Why does the camera at position(0, 0, -1) and lookAt(0, 0, 1) quaternion display as (_x: -3.141592653589793, _y: 0, _z: -3.141592653589793)? This output seems to be contrary to the typical object behavior.
I attempted to create a group with the same position(0, 0, -1) and lookAt(0, 0, 1), using quaternion values of (_x: -0, _y: 0, _z: -0). Both objects should be similar, so why are the results different?
When it comes to orientation in Three.js, an Object3D "looks down" its positive z-axis, while a Camera "looks down" its negative z-axis. This distinction is crucial for positioning objects and cameras correctly in a 3D scene.
The difference in direction can be observed in the documentation for Object3D.getWorldDirection() method and Camera.getWorldDirection() method.
For example, placing an Object3D at coordinates (0, 0, 0) means it automatically faces towards (0, 0, 1), but a camera would need to rotate 180º around the y-axis to achieve the same viewpoint.
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