fix(viewer-lib): Fixes two issues regarding very small scale streams (#…

…3930)

- The orbit controller would not properly report changes in camera movement on a per frame basis becuase of a hardcoded epsilon which was not small enough for very small scenes. Now the epsilon is dynamically computed
- WASD-ing would jitter in very small scenes because of a too large normalization value sent to the position dampers. Now that value is also dynamically computed for small scenes

packages/viewer-sandbox/src/main.ts

@@ -475,8 +475,10 @@ const getStream = () => {
     // 'https://latest.speckle.systems/projects/db06488e1c/models/21f3930771'
 
     // FAR OFF
-    // // 'https://app.speckle.systems/projects/bdd828221e/models/eb99326dc3'
-    // 'https://latest.speckle.systems/projects/5e9c38fae7/models/d44c54b6b7'
+    // 'https://app.speckle.systems/projects/bdd828221e/models/eb99326dc3'
+
+    // SUPER TINY
+    // 'https://latest.speckle.systems/projects/6631c0378c/models/4fed65a49c'
 
     // v2 colored lines
     // 'https://app.speckle.systems/projects/052b576a45/models/c756235fcc'

packages/viewer/src/modules/extensions/controls/FlyControls.ts

@@ -183,7 +183,8 @@ class FlyControls extends SpeckleControls {
 
   protected updatePositionRotation(delta: number) {
     const diagonal = this.world.worldBox.min.distanceTo(this.world.worldBox.max)
-    const minMaxRange = diagonal < 1 ? diagonal : 1
+    /** For very small values, the dampners need even smaller normalization */
+    const minMaxRange = diagonal < 1 ? this.world.getRelativeOffset(diagonal) : 1
     this.position.x = this.positionXDamper.update(
       this.position.x,
       this.goalPosition.x,

packages/viewer/src/modules/extensions/controls/SmoothOrbitControls.ts

@@ -862,9 +862,16 @@ export class SmoothOrbitControls extends SpeckleControls {
     const mat = this.orbitSphere.material as SpeckleBasicMaterial
     mat.userData.billboardPos.value.copy(spherePos)
 
+    /** We'd rather have a palpable epsilon for regular sized streams, but also
+     *  compute a custom one for microscopic ones
+     */
+    const epsilon = Math.min(
+      MOVEMENT_EPSILON,
+      this.world.getRelativeOffset(MOVEMENT_EPSILON)
+    )
     return (
-      lastCameraPos.sub(this._targetCamera.position).length() > MOVEMENT_EPSILON ||
-      lastCameraQuat.angleTo(this._targetCamera.quaternion) > MOVEMENT_EPSILON
+      lastCameraPos.sub(this._targetCamera.position).length() > epsilon ||
+      lastCameraQuat.angleTo(this._targetCamera.quaternion) > epsilon
     )
   }