Is there a way to avoid setting a negative position.y for a THREE.PerspectiveCamera?
I have implemented a customized TrackballControl that limits camera rotation on the z-axis, but I still want to ensure that my camera remains elevated above the "ground"
Imagine you're working with 2 cameras in a scene. One camera is controlled by TrackballControls, while the other one is solely for rendering purposes. Below is an example of how the render loop would operate:
controls.update();
camera2.position.copy( camera.position );
if ( camera2.position.y < 0 ) camera2.position.y = 0;
renderer.render( scene, camera2 );
Check out THREE.OrbitControls, a solution that maintains the camera's orientation without any tricky workarounds.
If you opt for THREE.OrbitControls and need to limit the camera's angle to stay above the ground, a simple adjustment is necessary.
Within the function OrbitControls.update(), swap out this line:
phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );
with this updated line:
phi = Math.max( EPS, Math.min( Math.PI/2 - EPS, phi ) );
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