I am using the tilt function on a phone to control an object to roll left and right. I do not want it roll anything beyond the screen width.
As in the simple illustration below, the dotted lines represent the width of the screen. The 'O' is the object and the Max signs indicate the maximum point the object is allowed to roll to.
Max--------O--------Max
But currently using my code, the object still rolls out of the screen. Also tried testing both height n width and ended up the same result where the object rolls out of the screen. Please advice what I am doing wrong. Thank you.
public float speed = 10.0F;
void Update()
{
Vector3 dir = Vector3.zero;
dir.x = Input.acceleration.x;
if (dir.sqrMagnitude > 1)
dir.Normalize();
dir *= Time.deltaTime;
if (!(Mathf.Round(dir.x) > Mathf.Round(Screen.width/2)) || !(Mathf.Round(dir.x) < -Mathf.Round(Screen.width/2)))
{
transform.Translate(dir * speed);
}
}
**Updated
public float speed = 10.0F;
void Update()
{
Vector3 dir = Vector3.zero;
dir.x = Input.acceleration.x;
if (dir.sqrMagnitude > 1)
dir.Normalize();
dir *= Time.deltaTime;
//transform.Translate(dir * speed);
if (transform.position.x < 0)
{
transform.position = new Vector3(0, this.transform.position.y, this.transform.position.z);
}
else if (transform.position.x > Screen.width)
{
transform.position = new Vector3(Screen.width, this.transform.position.y, this.transform.position.z);
}
else
{
transform.Translate(dir * speed);
}
}
I think thereare several ways you can go about checking the transfomrs position.
first off if you were using a 2d camera you could use a method like
leftBounds = Camera.x - (Camera.pixelWidth/2);
however because ortho camera angles are not set at any particulare size at x distace from camera they are hard to calculate.
i have seen some instances were coliders on the camera just outside the render rand were placed as camera children
adding a colision mask to only affect the appropriate game object would be best.
Related
So, Hey guys I am new to unity. I have a small doubt. I have a player who is a child of the topcube in a 3 stackcube placed upon eachother.
These cubes have a target position to move once the user clicks on them.
Like imagine there are 3 points in my world. POINT A with location coordinates as(0,0,1),POINT B with (0,0,2),POINT C with (0,0,3) and the 3 stack cube is place on (0,0,0) with the player attached as a child to topcube in that 3stackcube.
All these points(A,B,C) has a script called targetpoint with a variable bool isFilled(default as false) in them which becomes true when one of the cube reaches to its target position.
Further im checking whenever the cubes reaches their target position make isFilled true and check to see if there is a child attached if yes get the animator of the child and trigger jump animation. The jump animation is an inplace animation.
So I want to programmatically move my character +1 towards the direction he is facing (if he is facing z move + 1 in z, if x move +1 in x like this)when the cube he is attached reached its target position while also playing jump animation.
I did a code. it doesnt seem to be working. And sorry for huge paragraphs. Im totally new to coding and asking doubts. Any help will be helpful thanks.
[SerializeField] public List<targetpoint> waypoints;
[SerializeField] float moveSpeed = 2f;
[SerializeField] AudioClip[] surferSounds;
[SerializeField] GameObject particleToPlay;
int waypointIndex = 0;
float t;
//Cached Reference
AudioSource audioSource;
//State
public bool move = false;
void Start()
{
transform.position = this.transform.position;
t = 0f;
}
void FixedUpdate()
{
if (move == true)
{
MoveTarget();
}
}
void MoveTarget()
{
//Time.timeScale = 0.1f;
if (waypointIndex <= waypoints.Count - 1)
{
var targetPosition = waypoints[waypointIndex].transform.position;
transform.position = Vector3.MoveTowards(transform.position, targetPosition, moveSpeed * Time.deltaTime);
if (transform.position == targetPosition)
{
//Debug.Log(t);
if (waypoints[waypointIndex].isFilled == false)
{
waypoints[waypointIndex].isFilled = true;
AudioClip clip = surferSounds[UnityEngine.Random.Range(0, surferSounds.Length)];
var storeToDestroy = Instantiate(particleToPlay, targetPosition, Quaternion.identity);
Destroy(storeToDestroy , 5f);
audioSource.PlayOneShot(clip);
move = false;
}
else if(waypoints[waypointIndex].isFilled == true)
{
waypointIndex++;
targetPosition = waypoints[waypointIndex].transform.position;
transform.position = Vector3.MoveTowards(transform.position, targetPosition, moveSpeed * Time.deltaTime);
}
if (this.gameObject.transform.childCount > 0)
{
var storeChild = gameObject.transform.GetChild(1).gameObject;
StartCoroutine(GravityAndJump(storeChild,storeChild.transform.position+1*transform.forward,1f));
}
else
{
return;
}
}
}
}
IEnumerator GravityAndJump(GameObject child, Vector3 newPosition , float time)
{
var elapsedTime = 0f;
var startingPosition = child.transform.position;
while(elapsedTime < time)
{
child.GetComponent<Animator>().SetTrigger("shouldJump?");
child.transform.position = Vector3.Lerp(startingPosition, newPosition, (elapsedTime / time));
elapsedTime += Time.deltaTime;
yield return null;
}
//storeChild.GetComponent<Animator>().SetFloat("JumpSpeed", 1f);
//yield return new WaitForSeconds(1f);
//gameObject.GetComponentInChildren<Rigidbody>().useGravity = true;
}
}
So I want to programmatically move my character +1 towards the direction he is facing (if he is facing z move + 1 in z, if x move +1 in x like this)
You can get the forward direction for a GameObject using with transform.forward you can use this to calculate target position in front of the GameObject.
Set target position some distance in front of the transform
targetPosition = transform.position + (transform.forward * distance);
Move towards target position at some speed.
transform.position = Vector3.Lerp(transform.position, targetPosition, Time.deltaTime * followSpeed);
Determining arrival to targetPosition
When it comes to determining if transform has arrive to target destination you should measure the distance instead of comparing that the vectors are the same.
So replace this:
if (transform.position == targetPosition){}
With something like this:
if(Vector3.Distance(transform.position, targetPosition) < .001f){
transform.position = targetPosition;
}
Unless you strictly set two vectors to same values it's likely that they will never be considered equal due to how floating point numbers work.
Im trying to make a peice of code that instantiates a gameobject, set its rotation to face the direction of the cursor from the player character at that moment and move towards that direction with constant speed for 2 seconds then stop. However my piece of coded is moving the gameobject towards the cursor direction but the speed gets changed depending on how far my cursor is from the player character.
private IEnumerator Rake()
{
Vector3 relativepos =
Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
Quaternion rotation = Quaternion.LookRotation(relativepos, Vector3.up);
float timepassed = 0;
GameObject WcastRB =
Instantiate(Wcast, gameObject.transform.position, rotation);
Rigidbody2D rg;
rg = WcastRB.GetComponent<Rigidbody2D>();
while (timepassed < 2)
{
timepassed += Time.deltaTime;
rg.velocity = WcastRB.transform.forward * 1000 * Time.deltaTime;
if (timepassed >= 2)
{
rg.velocity = WcastRB.transform.forward * 0;
}
yield return null;
}
}
this is what I have made.
Try this out, I found that because transform.forward was dependent on the object's rotation(and subsequently the original click position).
When the click was too close to the object the transform.forward Vector2 had a magnitude(length) of less than one, causing the speed to slow down.
By increasing the magnitude of the velocity to exactly 1f it should go consistent speeds in all directions
IEnumerator Rake()
{
Vector3 relativepos = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
Quaternion rotation = Quaternion.LookRotation(relativepos, Vector3.up);
float timepassed = 0;
GameObject WcastRB = Instantiate(Wcast, gameObject.transform.position, rotation);
Rigidbody2D rg;
rg = WcastRB.GetComponent<Rigidbody2D>();
Vector2 velocity = rg.transform.forward;
velocity.Normalize();
while (timepassed < 2)
{
timepassed += Time.deltaTime;
rg.velocity = velocity * 1000 * Time.deltaTime;
if (timepassed >= 2)
{
rg.velocity = new Vector2();
}
yield return null;
}
}
Edit:
Removed self-implemented .Normalize() because I forgot that i also used the built in .Normalize() literally right before it.
I am developing a FPS game in Unity and I am wanting to have an agent (an animated bat) strafe around a target.
Everything works fine, but the bat is facing a fixed direction instead of facing the direction of travel as it strafes around the target.
I have tried adding a Quaternion rotation as per the code listed below (see 'Face in the right direction') but to no avail. I have commented out sections of code to see if I can identify where the issue lies, but that just cause more issues.
Any help would be greatly appreciated.
Code...
// Target position. The gameobject will circle around this position.
[SerializeField]
private Vector3 TargetPosition = new Vector3();
// Temp Position. Used to generate a new position on the circle.
private Vector3 tempPosition = new Vector3();
// Radius. Generated from the game objects current distance to the target.
float r;
// The current angle in the circle strafe.
float theta;
/// movement variables
private Vector3 currentTargetPos;
// Start is called before the first frame update
void Start()
{
// Get the radius. The distance to the target position.
r = Vector3.Distance(transform.position, TargetPosition);
// Default theta.
theta = Mathf.Acos((transform.position.x - TargetPosition.x) / r);
// Check quadrant and adjust.
if ((transform.position.x - TargetPosition.x) > 0 &&
(transform.position.y - TargetPosition.y) > 0)
{
Debug.Log("Quadrant 1");
}
if ((transform.position.x - TargetPosition.x) < 0 &&
(transform.position.y - TargetPosition.y) > 0)
{
Debug.Log("Quadrant 2");
}
if ((transform.position.x - TargetPosition.x) < 0 &&
(transform.position.y - TargetPosition.y) < 0)
{
Debug.Log("Quadrant 3");
theta = -theta;
}
if ((transform.position.x - TargetPosition.x) > 0 &&
(transform.position.y - TargetPosition.y) < 0)
{
Debug.Log("Quadrant 4");
theta = -theta;
}
Debug.Log("theta x = " + theta);
}
// Update is called once per frame
void Update()
{
// Get the actors circle strafe location.
tempPosition.x = TargetPosition.x + r * Mathf.Cos(theta);
tempPosition.z = TargetPosition.z + r * Mathf.Sin(theta);
tempPosition.y = transform.position.y;
// Update t.
theta += 0.2f * Time.deltaTime;
// Set the location.
transform.position = tempPosition;
// clear y to avoid up/down movement
currentTargetPos.y = transform.position.y;
Vector3 direction = currentTargetPos - transform.position;
// face in the right direction
direction.y = 0;
Quaternion rotation = Quaternion.LookRotation(-direction, Vector3.up);
transform.rotation = rotation;
}
// Draws debug objects in the editor and during editor play (if option set).
void OnDrawGizmos()
{
// Draw target position.
Gizmos.color = Color.red;
Gizmos.DrawSphere(TargetPosition, 0.2f);
}
}
Unity has a built-in function for transforms called LookAt() that takes a Transform other or Vector3 worldPosition as a parameter. To implement it, you can write transform.LookAt(TargetPosition).
Note that this may impact translations that rely on local rotation, so if you have problems you’ll need to change some logic as well. To circumvent this you may want to reset the rotation before moving, then moving the rotation back to where it needs to be, or better by using world space instead of local space.
I have a scene that my camera doesn't follow my player. When player reaches the end of camera I want player to can't go further (out of camera view). How can I do this?
My codes for movement
public class PlayerBlueController : MonoBehaviour {
public float speed;
private float x;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void FixedUpdate () {
x = Input.GetAxis ("Horizontal") / 100 * speed;
transform.Translate (x,0,0);
}
}
As you can see from this. It gets out of camera's view.
I noticed you used a Collider2D. You should be using Rigidbody2D.MovePosition instead of transform.Translate or you'll likely run into issues when transform.Translate is used.
1.Take the final move position and convert it to new position in ViewPortPoint with Camera.main.WorldToViewportPoint
2.Apply a limit with Mathf.Clamp to the result in #1.
3.Convert the ViewPortPoint back to world point with Camera.main.ViewportToWorldPoint.
4.Finally, move it with Rigidbody2D.MovePosition.
The code below is modified from this answer to include restriction to screen boundary.
Move without Rigidbody:
Use only if collision and physics are NOT required:
public float speed = 100;
public Transform obj;
public void Update()
{
float h = Input.GetAxis("Horizontal");
float v = Input.GetAxis("Vertical");
//Move only if we actually pressed something
if ((h > 0 || v > 0) || (h < 0 || v < 0))
{
Vector3 tempVect = new Vector3(h, v, 0);
tempVect = tempVect.normalized * speed * Time.deltaTime;
Vector3 newPos = obj.transform.position + tempVect;
checkBoundary(newPos);
}
}
void checkBoundary(Vector3 newPos)
{
//Convert to camera view point
Vector3 camViewPoint = Camera.main.WorldToViewportPoint(newPos);
//Apply limit
camViewPoint.x = Mathf.Clamp(camViewPoint.x, 0.04f, 0.96f);
camViewPoint.y = Mathf.Clamp(camViewPoint.y, 0.07f, 0.93f);
//Convert to world point then apply result to the target object
obj.position = Camera.main.ViewportToWorldPoint(camViewPoint);
}
Move Object with Rigidbody2D:
Use if collision and physics are required:
public float speed = 100;
public Rigidbody2D rb;
public void Update()
{
float h = Input.GetAxis("Horizontal");
float v = Input.GetAxis("Vertical");
//Move only if we actually pressed something
if ((h > 0 || v > 0) || (h < 0 || v < 0))
{
Vector3 tempVect = new Vector3(h, v, 0);
tempVect = tempVect.normalized * speed * Time.deltaTime;
//rb.MovePosition(rb.transform.position + tempVect);
Vector3 newPos = rb.transform.position + tempVect;
checkBoundary(newPos);
}
}
void checkBoundary(Vector3 newPos)
{
//Convert to camera view point
Vector3 camViewPoint = Camera.main.WorldToViewportPoint(newPos);
//Apply limit
camViewPoint.x = Mathf.Clamp(camViewPoint.x, 0.04f, 0.96f);
camViewPoint.y = Mathf.Clamp(camViewPoint.y, 0.07f, 0.93f);
//Convert to world point then apply result to the target object
Vector3 finalPos = Camera.main.ViewportToWorldPoint(camViewPoint);
rb.MovePosition(finalPos);
}
image not respond .
but you can check player location
x = Input.GetAxis ("Horizontal") / 100 * speed;
if(gameobject.transform.x > someValue)
x=0
gameobject will be OBJECT in scene that u attach class to it.
another way is place 2 empty gameobject with collider as invisibleWall and get collider to player
Possible solution is:
1.Get the coordinates of your screen cornes (top left, top right, bottom left, bottom right). You can get this coordinates using Screen.height and Screen.width.
2.Convert this coordinates using the camera you need with Camera.ScreenToWorldPoint.
3.Get your player coordinates and check that they are inside the rect which is formed by 4 coordinates of the screen corners.
You need to limit your transform's position based on the edges of the camera. Here is an answer describing the different coordinate systems in unity
You're probably looking to do something like this:
float xMin = Camera.main.ViewportToWorldPoint(Vector3.zero).x;
float xMax = Camera.main.ViewportToWorldPoint(Vector3.one).x;
Vector3 currentPos = transform.position;
float dx = Input.GetAxis ("Horizontal") / 100 * speed;
Vector3 desiredPos = new Vector3(currentPos.x + dx, currentPos.y, currentPos.z);
Vector3 realPos = desiredPos;
if(desiredPos.x > xMax)
realPos.x = xMax;
else if(desiredPos.x < xMin)
realPos.x = xMin;
transform.position = realPos;
Read up here for more info on ViewportToWorldPoint(), it's extremely useful to become comfortable with the different coordinate spaces and how you can convert between them.
I have a simple project which includes pathfinding with obstacle avoidance. Now, I have void Steer which steers the object around since the path is not straight. then I have void AvoidObstacles which has raycast and the obstacle avoidance part basically.
Whenever the object steers, it calls the AvoidObstacles function. The problem now is, at the start, whenever it hasn't call in the Steer function yet, because it is a straigh line, it passes through the object not avoiding it.
Here are some of the codes used:
public Vector3 Steer(Vector3 target, bool bFinalPoint = false)
{
//Calculate the directional vector from the current position towards the target point
Vector3 desiredVelocity = (target - transform.position);
float dist = desiredVelocity.magnitude;
AvoidObstacles(ref desiredVelocity);
//Normalise the desired Velocity
desiredVelocity.Normalize();
//Calculate the velocity according to the speed
if (bFinalPoint && dist < 10.0f)
desiredVelocity *= (curSpeed * (dist / 10.0f));
else
desiredVelocity *= curSpeed;
//Calculate the force Vector
Vector3 steeringForce = desiredVelocity - velocity;
Vector3 acceleration = steeringForce / mass;
return acceleration;
}
here is the other one
public void AvoidObstacles(ref Vector3 desiredVelocity)
{
RaycastHit hit;
Vector3 leftRay = transform.position;
Vector3 rightRay = transform.position;
//leftRay.x -= 2;
//rightRay.x += 2;
Debug.DrawLine(transform.position,(transform.forward * 5) + transform.position,Color.green);
if(Physics.Raycast(transform.position, transform.forward,out hit, minimumDistToAvoid))
{
Debug.DrawLine(transform.position,(transform.forward * 10) + transform.position,Color.red);
if(hit.transform != transform)
{
//dir += hit.normal * 50;
//Get the normal of the hit point to calculate the new direction
Vector3 hitNormal = hit.normal;
hitNormal.y = 0.0f; //Don't want to move in Y-Space
//Get the new directional vector by adding force to vehicle's current forward vector
desiredVelocity = transform.forward + hitNormal * force;
}
}
}
and here is my update
void Update ()
{
//Unify the speed
curSpeed = speed * Time.deltaTime;
targetPoint = path.GetPoint(curPathIndex);
//If reach the radius within the path then move to next point in the path
if(Vector3.Distance(transform.position, targetPoint) < path.Radius)
{
//Don't move the vehicle if path is finished
if (curPathIndex < pathLength - 1)
curPathIndex ++;
else if (isLooping)
curPathIndex = 0;
else
return;
}
//Move the vehicle until the end point is reached in the path
if (curPathIndex >= pathLength )
return;
//Calculate the next Velocity towards the path
if(curPathIndex >= pathLength - 1 && !isLooping)
velocity += Steer(targetPoint, true);
else
velocity += Steer(targetPoint);
transform.position += velocity; //Move the vehicle according to the velocity
transform.rotation = Quaternion.LookRotation(velocity); //Rotate the vehicle towards the desired Velocity
//AvoidObstacles(ref Vector3 desiredVelocity);
dir.Normalize();
}
Maybe someone can help me out buy letting me know how can I call the avoidobstacle function outside of steer? Maybe in update or start perhaps.
I can't really use other algorithms, just this one right here. TIA