Is there a way to configure TracballControls in threejs to restrict movement to only two axes, specifically pan and tilt without roll? I am looking for a solution that can achieve this functionality. Here is the link to my current code: . The desired behavior for mouse movement should resemble this example: .
Here is a solution that worked for me:
If you're facing an issue, check your TrackballControl.js file and make the following change on line 148:
before:
_this.object.up.applyQuaternion( quaternion );
after:
_this.object.up.applyQuaternion( new THREE.Vector4(0,0,0,1) );
//Note: This fix applies to older versions only.
Even though this information may be outdated, I wanted to share how I successfully implemented it since it remains the top search result on Google.
To prevent rolling (locking the z-axis), you can stop rotateCamera() from modifying the camera's Up vector.
To achieve this, simply comment out the following line (approximately line 200):
_this.object.up.applyQuaternion(quaternion);
If desired, you can also restrict the camera's rotation vector by adding either:
_this.object.rotation.z = 0;
or
_this.object.rotation.set(0, 0, 0);
to the end of the function. However, in my experience, this adjustment didn't have a significant impact since most of the rotation occurs due to the camera's movement in relation to its lookAt target (_this.target in the trackballControls.js file).
After making some adjustments, I modified the variable
this.noPan
at line 26 to be set as false. I also uncommented
_this.object.up.applyQuaternion( quaternion );
Additionally, I raised the value of
this.dynamicDampingFactor = 0.2;
to 0.8.
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