fix: Camera rotation target from new camera position

examples/src/utils/CustomCameraManager.ts

@@ -48,7 +48,12 @@ export class CustomCameraManager implements CameraManager {
     const target =
       state.target ??
       (state.rotation
-        ? CameraManagerHelper.calculateNewTargetFromRotation(this._camera, state.rotation, this._controls.target)
+        ? CameraManagerHelper.calculateNewTargetFromRotation(
+            this._camera,
+            state.rotation,
+            this._controls.target,
+            position
+          )
         : this._controls.target);
 
     this._camera.position.copy(position);

viewer/packages/camera-manager/src/CameraManagerHelper.ts

@@ -37,12 +37,14 @@ export class CameraManagerHelper {
    * @param camera Used camera instance.
    * @param rotation New camera rotation in quaternion form.
    * @param currentTarget Current camera target.
+   * @param position New camera position.
    * @returns
    */
   static calculateNewTargetFromRotation(
     camera: THREE.PerspectiveCamera,
     rotation: THREE.Quaternion,
-    currentTarget: THREE.Vector3
+    currentTarget: THREE.Vector3,
+    position: THREE.Vector3
   ): THREE.Vector3 {
     const distToTarget = currentTarget.clone().sub(camera.position);
     const tempCam = camera.clone();
@@ -54,7 +56,7 @@ export class CameraManagerHelper {
       .getWorldDirection(new THREE.Vector3())
       .normalize()
       .multiplyScalar(distToTarget.length())
-      .add(tempCam.position);
+      .add(position);
 
     return newTarget;
   }

viewer/packages/camera-manager/src/DefaultCameraManager.ts

@@ -212,7 +212,8 @@ export class DefaultCameraManager implements CameraManager {
         ? CameraManagerHelper.calculateNewTargetFromRotation(
             this._camera,
             state.rotation,
-            this._controls.getState().target
+            this._controls.getState().target,
+            newPosition
           )
         : this._controls.getState().target);
 

viewer/packages/camera-manager/tests/CameraManagerHelper.test.ts

@@ -20,7 +20,7 @@ describe(CameraManagerHelper.name, () => {
     // creates rotation around Y axis of 180 degrees.
     const rotation = new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0, 1, 0), Math.PI);
 
-    const newTarget = CameraManagerHelper.calculateNewTargetFromRotation(camera, rotation, target);
+    const newTarget = CameraManagerHelper.calculateNewTargetFromRotation(camera, rotation, target, camera.position);
 
     expect(newTarget.x).toBeCloseTo(target.x);
     expect(newTarget.y).toBeCloseTo(target.y);

viewer/reveal.api.md

@@ -251,7 +251,7 @@ export class CameraManagerHelper {
         target: THREE_2.Vector3;
     };
     static calculateNewRotationFromTarget(camera: THREE_2.PerspectiveCamera, newTarget: THREE_2.Vector3): THREE_2.Quaternion;
-    static calculateNewTargetFromRotation(camera: THREE_2.PerspectiveCamera, rotation: THREE_2.Quaternion, currentTarget: THREE_2.Vector3): THREE_2.Vector3;
+    static calculateNewTargetFromRotation(camera: THREE_2.PerspectiveCamera, rotation: THREE_2.Quaternion, currentTarget: THREE_2.Vector3, position: THREE_2.Vector3): THREE_2.Vector3;
     static updateCameraNearAndFar(camera: THREE_2.PerspectiveCamera, combinedBbox: THREE_2.Box3): void;
 }