Merge pull request #9139 from CesiumGS/fix-classification-artifact

Extend far plane slightly to prevent clipping
CesiumGS · Sep 5, 2020 · 2202fd0 · 2202fd0
2 parents b84b70a + b062edf
commit 2202fd0
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diff --git a/CHANGES.md b/CHANGES.md
@@ -6,6 +6,7 @@
 
 - Fixed an issue where the camera zooming is stuck when looking up. [#9126](https://github.com/CesiumGS/cesium/pull/9126)
 - Fixed an issue where Plane doesn't rotate correctly around the main local axis. [#8268](https://github.com/CesiumGS/cesium/issues/8268)
+- Fixed an issue where ground primitives would get clipped at certain camera angles. [#9114](https://github.com/CesiumGS/cesium/issues/9114)
 
 ### 1.73 - 2020-09-01
 

diff --git a/Source/Scene/View.js b/Source/Scene/View.js
@@ -126,6 +126,9 @@ function updateFrustums(view, scene, near, far) {
   var is2D = scene.mode === SceneMode.SCENE2D;
   var nearToFarDistance2D = scene.nearToFarDistance2D;
 
+  // Extend the far plane slightly further to prevent geometry clipping against the far plane.
+  far *= 1.0 + CesiumMath.EPSILON2;
+
   // The computed near plane must be between the user defined near and far planes.
   // The computed far plane must between the user defined far and computed near.
   // This will handle the case where the computed near plane is further than the user defined far plane.