DEJA_ Vu3d - cesium feature set 053 underground mode effect

Preface  

The main purpose of writing this column is to understand the work based on Cesium Integrate the realized functions , Have their own thinking and realization , There are also references to other great God finishing implementation , After preliminary calculation, there are almost small 130 About functions , The follow-up will also continue to add , So I'm going to spend a week 2-3 Update this column with a better look （ Keep the code as concise as possible ）. If there are errors or improvements in the content of the blog , I also hope to communicate with you here to improve .

More / Examples /demo explain ：DEJA_VU3D Complete function Directory

Introduce

The content of the column should be as concise as possible , In this article, we will introduce the system based on Cesium Realize the effect of underground mode . The effect is shown in the figure

Cesium The underground mode function effect of is very simple , call Cesium Regular interface is OK . I don't say much nonsense , Go straight to the code

Key code

Underground mode on and off

viewer.scene.screenSpaceCameraController.enableCollisionDetection = !bool; // Collision detection between camera and terrain 
viewer.scene.globe.translucency.frontFaceAlphaByDistance =
  new Cesium.NearFarScalar(1.5e2, 0.5, 8.0e6, 1.0);
viewer.scene.globe.transluce