Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/Vector3DTilePolylinesVS.glsl

@@ -0,0 +1,22 @@
+in vec4 currentPosition;
+in vec4 previousPosition;
+in vec4 nextPosition;
+in vec2 expandAndWidth;
+in float a_batchId;
+
+uniform mat4 u_modifiedModelView;
+
+void main()
+{
+    float expandDir = expandAndWidth.x;
+    float width = abs(expandAndWidth.y) + 0.5;
+    bool usePrev = expandAndWidth.y < 0.0;
+
+    vec4 p = u_modifiedModelView * currentPosition;
+    vec4 prev = u_modifiedModelView * previousPosition;
+    vec4 next = u_modifiedModelView * nextPosition;
+
+    float angle;
+    vec4 positionWC = getPolylineWindowCoordinatesEC(p, prev, next, expandDir, width, usePrev, angle);
+    gl_Position = czm_viewportOrthographic * positionWC;
+}