Goal: Detect when the cursor has entered a defined radius of the player.
Hello, I am in the process of trying to replicate the combat system from a game called CrossCode. The idea is that when the cursor is within a certain radius of the player, I will be able to switch to melee combat, and back to ranged once the cursor leaves this radius.
I have implemented one way I thought it could be done, however it feels slow or unreliable and I just wanted to know if there are any other methods I could possibly look into to achieve a smoother result.
Here is what I've done
attached to the player
void Update()
{
attackStyleSwitchRadius = colRef.radius;
playerCenter = colRef.transform.position;
if(Physics2D.OverlapCircle(playerCenter, attackStyleSwitchRadius, cursor))
{
meleeMode = true;
rangeMode = false;
}
else
{
meleeMode = false;
rangeMode = true;
}
}
And on a small 2D object I have this script so that it follows the cursor position.
void Update()
{
pos = Input.mousePosition;
gameObject.transform.position = Camera.main.ScreenToWorldPoint(pos);
}
when the small object enters the overlap circle it changes the bools around.
You can remove the collision detection overhead by doing something like this instead;
void Update ()
{
attackStyleSwitchRadius = colRef.radius;
playerCenter = colRef.transform.position;
var mouse = Input.mousePosition;
mouse.z = Vector3.Distance(Camera.main.transform.position, playerCenter);
var range = Vector2.Distance(Camera.main.ScreenToWorldPoint(mouse), playerCenter);
var inside = range < attackStyleSwitchRadius;
meleeMode = inside;
rangeMode = !inside;
}
Cursor
Make an object, name it cursor.
Add a small collider to the cursor object.
Add a script to the cursor object so its always at the mouses location.
Melee range zone
Add a GameObject as child of the player, name it MeleeRangeZone.
Add a collider to it, set it to be a Trigger. The size of this collider will be the players melee range,
Add a rigidbody to it so that collisions can be detected, but set the rigidbody to not rotate or change its position.
Add a script to the object and use the OnTriggerEnter and OnTriggerExit methods to detect whether or not the cursor has entered your melee zone.
You can now use the OnTriggerEnter and OnTriggerExit methods to switch between the players attack modes, meaning that when the cursor enters it changes to melee and when it exit it changes to ranged.
You can fire the ray to detect the location the cursor should have like this:
public LayerMask RaycastCollidableLayers;
public RaycastHit Hit;
public float CheckDistance = 200f;
public Transform Cursor;
void PerformRaycast(){
//Set up ray
ray = Camera.main.ScreenPointToRay(Input.mousePosition);
//Fire ray
Physics.Raycast(ray, out Hit, CheckDistance + 0.1f, RaycastCollidableLayers);
if (Hit.collider == null)
{
//Debug.Log("Raycast hit nothing");
return;
}
else //Ray hit something
{
//Move cursor to Hit.point;
Cursor.position = Hit.point;
}
}
Related
I'm creating a basic pool game in Unity with C#, what im trying to do is that if the cue ball is moving, the stick will disappear, and once it becomes stationary again, it will reappear to where the cue ball is located. This is my code so far:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class stickDeplacement : MonoBehaviour
{
public bool bIsOnTheMove = false;
Vector3 lastPos;
public GameObject Stick;
void Start()
{
}
void Update()
{
var stick = Instantiate(Stick, gameObject.transform.position, gameObject.transform.rotation);
if (this.transform.position != lastPos)
{
Destroy(stick);
Debug.Log("Is moving");
}
else
{
Debug.Log("Is not moving");
}
lastPos = this.transform.position;
}
}
But what happens is that the ball, along with the stick, will just spasm and be buggy right from the start (when I open and play the game). Am I missing something here?
This is extremely inefficient and dangerous!
Why instantiate a stick every frame just to eventually already destroy it in that very same frame? And if the ball is stationary you want an additional stick to be spawned every frame?
Instead of all the time instantiating and destroying it at all you should rather keep one stick and only (de)activate it.
In your case you could do this in a single line
bIsOnTheMove = transform.position == lastPos;
stick.SetActive(!bIsOnTheMove);
Also I doubt a lot you would like the stick to have the same rotation as a rolling ball! Of course this will behave awkward
Most certainly you do not simply want to clone the ball's orientation. I would e.g. try to determine the closest point of the table edge to the current ball's position (iterate through the wall colliders and use Collider.ClosestPoint) and let the stick face the direction from that edge point towars the ball position (+ maybe an offset in X so the stick is slightly inclined by default).
And finally you anyway do not want to assign that rotation every frame, since you most probably later want your users to be able to rotate that stick. You only want to apply this once when the ball becomes stationary.
Something like e.g.
// The stick is not a prefab anymore but simply always exists in the scene!
[SerializeField] private Transform stick;
[SerializeField] private Vector3 eulerOffset;
[SerializeField] private Collider[] wallColliders;
public bool bIsOnTheMove;
private Vector3 lastPos;
private void Start()
{
lastPos = transform.position;
}
private void Update()
{
// is the ball currently moving?
var isMoving = transform.position == lastPos;
last Post = transform.position;
// Did this state change since the last frame?
if(bIsOnTheMove == isMoving) return;
bIsOnTheMove = isMoving;
// (de)activate the stick accordingly
stick.gameObject.SetActive(!isMoving);
// Do this ONCE when ball becomes stanionary
if(!isMoving)
{
var ballPosition = transform.position;
// among the wall colliders find which one is closest to the ball
Vector3 closestPoint;
var smallestDistance = float.PositiveInifinity;
foreach(var wall in wallColliders)
{
var edgePoint = wall.ClosestPoint(ballPosition);
var distane = (edgePoint - ballPosition).sqrMagnitude;
if(distance < smallestDistance)
{
closestPoint = point;
smallestDistance = distance;
}
}
// then make the stick look towards the ball from that edge
var direction = ballPosition - closestPoint;
var rotation = Quaternion.LookRotation(direction);
// optional add the offset
rotation *= Quaternion.Euler(eulerOffset);
stick.rotation = rotation;
}
}
want to make a game where there is a 2D ball which moves to the position of the cursor. To get the position of the cursor, I use this code:
Vector2 PixelPos = Input.mousePosition;
Then to convert the screen position to world position I use this code:
Vector2 Pos = Camera.main.ScreenToWorldPoint(PixelPos);
The problem is that the main camera move up so that if forces the player to move. But when it move I get some weird movement with the ball.(as the camera is moving up it is always moving the ball)
Is there an alternate way to make this work??
Or more simply can I replace this piece of code:
Vector2 Pos = Camera.main.ScreenToWorldPoint(PixelPos);
with some other things which does not require a camera to convert the screen positions to world position?
Thanks!
Since you want the cursor to be moved only by the player and to be updated relative to world space, not screen space, you need to implement a virtual cursor that exists in world space.
First, create your virtual cursor as a GameObject. On Update you can update its position with
float sensitivity = 1f;
transform.position += sensitivity * new Vector2(
Input.GetAxis("Mouse X"),
Input.GetAxis("Mouse Y")
);
Then, instead of using the camera to find the cursor position, you just check the `transform.position` of that virtual cursor `GameObject`.
Second, you'll need to lock the built-in cursor. You can do that with
Cursor.lockState = CursorLockMode.Locked;
If you need to undo that (for instance, if you bring up a menu, and need to use the regular cursor without moving the virual cursor around), then you can use:
Cursor.lockState = CursorLockMode.None;
or, if you need the cursor to stay in the window:
Cursor.lockState = CursorLockMode.Confined;
If you only want to move the ball to the last position clicked/touched then here is an easier solution.
Keep track of the goal position for the ball, and if one has been set yet:
private Vector2 moveGoalPos;
private bool moveGoalSet= false;
Only change moveGoalPos on frames where the mouse is clicked/the screen is touched.:
bool isTouched;
if (isMouseEnable) {
isTouched = Input.GetMouseButtonDown(0);
PixelPos = Input.mousePosition;
} else {
isTouched = Input.touchCount > 0;
Touch touch = Input.GetTouch(0);
PixelPos = touch.position;
}
if (isTouched) {
moveGoalPos= Camera.main.ScreenToWorldPoint(PixelPos);
moveGoalSet= true;
}
However, on every frame, you'll want to move the ball to the world space moveGoalPos (only if a goal has been set):
if (moveGoalSet) {
Vector2 OffsetPos = moveGoalPos + CursorOffSet;
GCursor.transform.position = OffsetPos;
print(OffsetPos);
Vector2 LerpPos = Vector2.Lerp(rb.transform.position, OffsetPos, 0.05f);
rb.MovePosition(LerpPos);
}
When you need to stop the ball from moving to the last touched/clicked position (for instance, if you change or reset a level), you'll need to reset moveGoalSet:
moveGoalSet = false;
I have a sphere in that is moving foward and I need it to follow my finger smoothly when it swipes on the screen but only in the x axis.
I trying to make the exact movent like Rolling Sky, Color Road
The ball Should follow my finger when it swipes in the x axis and move smoothly.
Just like in the games I mention before.
I try OnMouseDrag and a lot of ways but it dont work correctly beacuse it dont dont follow the finger or it dont move while finger is swiping.
From what I understand, it seems you want to get the position of the user's finger and move the ball accordingly?
You could achieve this with Touch.position
Example:
private void Update()
{
Touch touch = Input.GetTouch(0); // Get the touch data for the first finger
Vector2 position = touch.position; // Get the position in screen-space
Vector3 worldPosition = Camera.main.ScreenToWorldPoint(position); // Convert the position to world space
Vector3 ballPosition = ball.transform.position;
ball.transform.position = new Vector3(worldPosition.x, ballPosition.y, ballPosition.z); // Move the ball
}
I think you should handle the input separately from the sphere.
Put this on a script to detect the swiping on the screen.
bool inputBegan = false;
Vector2 beganPosition;
void Update()
{
if (!inputBegan && Input.GetMouseButtonDown (0))
{
inputBegan = true;
beganPosition = Input.mousePosition;
}
else if (inputBegan && Input.GetMouseButtonUp (0))
{
//If you want a threshold you need to change this comparison
if (beganPosition.x > Input.mousePosition)
{
MoveBallLeft ();
}
else
{
MoveBallRight ();
}
inputBegan = false;
}
}
The movement of the balls you can achieve it adding or substracting Vector2.right * movingDistance to the sphere Transform if you want it to teleport or making the sphere move slowly using a targetPosition and currentPosition and each Update cycle add a little bit of transform distance.
I solved it doing this and setting the variable NavigationMultiplier to 10000
I'm trying new things and I'm stuck to find a way to drag and drop objects. My player is a square and he have a hand attached. Here is an example:
That red thing in the arm is the "hand", when I press shift it turns green. I made the detection like a ground check. Here is the code:
void Update () {
touch = Physics2D.OverlapCircle(touchDetect.position, 0.01f, objectLayer);
mao1.SetBool("Ligado", ligado);
if (Input.GetKey(KeyCode.LeftShift)) {
ligado = true;
} else {
ligado = false;
}
}
The touchDetect is working fine, because he turns to "true" when touches the box:
My question is: I don't know how to put in the script that I want him to grab the object and drop when I want to. If I need to use Raycast, how would the code looks like?
In order to "grab" an object in unity, simply set the transform.parent of the gameobject you wish to grab, to the transform of the gameobject you wish to grab it with.
For example, in your code you are using Physics2D.OverlapCircle which returns a Collider2D object. You can use that collider to grab on to your gameobject.
Collider2D touch = Physics2D.OverlapCircle(touchDetect.position, 0.01f, objectLayer);
if (Input.GetKey(KeyCode.LeftShift) && touch != null)
{
//grab on to the object
touch.gameObject.transform.parent = this.transform;
//if your box has a rigidbody on it,and you want to take direct control of it
//you will want to set the rigidbody iskinematic to true.
GetComponent<Rigidbody2D>().isKinematic = true;
}
else if( touch != null)
{
//let the object go
touch.gameObject.transform.parent = null;
//if your object has a rigidbody be sure to turn kinematic back to false
GetComponent<Rigidbody2D>().isKinematic = false;
}
Just place a GameObject with SprieRender component attach it to hand tip.
Put this script to that qube and follow what I commented
using UnityEngine;
using System.Collections;
public class collid : MonoBehaviour {
// Use this for initialization
public Sprite mySprite; // Put Here that Qube Sprite
public GameObject Cursorimg; // Put the gameobject here from hierarchy
void Start () {
mySprite = GetComponent<SpriteRenderer>().sprite;
}
// Update is called once per frame
void Update () {
if(Collide conditions) {
Debug.Log(" Collide ");
Cursorimg.GetComponent<SpriteRenderer>().sprite = mySprite;
Cursorimg.GetComponent<SpriteRenderer>().sortingOrder = 3;// U change based on your option
}
if(DropCondition)
{
Debug.Log("Drop");
Cursorimg.GetComponent<SpriteRenderer>().sprite =null;
}
}
If this not works Here is a script that gameobject with Sprite will follow mouse position,
Vector3 pos = Input.mousePosition;
pos.z = Cursorimg.transform.position.z - Camera.main.transform.position.z;
Cursorimg.transform.position = Camera.main.ScreenToWorldPoint(pos);
this code follows in update and Cursorimg is Gameobject
I think This would help you, Let me know further
I have the following code, but i'm having some problems. Every time update is called, the character move to the point i give him to. But i just give him a point when i click with the mouse on the ground, the problem starts when i try to make it animate the character.
If i pass the value of the animation on the clickToMove() method it'll always play that animation even if we aren't moving. And if i place clickToMove inside the "if clicked" the character will teleport and not move towards. I can't think in a way to do the animation properly, only when the object is moving, and goes back to idle when it's stopped, even if the clickToMove() is playing all the time.
using UnityEngine;
using System.Collections;
public class ClickScript : MonoBehaviour
{
public float moveSpeed;
public float minDistance;
Vector3 mouseClick; //Creates a variable to save the constant of the hit from raycast
private Animator anim;
private Rigidbody rigidB;
// Use this for initialization
void Start()
{
anim = GetComponent<Animator>();
rigidB = GetComponent<Rigidbody>();
}
// Update is called once per frame
void FixedUpdate()
{
if (Input.GetMouseButtonDown(1))//If clicked
{
clickPosition(); //Gets the click position
}
if (Vector3.Distance(transform.position, mouseClick) > minDistance) //If the click distance is bigger than the minimal
{
//It is allways moving, but since there's no click position it doesn't move when not clicked
clickToMove();
}
}
void clickPosition()//This function throw a raycast on the ground and save the position on mouseClick to make the char move to there
{
RaycastHit clickHit; //creates a constant with the infos from the raycast
Ray mouseClickPosition = Camera.main.ScreenPointToRay(Input.mousePosition); //creates a constant to save the mouse position
if (Physics.Raycast(mouseClickPosition, out clickHit, 100.00f))//throw a raycast returning the mouse position and more infos
{
Debug.Log("Click at " + clickHit.point); //Show where were clicked
mouseClick = clickHit.point;//mouseClick receive the position of the click
}
}
void clickToMove() //this function make the player look at the click and move to mouseClick
{
mouseClick.y = transform.position.y; //get rid of the y to fix rotation bugs
transform.LookAt(mouseClick);//look at the poit you clicked
transform.position = Vector3.MoveTowards(transform.position, mouseClick, moveSpeed * Time.deltaTime);//move to the clickpoint
}
}
How about this way?
bool _isAnimating = false;
// Update is called once per frame
void FixedUpdate()
{
if (Input.GetMouseButtonDown(1))//If clicked
{
clickPosition(); //Gets the click position
//start animation here!!!
//animator.SetBool("bWalk", false);
//and set animation state to true
_isAnimating = true;
}
if (Vector3.Distance(transform.position, mouseClick) > minDistance)
{
clickToMove();
}
else if(_isAnimating)
{
//turn off the animation here!!!
//animator.SetBool("bStop", false);
//and set to false
_isAnimating = false;
}
}