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What is the default zoom level in cesium?
Cesium’s default view is a 3D globe with a perspective view. A typical 2D zoom level number doesn’t fully describe the different resolutions that Cesium’s camera can see. Take a minute to read my full answer to Determining the Map Scale of the Viewed Globe for a better explanation.
How does explicit rendering improve performance in cesium?
Improved performance with explicit rendering means you can run Cesium apps without worries of kicking your laptop fan into high gear or draining battery life on mobile devices. Starting with Cesium 1.42, a new opt-in explicit rendering mode allows the developer to precisely control the rendering in Cesium based on the needs of the application.
How is the performance of cesium in chrome?
However, when Cesium is idle, CPU usage is greatly reduced. For instance, using Chrome developer tools, CPU usage in an idle Cesium scene averaged 25.1%, but after enabling the performance improvement, it now averages 3.0%. This was measured on a laptop with an Intel i7 processor, running in Google Chrome.
How can I reduce the CPU usage of cesium?
Enable requestRenderMode to reduce the overall amount of time Cesium renders a new frame and to decrease Cesium’s overall CPU usage in your application. You can also make these adjustments to the scene after the viewer is created.
Is there a plugin for the cesium map?
This is a Cesium plugin that adds to the Cesium map a user friendly compass, navigator (zoom in/out), and distance scale graphical user interface. Why did you build it? First of all the Cesiumjs sdk does not include a compass, navigator (zoom in/out) nor distance scale.
How to get scene change events in cesium?
In addition to the answer https://stackoverflow.com/a/42044819/3092437 you probably want to set viewer.camera.percentageChanged to some small value close to 0 (but with 0 value camera tends to generate change events all the time). I use 0.001, it gives pretty good events frequency at all zoom levels.
Where to find compass and distance scale in cesium?
The compass, navigator, and distance scale will appear on the right side of te map. This plugin was successfully tested on Cesium version 1.27. It works great with Cesium in 3D mode.
How to determine the map scale of the viewed Globe?
Take a minute to read my full answer to Determining the Map Scale of the Viewed Globe for a better explanation. EDIT 1: The camera.getMagnitude function gets the “magnitude of the camera’s position” which really means the distance to the center of the Earth.
How to get the magnitude of the camera’s position?
EDIT 1: The camera.getMagnitude function gets the “magnitude of the camera’s position” which really means the distance to the center of the Earth. This is probably not what you want, instead you want the altitude of the cartographic position.