1. A concise explanation of the problem you’re experiencing.
I need to get the intersection point of a ray from the camera to 3d terrain.
Cesium.IntersectionTest() seem to use only the ellipsoid,
2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
var intersectionPoint = function(){
var ellipsoid = viewer.scene.mapProjection.ellipsoid;
var windowCoordinates = new Cesium.Cartesian2(elmnt.offsetHeight / 2, elmnt.offsetWidth / 2);
var ray = viewer.camera.getPickRay(windowCoordinates);
var intersection = Cesium.IntersectionTests.rayEllipsoid(ray, ellipsoid);
return Cesium.Ray.getPoint(ray, intersection.start);
}
This function return a Cartesian3 with height (from 3d terrain), but not picked in the center of the window.
What I need is to trace a ray from the camera and get the very first intersection with the 3d terrain.
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
I need to rotate the camera around the 1st picked intersection of a ray from the camera (from the center of the window) and the 3d terrain
4. The Cesium version you’re using, your operating system and browser.
1.60