Depth plane and depthTestAgainstTerrain

omar · September 18, 2020, 3:12pm

The best workaround I can think of here is keep depthTestAgainstTerrain = true and use clipping planes to clip out a section of the globe that the tileset occupies, which is the 3rd workaround discussed in this thread: How to get more zoom level on 3D Tiles with Terrain

Instead of manually defining the clipping planes, you could generate them such that they roughly cover the bounding rectangle of your tileset. This code example may be helpful:

github.com

CesiumGS/cesium/blob/9366729c1eb79f5caaf7c8f70df2e65a5e8f7961/Apps/Sandcastle/gallery/development/Many Clipping Planes.html#L134


var planeEntities = [];
var selectedPlane;

function updatePlanes() {
  for (var i = 0; i < clippingPlanes.length; i++) {
    var plane = clippingPlanes[i];
    plane.distance = cylinderRadius * radiusMultiplier;
  }
}

function computePlanes() {
  var stepDegrees = Cesium.Math.TWO_PI / steps;
  clippingPlanes = [];

  for (var i = 0; i < steps; i++) {
    var angle = i * stepDegrees;
    var dir = new Cesium.Cartesian3();
    dir.x = 1.0;
    dir.y = Math.tan(angle);
    if (angle > Cesium.Math.PI_OVER_TWO) {
      dir.x = -1.0;

Topic		Replies	Views
Possible depth test issue where globe renders over 3D tiles CesiumJS	8	592	May 29, 2019
Bug: seam if using depthTestAgainsTerrain:false CesiumJS	2	251	August 6, 2021
How to prevent 3D Tiles from being occluded by terrain without setting scene.globe.depthTestAgainstTerrain = false? CesiumJS	1	61	October 31, 2024
How to get more zoom level on 3D Tiles with Terrain CesiumJS	3	2297	September 8, 2020
Globe depth test disable CesiumJS	5	700	June 21, 2021

Depth plane and depthTestAgainstTerrain

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