diff --git a/viewer/animatedvec3.js b/viewer/animatedvec3.js
index cdb1d102..22d67492 100644
--- a/viewer/animatedvec3.js
+++ b/viewer/animatedvec3.js
@@ -28,7 +28,7 @@ export class AnimatedVec3 {
                 t = 1;
                 b = true;
             }
-            vec3.lerp(this.tmp, this.a, this.b, t);
+            vec3.cerp(this.tmp, this.a, this.b, t);
             if (b) {
                 if (this.t2) {
                     this.t0 = this.t1;
@@ -73,4 +73,4 @@ export class AnimatedVec3 {
     }
 }
 
-AnimatedVec3.ACTIVE_ANIMATIONS = 0;
\ No newline at end of file
+AnimatedVec3.ACTIVE_ANIMATIONS = 0;
diff --git a/viewer/glmatrix/vec3.js b/viewer/glmatrix/vec3.js
index 21b423e8..f8a0e059 100644
--- a/viewer/glmatrix/vec3.js
+++ b/viewer/glmatrix/vec3.js
@@ -399,6 +399,27 @@ export function lerp(out, a, b, t) {
   return out;
 }
 
+/**
+ * Performs a cosine interpolation between two vec3's
+ *
+ * @param {vec3} out the receiving vector
+ * @param {ReadonlyVec3} a the first operand
+ * @param {ReadonlyVec3} b the second operand
+ * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
+ * @returns {vec3} out
+ */
+export function cerp(out, a, b, t) {
+  let ax = a[0];
+  let ay = a[1];
+  let az = a[2];
+
+  let delta = (1-Math.cos(t*Math.PI))/2;
+  out[0] = ax + delta * (b[0] - ax);
+  out[1] = ay + delta * (b[1] - ay);
+  out[2] = az + delta * (b[2] - az);
+  return out;
+}
+
 /**
  * Performs a hermite interpolation with two control points
  *
diff --git a/viewer/viewer.js b/viewer/viewer.js
index 1134a73c..a9427eaa 100644
--- a/viewer/viewer.js
+++ b/viewer/viewer.js
@@ -204,7 +204,7 @@ export class Viewer {
     callByType(method, types, ...args) {
         let elems = types.map((i) => this.viewObjectsByType.get(i) || [])
             .reduce((a, b) => a.concat(b), [])
-            .map((o) => o.oid);
+            .map((o) => o.uniqueId);
         // Assuming all passed methods return a promise
         return method.call(this, elems, ...args);
     }