1. A concise explanation of the problem you’re experiencing.
I have just started using Cesium and its sure is an amazing platform and I am just learning the new things as I explore.
The current project I am working on is basically overlaying a CAD (Revit or Infraworks) model on top of a photogrammetric 3D Mesh from a Drone. We have created the Tiled Model in Agisoft and have exported to the Cesium Tiles and imported to the sandcastle. This was just a great experience. However, I have noticed that the quality of the mesh has dropped drastically in the due process. Is there a possible fix for this?
2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
I have not found a code. The images attached shows the result. I am running the basic code as below:
var viewer = new Cesium.Viewer(‘cesiumContainer’);
var tileset = viewer.scene.primitives.add(new Cesium.Cesium3DTileset({
url: ‘…/…/…/Specs/Data/Cesium3DTiles/tileset.json’
// maximumScreenSpaceError: 2,
// maximumNumberOfLoadedTiles: 1000
}));
var heightOffset = -25;
tileset.readyPromise.then(function(tileset) {
console.log(“STARTING!!”);
var boundingSphere = tileset.boundingSphere;
viewer.camera.viewBoundingSphere(boundingSphere, new Cesium.HeadingPitchRange(0, -2.0, 0));
viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
// Position tileset
var cartographic = Cesium.Cartographic.fromCartesian(boundingSphere.center);
var surface = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 0.0);
var offset = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, heightOffset);
var translation = Cesium.Cartesian3.subtract(offset, surface, new Cesium.Cartesian3());
tileset.modelMatrix = Cesium.Matrix4.fromTranslation(translation);
console.log(tileset.modelMatrix);
});
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
As mentioned above, I need to overlay ad CAD Model over a Drone based Reality Mesh. The quality is quite important.
4. The Cesium version you’re using, your operating system and browser.
Cesium 1.58
Windows 10
Google Chrome: Version 75.0.3770.90 (Official Build) (64-bit)