koobas.hobune.stream
Force AddForce AddForceAtPosition Moving Objects According To Rotation
var MoveForce:float = 10;
var xSensitivity : float;
var ySensitivity : float;
var maxHeight : float;
var minHeight : float;
private var xPos : float;
private var yPos : float;
var myTrans : Transform;
var camTrans : Transform;
function Update () {
yPos = Mathf.Clamp(yPos - Input.GetAxis ("Mouse Y") * ySensitivity, minHeight, maxHeight);
xPos = xPos + Input.GetAxis("Mouse X") * xSensitivity;
myTrans.rotation = Quaternion.AngleAxis(xPos, Vector3.up);
camTrans.localRotation = Quaternion.AngleAxis(yPos, Vector3.right);
rigidbody.SetMaxAngularVelocity(10);
var inputVector : Vector3 = Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
rigidbody.AddForce(inputVector * MoveForce, ForceMode.Force);
}
As you can see I use a simple rotation method. Then when you see the var inputVector, that is what stumps me. I will not move according to the direction. Only north south, you get the idea. I do not know whats going on and i have been looking in the reference. I want it to move on the angle by force on the rigidbody. I have x,y,z locked. Is that whats going on? Because I unlocked it too. I'm not using a character controller.
Use
tranform.InverseTransformDirection(dir);
To convert local directions to global coordinates.
For example:
rigidbody.AddForce(tranform.TransformDirection(inputVector * MoveForce), ForceMode.Force);
Instead of the last line.
It's the opposite: TransformDirection converts local to world, and InverseTransformDirection converts world to local!
Don't $$anonymous$$d, almost nobody (including me) remembers who's who!
AddForce uses world space, thus the rigidbody will only move in the world axes. You should transform the inputVector to world space with transform.TransformDirection:
var inputVector: Vector3 = Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
inputVector = transform.TransformDirection(inputVector); // transform
rigidbody.AddForce(inputVector * MoveForce); // ForceMode.Force is the default mode
But be aware that you're applying a force to the rigidbody: the force produces an acceleration while it's being applied, thus removing the force (when you release the controls) will not stop the rigidbody - it will continue moving at its last velocity. You can set a big rigidbody.drag value to make it stop quickly, but this will also affect the vertical direction (it will fall in slow motion).
A possible solution is to implement your own horizontal drag function in FixedUpdate:
var horizontalDrag: float = 0.06; // 0 = no drag, 1.0 = infinite drag
function FixedUpdate(){
var vel = rigidbody.velocity; // get the current velocity...
vel *= 1.0 - horizontalDrag; // apply the drag friction...
vel.y = rigidbody.velocity.y; // but keep the original y velocity
rigidbody.velocity = vel; // then apply it to rigidbody.velocity
}
NOTE: Keep rotations freezed in all axes, or your rigidbody will start spinning after any collision!
