fix cylinder impostor clipping near camera

CHANGELOG.md

@@ -7,6 +7,7 @@ Note that since we don't clearly distinguish between a public and private interf
 ## [Unreleased]
 
 - Optimize inter unit bond compute
+- Fix cylinder impostor clipping near camera (#831)
 
 ## [v3.35.0] - 2023-05-14
 

src/mol-gl/shader/cylinders.vert.ts

@@ -72,7 +72,7 @@ void main() {
     gl_Position = uProjection * mvPosition;
 
     if (gl_Position.z < -gl_Position.w) {
-        mvPosition.z -= 2.0 * (length(vEnd - vStart) + vSize); // avoid clipping
+        mvPosition.z -= length(vEnd - vStart) + 2.0 * vSize; // avoid clipping
         gl_Position.z = (uProjection * mvPosition).z;
     }