Shoot at an angle 2D

Questions & Answers
1

i have a 2D game, using the x,y axes to move around the screen and a player that shoots bullets torwards the screen.

i got different scripts for the missile script, either addForce to the bullet or make the position of the bullet go towards the mouse

Now how to i make it so i shoot at an angle like instead of shooting one bullet directly towards the mouse when i level up i shoot instantiate 2 bullets at a fixed angle away from the mouse position?
thx u

//Calcualtes where the mouse is on the scren
var mousePos : Vector3 = Input.mousePosition;
mousePos.z =- (transform.position.z - Camera.mainCamera.transform.position.z - 14);
var worldPos : Vector3 = Camera.mainCamera.ScreenToWorldPoint(mousePos);
var targetDelta = (worldPos - transform.position);

//Shoot torwards mouse
var Missile : Rigidbody = Instantiate(MissilePrefab, transform.position, Quaternion.identity);
var targetDelta = (worldPos - transform.position);
var launchVelocity = targetDelta.normalized * MissileSpeed;
Missile.velocity = launchVelocity;

OR this is another way of shooting towards the mouse if u prefer that way

var Missile : Rigidbody = Instantiate(MissilePrefab, transform.position, transform.rotation);
Missile.rigidbody.AddForce(targetDelta * 300);

EDIT

This is the new code which DOES shoot at an angle but the closer the mouse pointer the slower the bullet speed, i think i had this problem b4 but didnt notice it somehow O_x
i get its because the mouse position changes and im multiplying it to the distance of the mouse position, just dunno how to fix that.

var eulerAngles : Vector3;

in UPDATE Function()

//Calcualtes where the mouse is on the screen
var mousePos : Vector3 = Input.mousePosition;
mousePos.z =- (transform.position.z - Camera.mainCamera.transform.position.z - 14);
var worldPos : Vector3 = Camera.mainCamera.ScreenToWorldPoint(mousePos);

EDIT again(my bad i put worldPos instead of targetDelta here which was wrong)
EDIT yet AGAIN :slight_smile: :slight_smile: :slight_smile: :slight_smile: cause I FIXED IT!! woot!
used targetDelta.normalized and it works, which is surprising since im dont rly know wat it does and it was my 1st guess which i didnt even know where i should have started xDDDD

var force : Vector3 = (targetDelta.normalized * 800);

//Instantiate one bullet 20 degrees right of the mouse
eulerAngles.z = -20;
var newForce : Vector3 = Quaternion.Euler(eulerAngles) * force;
var Missile : Rigidbody = Instantiate(MissilePrefab, transform.position, transform.rotation);
Missile.rigidbody.AddForce(newForce);

//Instantiate one bullet 20 degrees left of the mouse
eulerAngles.z = 20;
newForce = Quaternion.Euler(eulerAngles) * force;
Missile = Instantiate(MissilePrefab, transform.position, transform.rotation);
Missile.rigidbody.AddForce(newForce);
2

The easiest way would be to put an offset in your AddForce script! There are a few ways of doing this, but the one I like involves taking the rotation from another transform in the scene-

// this should be set in the inspector.
public Transform bulletAngleOffset;

Vector3 force = whatever you set it to;

// This rotates the force by the angle offset object's local rotation.
Vector3 newForce = bulletAngleOffset.localRotation * force;

bullet.rigidbody.AddForce(newForce);

EDIT:

Alternatively,

// At the top
public Vector3 eulerAngles;

// in your shooty script
Vector3 force = whatever;
Vector3 newForce = Quaternion.Euler(eulerAngles) * force;

// now use newForce to shoot things however you would have used force

Alternatively alternatively,

// at the top
var eulerAngles : Vector3;

// in your shooty function
var force : Vector3 = whatev;
var newVorce : Vector3 = Quaternion.Euler(eulerAngles) * force;

// and so on.

Then you don't have to worry about putting in a new transform, but you have to know exactly what angle you want it to shoot at.

3

Anyway im posting the answer here for anyone thats interested, thx to syclamoth for the help and so far this script seems to work perfectly fine, now i can sleep soundly tonight knowing i managed to fix it :stuck_out_tongue:

//Calcualtes where the mouse is on the screen
var mousePos : Vector3 = Input.mousePosition;
mousePos.z =- (transform.position.z - Camera.mainCamera.transform.position.z - 14);
var worldPos : Vector3 = Camera.mainCamera.ScreenToWorldPoint(mousePos);

var force : Vector3 = (targetDelta.normalized * 800);

//Instantiate one bullet 20 degrees right of the mouse
eulerAngles.z = -20;
var newForce : Vector3 = Quaternion.Euler(eulerAngles) * force;
var Missile : Rigidbody = Instantiate(MissilePrefab, transform.position, transform.rotation);
Missile.rigidbody.AddForce(newForce);

//Instantiate one bullet 20 degrees left of the mouse
eulerAngles.z = 20;
newForce = Quaternion.Euler(eulerAngles) * force;
Missile = Instantiate(MissilePrefab, transform.position, transform.rotation);
Missile.rigidbody.AddForce(newForce);