I try to move my character but he moves through the border of the scene.
When I debug it sayscharTransform has 0 0 0 coords in Vector3.
Transform charTransform;
float leftHorizontalBound;
float rightHorizontalBound;
void Start()
{
charTransform = this.transform;
leftHorizontalBound = camera.ViewportToWorldPoint (new Vector3 (0,0, camera.nearClipPlane)).x;
rightHorizontalBound= camera.ViewportToWorldPoint (new Vector3 (1,0, camera.nearClipPlane)).x;
}
void Update()
{
if(charTransform.position.x <= leftHorizontalBound)
{
charTransform.position = new vector2(leftHorizontalBound + 0.1f);
return;
}
if(charTransform.position.x >= rightHorizontalBound)
{
charTransform.position = new vector2(rightHorizontalBound - 0.1f);
return;
}
//MAKE HERE YOUR MOVEMENT BASED ON INPUT.
}
i cant exactly say what is your problem and wish you assume your problem more accurate but i think you are working something like a boad game with a fixed camera and something like a ball always moves and you just want to keep that object in the scene.
in your code you defined a position by variables and made a position check for every frame. thats not what basically is done in unity and there will be problems. you can make an empty object and put in on the borders you want and check the position of that object with your moving object.
your next way is make an object and add a collider component to it. if your game is 3d add a collider and if its 2d game add a 2d collider and a collider to moving object and after that it never moves toward the borders but still there will be some limits so if it didnt work i think you should add a rigidBody to both of them.
Related
I am currently working on a game in Unity and I have a huge problem. I want to draw a level with a tilemap and then move the player on this tilemap. But I want to add an edge collider with the script at the start of the level, because I want to include a Level-Creator in the game. So, I cannot create every collider manual.
Here is an example picture of a "level":
I want to have an edge collider to prevent moving outside the tilemap, but I do not know how to implement that in code. I either cannot find anything helpful on web.
I would be glad about any ideas!
If you get the Collider component of your tilemap, you are able to access the "OverlapPoint" method. With this method you're able to make a basic edge detection system for your custom tile map.
https://docs.unity3d.com/ScriptReference/Collider2D.OverlapPoint.html
What I would do is:
Save Your player's current position in a "lastPosition" variable, check for every update if the corners are inside the collider with the "OverlapPoint" method. If not: do not save the current position but set the current position of the player to the lastPosition variable.
public Vector3 playerSize;
public Collider2d collider;
Vector2 lastPosition;
void Start()
{
lastPosition = transform.position;
}
void Update()
{
if(!collider.OverlapPoint(transform.position) ||
!collider.OverlapPoint(transform.position + playerSize) ||
!collider.OverlapPoint(transform.position + new Vector2(playerSize.x, 0)) ||
!collider.OverlapPoint(transform.position + new Vector2(0, playerSize.y)))
{
transform.position = lastPosition;
}
lastPosition = transform.position;
}
I am currently creating a game in Unity, in which you move a ball around using OnMouseDrag(), a CircleCollider2D and a RigidBody2D. This is how I set the position of the ball:
private void OnMouseDrag()
{
Vector2 mouseInWorld = Camera.main.ScreenToWorldPoint(Input.mousePosition);
playerRb.position = new Vector3(mouseInWorld.x, mouseInWorld.y, 0);
}
I still want the ball to slide on collision while the mouse moves around. Is there a way to do this?
I have tried RigidBody2D.MovePosition(), but the ball jumped around from one point to another, and Raycasts but couldn't get that to work either.
EDIT:
This is what I've got now:
playerRb.velocity = new Vector3(mouseInWorld.x - playerRb.position.x, mouseInWorld.y - playerRb.position.y, 0);
Now the problem is, that the ball lags behind the mousePosition.
When you use RigidBody.MovePosition, you don't call the physics engine and so it ignores collisions. If you want collisions to happen you need to use RigidBody.Velocity instead.
Doing this change will require you to make some change to your code though because what you give to RigidBody.Velocity is a velocity and not a position so you will need to calculate the velocity required in x,y (and z if you are in 3d) to reach your destination.
I invite you to read the Unity page about velocity for more info
https://docs.unity3d.com/ScriptReference/Rigidbody-velocity.html
Note: This will make the player/ball stick to collisions.
Modifying the velocity could cause the ball to bounce around unexpectedly when the ball collides with the wall. I would use a CircleCast for this, check if it hit anything, then use MovePosition accordingly:
float cursorDepth;
Rigidbody2D playerRb;
CircleCollider cc;
void Awake()
{
playerRb = GetComponent<Rigidbody2D>();
cc = GetComponent<CircleCollider>();
}
private void OnMouseDrag()
{
Vector2 mouseInWorld = Camera.main.ScreenToWorldPoint(Input.mousePosition);
Vector2 posToMouse = mouseInWorld - playerRb.position;
RaycastHit2D hit = Physics2D.CircleCast(playerRb.position,
cc.radius * transform.lossyScale.x, posToMouse, posToMouse.magnitude);
if (hit.collider != null)
{
mouseInWorld = hit.centroid;
}
playerRb.MovePosition(mouseInWorld);
}
But notice that if the ball can't move all the way to the mouse, it might cause the drag to end. So, plan accordingly.
I've spent my whole day trying to figure out a problem I'm having with my school project, so I'm off to my last resort: stackoverflow!
My problem:
I'm trying to rotate a character relative to a Camera you can rotate around the character.
input: xbox controller
relevant information:
The camera rotates horizontally around the character, using the right joystick
The character movement happens with the left joystick
The character already moves relative to the Camera, that's working as expected. I'm trying to rotate the character, which happens in a seperate method.
When the left joystick is pulled downwards, the character should always be facing (and moving towards) the camera.
When the left joystick is pulled upwards, the character should always be facing the opposite of (and moving away from) the camera.
I'm leaving a lot of code out, just to keep it readable for you guys. If you need something, just ask and I'll provide.
What I have so far: https://imgur.com/TERUXV6
Why it's wrong: The character rotation is perfect. However, I'm cheating here. The camera rotates according to the world coordinates. As soon as I rotate the camera, this is obvious.
The following script is attached to the Character GameObject.
public class CharacterBehaviour : MonoBehaviour
{
public GameObject HumanoidModel;
[SerializeField]private Transform _mainCameraTransform;
private void Update()
{
ApplyMovement();
RotateCharacter();
}
private void ApplyMovement()
{
//get input movement vector
Vector3 inputMovement = new Vector3(_inputMoveCharacterXAxis, 0, _inputMoveCharacterZAxis);
//make sure camera forward is player movement forward
Vector3 mainCameraForwardXz = Vector3.Scale(_mainCameraTransform.forward, new Vector3(1, 0, 1)); //multiplied by (1, 0, 1) to remove Y component
Vector3 mainCameraRightXz = Vector3.Scale(_mainCameraTransform.right, new Vector3(1, 0, 1)); //multiplied by (1, 0, 1) to remove Y component
Vector3 movementInCameraForwardDirection = mainCameraForwardXz * inputMovement.z;
Vector3 movementInCameraRightDirection = mainCameraRightXz * inputMovement.x;
Vector3 movementForward = movementInCameraForwardDirection + movementInCameraRightDirection;
_velocity = movementForward * MaximumSpeed;
}
private void RotateCharacter()
{
Vector3 inputDirection = new Vector3(_inputMoveCharacterXAxis, 0, _inputMoveCharacterZAxis);
HumanoidModel.transform.LookAt(HumanoidModel.transform.position +
HumanoidModel.transform.forward + inputDirection);
}
The following script is attached to the Main Camera GameObject
public class CameraBehaviour : MonoBehaviour
{
[SerializeField] private Transform _characterTransform;
[SerializeField] private Transform _mainCameraTransform;
private void Update ()
{
RotateCamera();
}
// Rotate camera horizontally
private void RotateCamera()
{
_mainCameraTransform.RotateAround(_characterTransform.position, Vector3.up, _inputRotateCameraHorizontal);
}
}
The source of the problem is in the RotateCharacter() function. I know I need to get some calculations in there to make the character rotation relative to the camera rotation, I just can't figure out what that calculation is, and why.
Thanks in advance!
Thrindil
so heres what you need...
camDefault, a Vector3 for the cameras initial position behind the char.
camCur, a Vector3 for the cameras current position(to track where it is in orbit around the character)
you need to set camDefault in Awake() to the its current position at that time, IE camDefault = cam.transform.position);
then in a fixed update,
camCur= cam.transform.position;
then,
if(Input//your horizontal axis here//==0){
if(camCur!=camDefault){
//translate camera to cam default
cam.tranform.translate(camDefault);
cam.lookat(player.transform.forward);
}
}
keep in mind that some of this is pseudocode, just a general direction. but the unity methods are there. if properly implemented this script will allow you to rotate around your char with right stick, than the camera will slide back behind you when you let go.
I believe, for your sanity, it would be easier to make the camera a direct child of ybot, so it rotates with it and you dont need to do it maually the camera will always stay behind the player. but thats just my opinion. as it sits now, the camera, and the model are children of player, if you want the camera to turn with the player, just make it a child of that model.
in this case, you could store the initial rotation, and current rotation as above, and us your stick to look left and right and then snap back to forward when you let the stick go.
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 want to create a 2D game and for that i need to create a number of rigidbodies 2D that fly in a constant speed without stopping (at least for the start). I created an array of GameObjects and everythink was good (I also created a bounds check).
My problem is that I gave every gameobject an equal velocity that remains equal (every fixedupdate), but for some reason they do not keep moving in a straight line (one gameobject is getting closer to another and away from another gameobject etc).
Here is the physics code:
private void FixedUpdate(){
if (ballsAreMoving) {
foreach(GameObject ball in balls){
ball.gameObject.GetComponent<Rigidbody2D> ().velocity = ball.gameObject.GetComponent<Rigidbody2D> ().velocity.normalized * ballSpeed;
}
}
}
IEnumerator FireBalls() {
foreach(GameObject ball in balls){
////////////////Create ball
ball.transform.position = transform.position;
ball.SetActive(true);
////////////////Realese ball
ball.gameObject.GetComponent<Rigidbody2D> ().velocity = (new Vector2(lineDirection, 10) * ballSpeed);
yield return new WaitForSeconds(shootDelay);// Delay
}
}
The FireBalls function is called once after the balls are created and the ballsAreMoving bool is true after FireBalls is called.
Thanks in advance.