from Microsoft (using the Clipping Primitives system), but sadly have not been able to achieve the desired results.

My assumption is after I can effectively clip out all terrain outside a box, I would need to reorient/scale the CesiumWorldTerrain actor to align the world surface to synchronize with a “table-top” surface in world-space? Absolutely stumped how you got that to work.

Would make for a GREAT tutorial…

(Specifically trying to achieve a result similar to this demo: Sébastien Lozé on LinkedIn: #UnrealEngine )

[agallegos]

Hello,

You’re right - this would make a great tutorial. I’ll see what I can do, but it may be a little bit until I’m able to focus on it.

In the meantime, here are a few posts that may be able to help you out -

Modifying Map scale in Unreal

I’ve just started playing around with the examples, and reading through the tutorials, but it looks like the display is designed as a 1-1 ratio, one CM in the world maps to 1 CM in Unreal. Is there a way to change the scale to match a map. My primary use case is in VR, and I wanted to take advantage of VRs scaling options, have a room with a ‘map table’ which displays a scale model of a section of the world and have the option to have the user transition to a 1-1 scale version, either ground le…

Modifying Cesium tiled imagery

I’m not with cesium, but I cloned the material from their plugin folder and managed to make a modification. I ended up clonging GltfMaterialWIthOverlays, RasterOverlay and GlftMaterial making my own version. Once I did that I could overlay it onto the material from the Terrain and it took my modifications. I haven’t done extensive modifications to it yet, but was able to mask the globe down into a small square using a box mask.

We’re also working on a spline-based clipping feature to clip out terrain. That feature is still in development, but may be helpful in your case - Clipping 2.5d by nithinp7 · Pull Request #446 · CesiumGS/cesium-unreal · GitHub