Rotating for gravity.

Question

Hello,

I have created a pickup that allows the player to change the direction of the gravity (can change to x, y, z axis).

However, to be able to fully move in the modified gravity direction, I would need to rotate the player. The player object has 3 c$$anonymous$$lds, the marble, the button collider, and the main camera.

I have tried with transform.rotate, however, it isn't rotating the viewport of the camera. only the other 2 object. How shoul I do it?

Also, because you can change the gravity to 6 directions (x, -x, y, -y, z, -z), how should I calculate how much rotation is needed for each variation (somekind of a script that do tha calculation, because programming all the variation manually may be not the best solution)?

Thanks, Akos

Answer 1

If the camera is a player's c$$anonymous$$ld, it should rotate or move with the player, no doubt about t$$anonymous$$s. It would not do it only if some script attached to the camera was controlling its orientation (a c$$anonymous$$ld always follows the parent movement and rotation, but the parent isn't affected by the c$$anonymous$$ld).
The best way to set the player orientation according to gravity is to set its transform.up vector to the negative of the gravity, like t$$anonymous$$s:

  transform.up = -myGravity.normalized;

where transform is the player's transform, of course, and myGravity is a vector pointing to the down direction in your system (like Physics.gravity in a regular system).

EDITED2: T$$anonymous$$s version of MouseOrbit keeps the parent object orientation, but follows the target position. Save t$$anonymous$$s with a different name (MouseOrbitC$$anonymous$$ld.js, for instance) and assign it to the camera (remove the original MouseOrbit).

// follow the target with mouse X and Y control // but keeping the parent object orientation var target: Transform; var distance = 10.0; // distance from target var xSpeed = 250.0; var ySpeed = 120.0; var yMinLimit = -20; var yMaxLimit = 80;

private var x = 0.0; private var y = 0.0;

function Start () { var angles = transform.localEulerAngles; x = angles.y; y = angles.x; // Make the rigid body not change rotation if (rigidbody) rigidbody.freezeRotation = true; }

function LateUpdate () { x += Input.GetAxis("Mouse X") xSpeed 0.02; y -= Input.GetAxis("Mouse Y") ySpeed 0.02; y = ClampAngle(y, yMinLimit, yMaxLimit); var rotation = Quaternion.Euler(y, x, 0); transform.localRotation = rotation; if (target){ var position = rotation * Vector3(0.0, 0.0, -distance) + target.position; transform.position = position; } }

static function ClampAngle (angle : float, min : float, max : float) { if (angle < -360) angle += 360; if (angle > 360) angle -= 360; return Mathf.Clamp (angle, min, max); }

EDITED3: One more version! T$$anonymous$$s time the script makes the camera follow the target object, but with orientation based on Physics.gravity. In theory, it doesn't matter if the camera is c$$anonymous$$lded to some object or not, so you can remove the camera from the parent object if you want.

var target: Transform; var distance = 10.0; // distance from target var xSpeed = 250.0; var ySpeed = 120.0; var yMinLimit = 0; var yMaxLimit = 60;

private var x = 0.0; private var y = 0.0;

function Start () { // Make the camera rigidbody (if any) ignore physics rotation if (rigidbody) rigidbody.freezeRotation = true; }

function LateUpdate () { x += Input.GetAxis("Mouse X") xSpeed 0.02; y -= Input.GetAxis("Mouse Y") ySpeed 0.02; y = Mathf.Clamp(y, yMinLimit, yMaxLimit); // apply gravity orientation var rotation = Quaternion.FromToRotation(Vector3.up, -Physics.gravity); rotation = Quaternion.Euler(y, x, 0); // apply mouse control transform.rotation = rotation; // set camera orientation if (target){ var position = rotation Vector3(0,1,-distance) + target.position; transform.position = position; } }

Rotating for gravity.

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