koobas.hobune.stream
Firing a curtain of bullets
I'm making a 2D shooter and wanted to know how to fire a curtain of bullets like in a bullet hell game from a single object. I'm trying to figure out how to alter a normal firing code to spread out in a fan shaped or random pattern if possible.
Edit: Code for firing //Fire rate of shots(Every # seconds, fire 1 shot) var fireRate: float =1.0; //Time to start shooting private var nextFire: float = 0.0;
function Awake() { // set our starting x position originalX = transform.position.x; } function Update(){ //Move forward //transform.position.x += 1 * speed * Time.deltaTime; // if the user just pressed the "Shoot" button down (edit->project settings->input) & if the time since the game started is greater than the next fire time //As long as the time the game starts and the fire rate = nextFire and is less the Time.time, it'll fire.
if(Input.GetButton("Shoot")&&Time.time > nextFire)
{ audio.Play(); // create a shot, to the right of us (so it doesn't clip into our collision), with 90 degrees rotation nextFire = Time.time + fireRate; //Instantiate(Shot, transform.position + Vector3.right*2, Quaternion.Euler(0, 0, 90));
Fire();
}
var BulletPrefab: GameObject; var bulletSpeed = 100;
function Fire(){ var rotation : Quaternion = Quaternion.identity; rotation.eulerAngles = Random.insideUnitSphere; var bullet : GameObject; bullet = Instantiate(BulletPrefab,transform.position,rotation); bullet.rigidbody.velocity = bullet.transform.forward*bulletSpeed; }
If you are using particles for bullets you can use the random velocity setting.
If you are using rigid bodies for bullets you can use Random.insideUnitSphere to get a random direction for it to travel in.
e.g.
var BulletPrefab: GameObject; var bulletSpeed = 100;
function Fire(){ var rotation : Quaternion = Quaternion.identity; rotation.eulerAngles = Random.insideUnitSphere; var bullet : GameObject; bullet = Instantiate(BulletPrefab,transform.position,rotation); bullet.rigidbody.velocity = bullet.transform.forward*bulletSpeed; }
If you wanted the bullets to move in a pattern then you can set the angle using some kind of math equation. Even very simple equations can result in interesting looking patterns. e.g. if you increment the y-rotation of the bullet fired by 10 degrees every frame they'll fan out like a spiral. If you then have a second set of bullets with their y-rotation incrementing in the opposite direction you'll get a double spiral that crosses over each other.
EDIT:
Changed rigid body to game object.
E.g. Maths:
yRotation : float = 0;
function IncrementAngle(){ yRotation += 5; if(yRotation>359){ yRotation = -359; } }
I'm getting an InvalidCastException: Cannot cast from source type to destination type. Can you give an example of the math formula as well? $$anonymous$$ath has never been my strong point.
this error came up: Actor::setLinearVelocity: Actor must be (non-kinematic) dynamic!
Also where do I put the math code? The update function moves it but can't have coroutines
That error means your bullet doesn't have a non-kinematic rigid body. You can put the increment code where ever you want.
Okay, I figured out that to make bigger changes in firing range I need to add to the random like this: rotation.eulerAngles = Random.insideUnitSphere * 25;
I mean how do I implement the math part, In the bullet script, in the player script?
Do I place Yrotation somewhere in the Instintate?
